Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1986-02-25
1991-02-05
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular system function
340505, 340518, 34082506, 340541, 340547, 340545, 340693, 439387, G08B 2900, G08B 2600
Patent
active
049908880
ABSTRACT:
A security alarm system includes a transponder having a housing enclosing both a sensor and associated circuit means in a unitary package. The housing base includes barrel-shaped connectors, and a pc board carrying the communications components is carried by the housing cover. Flag-like connectors mate with the barrel-shaped connectors when the cover is attached to the base, and the connectors give both good mechanical indexing and retention, and effective electrical contact. Removal of the cover from the base breaks the electrical contact and thus breaks continuity back to the system controller, indicating someone has tampered with the system.
REFERENCES:
patent: 2916733 (1959-12-01), Hirsch
patent: 3544987 (1970-12-01), McMann, Jr. et al.
patent: 3833895 (1974-09-01), Fecteau
patent: 4138674 (1979-02-01), Humphries
patent: 4148019 (1979-04-01), Durkee
patent: 4367458 (1983-01-01), Hackett
patent: 4410229 (1983-10-01), Stephenson
patent: 4498723 (1985-02-01), Johnston
patent: 4542372 (1985-09-01), Takach, Jr.
Noonan Leonard
Seeley John E.
Vogt William R.
Baker Industries Inc.
Crosland Donnie L.
Jennings James J.
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