Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1986-05-20
1987-11-17
Pinkham, Richard C.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
269227, 269238, A63B 5114
Patent
active
047069554
ABSTRACT:
A racket stringing machine comprises a support frame, a tension head assembly, a lateral clamp head and a longitudinal clamp head. Movement of the tension head assembly is controlled by a brake motor which is controlled by the signals transferred from a limit switch. The limit switch is normally pressed by a contact element and released when a string clamp head pivoted on the tension head assembly is spring biassed to pivot away from the clamping frame and a contact element fixed on the string clamp head is separated from the limit switch. The lateral clamp head comprises two lateral clamp arms for clamping the lateral sides of a racket frame to be strung by a pivotal movement accomplished by an actuating block sliding along a rotating bolt. The longitudinal clamp head comprises a clamping sheet with a rack extending downward from the bottom surface for meshing with a sector gear so as to be rotated by a handle in order to clamp the upper surface of the racket frame.
REFERENCES:
patent: 2109740 (1938-03-01), Carlborg
patent: 2380661 (1945-07-01), Marsilius
patent: 2961900 (1960-11-01), Stanton et al.
patent: 3441275 (1969-04-01), Held
patent: 4620705 (1986-11-01), Tsuchida
Chu David T.
Ngadi Sumiaty
Pinkham Richard C.
Schneider Matthew L.
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