Geometrical instruments – Miscellaneous – Light direction
Patent
1977-01-17
1978-07-25
Aegerter, Richard E.
Geometrical instruments
Miscellaneous
Light direction
33174D, G01B 302
Patent
active
041020499
ABSTRACT:
A device for measuring the grip size of a human hand to determine the proper size of a sporting implement handle such as found on a tennis racket or the like, the device comprising a rigid, transparent planar surface, said surface having indicia disposed thereupon showing the outline of a human hand, and indicia showing a measurement scale on a straight line measured from the tip of the ring finger toward the central palm area of the inscribed human hand. A zero reference line may be disposed adjacent the tip of the ring finger with the measurement described being disposed between the ring finger and middle finger. Additional indicia marks showing representative palm crease lines may be included on the planar surface. A proper grip size for use with a tennis racket or other sporting implement is found by measuring the distance from the tip of the ring finger to the straight line intersection of the second or lower palm crease which in most palms, is the longer crease line, disposed near the central portion of the palm. The device is employed by placing the hand within the human indicia outline and registering the tip of the ring finger of a human hand with the indicia human hand outline, observing the measurement scale intersection between the actual second or middle crease of the hand observed through the transparent device with the hand pressed thereagainst. The device may include indicia outlines and measurement scales for both left and right hands.
REFERENCES:
patent: 1372732 (1921-03-01), Wodrich
patent: 1703273 (1929-02-01), Hoban
patent: 2326030 (1943-08-01), Hearn
patent: 2605548 (1952-08-01), Clarke
patent: 3238628 (1966-03-01), Snakard
Aegerter Richard E.
Shepperd John W.
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