Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1975-06-25
1977-03-22
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
5116574, 73 67, B24B 4910
Patent
active
040128709
ABSTRACT:
A method of measuring and, where necessary, modifying the natural vibration frequency of a metal bar, more especially a ferromagnetic bar, comprising freely suspending the bar in a constant magnetic field, subjecting the bar to action from outside to make it vibrate and detecting the resulting vibration frequency. There is also provided apparatus for carrying out the method, which comprises a vertical insulating cylinder, at the center of which the bar is kept freely suspended by a pneumatic device, means intended to make the bar vibrate, a solenoid which establishes a constant magnetic field and at the terminals of which the vibration frequency of the bar is detected, and a selective amplifier connected to the terminals of the solenoid.
REFERENCES:
patent: 2320390 (1943-06-01), Shmurak
patent: 2340843 (1944-02-01), Bailey
patent: 2782633 (1957-02-01), Stauss
patent: 3095532 (1963-06-01), Floyd
patent: 3121955 (1964-02-01), King
patent: 3250119 (1966-05-01), Roberts
patent: 3345862 (1967-10-01), Rowe
patent: 3488674 (1970-01-01), Simjian
patent: 3580056 (1971-05-01), Warner
Beaudet Didier M.
Berniere Michel G.
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