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3 files changed, +194 −78

part.py +135 −65

@@ -1,10 +1,10 @@

"""Miniature through-hole SPDT slide switch, C&K OS series OS102011: a steel shell over a phenolic base, a square actuator through a

slot in the shell, three terminals in a row and a snap-in leg at each end. MS2Q stands upright (actuator up); MA1Q is the right-angle

version (actuator along -Y, parallel to the board). The origin is at terminal 2, on the board's top face (the XY plane); the terminals

and legs lie along X. Dimensions from C&K's data sheet, in the README."""

"""Through-hole slide switches: a steel shell over an insulating base, an actuator through a slot in the shell, terminals in a row and

legs from the shell. C&K OS102011MS2Q stands upright (actuator up); C&K OS102011MA1Q and E-Switch EG1224 (SPDT) and EG2219 (DPDT) are

right-angle (actuator along -Y, parallel to the board). The origin is at the centre of the shell's footprint, on the board's top face

(the XY plane); the terminals lie along X. Dimensions from the makers' drawings, in the README."""

from steve import Model

kind = "MS2Q" # MS2Q: vertical (straight); MA1Q: right angle

kind = "MS2Q" # MS2Q: C&K vertical; MA1Q: C&K right angle; EG1224, EG2219: E-Switch right angle

position = 2 # Actuator position (1 or 2)

# Each entry: (shell length, shell width or depth, shell height, actuator out of the shell, actuator axis height (right angle only),

@@ -36,69 +36,139 @@

SHELL_T = 0.4

BARB = (-0.4, -1.4)

NOTCH = 0.6

# E-Switch, each entry: (terminal rows, the rows' Y).

# E-Switch drawing P040042 rev. A, "EG 1224 Non-Shorting", 4/27/98, and drawing P040170 rev. B, "EG 2219", 12/20/02 (datasheet.lcsc.com

# copies), mm: body 13.8 x 6.5, 8.5 high; actuator 5.0 wide and 4.0 high, its axis 5.5 above the board, 9.0 out of the body (8.5 beyond a

# 0.5 step); travel 4.0; terminals 4.0 apart, 0.5 wide and 0.4 thick, 3.5 below the board; four legs 0.8 wide and 0.5 thick, 12.0 apart

# along the terminals and 6.0 across. EG1224: one row of three terminals 1.75 from the back legs' row, the body's lower edge 1.5 above

# the board. EG2219: two rows 2.5 apart, between the legs' rows.

EG = {"EG1224": ((1.25,),), "EG2219": ((-1.25, 1.25),)}

EG_BODY = (13.8, 6.5, 8.5)

EG_LOW = 1.5

EG_ACTUATOR = (5.0, 4.0)

EG_AXIS = 5.5

EG_OUT = 9.0

EG_STEP = 0.5

EG_TRAVEL = 4.0

EG_PITCH = 4.0

EG_PIN = (0.5, 0.4)

EG_TIP = 3.5

EG_LEG = (0.8, 0.5)

EG_LEGS = (12.0, 6.0)

# Proportions, for looks only: the shell's sheet thickness (the legs' 0.5), the actuator's step 4.0 x 3.0 (narrower than the knob, as

# drawn), and EG2219's body lower edge, 1.5 above the board as on EG1224's drawing (EG2219's doesn't dimension it).

EG_SHELL_T = 0.5

EG_STEP_SIZE = (4.0, 3.0)

if kind not in KINDS:

raise ValueError(f"no type {kind!r}: {', '.join(KINDS)}")

if kind not in KINDS and kind not in EG:

raise ValueError(f"no type {kind!r}: {', '.join([*KINDS, *EG])}")

if position not in (1, 2):

raise ValueError("position is 1 or 2")

length, width, height, out, axis, base_low, angled = KINDS[kind]

slide = (position - 1.5) * TRAVEL # pos. 1 and 2 are a travel apart, centred on terminal 2

L, W = length / 2, width / 2

inner = L - SHELL_T

if kind in EG:

# E-Switch: right angle, the actuator a knob on a narrower step; four legs from the front and back walls.

(rows,) = EG[kind]

length, depth, height = EG_BODY

L, D, t = length / 2, depth / 2, EG_SHELL_T

slide = (position - 1.5) * EG_TRAVEL

aw, ah = EG_ACTUATOR

model = Model()

model.box("shell_top", length, depth, t, at=(0, 0, height - t / 2), op="new", body="shell_body", name="Shell top")

wall_h = height - EG_LOW

for side, sy in (("back", 1), ("front", -1)):

model.box(f"wall_{side}", length, t, wall_h, at=(0, sy * (D - t / 2), EG_LOW + wall_h / 2), op="join", body="shell_body",

name=f"Shell wall, {side}")

for side, sx in (("right", 1), ("left", -1)):

model.box(f"end_{side}", t, depth, wall_h, at=(sx * (L - t / 2), 0, EG_LOW + wall_h / 2), op="join", body="shell_body",

name=f"End wall, {side}")

lx, ly = EG_LEGS

for i, (sx, sy) in enumerate(((1, 1), (-1, 1), (-1, -1), (1, -1))):

model.box(f"leg_{i + 1}", EG_LEG[0], EG_LEG[1], EG_LOW + EG_TIP + 0.01, at=(sx * lx / 2, sy * ly / 2, (EG_LOW - EG_TIP + 0.01) / 2),

op="join", body="shell_body", name=f"Leg {i + 1}")

model.box("slot", aw + EG_TRAVEL, t + 0.2, ah, at=(0, -D + t / 2, EG_AXIS), op="cut", body="shell_body", name="Slot")

model.box("base", length - 2 * t, depth - 2 * t, height - t - EG_LOW, at=(0, 0, (EG_LOW + height - t) / 2), op="new", body="base_body",

name="Base")

sw, sh = EG_STEP_SIZE

model.box("actuator_step", sw, t + EG_STEP, sh, at=(slide, -D + t - (t + EG_STEP) / 2, EG_AXIS), op="new", body="actuator_body",

name="Actuator step")

knob = EG_OUT - EG_STEP

model.box("actuator", aw, knob + 0.01, ah, at=(slide, -D - EG_STEP - (knob - 0.01) / 2, EG_AXIS), op="join", body="actuator_body",

name="Actuator")

pins = []

for r, y in enumerate(rows):

for i in range(3):

n = r * 3 + i + 1

100

model.box(f"terminal_{n}", EG_PIN[0], EG_PIN[1], EG_LOW + EG_TIP, at=((i - 1) * EG_PITCH, y, (EG_LOW - EG_TIP) / 2), op="new",

101

body=f"terminal_{n}_body", name=f"Terminal {n}")

102

pins.append(f"terminal_{n}_body")

103

# Materials, for looks and a rough mass (the drawings name none): the shell sheet steel (steel-c10), the base black phenolic

104

# (bakelite), the actuator black POM (pom-copolymer), the terminals brass (brass), silver coloured.

105

model.material("steel-c10", bodies=["shell_body"], color="#c9ccd0")

106

model.material("bakelite", bodies=["base_body"], color="#2a2a2c")

107

model.material("pom-copolymer", bodies=["actuator_body"], color="#222325")

108

model.material("brass", bodies=pins, color="#d6d8db")

109

else:

110

# C&K OS102011.

111

length, width, height, out, axis, base_low, angled = KINDS[kind]

