Cricket switch

Details Cricket switch Cricket switch

1983-08-08

1985-07-23

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Actuated concurrently with operation or use of art device

200 6181, 340545, H01H 316

Patent

active

045310297

ABSTRACT:
An automatically resetting alarm switch includes a casing which may be mounted into a stationary frame of a window or other closure. The casing has a side opening through which a contact head protrudes. The contact head is connected to an internally located trip lever which, in turn, is in contact with a microswitch. A solenoid having a plunger also is disposed within the casing. The plunger is capable of shifting the trip lever. The contact head is coupled frictionally to a sliding surface of the closure. Upon movement of the closure, the contact head is moved which causes the microswitch to trigger a remotely located alarm device. The solenoid also is activated and the resultant movement of the plunger resets the contact head in readiness for sending another alarm signal.

REFERENCES:
patent: 465602 (1881-12-01), Thompson
patent: 1455763 (1923-05-01), Werner
patent: 2436470 (1948-02-01), Fleming
patent: 2600581 (1952-06-01), Schenendorf
patent: 2734123 (1956-02-01), Gerber
patent: 2924682 (1960-02-01), Winterburn
patent: 3091760 (1963-05-01), Spenard et al.
patent: 3571544 (1971-03-01), Sheehan
patent: 3710369 (1973-01-01), Takahashi
patent: 4057773 (1977-11-01), Cohen

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