Automatic synchronized pitch controls for pairs of driver and dr

Details Automatic synchronized pitch controls for pairs of driver and dr Automatic synchronized pitch controls for pairs of driver and dr

1974-10-21

1976-06-22

Scott, Samuel

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

180 62, 74722, F16H 5552, B62D 1102

Patent

active

039643271

ABSTRACT:
In a vehicle or the like, a source of power is connected to a drive shaft. Two pairs of pulley halves are splined to this shaft and can be moved apart and together and are rotated by the shaft. Driven shafts also carry pairs of pulley halves which are splined thereto and can be moved therealong and belts extend between corresponding pulley halves on the drive shaft and corresponding pulley halves on the driven shafts. A pair of spur gears are journalled for partial rotation and mesh with one another, there being one pair for each two sets of pulley halves and a third drive gear engages between the innermost gears of said spur gears so that movement of this drive gear causes equal and simultaneous rotation of the spur gears. Levers are secured to the spur gears and are operatively connected to the pulley halves so that when the drive gear is rotated, one of the sets of pulley halves are moved apart on one of the shafts whereas the other set are moved together by equal amount and vice versa. This permits belts extending between the sets of pulley halves to increase or decrease the speed of the driven shafts. The drive gear is connected to a steering mechanism and with the driven shaft being connected to the drive wheels on each side of the vehicle, easy and accurate steering is accomplished by speeding up one set of drive wheels and decreasing the speed of the other and vice versa. A winch assembly is connected to the drive shaft by a similar arrangement thus enabling the speed of the winch to be controlled accurately which is of particular importance when the winch is being used to disengage the vehicle from mud, snow or the like under which circumstances the winch speed can synchronize exactly with the speed of the drive wheels so that both the winch and the drive wheels can assist in extracting the vehicle from the mired position.

REFERENCES:
patent: 1890975 (1932-12-01), Erdahl
patent: 2529489 (1950-11-01), Curtis
patent: 3343621 (1967-09-01), Doorne
patent: 3572454 (1971-03-01), Siren
patent: 3715928 (1973-02-01), Case et al.
patent: 3743043 (1973-07-01), Gelinas
patent: 3871461 (1975-03-01), Ehrlich

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