Geometrical instruments – Area integrators – Electrical
Patent
1975-08-11
1976-12-14
Cherry, Johnny D.
Geometrical instruments
Area integrators
Electrical
294 1R, 294103R, B25B 900, G01B 322
Patent
active
039966674
ABSTRACT:
A rigid base with an integral post projecting thereabove between its ends has a tubular slideway formed through the post and the bottom of the base. A cylindrical slide is reciprocable in the slideway and has a picker finger secured to its bottom with opposite tapered ends projecting under the adjacent portions of the bottom of the base. A screw is threadedly engaged in a tapped bore in the top of said slide, and has a head on its upper end exteriorly of said post. The head is restrained against axial movement relative to said post. A slot formed vertically through the side of said post slidably receives a pin connected to said slide to prevent rotation of the slide. Said pin also serves as an indicator. A manually engageable handle is formed integrally with said base and said post.
REFERENCES:
patent: 196976 (1877-11-01), Hill
patent: 1040078 (1912-10-01), Widen
patent: 1553387 (1925-09-01), McDermott
patent: 1737764 (1929-12-01), Jacobs
patent: 2799939 (1957-07-01), Bivans
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