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A sliding selector switch is positionable to one of four discrete positions and actuates a diaphragm switch at each position.
English (United States)
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Sliding Selector Switch
A sliding selector switch is positionable to one of four discrete positions and
actuates a diaphragm switch at each position.
The switch comprises four parts: a casing 11, slider 13, switch board 15 and
operational handle 17. Casing 11 is formed of metal and performs several
functions. The detents 21, formed on the top surface, detent the slider to each of
four discrete positions, and tabs (not shown) locate the switch and attach it to the
switch board 15. The plastic slider 13 acts as a leaf spring to force its detent
bumps 23 into the casing detents 21, and its actuator surface 25 effects switch
closure. The bottom edges 27 of the slider balance it when it is moved forward
or backward by the operator.
The switch board 15 is a multilayer assembly containing a rigid substrate 30
with conductive tracks (not shown) thereon, a thin flexible spacer insulating layer
32 located thereon, and a flexible membrane 33 with conductive material on the
side facing the spacer 32. Force from the actuating surface 25 of slider 13 on the
nonconductive side of flexible membrane 33 causes the conductive surface
thereon to make contact with the conductive track on the substrate 32 through an
opening 34 in the insulating layer 32, thereby generating an electrical signal.
A rotary switch can be made utilizing the same type of components but
causing the actuator to rotate about a central pivot rather than sliding in a linear