The PMC Model CS 402 Cam Switch
combines in a compact 1-1/16" diameter unit all the functions of a
conventional plate cam, cam follower and snap-action switch. External
screwdriver adjustments permit rapid setting of any desired switch make
angle. Designed for timing, indication, control, computation and other
applications where snap action switching is required, it permits the
instrument and servo designer to meet specific application requirements
through use of a single component that can be mounted in a gear assembly
in a manner similar to synchros, potentiometers and other rotating shaft
components. Because the CS 402 Cam Switch replaces conventional cam
mechanisms, independently mounted switches and their associated hardware,
it provides significant savings in design, fabrication and assembly time.
Its small size permits significant improvements in miniaturization of the
end product.
Adjustment of the CS 402 Cam
Switch can be accomplished rapidly and precisely while the shaft is either
stationary or rotating, by means of two external adjusting screws, and can
be completed within seconds. As a result, it provides a unique means for
‘trimming-in’ required performance in production or during equipment
maintenance. Conveniently located locking screws maintain switch settings
underall conditions of shock and vibration encountered by military
equipment. Model CS 402 Cam Switches incorporate standard type SPDT,
subminiature, snap switches and are available as single-switch units, or
as multi-ganged types with as many as 10 switches. Both single and
multi-stack types can be supplied with double-ended shaft for mounting
dial or indicator. All types meet applicable requirements of MIL-E-5400.
Complete mechanical and electrical specifications are given below. |
|
|
| Part
No. |
No.
Of
Switches |
Dim.
"L"
(In.,
Max.) |
Inertia
(OZ. IN.
SEC.2) |
WT.
(OZ.) |
|
Part
No. |
No.
Of
Switches |
Dim.
"L"
(In.,
Max.) |
Inertia
(OZ. IN.
SEC.2) |
WT.
(OZ.) |
| CS402-1 |
1 |
.800 |
0.6x10-5 |
1.4 |
CS402-6 |
6 |
3.300 |
3.7x10-5 |
5.0 |
| CS402-2 |
2 |
1.300 |
1.2x10-5 |
2.1 |
CS402-7 |
7 |
3.800 |
4.3x10-5 |
5.7 |
| CS402-3 |
3 |
1.800 |
1.8x10-5 |
2.8 |
CS402-8 |
8 |
4.300 |
4.9x10-5 |
6.5 |
| CS402-4 |
4 |
2.300 |
2.5x10-5 |
3.5 |
CS402-9 |
9 |
4.800 |
5.5 x10-5 |
7.2 |
| CS402-5 |
5 |
2.800 |
3.1x10-5 |
4.3 |
CS402-10 |
10 |
5.300 |
6.1x10-5 |
8.0 |
|
SPECIFICATIONS
ELECTRICAL
RATINGS
115/230 vac 5 amp, inductive and resistive
30 vdc
resistive, sea level 5.0 amp
resistive, 50,000 ft 5.0 amp
inductive, sea level 3.0 amp
inductive, 50,000 ft 2.5 amp
Max. Inrush 24 amp |
MECHANICAL
DATA
Shaft rotates on precision ball bearings
Shaft End Play 003 in., max.
Shaft Pilot Runout 001 in., max., T.I.R.
Temperature Range -65ºF to +250ºF
Make-Break Differential 1.0º max.
Operating Torque 1.0 oz.-in., max., per switch (see note) |
NOTE: peak torque occurs at switch
actuation. With all switches in a multi-switch unit set to identical
on-off positions, the total maximum torque will not exceed n x 1.0 oz-in.,
(where n is the number of switches in the stack). With different switch
settings the total maximum torque may be as low as 0.5 x n x 1.0 oz-in.,
depending upon the specific on-off settings. |
VARIATIONS
FOR PARTICULAR REQUIREMENTS
Precision Mechanisms Corporations will be pleased to quote on variations
for the CS 402 Cam Switch for special requirements. Readily available
variations include:
A) non-standard shaft extension
B) double-ended shaft extension
C) ultra low differential switches
D) multi-switch units mounted in gear train mechanisms for specific
switching
functions, with or without motor drive |
