Education and demonstration – Physical education – Basketball
Patent
1984-12-18
1986-01-21
Skogquist, Harland S.
Education and demonstration
Physical education
Basketball
273 15A, 273371, A63B 6900
Patent
active
045655278
ABSTRACT:
A sensing frame is positioned so that a basketball will pass through a rectangular shaped opening in the sensing frame when a free throw shooter shoots the basketball towards a goal. The sensing frame has a beam of light directed across it above the top of the desired path of the basketball for the basketball to enter the goal and a second beam of light directed across it below the desired path of the basketball to enter the goal. If either of these beams of light is broken, different alarm signals indicate to the shooter whether the path of the basketball is high or low. The sensing frame is adjustable both vertically and about a horizontal axis to enable the desired positioning of the sensing frame relative to the shooter.
REFERENCES:
patent: 3094330 (1963-06-01), Smith
patent: 3097303 (1963-07-01), Ulrich
patent: 3105685 (1963-10-01), Jahn
patent: 3229975 (1966-01-01), Tompkins
patent: 4021036 (1977-05-01), Nelson
patent: 4023798 (1977-05-01), Pronin
patent: 4212116 (1980-07-01), Hajduch
Elizabeth M. Mortimer, "Basketball Shooting", pp. 234-243 of the Research Quarterly for May 1951.
Leach, Jr. Frank C.
Skogquist Harland S.
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