String clamp for racquet stringing machine

Details String clamp for racquet stringing machine String clamp for racquet stringing machine

1988-09-26

1989-10-17

Grieb, William H.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

24516, 269166, 269169, A63B 5114

Patent

active

048741701

ABSTRACT:
A toggle action string clamp for a racquet stringing machine comprises two vise members movable along positioning glide bars attached to the stringing machine, which can be locked to the bars and to the strings of a racquet positioned in the machine. An angular link member connects a bottom vise member to a clamp-locking handle, with the top vise member being located therebetween. Locking is achieved by forcing the bottom U-shaped portion of the handle against a locking pin contained in the top vise member, thereyby urging the two vise members together. The clamp is provided with a wedge block mechanism capable of adjusting the effective distance between the bottom of the U-shaped portion and the bottom vise member, thus controlling the clearance between the vise members and, therefore, the clamping force. In the open position, due to the interaction of the clamp handle, clamp gap pings and vise member springs, the vise members open up at both ends simultaneously, facilitating positioning on the glide bars, or their complete removal.

REFERENCES:
patent: 4156525 (1979-05-01), Parnell
patent: 4546977 (1985-10-01), Bosworth, Jr. et al.

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