Geometrical instruments – Gauge – Screw thread
Patent
1989-02-21
1990-06-19
Cuchlinski, Jr., William A.
Geometrical instruments
Gauge
Screw thread
33545, G01B 336
Patent
active
049340590
ABSTRACT:
A gauge and gauging method for measuring a thread of varying pitch by screwing a threaded gauge element into engagement with the thread of varying pitch and to a point at which the threads have a light binding relationship resisting further advancement of the threads together. The device is constructed to then indicate the extent to which the gauge element has advanced when the binding condition is attained, and utilize that reading as a measurement of the functional accuracy of the thread of varying pitch. The device preferably includes a second element which, when the threads are in their lightly binding condition, is adjustable axially relative to the threaded gauge element and to a position of contact with the part containing the thread of varying pitch. Markings indicating the relative positioning of the two elements then provide a precise measurement of the functional accuracy of the thread of varying pitch. For initially calibrating the markings, some of the markings may be formed on a part which is rotatably adjustable to a zero setting or other reference setting.
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"The MTG System of Internal Gaging", published by MTG, Inc. in 1981, pp. 1 through 12.
"TRI-ROLL Thread Comparators and Thread Roll Snap Gages", published by Southern Gage Co., Jun. 1979, pp. 1 through 12.
Cuchlinski Jr. William A.
Fulton Christopher W.
Green William P.
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