Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1979-12-03
1982-04-27
Apley, Richard J.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
A63B 5116
Patent
active
043267130
ABSTRACT:
A racket stringing machine having a racket head holding fixture and a carriage mounted for reciprocation toward and away from the fixture and a string clamp mounted on the carriage for engaging a string drawn through a racket head mounted on the fixture for tensioning the string upon movement of the carriage away from the fixture; a first brake which is automatically set upon drawing of the string to an elevated tension greater than the desired final predetermined tension to effect a pre-stretching of the string to a length beyond its length at such predetermined tension while permitting a decrease in the string tension; and a second brake which is automatically set to lock the string at the desired final predetermined tension. The apparatus also includes means for providing a controlled restrained rate of increase in string tension and a controlled restrained rate of decreasing string tension at tensions between the predetermined tension and maximum tension. Means is also provided for adjusting the amount of pre-stretching of the string.
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patent: 2091654 (1937-08-01), Roberts et al.
patent: 2154870 (1939-04-01), Serrano
patent: 3441275 (1969-04-01), Held
patent: 3823609 (1974-07-01), Miyagawa et al.
patent: 3918713 (1975-11-01), Kaminstein
patent: 3994495 (1976-11-01), Stoffel
Apley Richard J.
Chickering Robert B.
Grunewald Glen R.
Warren Manfred M.
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