Turns-counting dial

Details Turns-counting dial Turns-counting dial

1975-07-18

1976-11-16

Watkins, Donald E.

Signals and indicators

Alarms

Fluid flow

235103, 338149, G01P 1300

Patent

active

039917029

ABSTRACT:
A turns-counting dial for multi-turn potentiometers and the like, and having an intermittent-motion mechanism connecting a shaft-mounted control knob to a turns-counting ring. An interrupted-tooth gear coupled to the turns-counting ring is locked against rotation except during turns-counting movement by a flange on a coupling ring positioned radially inwardly of the gear within the dial. This arrangement provides secure locking of the turns-counting dial, provides flexibility in the number of turns to be counted, enables use of relatively low-tolerance parts, and strengthens the intermittent-motion mechanism against breakage or distortion if torque is applied to the turns-counting ring.

REFERENCES:
patent: 904332 (1909-11-01), Kahan
patent: 2805636 (1957-09-01), Smith
patent: 3162172 (1964-12-01), Hardison
patent: 3757732 (1973-09-01), Frey, Jr.

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