Measuring and testing – With fluid pressure – Dimension – shape – or size
Patent
1985-12-23
1987-11-10
Eley, Timothy V.
Measuring and testing
With fluid pressure
Dimension, shape, or size
29714, 33DIG2, 73151, G01B 1300
Patent
active
047048964
ABSTRACT:
An air gage assembly for testing for the presence of threads in holes in a workpiece or for the presence of the holes per se. The assembly includes a hollow housing open at one end and closed at the other end; an elongated probe assembly; means pivotally mounting the probe assembly in the housing in a location intermediate the ends of the probe assembly with one free end of the probe assembly positioned within the hollow of the housing and the other free end positioned outside of the housing; means for supplying air to the hollow of the housing; and means for passing the air centrally through the probe assembly for discharge through the other free end of the probe assembly and against the threaded or unthreaded wall of the hole to be tested. A thrust piston engages the free end of the probe assembly within the housing and a Hall effect transducer positioned in the housing adjacent the free end of the probe assembly detects both axial and wobble movement of the probe assembly indicative respectively of the lack of the hole in the workpiece or a broken or bent probe tool. A control unit associated with the probe assembly receives linear output signals from the probe assembly and analyzes these signals to provide information with respect to the presence or absence of a thread in the bore; the presence of a bore; a broken or bent probe tool; or failure of the overall system.
REFERENCES:
patent: 2479606 (1949-08-01), Douglass
patent: 2618964 (1952-11-01), Byrkett
patent: 2618965 (1952-11-01), Gray
patent: 2669864 (1954-02-01), Brewster
patent: 3438244 (1969-04-01), Plumpe, Jr.
patent: 3792605 (1974-02-01), Rabenau
patent: 3793875 (1974-02-01), Jurkiewicz
patent: 4034478 (1977-07-01), Yager
patent: 4437335 (1984-03-01), Gates
D-Tec, Inc.
Eley Timothy V.
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