Pocket alarm

Details Pocket alarm Pocket alarm

1990-05-10

1991-04-09

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340669, 340573, G08B 1500

Patent

active

050068326

ABSTRACT:
A portable alarm includes a light circuit having in series a normally closed first relay contact and a light, an alarm circuit having in series an impact switch and an alarm, a manual switch in series with each of the light circuit and the alarm circuit for activating the light circuit and setting the alarm circuit to a ready position, the impact switch being operable upon impact to turn the alarm on when the alarm circuit is in the ready position, an alarm maintenance circuit connected in series with the alarm circuit, a relay in series with the impact switch, the relay being operable to open the normally closed first relay contact and to activate the alarm maintenance circuit, and a power source for the light, alarm and alarm maintenance circuits.
Once the portable alarm is set to the ready position a light goes on. A severe jolt to the pocket alarm and thus the impact switch turns the light off and activates an alarm. The alarm can only be switched off by using a recessed switch.

REFERENCES:
patent: 3579221 (1971-05-01), Ashley et al.
patent: 3634885 (1972-01-01), Barkley
patent: 3725890 (1973-04-01), Cirino
patent: 4110741 (1978-08-01), Hubert et al.
patent: 4158197 (1979-06-01), Takagaki
patent: 4262285 (1981-04-01), Polley
patent: 4404549 (1983-09-01), Berg
patent: 4479114 (1984-10-01), Yamamoto
patent: 4520351 (1985-05-01), Altman et al.

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