Portable security alarm

Details Portable security alarm Portable security alarm

1982-08-16

1985-09-10

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

340546, 340593, 340594, 340628, 340691, 340693, 374205, G08B 1706, G08B 1710, G08B 1308

Patent

active

045409803

ABSTRACT:
A portable room security alarm features a smoke detector alarm, a motion sensing intrusion alarm, a temperature sensing alarm, and a digital display alarm clock. The security alarm includes a deployable thermally conducting mounting clip for mounting the alarm at the top of a door with the clip extended to pass around the upper edge of the door. A deployable temperature sensor probe may be attached to the clip to give early warning of a fire outside the door. The temperature probe may alternatively be attached to other metallic structures passing through the door frame, e.g. door knobs, hinges, etc. Large ventilating apertures in an extensible telescoping housing allow access of smoke to the smoke sensor, and with the housing closed the sensor is sealed off against long term contamination.

REFERENCES:
patent: 2552331 (1951-05-01), Lamb
patent: 2816280 (1957-12-01), Detweiler
patent: 3555532 (1971-01-01), White et al.
patent: 3878539 (1975-04-01), Gooding
patent: 4178592 (1979-12-01), McKee
patent: 4186389 (1980-01-01), Flittie
patent: 4284981 (1981-08-01), Black
patent: 4438428 (1984-03-01), Ober et al.

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