Signals and indicators – Alarms – Burglar
Patent
1976-09-20
1977-12-13
Yasich, Daniel M.
Signals and indicators
Alarms
Burglar
49 13, 116 86, G08B 1308
Patent
active
040623149
ABSTRACT:
A signaling device for use with a closure which is movably mounted within a frame having a housing, and a vibratile member mounted on the housing. A striker pin is mounted on the housing. A biasing spring is disposed about the pin and tends to maintain the striker pin at an intermediate rest position spaced from the vibratile member. A magnet is adapted for mounting in movable relation to the housing in accordance with the movement of the closure, for magnetically holding the striker pin in a retracted striking position spaced from the vibratile member when the closure is disposed in a pre-selected position in the frame, and for releasing the striker pin to permit the striker pin to overcome the biasing force of the spring and strike the vibratile member when the closure is moved away from the pre-selected position. The device may also include a second magnet adapted for mounting in movable relation to the housing in accordance with the movement of the closure, for positively forcing the striker pin into the vibratile member when the closure is moved away from its pre-selected position in the frame.
REFERENCES:
patent: 2600581 (1952-06-01), Schenendorf
patent: 2735397 (1956-02-01), Bishop
patent: 3451373 (1969-06-01), Fox et al.
patent: 3516036 (1970-06-01), Lea
patent: 3890476 (1975-06-01), Canter
Allen Shelby A.
Black Neville R.
Miller Jr. Maurice L.
Morris Charles Nick
Yasich Daniel M.
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