Electric appliance fault monitor and indicator
First Claim
1. Apparatus for monitoring the voltage applied to an electrical appliance and for visually signalling a drop in said voltage below a predetermined acceptable threshold to a location remote from said appliance comprising, in combination:
- (a) means electrically coupled to a voltage supply for said appliance for sensing when the amplitude of the voltage from said voltage supply has fallen below said predetermined acceptable threshold;
(b) a power source independent and electrically isolated from said appliance voltage supply; and
(c) xenon flash lamp means operatively coupled to said means for sensing and to said independent power source for providing an intense flash of light visible at great distances at predetermined intervals, so long as the amplitude of the voltage of said voltage supply remains below said predetermined acceptable threshold.
2 Assignments
0 Petitions
Accused Products
Abstract
A monitor and indicating circuit for an electric appliance detects the absence of the energization voltage for the appliance exceeding a predetermined threshold and provides a brilliant flash from a xenon lamp which is visible from great distances. The circuitry is contained within a sealed housing and includes a self-contained battery supply and attachable to a fence post. The circuit employed is specifically designed to conserve battery power by controlling the flash frequency and the charging time for the storage capacitor used with the xenon flash tube.
42 Citations
16 Claims
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1. Apparatus for monitoring the voltage applied to an electrical appliance and for visually signalling a drop in said voltage below a predetermined acceptable threshold to a location remote from said appliance comprising, in combination:
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(a) means electrically coupled to a voltage supply for said appliance for sensing when the amplitude of the voltage from said voltage supply has fallen below said predetermined acceptable threshold; (b) a power source independent and electrically isolated from said appliance voltage supply; and (c) xenon flash lamp means operatively coupled to said means for sensing and to said independent power source for providing an intense flash of light visible at great distances at predetermined intervals, so long as the amplitude of the voltage of said voltage supply remains below said predetermined acceptable threshold. - View Dependent Claims (12, 13, 14, 15, 16)
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2. Apparatus for visually signalling malfunctioning of an electric fence having posts, said electric fence being of the type in which at least one continuous length of fence wire is strung between post mounted insulators and is periodically energized by high voltage pulses generated by a fence voltage supply capable of administering a non-lethal shock to animals coming into contact therewith, the combination comprising:
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(a) means affixed to ones of said posts at predetermined intervals along the fence line for sensing when the amplitude of said high voltage pulses has fallen below a predetermined acceptable threshold; (b) a power source independent and electrically isolated from said fence voltage supply; and (c) xenon flash lamp means operatively coupled to said means for sensing and to said independent power source for providing an intense flash of light visible at great distances at predetermined intervals so long as the amplitude of said high voltage pulses remains below said predetermined acceptable threshold. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification