Electrical indicator including relatively translatable scale and

Details Electrical indicator including relatively translatable scale and Electrical indicator including relatively translatable scale and

1977-05-20

1978-06-27

Rolinec, Rudolph V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Balancing

116135, G01R 1706, G09F 900

Patent

active

040977994

ABSTRACT:
An electrical indicator is disclosed of the type including a housing with an elongated window therein, and an elongated scale and an adjacent, relatively-translatable index carried on an elongated tape loop, both viewable through the window. The indicator provides increased resolution over such indicators known to the prior art by placing the elongated scale also on a tape which is made translatable past the window but in a direction opposite to that of the tape carrying the index. Both tapes are driven by the same drum forming part of a DC torque motor, but are taken off a peripheral surface of that drum in opposite directions to achieve opposite translations of the tapes past the window. An electrical circuit for controlling the DC torque motor is disclosed, as are details of the DC torque motor and associated components of the electrical indicator.

REFERENCES:
patent: 3182631 (1965-05-01), Gomes
patent: 3187713 (1965-06-01), Fenwick

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