Robert S Mcclure

US Patent:

43963188, Aug 2, 1983

Filed:

Aug 20, 1981

Appl. No.:

6/294662

Inventors:

Sam C. Jensen - Glendora CA
Robert M. McClure - Norco CA

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

B23B 4514

US Classification:

408 95

Abstract:

The collet-type drill includes improved clamping means having a pressure foot member that is in engagement with the work piece. The pressure foot member is connected with a drill motor and with a feed means. A collet is operably connected to and movable relative to the foot member, and when actuated, connects the drill to the work piece. A clamp bushing has one end pivotally connected with the collet and encircles a cylindrical sleeve that has a transverse slot extending therethrough. The bushing is connected to the pressure foot member. A clamping piston extends through the sleeve and carries a connecting pin that extends through the slot in the sleeve into the clamp bushing whereby the bushing and collet are movable together in response to movement of the clamping piston to force the collet into holding engagement with the work piece.

US Patent:

42801559, Jul 21, 1981

Filed:

Jun 4, 1979

Appl. No.:

6/045363

Inventors:

John C. Scott - Saratoga CA
Robert I. McClure - Santa Clara CA

Assignee:

Memorex Mini Disc Drive Corp. - Santa Clara CA

International Classification:

G11B 2302
G11B 2504
G11B 582

US Classification:

360 98

Abstract:

A method is described for improving the air flow over the surfaces of magnetic recording discs in a disc drive having a plurality of rotatingly driven such discs each having adiameter of less than nine inches and being coaxial and spaced from one another, and such disc drive having a plurality of selectively positionable magnetic transducer heads overlying portions of the discs, the method including spacing adjacent such discs a predetermined minimum distance from one another.