Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1982-06-24
1984-04-10
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
200 6193, 292339, 340521, 340686, G08B 1308
Patent
active
044424272
ABSTRACT:
A portable door lock and combined smoke and intrusion alarm has an upper forked end engageable with the door handle, a shaft extending in an adjustable length tube and terminating in a non-skid rubber end adapted to engage the floor or carpet. The upper end of the shaft is further retained in its mounted position by a retaining ring or cord. It has its lower end lying in a plane substantially aligned with the longitudinal axis of the shaft. A dual function alarm device is slidably mounted on the shaft and includes an actuator for it with a switch contact normally abutting or close to abutment with the surface of the door at a point below the door handle. Responsive to inward movement and pressure on the door the alarm will be actuated. At the same time, the locking action of the shaft and the upper forked end will divert the opening inward forces into forces directed against the floor so that the door cannot be opened. The alarm device is also actuable by an electrically controlled smoke alarm mounted adjacent to it.
REFERENCES:
patent: 1695686 (1928-12-01), Hess
patent: 2870281 (1959-01-01), Mitchell
patent: 4036518 (1977-07-01), Jost
patent: 4136899 (1979-01-01), Frasher
patent: 4139845 (1979-02-01), Washburn
patent: 4176870 (1979-12-01), Cracraft
patent: 4258359 (1981-03-01), McLamb
Dumont Harry R.
Swann III Glen R.
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