Interlock arrangement for radiopager switches

Details Interlock arrangement for radiopager switches Interlock arrangement for radiopager switches

1985-09-18

1986-12-16

Scott, J. R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

455 78, H01H 926, H04B 144

Patent

active

046298371

ABSTRACT:
An interlock arrangement for two slide switches in a radio pager eliminates incorrect switch operation. The casing contains two switches (A and B) with respective switch members (15, 16) located inside the casing. Switch member (15) has a cam follower (15b) on a resilient arm which co-operates with one or the other of two indents (13, 14). Switch member (16) has a chamfered end (16a). The chamfered end (16a) and the cam follower (15b) are shaped so that when switch member (15) is in position 1, the other switch member (16) locks switch member (15). If switch member (15) is inadvertently operated toward position 2, the chamfered end (16a) of switch member (16) will abut against the undersurface of the resilient arm cam follower (15b) thereby forcing the cam follower into more positive engagement with indent (13). Each switch (A or B) has two positions. In order for the interlock arrangement to be effective, each switch member must be located in the same position, for example position 1 or position 2.

REFERENCES:
patent: 3290454 (1966-12-01), Hubert
patent: 3470339 (1969-09-01), Roman
patent: 3784765 (1974-01-01), Daly
patent: 4115670 (1978-09-01), Chandler
patent: 4147904 (1979-04-01), Carpenter et al.
patent: 4322588 (1982-03-01), Chumley et al.
patent: 4461033 (1984-07-01), Todo

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