Alarm for a blind

Details Alarm for a blind Alarm for a blind

1986-08-20

1988-07-19

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

340541, 340545, 340550, G08B 1300

Patent

active

047588241

ABSTRACT:
An alarm device, suitable for use with venetian blinds and other retractable blinds and curtains, comprises, secured together as a single unit, a piezoelectric motion sensor, an amplifier circuit electrically connected to the piezoelectric sensor to amplify signals generated in the sensor, an audible alarm electrically connected to the amplifier circuit for activation by the amplified signals, and a source of electrical power for the circuit and the audible alarm. In one embodiment described, the unit is built upon a printed circuit board and is of such shape and dimensions as to fit in the bottom rail of a venetian blind.

REFERENCES:
patent: 3605087 (1971-09-01), Nine
patent: 3668582 (1972-06-01), Lea
patent: 4160972 (1979-07-01), La Mell et al.
patent: 4281320 (1981-07-01), Rosenberg
patent: 4636775 (1987-01-01), Burgess et al.

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