Portable alarm device for entryway motion monitoring

Communications: electrical – Condition responsive indicating system – Specific condition

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200 6193, 340546, 340548, G08B 1308

Patent

active

054898900

ABSTRACT:
A generally rectangular housing defines an interior cavity therein. A conventional battery powered alarm circuit is supported within the interior cavity. A supporting suction cup is securable to the housing to permit attachment of the housing to a convenient surface. The housing defines an elongated slot in proximity to the circuit battery and a pair of spring contacts are provided for completing the battery power circuit connection to the alarm circuitry. An insulating tab is receivable within the alarm housing through the slot and extends between one of the spring contacts and its associated battery terminal to interrupt the battery power to the alarm circuit. The insulative tab is coupled to a second suction cup by a flexible line. The alarm system is installed by positioning the alarm housing and the second suction cup on opposite sides of a movable door or window portion. The alarm is triggered as the second suction cup is moved drawing the insulative tab outwardly from the alarm housing and permitting the completion the battery power circuit to the alarm circuit.

REFERENCES:
patent: 882570 (1908-03-01), Liaci
patent: 3175207 (1965-03-01), Hewitt, Jr.
patent: 3427608 (1969-02-01), Green
patent: 4149156 (1979-04-01), Blasucci
patent: 4205305 (1980-05-01), Nakada
patent: 4206452 (1980-06-01), Blasucci
patent: 4222042 (1980-09-01), Cantley
patent: 4284982 (1981-08-01), Downey
patent: 4292629 (1981-09-01), Kerr et al.
patent: 4533904 (1985-08-01), Steinman, Jr.

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