112

slide = (position - 1.5) * TRAVEL # pos. 1 and 2 are a travel apart, centred on terminal 2

113

L, W = length / 2, width / 2

114

inner = L - SHELL_T

115

model = Model()

# Shell: the end walls (whose legs reach through the board), the top, and the long sides (upright) or the front face (right angle); the

# actuator's slot, the actuator plus its travel long, in the top (upright) or in the front face (right angle).

model.box("shell_top", length, width, SHELL_T, at=(0, 0, height - SHELL_T / 2), op="new", body="shell_body", name="Shell top")

for side, sx in (("right", 1), ("left", -1)):

model.box(f"end_{side}", SHELL_T, width, height, at=(sx * (L - SHELL_T / 2), 0, height / 2), op="join", body="shell_body",

name=f"End wall, {side}")

model.box(f"leg_{side}", LEG_T, LEG_W, TIP + 0.01, at=(sx * LEG_PITCH / 2, 0, -(TIP - 0.01) / 2), op="join", body="shell_body",

name=f"Leg, {side}")

model.box(f"barb_{side}", LEG_T, BARB_W, BARB[0] - BARB[1], at=(sx * LEG_PITCH / 2, 0, (BARB[0] + BARB[1]) / 2), op="join",

body="shell_body", name=f"Leg barb, {side}")

if angled:

model.box("shell_front", length, SHELL_T, height, at=(0, -W + SHELL_T / 2, height / 2), op="join", body="shell_body", name="Shell front")

model.box("slot", ACTUATOR + TRAVEL, SHELL_T + 0.2, ACTUATOR, at=(0, -W + SHELL_T / 2, axis), op="cut", body="shell_body", name="Slot")

else:

for side, sy in (("back", 1), ("front", -1)):

model.box(f"side_{side}", length, SHELL_T, height - base_low, at=(0, sy * (W - SHELL_T / 2), (height + base_low) / 2), op="join",

body="shell_body", name=f"Shell side, {side}")

model.box("slot", ACTUATOR + TRAVEL, ACTUATOR, SHELL_T + 0.2, at=(0, 0, height - SHELL_T / 2), op="cut", body="shell_body", name="Slot")

# Base: the phenolic block inside the shell, from its lower edge up to the top.

front = -W + SHELL_T

back = W if angled else W - SHELL_T # the right-angle shell has no back

model.box("base", 2 * inner, back - front, height - SHELL_T - base_low, at=(0, (front + back) / 2, (base_low + height - SHELL_T) / 2),

op="new", body="base_body", name="Base")

# Actuator: square, out of the slot by `out`, a V notch in its end.

if angled:

a_in = -W + SHELL_T

a_end = -W - out

model.box("actuator", ACTUATOR, a_in - a_end, ACTUATOR, at=(slide, (a_in + a_end) / 2, axis), op="new", body="actuator_body",

name="Actuator")

with model.sketch("notch_sketch", on="XY", name="Actuator notch") as sk:

sk.polyline("notch_outline", [(slide - NOTCH / 2, a_end - 0.01), (slide + NOTCH / 2, a_end - 0.01), (slide, a_end + NOTCH)],

closed=True)

model.extrude("notch", "notch_sketch", distance=height, op="cut", body="actuator_body", name="Actuator notch")

else:

a_low = height - SHELL_T

a_end = height + out

model.box("actuator", ACTUATOR, ACTUATOR, a_end - a_low, at=(slide, 0, (a_low + a_end) / 2), op="new", body="actuator_body",

name="Actuator")

model.plane("notch_plane", on="XZ", offset=-(ACTUATOR / 2 + 0.1), name="Actuator notch")

with model.sketch("notch_sketch", on="notch_plane", name="Actuator notch") as sk:

sk.polyline("notch_outline", [(slide - NOTCH / 2, a_end + 0.01), (slide + NOTCH / 2, a_end + 0.01), (slide, a_end - NOTCH)],

closed=True)

model.extrude("notch", "notch_sketch", distance=ACTUATOR + 0.2, op="cut", body="actuator_body", name="Actuator notch")

# Terminals 1-3: straight down from the base's lower edge to the tips.

for i in range(3):

model.box(f"terminal_{i + 1}", PIN_W, PIN_T, base_low + TIP, at=((i - 1) * PITCH, 0, (base_low - TIP) / 2), op="new",

body=f"terminal_{i + 1}_body", name=f"Terminal {i + 1}")

# Materials (page I-37, Materials): base phenolic resin (bakelite), actuator POM, black (pom-copolymer), housing plate SPCC, tin plated

# (steel-c10), terminals brass, silver plated (brass, silver coloured).

model.material("steel-c10", bodies=["shell_body"], color="#c9ccd0")

100

model.material("bakelite", bodies=["base_body"], color="#a5562a")

101

model.material("pom-copolymer", bodies=["actuator_body"], color="#222325")

102

model.material("brass", bodies=[f"terminal_{i + 1}_body" for i in range(3)], color="#d6d8db")

116

model = Model()

117

# Shell: the end walls (whose legs reach through the board), the top, and the long sides (upright) or the front face (right angle); the

118

# actuator's slot, the actuator plus its travel long, in the top (upright) or in the front face (right angle).

119

model.box("shell_top", length, width, SHELL_T, at=(0, 0, height - SHELL_T / 2), op="new", body="shell_body", name="Shell top")

120

for side, sx in (("right", 1), ("left", -1)):

121

model.box(f"end_{side}", SHELL_T, width, height, at=(sx * (L - SHELL_T / 2), 0, height / 2), op="join", body="shell_body",

122

name=f"End wall, {side}")

123

model.box(f"leg_{side}", LEG_T, LEG_W, TIP + 0.01, at=(sx * LEG_PITCH / 2, 0, -(TIP - 0.01) / 2), op="join", body="shell_body",

124

name=f"Leg, {side}")

125

model.box(f"barb_{side}", LEG_T, BARB_W, BARB[0] - BARB[1], at=(sx * LEG_PITCH / 2, 0, (BARB[0] + BARB[1]) / 2), op="join",

126

body="shell_body", name=f"Leg barb, {side}")

127

if angled:

128

model.box("shell_front", length, SHELL_T, height, at=(0, -W + SHELL_T / 2, height / 2), op="join", body="shell_body",

129

name="Shell front")

130

model.box("slot", ACTUATOR + TRAVEL, SHELL_T + 0.2, ACTUATOR, at=(0, -W + SHELL_T / 2, axis), op="cut", body="shell_body",

131

name="Slot")

132

else:

133

for side, sy in (("back", 1), ("front", -1)):

134

model.box(f"side_{side}", length, SHELL_T, height - base_low, at=(0, sy * (W - SHELL_T / 2), (height + base_low) / 2),

135

op="join", body="shell_body", name=f"Shell side, {side}")

136

model.box("slot", ACTUATOR + TRAVEL, ACTUATOR, SHELL_T + 0.2, at=(0, 0, height - SHELL_T / 2), op="cut", body="shell_body",

137

name="Slot")

138

# Base: the phenolic block inside the shell, from its lower edge up to the top.

139

front = -W + SHELL_T

140

back = W if angled else W - SHELL_T # the right-angle shell has no back

141

model.box("base", 2 * inner, back - front, height - SHELL_T - base_low, at=(0, (front + back) / 2, (base_low + height - SHELL_T) / 2),

