Push button switch

Details Push button switch Push button switch

1988-12-01

1990-05-29

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200517, 200553, 200339, 338114, H01H 2180, H01H 1312, H01C 1010

Patent

active

049298046

ABSTRACT:
A push button switch which may be used, for example, as a zooming switch in a video camera, having a uniform electrical resistance/applied pressure characteristic and which can be manufactured easily and at a low cost. The switch includes a conductive layer and a pressure-sensitive resistance element disposed between electrode patterns provided on a printed circuit board and an insulated push button. The conductive layer is coated with a pressure-sensitive conductive paste and the pressure-sensitive resistance element is fixed to the insulated push button at a opposed surface to the electrode patterns separated by a predetermined distance.

REFERENCES:
patent: 3728509 (1973-04-01), Shimojo
patent: 3860771 (1975-01-01), Lynn et al.
patent: 3879576 (1975-04-01), DuRocher et al.
patent: 4324472 (1982-04-01), Terada et al.
patent: 4378478 (1983-03-01), Deeg
patent: 4491702 (1985-01-01), Kato
patent: 4499342 (1985-02-01), Nakayama
patent: 4654488 (1987-03-01), Westfall
patent: 4687200 (1987-08-01), Shirai
patent: 4775574 (1988-10-01), Fukushima et al.
patent: 4794366 (1988-12-01), Sakamoto
patent: 4818827 (1989-04-01), Ipcinski et al.

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