Bowling ball gauge

Details Bowling ball gauge Bowling ball gauge

1979-03-09

1981-01-06

Little, Willis

Geometrical instruments

Area integrators

Electrical

273 63B, G01B 525

Patent

active

042428017

ABSTRACT:
A gauge to measure and to indicate the divergence of the axis of a bore in a bowling ball from a radius of the bowling ball. This enables the orientation of grip holes in one bowling ball to be measured so they can faithfully be reproduced in another bowling ball. The gauge includes a reference plate which is to be pressed against the outside of the ball, a plug pivoted to the reference plate which enters a bore and expands so as to bear against its inside wall to align the plug, and a pointer mounted to the plug which, with a scale on the reference plate, indicates the relationship between the bore and the radius of the bowling ball. This in formation enables one to set up a drilling machine to reproduce this hole in another ball.

REFERENCES:
patent: 2706338 (1955-04-01), Ackerman et al.
patent: 3389475 (1968-06-01), Sapelak
patent: 3392453 (1968-07-01), Snoddy

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