Geometrical instruments – Area integrators – Electrical
Patent
1976-03-02
1977-06-14
Aegerter, Richard E.
Geometrical instruments
Area integrators
Electrical
33178F, 176 19R, G01B 300, G21C 1700, G01B 512
Patent
active
040288110
ABSTRACT:
Spring-loaded plungers are arranged about a housing for insertion into a polygonal tube, one plunger for each side of the tube. Each plunger has a locking cam and sliding wedge mechanism which can overcome the spring force associated with the plunger and lock it in any position. The wedges are operated by a rod moveable axially in the housing. Several housings with their associated plungers can be stacked. The stack is lowered into the polygonal tube with all of the plungers locked in a fully inward position. When the stack is in the tube, each wedge is moved to release its locking cam, allowing each of the plungers to spring outward against an inner side of the tube. Each housing will thus gage the internal dimensions of the tube at its elevation. The plungers are locked in position, the entire stack is rotated to bring the plungers into the corners described by the intersections of the flat sides, and the stack is removed from the tube whereupon the dimensions across opposite locked plungers may be read by a micrometer.
REFERENCES:
patent: 2679107 (1954-05-01), Gondek
patent: 3039198 (1962-06-01), Motley
patent: 3250013 (1966-05-01), Bell
Hutter Ernest
Tuma Leroy A.
Aegerter Richard E.
Carlson Dean F.
Hosteny Joseph N.
Jackson Frank H.
Stearns Richard R.
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