Height control device and method for a fixture for machining an

Details Height control device and method for a fixture for machining an Height control device and method for a fixture for machining an

1988-11-22

1990-07-24

Massie, IV, Jerome W.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

181123, 299 39, 404 84, 404 90, E01C 2308, G01S 1508, G01S 1588

Patent

active

049431196

ABSTRACT:
A height control device for a fixture which comprises at least a pair of gauging devices each having an ultrasonic transceiver for gauging a certain distance. A signal generator is connected to both gauging devices for generating a signal representative of the change in the level height due to machining. A control device is also provided for elevating or lowering the machining fixture.

REFERENCES:
patent: 3158945 (1964-12-01), Curlett et al.
patent: 3414327 (1968-12-01), Austin
patent: 3720818 (1973-03-01), Spragg et al.
patent: 4213719 (1980-07-01), Swisher, Jr. et al.
patent: 4750584 (1988-06-01), Tanaka et al.

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