Communications: electrical – Condition responsive indicating system – With particular coupling link
Reexamination Certificate
2005-09-06
2005-09-06
Tweel, Jr., John (Department: 2636)
Communications: electrical
Condition responsive indicating system
With particular coupling link
C340S538000, C340S506000
Reexamination Certificate
active
06940404
ABSTRACT:
An RF converter circuit11that constitutes a video signal superposing/power deriving unit100converts video signals generated from images taken by a surveillance camera10, which derives a direct current voltage as a driving power from an antenna lead-in wire6through a filter circuit (LPF circuit12), to radio-frequency signals. The radio-frequency signals are transmitted through the antenna lead-in wire6to a television receiver2. Images taken by the surveillance camera1can be viewed on the television receiver2only by selecting the channel assigned to the surveillance camera1. Accordingly, the driving power for the surveillance camera1is not relied upon a solar battery or secondary batteries, and wiring work therefor may be simplified.
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Nagao Mitsuyoshi
Sato Hidenori
Murakami Corporation
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Tweel , Jr. John
LandOfFree
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