Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Combined
Patent
1981-10-15
1984-09-04
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Combined
310339, G01R 2900, H01L 4108
Patent
active
044700105
ABSTRACT:
Retrofit apparatus (38) for attachment to a utility meter (10) to detect revolutions of a dial arm (34) of the utility meter. A piezoelectric crystal (42) is provided against which a striker arm (52) abuts. The striker arm is rotatable on an axle (50) and is therefore movable relative to the piezoelectric crystal. A spring (54) is tensioned so as to resiliently bias the striker arm against the crystal. A shoe (62) is also mounted on the axle and is disposed in the path of rotation of the dial arm so that once each revolution the dial arm engages, deflects, and releases the shoe, thereby causing the striker arm to withdraw from and then snap back against the piezoelectric crystal. The crystal produces an electrical pulse in response. The pulses are counted by a counter (82) to provide a count indicative of utility usage.
REFERENCES:
patent: 498372 (1893-05-01), Ward
patent: 2447588 (1948-08-01), McNairn
patent: 2691159 (1954-10-01), Heibel
patent: 3333111 (1967-07-01), Houle
patent: 3813597 (1974-05-01), LeVitt
patent: 3835372 (1974-09-01), Adair
patent: 4379245 (1983-04-01), Goldstein
Snow Walter E.
Strecker Gerard R.
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