Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1992-03-09
1993-02-16
Millin, V.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
A63B 5114
Patent
active
051865050
ABSTRACT:
An improved chucking device for a racket stringing machine is mounted on the chucking arm of the racket stringing machine. The chucking arm comprises a sliding track located at the place where the chucking device is mounted and two lugs extending downward from the bottom surface thereof and by both sides of the sliding track. Each chucking device comprises a sliding block having a predetermined number of arresting holes, a clamping block disposed on the sliding block to fasten a racket frame, a pivotal member having a threaded hole, a threaded rod inserted into the threaded hole of the pivotal member in an inclined manner so that it urges against the arresting hole of the sliding block, and a torsion spring located between the pivotal member and the lugs so as to permit the threaded rod to keep urging against the arresting hole. A racket frame can be fastened or released rapidly by relieving the threaded rod of the action of urging against the arresting hole so that the sliding block is allowed to slide rapidly.
REFERENCES:
patent: 3988022 (1976-10-01), Halbrook
patent: 4417729 (1983-11-01), Morrone
patent: 4706955 (1987-11-01), Ngadi et al.
patent: 4846474 (1989-07-01), Chiang
patent: 5090697 (1992-02-01), Lee
Millin V.
Stoll William E.
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