Push button switch assembly with interlocking element

Details Push button switch assembly with interlocking element Push button switch assembly with interlocking element

1996-11-13

1999-11-30

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200 5E, 200 5036, H01H 926, H01H 1312

Patent

active

059946520

ABSTRACT:
A push-button switch of simple structure and highly reliable operation capable of safely stopping equipment even when the push button of the push-button switch fails to return to its normal position while the push-button switch for operating equipment is being operated. And a push-button switch device capable of easily judging the presence or not of any failure of the push-button switch for operating the equipment by using that push-button switch. In a pushbutton switch in which the push button is provided, in a way to be available for pressing down in resistance to a spring for returning the push button, on a breaker plate provided with a fixed contact for an operating circuit and a fixed contact for a verification circuit, the push button is composed of push button body and auxiliary push button body slidably disposed against the push button body, the push button body is provided with a mobile contact for the operating circuit and the auxiliary push button body is provided with a mobile contact for the verification circuit respectively, and the push button body is urged in the returning direction with a spring for returning the push button body.

REFERENCES:
patent: 2579168 (1951-12-01), Ballou
patent: 3271530 (1966-09-01), Wirsching
patent: 3519766 (1970-07-01), Mackway
patent: 4088855 (1978-05-01), Emery
patent: 4095059 (1978-06-01), Nishioka et al.
patent: 4122316 (1978-10-01), Iwasaki et al.
patent: 5321311 (1994-06-01), Umemura et al.
patent: 5382836 (1995-01-01), Umemura
patent: 5473203 (1995-12-01), Umemura
patent: 5576525 (1996-11-01), Umemura
patent: 5646382 (1997-07-01), Moriya

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