Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1988-03-25
1989-05-02
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200 50C, 200523, H01H 926
Patent
active
048270873
ABSTRACT:
A push button switch with a simultaneous locking preventing function which can attain its miniaturization while realizing a sure single action. The switch includes a core mounted for sliding movement in each of a pair of sliders mounted for up and down movement in a casing. A heart-shaped cam groove having a plurality of regions of varying height is formed either on an end face of each core or with the locking region of the cam groove formed on an end face of each core and with the remaining regions formed on a contiguous wall face of the corresponding slider. An actuator pin is provided for each slider and traces the cam groove to lock the slider at its depressed position when the slider is depressed. When the sliders are depressed simultaneously, a simultaneous locking preventing member prevents the sliders from being locked at the depressed positions. The simultaneous locking preventing member has a pair of cam faces formed at opposite ends thereof for moving, when one of the sliders is depressed, the core corresponding to the other slider so that the corresponding actuator pin is released from locking by the corresponding heart-shaped cam groove to allow the other slider to be returned to the home position, making an interlocking action.
REFERENCES:
patent: 4392029 (1983-07-01), Schaad et al.
patent: 4584897 (1986-04-01), Sharp, Jr.
patent: 4636601 (1987-01-01), Tanabe
Nagai Hidenori
Niinuma Akira
Alps Electric Co. ,Ltd.
Malaska Stephen L.
Scott J. R.
Shoup Guy W.
Winters Paul J.
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