Overrunning protection for a grinding wheel

Details Overrunning protection for a grinding wheel Overrunning protection for a grinding wheel

1977-04-19

1979-03-20

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

B24B 4718

Patent

active

041446771

ABSTRACT:
Overrunning protection for a grinding machine comprising a grinding wheel mounted in a head stock. The head stock is supported on a frame for movement in a direction toward and away from a work rest for a work piece at one end of the frame and a drive for rotating the grinding wheel. The drive is operable to rotate the grinding wheel at a first angular velocity and a second lower angular velocity. The overrunning protection consists of a blocking member operable between a first position permitting engagement of the drive to rotate the grinding wheel at the first angular velocity and a second position permitting engagement of the drive to rotate the grinding wheel at the lower angular velocity. A first sensor senses the position of the blocking member and a second sensor senses the position of the head stock in relation to the grinding position of the work piece at the work rest. The sensors are operatively connected to the drive to control the same in a predetermined manner so that the drive is actuated only if the first sensor senses the blocking member in the second position or if the first sensor senses the blocking member in the second position or if the second sensor senses the head stock in a predetermined position relative to the work piece.

REFERENCES:
patent: 1982483 (1934-11-01), Ritz
patent: 2642703 (1953-06-01), Flygare
patent: 3129534 (1964-04-01), Miyabayashi
patent: 3656262 (1972-04-01), Kikuchi
patent: 3673741 (1972-07-01), Koide

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