Head for bore gauge

Details Head for bore gauge Head for bore gauge

1981-07-31

1983-12-13

Little, Willis

Geometrical instruments

Area integrators

Electrical

33178E, 33147K, 33149J, 33143L, G01B 508, G01B 712

Patent

active

044198299

ABSTRACT:
A head assembly is provided for use in a bore gauge and is adapted to actuate either a mechanical readout, such as a dial indicator, or an electrical readout, such as a linear variable differential transformer connected to a digital display. A U-shaped centralizing arm pivoted to the head body is provided with a pair of floating centralizing ball contacts. A first measuring ball contact is mounted at the outer end of a rack and pinion extensible stem adapted to be adjusted as to radial extension and a second measuring ball contact is mounted on a resiliently mounted finger which drivingly engages a transfer rod. The transfer rod is operatively connected to the readout device whether a dial indicator or an LVDT. A ball and groove driving arrangement is provided between the transfer rod and the pivotal finger.

REFERENCES:
patent: 1671168 (1978-05-01), Steinle
patent: 2424497 (1947-07-01), Nilsson
patent: 2565844 (1951-08-01), Eisele
patent: 2930134 (1960-03-01), Bishop et al.
patent: 3103748 (1963-09-01), Emery
patent: 3418720 (1968-12-01), Worthen
patent: 3422540 (1969-01-01), Worthen
patent: 3442020 (1969-05-01), Worthen
patent: 3762057 (1973-10-01), Kaifesh
patent: 3995374 (1976-12-01), Fisk
patent: 4030202 (1977-06-01), Fadl et al.
patent: 4045877 (1967-09-01), Rutter
patent: 4170831 (1979-10-01), Olasz

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