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Патент USA US2128762

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Aug. 30, 1938.
w. A. WEI-:D '
y
GRINDING MACHINE
Filed Aug. 17, 1957
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2,128,762
2,128,762
it is turned upon the shaft, the short portion of
the cam remaining out of engagement With the
operating element when the inner unit is in~
verted and. turned upon the shaft, said short
portion serving to guide the operating element
back upon the long portion of the cam, means
3
to move the inner unit in an opposite direction
to the movement eiîected by the cam, an outer
unit for coaction with the inner unit, and means
to draw the outer unit toward the inner unit.
WALTER A. WEED.
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