Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1993-03-25
1995-10-03
Peng, John K.
Communications: electrical
Condition responsive indicating system
Specific condition
340542, G08B 1308
Patent
active
054555620
ABSTRACT:
A passive home security meter indicator which will show the returning occupant(s) at the front entrance whether or not the front door has been opened and security status compromised. If a security status has been compromised, a D'arsonval Meter Movement will show a repetitive sweeping meter indication visible at the front entrance. This equipment operates on 120 VAC commercial power through an AC ADAPTER as primary power. A set of 4 regular "D" size alkaline flashlight battery and a 6 volt alkaline lantern battery are used as 200% back-up power. For a 5 to 10 hour day operation, a set of 14 ampere-hour (a-h) alkaline flashlight battery may last 5 to 10 months while a 27 a-h alkaline lantern battery may last 9.5 to 19 months. The life expectancy of these batteries is typically from three to four years when a 12 VDC AC ADAPTER is used as primary power. An instantaneous automatic power changeover circuit is incorporated to allow the power failures of the primary power along with one of the two back-up battery powers to occur simultaneously or sequentially without interrupting the normal operation of the equipment. This equipment can safely operate with as little as 6 milliamperes on a 6 volt DC power source of supply.
REFERENCES:
patent: 3658676 (1972-04-01), De Vittorio et al.
patent: 3833895 (1974-09-01), Fecteau
patent: 4422068 (1983-12-01), Helft
patent: 4427975 (1984-01-01), Kinzie
patent: 4763937 (1988-08-01), Sittnick, Jr. et al.
patent: 4990898 (1991-02-01), Greene
patent: 5087908 (1992-02-01), Sanders, Jr. et al.
Lee Benjamin C.
Peng John K.
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