Tarpaulin alarm system

Details Tarpaulin alarm system Tarpaulin alarm system

1996-09-26

1998-06-09

Lefkowitz, Edward

Communications: electrical

Condition responsive indicating system

Specific condition

340426, 340571, B60R 2510

Patent

active

057641447

ABSTRACT:
A tarpaulin alarm system triggered by unsnapping a tarpaulin attachment snap from a snap member includes a hollow housing on which the snap member is mounted and a Hall effect sensor arranged proximate the snap member on a printed circuit board contained within the housing for cooperation with a magnet associated with the attachment snap. The housing is preferably cylindrical in shape for easy mounting in a drilled hole. The printed circuit board is connected to a switched power source external to the housing, and may be wired to a suitable alarm indicator, such as an existing horn. The circuitry includes an oscillator-based timer for providing a delay period after triggering during which the system may be reset by re-attaching the attachment snap to the snap member.

REFERENCES:
patent: 4222032 (1980-09-01), Speer
patent: 4253084 (1981-02-01), Topputo
patent: 5051744 (1991-09-01), Ewart
patent: 5486812 (1996-01-01), Todd
patent: 5572186 (1996-11-01), Traxler et al.

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