Geometrical instruments – Area integrators – Electrical
Patent
1986-09-25
1987-11-10
Stearns, Richard R.
Geometrical instruments
Area integrators
Electrical
331795B, 331795C, G01B 728
Patent
active
047047992
ABSTRACT:
A method is provided for compensating for master gear error in a gear checking apparatus employing a preselected master gear and a fixture for mounting a test gear to be checked in mesh with the master gear. The method comprises mounting a test gear in mesh with the master gear, rotatably driving one of the master and test gears, and producing a test signal corresponding to the differential movement between the master gear and test gear during rotation caused by imperfections or irregularities in both of the gears. The method proceeds by processing the test signal to form a plurality of individual error values, each corresponding to engagement of a given tooth of the master gear with several teeth of the test gear, developing a series of mean values, each corresponding to the mathematical mean of all of the error values developed with respect to a single master gear tooth during engagement thereof with each of the test gear teeth, and utilizing each of said mean values as a correction factor to compensate for master gear error. An apparatus is also provided for carrying out the foregoing method.
REFERENCES:
patent: 3352023 (1967-11-01), Budnick
patent: 3851398 (1974-12-01), Hilburger
patent: 4272891 (1981-06-01), Fusari
patent: 4488359 (1984-12-01), Misson
patent: 4550508 (1985-11-01), Spaeth
Buckman Thomas V.
Illinois Tool Works Inc.
O'Brien John P.
Stearns Richard R.
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