Title: Contour grinders

Abstract: A contour grinder having a grinding wheel that forms a workpiece into a desired contour by directly controlling the movement of the grinding wheel with a motor operated by numerical control. The grinding wheel has an arched shaped surface on the periphery thereof. The grinder also includes a vertical shaft about which the grinding wheel is rotatable and a support arm which carries a horizontal shaft to which the grinding wheel is fixed. The support arm is rotatably connected to a portion of the vertical shaft and connects the horizontal shaft at a right angle thereto so that the center of the arched surface on the periphery of the grinding wheel is aligned with the center of the vertical shaft. The vertical shaft is rotatable about its axis and movable longitudinally and laterally and the grinding wheel is movable with the vertical shaft. The vertical shaft is hollow and a microscope, marked with reference lines for inspecting the shape of the periphery of the grinding wheel and the position of the workpiece to be ground by the grinding wheel, is mounted in the hollow shaft.

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Inventors: Tokunaga, Yoshio (Higashikurume, JA)
Shinano, Keizo (Mitaka, JA)

Application Number: 512930
Filing Date: 1974-10-07
Publication_date: 1976-03-09
Assignee: Citizen Watch Company, Ltd. (Tokyo, JA)
Primary Class(es): 451/4 451/5, 451/72, 451/127, 451/135, 451/913
Other Classes:
US Patent Ref:

1045243	Nov, 1912	Zeitz	51/43.
1500963	Jul, 1924	Speegle	51/43.
1674673	Jun, 1928	Williams	51/43.
1817405	Aug, 1931	Braren	51/DIG.
3105413	Oct, 1963	Lanzenberger	51/43.
3118254	Jan, 1964	DiLella	51/45.
3289355	Dec, 1966	Coburn	51/33.

Other Refs:
Primary Examiner: Kelly, Donald G.
Assistant Examiner:
Attorney: Stevens, Davis, Miller & Mosher