Constant torque multiple drum counter

Details Constant torque multiple drum counter Constant torque multiple drum counter

1976-07-09

1977-10-04

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

235 92EA, 235 92R, 235133A, 73386, G06M 118, G01L 712

Patent

active

040525970

ABSTRACT:
An auxiliary force-applying mechanism is connected to a counter type altimeter for applying a supplemental force to rotate its counter mechanism at the time a Geneva type mechanism advances a second drum by one indicator position. The force applied to the drum mechanism is approximately equal to the additional force required to advance the second drum through the Geneva mechanism so that a relatively constant load is applied to the altimeter driving mechanism such as an aneroid capsule. In a second embodiment, a constant auxiliary force is applied to the altimeter drum and this relatively constant auxiliary force is relieved during the time that the Geneva mechanism advances a second drum by one drum position so that a relatively constant force is applied to the aneroid capsule. An electronic circuit is provided for actuating the auxiliary force-applying mechanism and contains photosensing circuit means which actuates at the time that the Geneva mechanism becomes operative for moving a second drum, and the photosensing elements are arranged relative to slots in a drum rim.

REFERENCES:
patent: 2973145 (1961-02-01), Daniels et al.
patent: 3047225 (1962-07-01), Grafstein
patent: 3154948 (1964-11-01), Andresen
patent: 3548166 (1970-12-01), Sebastian
patent: 3619587 (1971-11-01), Chambers
patent: 3778600 (1973-12-01), Burton
patent: 3875376 (1975-04-01), Kakeno
patent: 3916185 (1975-10-01), Jehly

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