Geometrical instruments – Area integrators – Electrical
Patent
1974-07-01
1976-10-26
Aegerter, Richard E.
Geometrical instruments
Area integrators
Electrical
33143L, 33147N, 33172E, G01B 712, G01B 702
Patent
active
039875520
ABSTRACT:
Two embodiments of an electronic measuring gage are disclosed, each suitable for the visual display of a workpiece dimension. A grinder gage of one embodiment has a single movable measuring probe with both coarse and fine travel components. The measuring probe is mounted on an inner coaxial shaft which is fitted within a sleeve-like outer coaxial shaft. The outer coaxial shaft is slidably mounted in the grinder gage housing for coarse travel and carries the inner shaft and measuring probe with it. The inner shaft is adapted for fine travel relative to the outer shaft, and resilient connection means are provided for connecting the two shafts. One element of an Inductosyn position-measuring transducer is fixed to the inner coaxial shaft and the other element is fixed to the grinder gage housing. A base probe and a positioning probe are also mounted in the housing to maintain the measuring probe and base probe colinear with a diameter of a round workpiece to be measured.
A second embodiment similarly shows a measuring gage having two coaxial shafts arranged within a housing to measure a workpiece dimension between a measuring probe fixed to one end of the inner coaxial shaft and a reference point in fixed spaced relation to the housing. The second embodiment also includes a releasable pushbutton element which ensures that the measuring probe exerts a constant, predetermined force upon the surface of the workpiece during measurement, thereby facilitating uniformity of measurement.
REFERENCES:
patent: 1992606 (1935-02-01), Darlington
patent: 3293759 (1966-12-01), Moe et al.
patent: 3354553 (1967-11-01), Heldmaier
patent: 3781997 (1974-01-01), Pagella et al.
patent: 3802087 (1974-04-01), Raiteri
Aegerter Richard E.
Downing John L.
Inductosyn Corporation
Stearns Richard R.
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