142

op="new", body="base_body", name="Base")

143

# Actuator: square, out of the slot by `out`, a V notch in its end.

144

if angled:

145

a_in = -W + SHELL_T

146

a_end = -W - out

147

model.box("actuator", ACTUATOR, a_in - a_end, ACTUATOR, at=(slide, (a_in + a_end) / 2, axis), op="new", body="actuator_body",

148

name="Actuator")

149

with model.sketch("notch_sketch", on="XY", name="Actuator notch") as sk:

150

sk.polyline("notch_outline", [(slide - NOTCH / 2, a_end - 0.01), (slide + NOTCH / 2, a_end - 0.01), (slide, a_end + NOTCH)],

151

closed=True)

152

model.extrude("notch", "notch_sketch", distance=height, op="cut", body="actuator_body", name="Actuator notch")

153

else:

154

a_low = height - SHELL_T

155

a_end = height + out

156

model.box("actuator", ACTUATOR, ACTUATOR, a_end - a_low, at=(slide, 0, (a_low + a_end) / 2), op="new", body="actuator_body",

157

name="Actuator")

158

model.plane("notch_plane", on="XZ", offset=-(ACTUATOR / 2 + 0.1), name="Actuator notch")

159

with model.sketch("notch_sketch", on="notch_plane", name="Actuator notch") as sk:

160

sk.polyline("notch_outline", [(slide - NOTCH / 2, a_end + 0.01), (slide + NOTCH / 2, a_end + 0.01), (slide, a_end - NOTCH)],

161

closed=True)

162

model.extrude("notch", "notch_sketch", distance=ACTUATOR + 0.2, op="cut", body="actuator_body", name="Actuator notch")

163

# Terminals 1-3: straight down from the base's lower edge to the tips.

164

for i in range(3):

165

model.box(f"terminal_{i + 1}", PIN_W, PIN_T, base_low + TIP, at=((i - 1) * PITCH, 0, (base_low - TIP) / 2), op="new",

166

body=f"terminal_{i + 1}_body", name=f"Terminal {i + 1}")

167

# Materials (page I-37, Materials): base phenolic resin (bakelite), actuator POM, black (pom-copolymer), housing plate SPCC, tin plated

168

# (steel-c10), terminals brass, silver plated (brass, silver coloured).

169

model.material("steel-c10", bodies=["shell_body"], color="#c9ccd0")

170

model.material("bakelite", bodies=["base_body"], color="#a5562a")

171

model.material("pom-copolymer", bodies=["actuator_body"], color="#222325")

172

model.material("brass", bodies=[f"terminal_{i + 1}_body" for i in range(3)], color="#d6d8db")

103

173

result = model.result()

104

174

--- 1.0.0/part.py
+++ 1.1.0/part.py
@@ -1,10 +1,10 @@
-"""Miniature through-hole SPDT slide switch, C&K OS series OS102011: a steel shell over a phenolic base, a square actuator through a
-slot in the shell, three terminals in a row and a snap-in leg at each end. MS2Q stands upright (actuator up); MA1Q is the right-angle
-version (actuator along -Y, parallel to the board). The origin is at terminal 2, on the board's top face (the XY plane); the terminals
-and legs lie along X. Dimensions from C&K's data sheet, in the README."""
+"""Through-hole slide switches: a steel shell over an insulating base, an actuator through a slot in the shell, terminals in a row and
+legs from the shell. C&K OS102011MS2Q stands upright (actuator up); C&K OS102011MA1Q and E-Switch EG1224 (SPDT) and EG2219 (DPDT) are
+right-angle (actuator along -Y, parallel to the board). The origin is at the centre of the shell's footprint, on the board's top face
+(the XY plane); the terminals lie along X. Dimensions from the makers' drawings, in the README."""
 from steve import Model
 
-kind = "MS2Q"  # MS2Q: vertical (straight); MA1Q: right angle
+kind = "MS2Q"  # MS2Q: C&K vertical; MA1Q: C&K right angle; EG1224, EG2219: E-Switch right angle
 position = 2  # Actuator position (1 or 2)
 
 # Each entry: (shell length, shell width or depth, shell height, actuator out of the shell, actuator axis height (right angle only),
@@ -36,68 +36,138 @@
 SHELL_T = 0.4
 BARB = (-0.4, -1.4)
 NOTCH = 0.6
+# E-Switch, each entry: (terminal rows, the rows' Y).
+#   E-Switch drawing P040042 rev. A, "EG 1224 Non-Shorting", 4/27/98, and drawing P040170 rev. B, "EG 2219", 12/20/02 (datasheet.lcsc.com
+#   copies), mm: body 13.8 x 6.5, 8.5 high; actuator 5.0 wide and 4.0 high, its axis 5.5 above the board, 9.0 out of the body (8.5 beyond a
+#   0.5 step); travel 4.0; terminals 4.0 apart, 0.5 wide and 0.4 thick, 3.5 below the board; four legs 0.8 wide and 0.5 thick, 12.0 apart
+#   along the terminals and 6.0 across. EG1224: one row of three terminals 1.75 from the back legs' row, the body's lower edge 1.5 above
+#   the board. EG2219: two rows 2.5 apart, between the legs' rows.
+EG = {"EG1224": ((1.25,),), "EG2219": ((-1.25, 1.25),)}
+EG_BODY = (13.8, 6.5, 8.5)
+EG_LOW = 1.5
+EG_ACTUATOR = (5.0, 4.0)
+EG_AXIS = 5.5
+EG_OUT = 9.0
+EG_STEP = 0.5
+EG_TRAVEL = 4.0
+EG_PITCH = 4.0
+EG_PIN = (0.5, 0.4)
+EG_TIP = 3.5
+EG_LEG = (0.8, 0.5)
+EG_LEGS = (12.0, 6.0)
+# Proportions, for looks only: the shell's sheet thickness (the legs' 0.5), the actuator's step 4.0 x 3.0 (narrower than the knob, as
+# drawn), and EG2219's body lower edge, 1.5 above the board as on EG1224's drawing (EG2219's doesn't dimension it).
+EG_SHELL_T = 0.5
+EG_STEP_SIZE = (4.0, 3.0)
 
