Counter mechanism for continuous measurements, particularly dist

Details Counter mechanism for continuous measurements, particularly dist Counter mechanism for continuous measurements, particularly dist

1975-02-20

1976-02-03

Jackmon, Edith Simmons

Registers

Odometers

73490, 116114, 235103, G01C 2200, G01P 302, G01D 1308, G06M 124

Patent

active

039359964

ABSTRACT:
A counter mechanism for the digital measurement of increments of a selected physical quantity, such as distance travelled by a motor vehicle, includes a first set of numbered counting wheels rotatably mounted in sequence upon a driven shaft with gear means interconnecting said counting wheels one with another in a velocity ratio of 1 to 10, and a second set of numbered counting wheels similarly arranged on a second shaft driven from a predetermined one of said numbered counting wheels in said first set. The second set of counting wheels commences to count multiples of said increments when said predetermined one counting wheel commences to rotate. The second set of numbered counting wheels can be reset to zero by means of a ratchet resetting device without affecting the position of the first set of numbered counting wheels. Such a mechanism is useful as a mileage recorder in the speedometer of a motor vehicle, the second set of numbered counting wheels serving as a direct visual indication to an observer of the mechanism of an attainment of a predetermined number of miles covered by the vehicle, which predetermined number correlates to a mileage limit for servicing, for example, a catalytic exhaust gas system on the vehicle. Preferably electrical contact means on the second set of counting wheels actuates a visual or audible warning signal once said predetermined number of miles is reached. Once the vehicle has been reserviced, the second set of numbered counting wheels is returned to zero to start indicating the second corresponding mileage limit.

REFERENCES:
patent: 1195494 (1916-08-01), Nichols
patent: 3054558 (1962-09-01), Frenchtel
patent: 3856195 (1974-12-01), Kakizaki

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