Howard W Dammel

41236424, Oct 31, 1978

Dec 13, 1976

5/749905

Howard W. Dammel - Cincinnati OH
Robert M. Frantz - Milford OH
James H. Luke - Loveland OH
William G. Skrzypczyk - Harborcreek PA

Cincinnati Steel Treating Company - Cincinnati OH
General Electric Company - Erie PA

H05B 508

219 1059

Apparatus for obtaining full tooth width induction hardening of gear teeth. The method comprises attaching gear teeth shaped non-magnetic material templates to the opposite sides of the gears in close proximity to but spaced from the sides of the gear teeth. The gear teeth are then progressively induction hardened by passing a current intensifier between the aligned teeth of the templates and the gears while maintaining current flow to the intensifier for the full width of travel of the intensifier between the gear teeth. In the preferred embodiment the faces and roots of the templates are slightly undersize relative to the faces and roots of the gear teeth and the tops of the teeth of the template are slightly oversize and extend beyond the tips of the teeth of the gear.

40267326, May 31, 1977

Aug 28, 1975

5/608630

Howard W. Dammel - Cincinnati OH
Robert M. Frantz - Milford OH
James H. Luke - Loveland OH
William G. Skrzypczyk - Harborcreek PA

Cincinnati Steel Treating Co. - Cincinnati OH
General Electric Company - Erie PA

C21D 118

148154

A method and apparatus for obtaining full tooth width induction hardening of gear teeth. The method comprises attaching gear teeth shaped non-magnetic material templates to the opposite sides of the gears in close proximity to but spaced from the sides of the gear teeth. The gear teeth are then progressively induction hardened by passing a current intensifier between the aligned teeth of the templates and the gears while maintaining current flow to the intensifier for the full width of travel of the intensifier between the gear teeth. In the preferred embodiment the faces and roots of the templates are slightly undersize relative to the faces and roots of the gear teeth and the tops of the teeth of the template are slightly oversize and extend beyond the tips of the teeth of the gear.