-if kind not in KINDS:
-    raise ValueError(f"no type {kind!r}: {', '.join(KINDS)}")
+if kind not in KINDS and kind not in EG:
+    raise ValueError(f"no type {kind!r}: {', '.join([*KINDS, *EG])}")
 if position not in (1, 2):
     raise ValueError("position is 1 or 2")
-length, width, height, out, axis, base_low, angled = KINDS[kind]
-slide = (position - 1.5) * TRAVEL   # pos. 1 and 2 are a travel apart, centred on terminal 2
-L, W = length / 2, width / 2
-inner = L - SHELL_T
+if kind in EG:
+    # E-Switch: right angle, the actuator a knob on a narrower step; four legs from the front and back walls.
+    (rows,) = EG[kind]
+    length, depth, height = EG_BODY
+    L, D, t = length / 2, depth / 2, EG_SHELL_T
+    slide = (position - 1.5) * EG_TRAVEL
+    aw, ah = EG_ACTUATOR
+    model = Model()
+    model.box("shell_top", length, depth, t, at=(0, 0, height - t / 2), op="new", body="shell_body", name="Shell top")
+    wall_h = height - EG_LOW
+    for side, sy in (("back", 1), ("front", -1)):
+        model.box(f"wall_{side}", length, t, wall_h, at=(0, sy * (D - t / 2), EG_LOW + wall_h / 2), op="join", body="shell_body",
+                  name=f"Shell wall, {side}")
+    for side, sx in (("right", 1), ("left", -1)):
+        model.box(f"end_{side}", t, depth, wall_h, at=(sx * (L - t / 2), 0, EG_LOW + wall_h / 2), op="join", body="shell_body",
+                  name=f"End wall, {side}")
+    lx, ly = EG_LEGS
+    for i, (sx, sy) in enumerate(((1, 1), (-1, 1), (-1, -1), (1, -1))):
+        model.box(f"leg_{i + 1}", EG_LEG[0], EG_LEG[1], EG_LOW + EG_TIP + 0.01, at=(sx * lx / 2, sy * ly / 2, (EG_LOW - EG_TIP + 0.01) / 2),
+                  op="join", body="shell_body", name=f"Leg {i + 1}")
+    model.box("slot", aw + EG_TRAVEL, t + 0.2, ah, at=(0, -D + t / 2, EG_AXIS), op="cut", body="shell_body", name="Slot")
+    model.box("base", length - 2 * t, depth - 2 * t, height - t - EG_LOW, at=(0, 0, (EG_LOW + height - t) / 2), op="new", body="base_body",
+              name="Base")
+    sw, sh = EG_STEP_SIZE
+    model.box("actuator_step", sw, t + EG_STEP, sh, at=(slide, -D + t - (t + EG_STEP) / 2, EG_AXIS), op="new", body="actuator_body",
+              name="Actuator step")
+    knob = EG_OUT - EG_STEP
+    model.box("actuator", aw, knob + 0.01, ah, at=(slide, -D - EG_STEP - (knob - 0.01) / 2, EG_AXIS), op="join", body="actuator_body",
+              name="Actuator")
+    pins = []
+    for r, y in enumerate(rows):
+        for i in range(3):
+            n = r * 3 + i + 1
+            model.box(f"terminal_{n}", EG_PIN[0], EG_PIN[1], EG_LOW + EG_TIP, at=((i - 1) * EG_PITCH, y, (EG_LOW - EG_TIP) / 2), op="new",
+                      body=f"terminal_{n}_body", name=f"Terminal {n}")
+            pins.append(f"terminal_{n}_body")
+    # Materials, for looks and a rough mass (the drawings name none): the shell sheet steel (steel-c10), the base black phenolic
+    # (bakelite), the actuator black POM (pom-copolymer), the terminals brass (brass), silver coloured.
+    model.material("steel-c10", bodies=["shell_body"], color="#c9ccd0")
+    model.material("bakelite", bodies=["base_body"], color="#2a2a2c")
+    model.material("pom-copolymer", bodies=["actuator_body"], color="#222325")
+    model.material("brass", bodies=pins, color="#d6d8db")
+else:
+    # C&K OS102011.
+    length, width, height, out, axis, base_low, angled = KINDS[kind]
+    slide = (position - 1.5) * TRAVEL   # pos. 1 and 2 are a travel apart, centred on terminal 2
+    L, W = length / 2, width / 2
+    inner = L - SHELL_T
 
