Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1991-06-17
1992-11-24
Ng, Jin F.
Communications: electrical
Condition responsive indicating system
Specific condition
200 6173, 340691, G08B 1308, H01H 316
Patent
active
051666650
ABSTRACT:
A self-contained audible alarm assembly settable for actuation when subjected to an axial compressive force. The alarm assembly comprises a cylindrical body and a pair of end caps each comprising a circular base and an annular skirt. A first end cap is mounted on a first end of the body. A sound producing horn is captively mounted within the body adjacent the first end cap, the base of which is perforated to emit sound from the horn. A battery is located within the body. A pair of contacts is mounted within the body adjacent the second end thereof. Each contact has a portion extending slightly beyond the body second end. The battery and the horn are connected in series between these contacts. An electrically conductive disc is affixed to the inside surface of the base of the second one of the end caps. The disc touches the contacts completing the circuit and energizing the horn when the second end cap is fully seated on the second body end. Guide elements on the second end cap and on the body define an intermediate position for the second end cap wherein it is mounted on the second end of the body but not fully seated thereon. The guide means further define a position of the second end cap wherein the end cap may be shifted to its fully seated position by a compressive force to complete the circuit and energize the horn.
REFERENCES:
patent: 4888578 (1989-12-01), Conemac
patent: 4896139 (1990-01-01), Eldridge
Mullen Jr. Thomas J.
Ng Jin F.
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