Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1988-10-31
1990-04-03
Hartman, Judy
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
5116577, B24B 4900
Patent
active
049128841
ABSTRACT:
Automatic calibration equipment for planar grinding machines comprises a measuring head (12) fixed to a table (4) of the associated grinding machine for measuring the distance between this table and the grinding wheel (6), and an electronic measuring and control apparatus (14) for receiving the output signal of the measuring head and producing signals controlling the forward and rearward movement of the grinding wheel. The measuring head comprises a pneumatic circuit with a first branch of very low internal volume provided with an inlet nozzle and a measurement outlet nozzle (48) oriented to blow towards the edge of the grinding wheel, a second branch provided with an inlet nozzle and a reference nozzle, means for connecting the inlet nozzles of these branches to an installation (18) delivering compressed air at regulated pressure, and a pressure-differential transducer with a semi-conducting element for detecting the difference between the pressures in the two branches.
REFERENCES:
patent: 3704557 (1972-12-01), Peonski
patent: 3862517 (1975-01-01), Porter, Jr.
patent: 4538449 (1985-09-01), Wegmann et al.
Hartman Judy
Meseltron S.A.
Rachuba Maurina
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