Gear cutting – milling – or planing – Milling – Including means to adustably position cutter
Patent
1996-08-07
1998-08-18
Pitts, A. L.
Gear cutting, milling, or planing
Milling
Including means to adustably position cutter
8352219, 8352221, 1441171, 144116, 144131, 359438, 408 16, 408116, 409214, 409218, 451 6, B23C 112
Patent
active
057951136
ABSTRACT:
An optical unit for projecting an image including first and second locating lines for substantially eliminating the introduction of visual parallax error. In one preferred form, the optical unit is incorporated into a machine for performing a forming operation on a workpiece and is operative to project an image of a portion of a scale to a position easily read by the user during machine operation. The optical unit includes a prism portion having a first side disposed adjacent the scale, a second side at an angle to the first side for reflecting the image and a third side through which the projected image may be viewed. The first locating line is disposed on the first side and the second locating line is disposed on the third side such that visual alignment eliminates the introduction of visual parallax error associated with reading a scale.
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F. Schedewie, M. Kallmeyer, B; Solf, D. Wagner: "Ein neues elektrooptisches Kantenfindermikroscop fur die Halbleitertechnologie" Internationale Elektronische Rundschau, vol. 25, Apr. 1971, p. 93 XP002046125 *figure 1*.
Welsh Robert P.
Wixey Barry D.
Black & Decker Inc.
Kirkman Christopher
Pitts A. L.
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