-model = Model()
-# Shell: the end walls (whose legs reach through the board), the top, and the long sides (upright) or the front face (right angle); the
-# actuator's slot, the actuator plus its travel long, in the top (upright) or in the front face (right angle).
-model.box("shell_top", length, width, SHELL_T, at=(0, 0, height - SHELL_T / 2), op="new", body="shell_body", name="Shell top")
-for side, sx in (("right", 1), ("left", -1)):
-    model.box(f"end_{side}", SHELL_T, width, height, at=(sx * (L - SHELL_T / 2), 0, height / 2), op="join", body="shell_body",
-              name=f"End wall, {side}")
-    model.box(f"leg_{side}", LEG_T, LEG_W, TIP + 0.01, at=(sx * LEG_PITCH / 2, 0, -(TIP - 0.01) / 2), op="join", body="shell_body",
-              name=f"Leg, {side}")
-    model.box(f"barb_{side}", LEG_T, BARB_W, BARB[0] - BARB[1], at=(sx * LEG_PITCH / 2, 0, (BARB[0] + BARB[1]) / 2), op="join",
-              body="shell_body", name=f"Leg barb, {side}")
-if angled:
-    model.box("shell_front", length, SHELL_T, height, at=(0, -W + SHELL_T / 2, height / 2), op="join", body="shell_body", name="Shell front")
-    model.box("slot", ACTUATOR + TRAVEL, SHELL_T + 0.2, ACTUATOR, at=(0, -W + SHELL_T / 2, axis), op="cut", body="shell_body", name="Slot")
-else:
-    for side, sy in (("back", 1), ("front", -1)):
-        model.box(f"side_{side}", length, SHELL_T, height - base_low, at=(0, sy * (W - SHELL_T / 2), (height + base_low) / 2), op="join",
-                  body="shell_body", name=f"Shell side, {side}")
-    model.box("slot", ACTUATOR + TRAVEL, ACTUATOR, SHELL_T + 0.2, at=(0, 0, height - SHELL_T / 2), op="cut", body="shell_body", name="Slot")
-# Base: the phenolic block inside the shell, from its lower edge up to the top.
-front = -W + SHELL_T
-back = W if angled else W - SHELL_T   # the right-angle shell has no back
-model.box("base", 2 * inner, back - front, height - SHELL_T - base_low, at=(0, (front + back) / 2, (base_low + height - SHELL_T) / 2),
-          op="new", body="base_body", name="Base")
-# Actuator: square, out of the slot by `out`, a V notch in its end.
-if angled:
-    a_in = -W + SHELL_T
-    a_end = -W - out
-    model.box("actuator", ACTUATOR, a_in - a_end, ACTUATOR, at=(slide, (a_in + a_end) / 2, axis), op="new", body="actuator_body",
-              name="Actuator")
-    with model.sketch("notch_sketch", on="XY", name="Actuator notch") as sk:
-        sk.polyline("notch_outline", [(slide - NOTCH / 2, a_end - 0.01), (slide + NOTCH / 2, a_end - 0.01), (slide, a_end + NOTCH)],
-                    closed=True)
-    model.extrude("notch", "notch_sketch", distance=height, op="cut", body="actuator_body", name="Actuator notch")
-else:
-    a_low = height - SHELL_T
-    a_end = height + out
-    model.box("actuator", ACTUATOR, ACTUATOR, a_end - a_low, at=(slide, 0, (a_low + a_end) / 2), op="new", body="actuator_body",
-              name="Actuator")
-    model.plane("notch_plane", on="XZ", offset=-(ACTUATOR / 2 + 0.1), name="Actuator notch")
-    with model.sketch("notch_sketch", on="notch_plane", name="Actuator notch") as sk:
-        sk.polyline("notch_outline", [(slide - NOTCH / 2, a_end + 0.01), (slide + NOTCH / 2, a_end + 0.01), (slide, a_end - NOTCH)],
-                    closed=True)
-    model.extrude("notch", "notch_sketch", distance=ACTUATOR + 0.2, op="cut", body="actuator_body", name="Actuator notch")
-# Terminals 1-3: straight down from the base's lower edge to the tips.
-for i in range(3):
-    model.box(f"terminal_{i + 1}", PIN_W, PIN_T, base_low + TIP, at=((i - 1) * PITCH, 0, (base_low - TIP) / 2), op="new",
-              body=f"terminal_{i + 1}_body", name=f"Terminal {i + 1}")
-# Materials (page I-37, Materials): base phenolic resin (bakelite), actuator POM, black (pom-copolymer), housing plate SPCC, tin plated
-# (steel-c10), terminals brass, silver plated (brass, silver coloured).
-model.material("steel-c10", bodies=["shell_body"], color="#c9ccd0")
-model.material("bakelite", bodies=["base_body"], color="#a5562a")
-model.material("pom-copolymer", bodies=["actuator_body"], color="#222325")
-model.material("brass", bodies=[f"terminal_{i + 1}_body" for i in range(3)], color="#d6d8db")
+    model = Model()
+    # Shell: the end walls (whose legs reach through the board), the top, and the long sides (upright) or the front face (right angle); the
+    # actuator's slot, the actuator plus its travel long, in the top (upright) or in the front face (right angle).
+    model.box("shell_top", length, width, SHELL_T, at=(0, 0, height - SHELL_T / 2), op="new", body="shell_body", name="Shell top")
+    for side, sx in (("right", 1), ("left", -1)):
+        model.box(f"end_{side}", SHELL_T, width, height, at=(sx * (L - SHELL_T / 2), 0, height / 2), op="join", body="shell_body",
+                  name=f"End wall, {side}")
+        model.box(f"leg_{side}", LEG_T, LEG_W, TIP + 0.01, at=(sx * LEG_PITCH / 2, 0, -(TIP - 0.01) / 2), op="join", body="shell_body",
+                  name=f"Leg, {side}")
+        model.box(f"barb_{side}", LEG_T, BARB_W, BARB[0] - BARB[1], at=(sx * LEG_PITCH / 2, 0, (BARB[0] + BARB[1]) / 2), op="join",
+                  body="shell_body", name=f"Leg barb, {side}")
+    if angled:
+        model.box("shell_front", length, SHELL_T, height, at=(0, -W + SHELL_T / 2, height / 2), op="join", body="shell_body",
+                  name="Shell front")
+        model.box("slot", ACTUATOR + TRAVEL, SHELL_T + 0.2, ACTUATOR, at=(0, -W + SHELL_T / 2, axis), op="cut", body="shell_body",
+                  name="Slot")
+    else:
+        for side, sy in (("back", 1), ("front", -1)):
+            model.box(f"side_{side}", length, SHELL_T, height - base_low, at=(0, sy * (W - SHELL_T / 2), (height + base_low) / 2),
+                      op="join", body="shell_body", name=f"Shell side, {side}")
+        model.box("slot", ACTUATOR + TRAVEL, ACTUATOR, SHELL_T + 0.2, at=(0, 0, height - SHELL_T / 2), op="cut", body="shell_body",
+                  name="Slot")
+    # Base: the phenolic block inside the shell, from its lower edge up to the top.
+    front = -W + SHELL_T
+    back = W if angled else W - SHELL_T   # the right-angle shell has no back
+    model.box("base", 2 * inner, back - front, height - SHELL_T - base_low, at=(0, (front + back) / 2, (base_low + height - SHELL_T) / 2),
+              op="new", body="base_body", name="Base")
+    # Actuator: square, out of the slot by `out`, a V notch in its end.
+    if angled:
+        a_in = -W + SHELL_T
+        a_end = -W - out
+        model.box("actuator", ACTUATOR, a_in - a_end, ACTUATOR, at=(slide, (a_in + a_end) / 2, axis), op="new", body="actuator_body",
+                  name="Actuator")
+        with model.sketch("notch_sketch", on="XY", name="Actuator notch") as sk:
+            sk.polyline("notch_outline", [(slide - NOTCH / 2, a_end - 0.01), (slide + NOTCH / 2, a_end - 0.01), (slide, a_end + NOTCH)],
+                        closed=True)
+        model.extrude("notch", "notch_sketch", distance=height, op="cut", body="actuator_body", name="Actuator notch")
+    else:
+        a_low = height - SHELL_T
+        a_end = height + out
+        model.box("actuator", ACTUATOR, ACTUATOR, a_end - a_low, at=(slide, 0, (a_low + a_end) / 2), op="new", body="actuator_body",
+                  name="Actuator")
+        model.plane("notch_plane", on="XZ", offset=-(ACTUATOR / 2 + 0.1), name="Actuator notch")
+        with model.sketch("notch_sketch", on="notch_plane", name="Actuator notch") as sk:
+            sk.polyline("notch_outline", [(slide - NOTCH / 2, a_end + 0.01), (slide + NOTCH / 2, a_end + 0.01), (slide, a_end - NOTCH)],
+                        closed=True)
+        model.extrude("notch", "notch_sketch", distance=ACTUATOR + 0.2, op="cut", body="actuator_body", name="Actuator notch")
+    # Terminals 1-3: straight down from the base's lower edge to the tips.
+    for i in range(3):
+        model.box(f"terminal_{i + 1}", PIN_W, PIN_T, base_low + TIP, at=((i - 1) * PITCH, 0, (base_low - TIP) / 2), op="new",
+                  body=f"terminal_{i + 1}_body", name=f"Terminal {i + 1}")
+    # Materials (page I-37, Materials): base phenolic resin (bakelite), actuator POM, black (pom-copolymer), housing plate SPCC, tin plated
+    # (steel-c10), terminals brass, silver plated (brass, silver coloured).
+    model.material("steel-c10", bodies=["shell_body"], color="#c9ccd0")
+    model.material("bakelite", bodies=["base_body"], color="#a5562a")
+    model.material("pom-copolymer", bodies=["actuator_body"], color="#222325")
+    model.material("brass", bodies=[f"terminal_{i + 1}_body" for i in range(3)], color="#d6d8db")
 result = model.result()

pypart.toml +21 −7

@@ -1,17 +1,17 @@

name = "steve/slide-switch-tht"

version = "1.0.0"

version = "1.1.0"

runtime = "steve"

license = "MIT"

summary = "Miniature through-hole SPDT slide switches, C&K OS102011: vertical (MS2Q) and right-angle (MA1Q), from C&K's OS series data sheet."

description = """Miniature through-hole SPDT slide switch, C&K OS series OS102011, from C&K's data sheet (8 aug 17): a steel shell 8.6 long and 4.7 high over a phenolic base, a 2.0 mm square actuator with 2.0 mm travel, three terminals on a 2.0 mm pitch and a snap-in leg at each end, 8.2 apart. MS2Q stands upright with the actuator 4.0 above the shell; MA1Q is the right-angle version with the actuator 4.0 out of the shell's front, 2.6 above the board. See the README."""

tags = ["slide-switch", "switch", "spdt", "through-hole", "c-and-k", "electronics"]

summary = "Through-hole slide switches from the makers' drawings: C&K OS102011 SPDT, vertical (MS2Q) and right-angle (MA1Q); E-Switch EG1224 (SPDT) and EG2219 (DPDT), right-angle."

description = """Through-hole slide switch from the makers' drawings. C&K OS102011 (SPDT): steel shell 8.6 x 4.7 high over a phenolic base, 2.0 square actuator, 2.0 travel, terminals on 2.0, a leg at each end; MS2Q upright with the actuator 4.0 above, MA1Q right-angle. E-Switch EG1224 (SPDT) and EG2219 (DPDT): right-angle, body 13.8 x 6.5 x 8.5, a 5.0 x 4.0 actuator 9.0 out, 4.0 travel, terminals on 4.0, four legs. See the README."""

tags = ["slide-switch", "switch", "spdt", "dpdt", "through-hole", "c-and-k", "e-switch", "electronics"]

[parameters.kind]

type = "choice"

default = "MS2Q"

choices = ["MS2Q", "MA1Q"]

choices = ["MS2Q", "MA1Q", "EG1224", "EG2219"]

label = "Type"

description = "MS2Q: vertical (actuator up); MA1Q: right angle (actuator parallel to the board)."

description = "C&K MS2Q: vertical (actuator up); C&K MA1Q: right angle; E-Switch EG1224 (SPDT) and EG2219 (DPDT): right angle."

