H - Electricity – 04 – M
Patent
H - Electricity
04
M
340/187, 379/95,
H04M 1/515 (2006.01) H01H 13/70 (2006.01)
Patent
CA 1134084
TITLE PUSHBUTTON CALL TRANSMITTER ABSTRACT OF THE DISCLOSURE A calling device usable in telephone sub- scribers' instruments to selectively close a set of contacts upon the depression of one of a plurality of upwardly biased pushbuttons. The device is adapted to be assembled modularly and includes an integrated switching module arranged as an unitary assembly. A plurality of one piece spring and contact members within the switching module serve to restore each pushbutton and provide a single "make" contact with an included contact strip whenever an individual push- button is depressed. Formed wiper contact ends of each spring and contact member and contact strip, electrically connect to a circuit board which is disposed to engage a rear face of the switching module. The front face accepts a faceplate and pushbutton assembly which is keyed to the switching module and is easily removed and replaced without disassembling the entire calling device.
341852
Gte Automatic Electric Laboratories Incorporated
R. William Wray & Associates
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