Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1981-04-13
1984-03-27
Marlo, George J.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
273 58K, A63B 3900
Patent
active
044389248
ABSTRACT:
A spheroidal projectile with an aerodynamically roughened surface in the nature of intersecting grooves which give a high density of roughness elements. The grooves range in size between grooves of about 0.01 inch wide and deep, spaced about 1/32 of an inch apart for a "fine" degree of roughness to grooves which are 1/16 of an inch wide and deep, and spaced 1/16 of an inch. The projectile has a mass sufficiently low so that when launched at transltional and rotational speeds obtainable by hand, Magnus forces are enhanced by the roughness, and anti-Magnus forces are made to appear by this appropriate degree of roughness, the result of which is a trajectory with pronounced multiple curves. In accordance with the preferred embodiment, a surface speed of rotation of 8 feet per second is desirable and a ball of 15 grams having a 3 inch diameter would have a spin of about 10 revolutions per second. An acceptable ballistic (or linear) launch speed for the ball is about 55 feet per second.
REFERENCES:
patent: 697417 (1902-04-01), Kempshall
patent: 1265036 (1918-05-01), Bendelow
patent: 1684557 (1928-09-01), Saunders
patent: 2135210 (1938-11-01), Farrar
patent: 2683603 (1954-07-01), Gackenbach
patent: 2776139 (1957-01-01), Blamey et al.
patent: 3115129 (1963-12-01), Merriman
patent: 3819190 (1974-06-01), Nepela et al.
patent: 3908993 (1975-09-01), Gentiluomo
patent: 3908994 (1975-09-01), Astrom
patent: 3917271 (1975-11-01), Lemelson et al.
patent: 3927881 (1975-12-01), Lemelson et al.
patent: 4045026 (1977-08-01), Gillespie et al.
patent: 4142727 (1979-03-01), Shaw et al.
patent: 4184682 (1980-01-01), Collins et al.
patent: 4256304 (1981-03-01), Smith et al.
patent: 4266773 (1981-05-01), Treadwell
"Capital City Federal Home Owner", Jul.-Aug. 1972, Published by Capital City Federal Savings & Loan Association of Washington, D.C. p. 15.
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