Michael L Cory

US Patent:

46852026, Aug 11, 1987

Filed:

Jan 13, 1986

Appl. No.:

6/818217

Inventors:

Dwight E. Booth - Janesville WI
Michael L. Cory - Beloit WI

Assignee:

Dana Corporation - Toledo OH

International Classification:

H01F 4102

US Classification:

29607

Abstract:

A method of forming non-magnetic barriers in the coupling disc (e. g. , the armature or rotor) of an electromagnetic coupling such as a clutch or brake. The method is carried out by moving the disc relative to a laser beam which cuts a slot through the disc. In one embodiment, the slot is filled throughout its entire length by non-magnetic material, the filling being effected by continuously advancing a non-magnetic wire toward the laser beam to cause the wire to be melted by the beam and to flow into the newly formed slot. In another embodiment, the wire is advanced intermittently to form short non-magnetic bridges beween relatively long slots.

US Patent:

47774630, Oct 11, 1988

Filed:

Sep 25, 1987

Appl. No.:

7/101379

Inventors:

Michael L. Cory - Clinton WI
Donald W. Dean - Rockton IL

Assignee:

Dana Corporation - Toledo OH

International Classification:

H01F 720

US Classification:

335289

Abstract:

A fixture for locating a workpiece in a precisely established position comprises a lower magnetic base and an upper fixture plate, the workpiece being fixtured on the plate. The base includes a permanent magnet which normally clamps the plate to the base but which is disabled and releases the plate when an electromagnet in the base is energized. Prior to clamping the plate to the base, the plate is located in a precise edgewise position on the base by quickly insertable and removable dowel pins adapted to be received by the plate and the base with a precision fit.