Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Meter protection or fraud combatting
Patent
1982-09-30
1985-09-17
Tokar, Michael J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Meter protection or fraud combatting
340566, 340568, G01R 100
Patent
active
045423377
ABSTRACT:
An apparatus for indicating electric meter tamper is disclosed having a switch provided with normally closed contacts in the nature of an enclosed race having a central inner contact and a plurality of spaced outer contacts operating in conjunction with a conductive, magnetic ball disposed in the race such that when the ball is in a stable position one of the outer contacts is electrically connected to the center contact and when the ball is disturbed from a stable position the circuit is temporarily opened. The system further includes an actuator device responsive to the opening of the normally closed contacts and an indicator device responsive to the actuator device to indicate the opening of contacts which marks the meter or otherwise signals a tampering incident. Thus, the system is sensitive to changes in position of the meter, vibration and/or magnetic fields, which are sufficient to cause said contacts to temporarily open.
REFERENCES:
patent: 846624 (1907-03-01), Saunders
patent: 2056494 (1936-10-01), Tucker, Jr. et al.
patent: 3962696 (1976-06-01), Smith
patent: 4039943 (1977-08-01), Tapscott
patent: 4150371 (1979-04-01), Scaglione
patent: 4297683 (1981-10-01), Roberts
Honeywell Inc.
Mersereau Charles G.
Tokar Michael J.
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