[parameters.position]

type = "integer"

@@ -19,7 +19,7 @@

min = 1

max = 2

label = "Actuator position"

description = "1 or 2 (the data sheet draws position 2)."

description = "1 or 2 (the C&K sheet draws position 2)."

[[presets]]

id = "os102011ms2q"

@@ -35,3 +35,17 @@

aliases = ["C&K OS102011MA1Q", "OS102011MA1QN1", "OS102011MA1QN1C", "OS102011MA1QS1", "OS102011MA1QS1C"]

standard = "C&K OS"

[[presets]]

id = "eg1224"

title = "E-Switch EG1224, SPDT slide switch, right angle"

params = { kind = "EG1224" }

aliases = ["E-Switch EG1224", "EG1224"]

standard = "E-Switch EG"

[[presets]]

id = "eg2219"

title = "E-Switch EG2219, DPDT slide switch, right angle"

params = { kind = "EG2219" }

aliases = ["E-Switch EG2219", "EG2219"]

standard = "E-Switch EG"

--- 1.0.0/pypart.toml
+++ 1.1.0/pypart.toml
@@ -1,17 +1,17 @@
 name = "steve/slide-switch-tht"
-version = "1.0.0"
+version = "1.1.0"
 runtime = "steve"
 license = "MIT"
-summary = "Miniature through-hole SPDT slide switches, C&K OS102011: vertical (MS2Q) and right-angle (MA1Q), from C&K's OS series data sheet."
-description = """Miniature through-hole SPDT slide switch, C&K OS series OS102011, from C&K's data sheet (8 aug 17): a steel shell 8.6 long and 4.7 high over a phenolic base, a 2.0 mm square actuator with 2.0 mm travel, three terminals on a 2.0 mm pitch and a snap-in leg at each end, 8.2 apart. MS2Q stands upright with the actuator 4.0 above the shell; MA1Q is the right-angle version with the actuator 4.0 out of the shell's front, 2.6 above the board. See the README."""
-tags = ["slide-switch", "switch", "spdt", "through-hole", "c-and-k", "electronics"]
+summary = "Through-hole slide switches from the makers' drawings: C&K OS102011 SPDT, vertical (MS2Q) and right-angle (MA1Q); E-Switch EG1224 (SPDT) and EG2219 (DPDT), right-angle."
+description = """Through-hole slide switch from the makers' drawings. C&K OS102011 (SPDT): steel shell 8.6 x 4.7 high over a phenolic base, 2.0 square actuator, 2.0 travel, terminals on 2.0, a leg at each end; MS2Q upright with the actuator 4.0 above, MA1Q right-angle. E-Switch EG1224 (SPDT) and EG2219 (DPDT): right-angle, body 13.8 x 6.5 x 8.5, a 5.0 x 4.0 actuator 9.0 out, 4.0 travel, terminals on 4.0, four legs. See the README."""
+tags = ["slide-switch", "switch", "spdt", "dpdt", "through-hole", "c-and-k", "e-switch", "electronics"]
 
 [parameters.kind]
 type = "choice"
 default = "MS2Q"
-choices = ["MS2Q", "MA1Q"]
+choices = ["MS2Q", "MA1Q", "EG1224", "EG2219"]
 label = "Type"
-description = "MS2Q: vertical (actuator up); MA1Q: right angle (actuator parallel to the board)."
+description = "C&K MS2Q: vertical (actuator up); C&K MA1Q: right angle; E-Switch EG1224 (SPDT) and EG2219 (DPDT): right angle."
 
 [parameters.position]
 type = "integer"
@@ -19,7 +19,7 @@
 min = 1
 max = 2
 label = "Actuator position"
-description = "1 or 2 (the data sheet draws position 2)."
+description = "1 or 2 (the C&K sheet draws position 2)."
 
 [[presets]]
 id = "os102011ms2q"
@@ -34,3 +34,17 @@
 params = { kind = "MA1Q" }
 aliases = ["C&K OS102011MA1Q", "OS102011MA1QN1", "OS102011MA1QN1C", "OS102011MA1QS1", "OS102011MA1QS1C"]
 standard = "C&K OS"
+
+[[presets]]
+id = "eg1224"
+title = "E-Switch EG1224, SPDT slide switch, right angle"
+params = { kind = "EG1224" }
+aliases = ["E-Switch EG1224", "EG1224"]
+standard = "E-Switch EG"
+
+[[presets]]
+id = "eg2219"
+title = "E-Switch EG2219, DPDT slide switch, right angle"
+params = { kind = "EG2219" }
+aliases = ["E-Switch EG2219", "EG2219"]
+standard = "E-Switch EG"

README.md +38 −6

@@ -1,10 +1,15 @@

# Through-hole slide switch, miniature SPDT

# Through-hole slide switch

A miniature through-hole SPDT slide switch, C&K's OS series OS102011. It has a steel shell over a phenolic base, a square actuator through a slot in the shell, three terminals in a row, and a snap-in leg at each end. MS2Q stands upright with the actuator on top. MA1Q is the right-angle version: the actuator comes out of the shell's front, parallel to the board.

A through-hole slide switch with a steel shell over an insulating base, an actuator through a slot in the shell, terminals in a row, and legs from the shell:

The origin is at terminal 2, on the board's top face (the XY plane). The terminals and legs lie along X. The right-angle actuator points along -Y.

- C&K's miniature SPDT OS102011, with three terminals and a snap-in leg at each end. MS2Q stands upright with the actuator on top. MA1Q is the right-angle version: the actuator comes out of the shell's front, parallel to the board.

- E-Switch's EG1224 (SPDT, one row of three terminals) and EG2219 (DPDT, two rows), right-angle, with a large actuator knob and four legs.

`kind` is the type. `position` is where the actuator sits: positions 1 and 2 are the travel apart, centred on terminal 2 (position 1 connects terminals 1-2, position 2 connects 2-3).

The origin is at the centre of the shell's footprint, on the board's top face (the XY plane); for the C&K types that is terminal 2. The terminals lie along X. The right-angle actuator points along -Y.

`kind` is the type. `position` is where the actuator sits: positions 1 and 2 are the travel apart, centred on the middle terminal (position 1 connects terminals 1-2, position 2 connects 2-3).

## C&K OS102011

|---|---|---|---|---|

@@ -21,6 +26,23 @@

- The terminals and legs reach 2.8 below the board. The vertical type's shell top is 7.5 above the tips.

- PC mounting: the terminals go in Ø0.8 holes, and the legs in Ø1.5 holes, 2.1 from terminals 1 and 3.

## E-Switch EG1224 and EG2219

| Type | Circuit | Terminals |

|---|---|---|

| EG1224 | SPDT, non-shorting | one row of three, 1.75 from the back legs' row |

| EG2219 | DPDT, non-shorting | two rows of three, 2.5 apart, between the legs' rows |

For both:

- The body is 13.8 x 6.5 and 8.5 high.

- The actuator is 5.0 wide and 4.0 high, its axis 5.5 above the board. It comes 9.0 out of the body: a 0.5 step, then the knob 8.5 long. The travel is 4.0.

- The terminals are 4.0 apart, 0.5 wide and 0.4 thick.

- Four legs, 0.8 wide and 0.5 thick, are 12.0 apart along the terminals and 6.0 across.

- The terminals and legs reach 3.5 below the board.

- EG1224's body lower edge is 1.5 above the board.

- PCB holes (EG2219's drawing): Ø1.2 for the legs and Ø0.9 for the terminals.

## Source

C&K, *OS Series, Miniature Slide Switches*, dated 8 aug 17, catalogue pages I-37 to I-43, from the copy at datasheet.lcsc.com (<https://datasheet.lcsc.com/datasheet/pdf/9e68893bade4341f8dc17b91bf8fc979.pdf>, LCSC part C221829; C&K's own site isn't used). Dimensions are in inches (mm); the mm values are used here.

@@ -31,14 +53,22 @@

The sheet gives no weight.

E-Switch's drawings, both in mm, from the copies at datasheet.lcsc.com:

- Drawing P040042 rev. A, *EG 1224 Non-Shorting*, 4/27/98, scale 3:1 (<https://datasheet.lcsc.com/datasheet/pdf/81a8fbc03a60aba6b6e95cd6436e5e9a.pdf>, LCSC part C273395): body 13.80 x 6.50, 8.50 high; actuator 5.00 wide, 4.00 high, 9.00 out of the body and 8.50 beyond its step; actuator axis 5.50 above the board; body lower edge 1.50 above it; terminals 4.00 apart, 0.50 wide, 0.40 thick; legs 0.80 wide, 0.50 thick, 12.00 and 6.00 apart; terminals 1.75 from the back legs' row; 3.50 below the board; travel 4.0 mm (note 4). Tolerances ±0.4 (0.0) and ±0.25 (0.00).

- Drawing P040170 rev. B, *EG 2219*, 12/20/02, scale 2:1 (<https://datasheet.lcsc.com/datasheet/pdf/45b5d88da26f8e98312dcd5197ffd830.pdf>, LCSC part C3664594): body 13.8 x 6.5, 8.5 high; actuator 5.0 wide, 4.0 high, 8.5 beyond a 0.5 step; axis 5.5; terminals 4.0 apart, 0.5 wide, 0.4 thick, in two rows 2.5 apart; legs 0.8 wide, 0.5 thick, 12.0 and 6.0 apart; 3.5 below the board; travel 4.00 mm (note 5); PCB holes 4x Ø1.2 and 6x Ø0.9.

The drawings give no weight and name no materials.

**Proportions, for looks only.** The drawings don't dimension the following:

- The shell's sheet thickness, 0.4, as the legs'.

- The shell's sheet thickness: 0.4 for C&K (the legs'), 0.5 for E-Switch (the legs').

- E-Switch: the actuator's step, 4.0 x 3.0, narrower than the knob as drawn; and EG2219's body lower edge, 1.5 above the board as on EG1224's drawing (EG2219's doesn't dimension it). The base fills the shell from that edge, and the slot is the actuator plus its travel long.

- Where the barb sits on the leg: from 0.4 to 1.4 below the board.

- The V notch in the actuator's end, 0.6 wide and deep.

- The shell is drawn as plain plates: on the vertical type the top, the long sides down to the base's lower edge, and the end walls down to the board; on the right-angle type the top, the front (with the slot) and the end walls. The slot is the actuator plus its travel long.

Materials follow the sheet: the shell sheet steel (`steel-c10`), the base phenolic (`bakelite`), the actuator black POM (`pom-copolymer`), and the terminals brass (`brass`), silver coloured. **Mass check:** the sheet states no weight. As modelled, MS2Q is 0.41 g shell + 0.13 g base + 0.02 g actuator + 0.01 g terminals = 0.57 g, and MA1Q is 0.52 g.

For C&K, materials follow the sheet: the shell sheet steel (`steel-c10`), the base phenolic (`bakelite`), the actuator black POM (`pom-copolymer`), and the terminals brass (`brass`), silver coloured. **Mass check:** the sheet states no weight. As modelled, MS2Q is 0.41 g shell + 0.13 g base + 0.02 g actuator + 0.01 g terminals = 0.57 g, and MA1Q is 0.52 g. E-Switch's drawings name no materials, so the same are used for looks (the base black). EG1224 as modelled is 1.26 g shell + 0.59 g base + 0.26 g actuator + 0.03 g terminals = 2.14 g; no weight is stated.

## Catalogue models

@@ -56,5 +86,7 @@

| Legs | 0.4 thick, 8.2 apart, up to 1.07 wide, narrowing to 0.59 at the tip | 0.4 thick, 8.2 apart, 1.2 wide, barbs 1.5 |

| Actuator position | between terminals 1 and 2 (position 1) | drawn in position 2 |

The old `SW E-Switch EG1224 SPDT Angled` and `SW E-Switch EG2219 DPDT Angled` models name these exact parts, so they map to EG1224 and EG2219. Measured on the reference models (2026-11-06), they match the drawings: body 13.8 x 6.5 x 8.5; actuator 5.0 x 4.0 on a 5.5 axis, 9.0 out with a 0.5 step (4.0 x 4.0 there); terminals 0.5 x 0.4 on 4.0, rows 1.75 from the back legs (EG2219 2.5 apart); legs 0.8 x 0.5, 12.0 by 6.0; 3.5 below the board. Their body lower edge is between 1.0 and 1.4 above the board, against EG1224's drawn 1.5, and their actuator sits in position 1.

The family's other switches (DIP switches, tactile switches and other makers' switches) are other parts. See `COVERAGE.md`.

--- 1.0.0/README.md
+++ 1.1.0/README.md
@@ -1,10 +1,15 @@
-# Through-hole slide switch, miniature SPDT
+# Through-hole slide switch
 
-A miniature through-hole SPDT slide switch, C&K's OS series OS102011. It has a steel shell over a phenolic base, a square actuator through a slot in the shell, three terminals in a row, and a snap-in leg at each end. MS2Q stands upright with the actuator on top. MA1Q is the right-angle version: the actuator comes out of the shell's front, parallel to the board.
+A through-hole slide switch with a steel shell over an insulating base, an actuator through a slot in the shell, terminals in a row, and legs from the shell:
 
-The origin is at terminal 2, on the board's top face (the XY plane). The terminals and legs lie along X. The right-angle actuator points along -Y.
+- C&K's miniature SPDT OS102011, with three terminals and a snap-in leg at each end. MS2Q stands upright with the actuator on top. MA1Q is the right-angle version: the actuator comes out of the shell's front, parallel to the board.
+- E-Switch's EG1224 (SPDT, one row of three terminals) and EG2219 (DPDT, two rows), right-angle, with a large actuator knob and four legs.
 
