Clock construction, Geneva clutch therefor and methods of making

Details Clock construction, Geneva clutch therefor and methods of making Clock construction, Geneva clutch therefor and methods of making

1985-11-12

1987-01-06

Miska, Vit W.

Horology: time measuring systems or devices

Display trains

368222, G04B 1902

Patent

active

046342893

ABSTRACT:
A clock construction, a Geneva clutch therefor and methods of making the same are provided, the clock construction comprising a frame, a drive unit carried by the frame, a time indicating unit carried by the frame, and a Geneva clutch carried by the frame and operatively interconnecting the drive unit to the time indicating unit so that the drive unit can drive the time indicating unit in a timed sequence thereof, the clutch comprising a shaft rotatably carried by the frame, a pair of leaf springs each having opposed ends with a longitudinal axis therebetween, one of the opposed of each leaf spring being fixed to the shaft so that the leaf springs rotate in unison therewith, and a Geneva pinion rotatably disposed on the shaft and having a multi-sided section engaged by the leaf springs to tend to cause the shaft to rotate in unison with the pinion about an axis of rotation as the pinion is being rotated by the drive unit, the leaf springs each having the longitudinal axis thereof disposed substantially transverse to the axis of rotation of the shaft and the pinion. The other opposed ends of the leaf springs extending in opposite directions relative to each other.

REFERENCES:
patent: 3899872 (1975-08-01), Flumm et al.
patent: 3931705 (1976-01-01), Iwaki et al.
patent: 4005570 (1977-02-01), Miyamoto et al.
patent: 4057959 (1977-11-01), Insley et al.
patent: 4175373 (1979-11-01), Miyamoto et al.

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