Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1977-07-25
1979-04-24
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
With particular system function
340546, 340574, G08B 1308, G08B 1500
Patent
active
041515200
ABSTRACT:
An alarm device is provided comprising a portable housing having an audio alarm positioned therein and a battery powered electronic circuit for activating the alarm. The circuit comprises a battery, an arming switch, a triggering switch, an audio alarm, and a latching circuit and oscillator circuit utilizing an integrated circuit therein. The circuit also includes a means for connecting auxiliary devices thereto and a means for coupling an AC adapter. A magnetically operated reed switch and a mechanically operated pull switch comprise the normally open triggering switch. The triggering switch also contains means for adapting any activator wired normally open to the triggering switch. The oscillator circuit drives the audio alarm whenever any of the triggering switches are closed and the latching circuit maintains the oscillator in an operating mode.
REFERENCES:
patent: 2228120 (1941-01-01), Koehler
patent: 3683346 (1972-08-01), Horton
patent: 3771154 (1973-11-01), Takei
patent: 3803576 (1974-04-01), Dobrzanski et al.
patent: 4030087 (1977-06-01), Ritchie et al.
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