-`kind` is the type. `position` is where the actuator sits: positions 1 and 2 are the travel apart, centred on terminal 2 (position 1 connects terminals 1-2, position 2 connects 2-3).
+The origin is at the centre of the shell's footprint, on the board's top face (the XY plane); for the C&K types that is terminal 2. The terminals lie along X. The right-angle actuator points along -Y.
+
+`kind` is the type. `position` is where the actuator sits: positions 1 and 2 are the travel apart, centred on the middle terminal (position 1 connects terminals 1-2, position 2 connects 2-3).
+
+## C&K OS102011
 
 | Type | Parts | Shell (long x wide/deep x high) | Actuator | Base's lower edge |
 |---|---|---|---|---|
@@ -21,6 +26,23 @@
 - The terminals and legs reach 2.8 below the board. The vertical type's shell top is 7.5 above the tips.
 - PC mounting: the terminals go in Ø0.8 holes, and the legs in Ø1.5 holes, 2.1 from terminals 1 and 3.
 
+## E-Switch EG1224 and EG2219
+
+| Type | Circuit | Terminals |
+|---|---|---|
+| EG1224 | SPDT, non-shorting | one row of three, 1.75 from the back legs' row |
+| EG2219 | DPDT, non-shorting | two rows of three, 2.5 apart, between the legs' rows |
+
+For both:
+
+- The body is 13.8 x 6.5 and 8.5 high.
+- The actuator is 5.0 wide and 4.0 high, its axis 5.5 above the board. It comes 9.0 out of the body: a 0.5 step, then the knob 8.5 long. The travel is 4.0.
+- The terminals are 4.0 apart, 0.5 wide and 0.4 thick.
+- Four legs, 0.8 wide and 0.5 thick, are 12.0 apart along the terminals and 6.0 across.
+- The terminals and legs reach 3.5 below the board.
+- EG1224's body lower edge is 1.5 above the board.
+- PCB holes (EG2219's drawing): Ø1.2 for the legs and Ø0.9 for the terminals.
+
 ## Source
 
 C&K, *OS Series, Miniature Slide Switches*, dated 8 aug 17, catalogue pages I-37 to I-43, from the copy at datasheet.lcsc.com (<https://datasheet.lcsc.com/datasheet/pdf/9e68893bade4341f8dc17b91bf8fc979.pdf>, LCSC part C221829; C&K's own site isn't used). Dimensions are in inches (mm); the mm values are used here.
@@ -31,14 +53,22 @@
 
 The sheet gives no weight.
 
+E-Switch's drawings, both in mm, from the copies at datasheet.lcsc.com:
+
+- Drawing P040042 rev. A, *EG 1224 Non-Shorting*, 4/27/98, scale 3:1 (<https://datasheet.lcsc.com/datasheet/pdf/81a8fbc03a60aba6b6e95cd6436e5e9a.pdf>, LCSC part C273395): body 13.80 x 6.50, 8.50 high; actuator 5.00 wide, 4.00 high, 9.00 out of the body and 8.50 beyond its step; actuator axis 5.50 above the board; body lower edge 1.50 above it; terminals 4.00 apart, 0.50 wide, 0.40 thick; legs 0.80 wide, 0.50 thick, 12.00 and 6.00 apart; terminals 1.75 from the back legs' row; 3.50 below the board; travel 4.0 mm (note 4). Tolerances ±0.4 (0.0) and ±0.25 (0.00).
+- Drawing P040170 rev. B, *EG 2219*, 12/20/02, scale 2:1 (<https://datasheet.lcsc.com/datasheet/pdf/45b5d88da26f8e98312dcd5197ffd830.pdf>, LCSC part C3664594): body 13.8 x 6.5, 8.5 high; actuator 5.0 wide, 4.0 high, 8.5 beyond a 0.5 step; axis 5.5; terminals 4.0 apart, 0.5 wide, 0.4 thick, in two rows 2.5 apart; legs 0.8 wide, 0.5 thick, 12.0 and 6.0 apart; 3.5 below the board; travel 4.00 mm (note 5); PCB holes 4x Ø1.2 and 6x Ø0.9.
+
+The drawings give no weight and name no materials.
+
 **Proportions, for looks only.** The drawings don't dimension the following:
 
-- The shell's sheet thickness, 0.4, as the legs'.
+- The shell's sheet thickness: 0.4 for C&K (the legs'), 0.5 for E-Switch (the legs').
+- E-Switch: the actuator's step, 4.0 x 3.0, narrower than the knob as drawn; and EG2219's body lower edge, 1.5 above the board as on EG1224's drawing (EG2219's doesn't dimension it). The base fills the shell from that edge, and the slot is the actuator plus its travel long.
 - Where the barb sits on the leg: from 0.4 to 1.4 below the board.
 - The V notch in the actuator's end, 0.6 wide and deep.
 - The shell is drawn as plain plates: on the vertical type the top, the long sides down to the base's lower edge, and the end walls down to the board; on the right-angle type the top, the front (with the slot) and the end walls. The slot is the actuator plus its travel long.
 
-Materials follow the sheet: the shell sheet steel (`steel-c10`), the base phenolic (`bakelite`), the actuator black POM (`pom-copolymer`), and the terminals brass (`brass`), silver coloured. **Mass check:** the sheet states no weight. As modelled, MS2Q is 0.41 g shell + 0.13 g base + 0.02 g actuator + 0.01 g terminals = 0.57 g, and MA1Q is 0.52 g.
+For C&K, materials follow the sheet: the shell sheet steel (`steel-c10`), the base phenolic (`bakelite`), the actuator black POM (`pom-copolymer`), and the terminals brass (`brass`), silver coloured. **Mass check:** the sheet states no weight. As modelled, MS2Q is 0.41 g shell + 0.13 g base + 0.02 g actuator + 0.01 g terminals = 0.57 g, and MA1Q is 0.52 g. E-Switch's drawings name no materials, so the same are used for looks (the base black). EG1224 as modelled is 1.26 g shell + 0.59 g base + 0.26 g actuator + 0.03 g terminals = 2.14 g; no weight is stated.
 
 ## Catalogue models
 
@@ -56,4 +86,6 @@
 | Legs | 0.4 thick, 8.2 apart, up to 1.07 wide, narrowing to 0.59 at the tip | 0.4 thick, 8.2 apart, 1.2 wide, barbs 1.5 |
 | Actuator position | between terminals 1 and 2 (position 1) | drawn in position 2 |
 
+The old `SW E-Switch EG1224 SPDT Angled` and `SW E-Switch EG2219 DPDT Angled` models name these exact parts, so they map to EG1224 and EG2219. Measured on the reference models (2026-11-06), they match the drawings: body 13.8 x 6.5 x 8.5; actuator 5.0 x 4.0 on a 5.5 axis, 9.0 out with a 0.5 step (4.0 x 4.0 there); terminals 0.5 x 0.4 on 4.0, rows 1.75 from the back legs (EG2219 2.5 apart); legs 0.8 x 0.5, 12.0 by 6.0; 3.5 below the board. Their body lower edge is between 1.0 and 1.4 above the board, against EG1224's drawn 1.5, and their actuator sits in position 1.
+
 The family's other switches (DIP switches, tactile switches and other makers' switches) are other parts. See `COVERAGE.md`.