Dial tampering detector

Details Dial tampering detector Dial tampering detector

1990-07-19

1991-10-22

Shoap, Allan N.

Signals and indicators

Indicators

Rotary indicator with actuating means

116200, 116300, 324110, G01D 1300, G09F 1102

Patent

active

050585258

ABSTRACT:
A method for detecting tampering with a dial of a utility meter is used with a meter of the type including at least one rotary dial having angularly spaced circumferentially arrayed indicia and an indicator, the indicator and said indicia being relatively rotatable by a gear train having at least one gear which rotates in unison with the dial in operation. The method includes emcoding the gear with a code which corresponds in a predetermined fashion with the indicia of the dial and anotating on the meter a predetermined key to the initial correspondence of the code with the relative position of the dial indicator. The invention extends to an apparatus for carrying out the foregoing method.

REFERENCES:
patent: 4490672 (1984-12-01), Signorelli
patent: 4588949 (1986-05-01), Becker et al.
patent: 4749938 (1988-06-01), Bishop

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