Precise indexing detent

Details Precise indexing detent Precise indexing detent

1975-03-03

1976-06-01

Martin, Jr., William D.

Geometrical instruments

Straight-line light ray type

Vertical angle

33 1D, 33174TB, G01C 100

Patent

active

039598888

ABSTRACT:
A precise indexing detent comprises a pair of grooved members the plane groove faces of which define a polyhedron within which there may be positioned a sphere in surface contact with all such faces. A detent member comprising a spherical section is situated in close association with the grooved members to govern the positional indexing of movable apparatus parts as in a level-transit surveying instrument or drafting machine protractor head.

REFERENCES:
patent: 1047220 (1912-12-01), Heinrich
patent: 2485846 (1949-10-01), Sanderson

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