Norman D Nelson

US Patent:

45983291, Jul 1, 1986

Filed:

Mar 17, 1983

Appl. No.:

6/476062

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - Saint Paul MN

International Classification:

G11B 1560
G11B 1532
B65H 2308

US Classification:

36013021

Abstract:

A slack limiter device for magnetic recording tape in a videocassette which has a slotted metal plate forcefully slidaby fitting over an elongated stem on a cassette housing and bonded to a springy film having a low-friction edge covering which presses against moving tape.

US Patent:

45620288, Dec 31, 1985

Filed:

May 14, 1984

Appl. No.:

6/610047

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B29C 1702

US Classification:

264160

Abstract:

A method is described for forming a novel bowed shim for a cassette which includes impacting one surface of a sheet of polymeric material with particles until layer-like portions adjacent its surfaces are differentially expanded and the material is bowed, and then cutting the shim from the material.

US Patent:

41229851, Oct 31, 1978

Filed:

Nov 25, 1977

Appl. No.:

5/854601

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B65H 1720

US Classification:

226181

Abstract:

A tape cartridge is formed with a rotatable tape transport roller having a cylindrical exterior surface and a central bore into which protrudes a node from each inner sidewall of the cartridge to serve as trunnion axes for supporting the roller therein. In a preferred embodiment, the trunnion axes have an inward slant away from the central bore of the roller so that axial movement of the roller will produce a canting thereof to compensate for misalignment between the cartridge and components of a record/reproduce player in which the cartridge may be inserted.

US Patent:

46259422, Dec 2, 1986

Filed:

Apr 27, 1983

Appl. No.:

6/489252

Inventors:

Norman A. Nelson - Houston TX

Assignee:

NL Industries, Inc. - New York NY

International Classification:

F16K 316

US Classification:

251327

Abstract:

A gate valve, seat, and face seal therefor, the valve including a valve body defining a longitudinal flowway and a valve element mounted in the valve body and movable transverse to the flowway between open and closed positions. The valve seat mounted in the valve body includes a seat body having an axially facing annular contact face for opposition to the valve element and an annular groove extending axially thereinto, the annular groove in turn having inner and outer side walls. The face seal comprises an annular elastomeric seal body having a base portion disposed in the annular groove and a sealing portion which, in a relaxed condition, projects axially outwardly from the annular groove. The seal body further has an annular auxiliary sealing formation extending about its outer diameter and sealing engaging the outer side wall of the annular groove.

US Patent:

42168350, Aug 12, 1980

Filed:

Sep 5, 1978

Appl. No.:

5/939731

Inventors:

Norman A. Nelson - Houston TX

International Classification:

E21B 1502

US Classification:

175 10

Abstract:

A modular underwater support platform having interconnecting elements is lowered into position by a conductor pipe which in turn is connected to and supported from a drill pipe. Releasable hydraulic connections connect the platform to the conductor pipe and connect the conductor pipe to the drill pipe. After the hydraulic connection between the platform and the conductor pipe is released, the drill pipe drills a hole in the subsea floor for receiving the conductor pipe. The conductor pipe is positioned in the hole, and locked to the platform for supporting the platform. A base may be connected to the bottom of the support platform which includes hydraulic cylinder and piston assemblies for leveling the support platform. Hydraulic control lines are positioned on the support platform and adapted to be in communication with the hydraulic connections when the conductor pipe is locked to the platform for hydraulically releasing the connections allowing the removal of the drill pipe.

US Patent:

41846508, Jan 22, 1980

Filed:

May 8, 1978

Appl. No.:

5/903497

Inventors:

Norman E. Nelson - Roseville MN
Robert C. Cheasick - Camarillo CA

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B65H 7518

US Classification:

242 718

Abstract:

Recording tape reel having a plastic hub of I-beam construction and a pair of plastic flanges interconnected by an annular array of radially-elongated lugs through slots in the central web of the hub. Clearances permit the hub to be compressed under forces applied by a wound tape without substantially transmitting those forces to the flanges.

US Patent:

43289320, May 11, 1982

Filed:

Nov 3, 1980

Appl. No.:

6/203437

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B65H 7518

US Classification:

242 718

Abstract:

A weight assembly adapted for use with a polymeric reel to approximately match the moment of inertia of the polymeric reel to that of a similar metal reel. The weight assembly includes attachment assemblies adapted to enter apertures in a side wall of the reel, which attachment assemblies include pendulums automatically moved by gravity or centrifugal forces to releasably attach the weight assembly to the side wall of the reel.

US Patent:

44588585, Jul 10, 1984

Filed:

Jan 7, 1982

Appl. No.:

6/337629

Inventors:

Norman E. Nelson - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

G11B 1532
G11B 2304

US Classification:

242199

Abstract:

A method is described for forming a novel bowed shim for a cassette which includes impacting one surface of a sheet of polymeric material with particles until layer-like portions adjacent its surfaces are differentially expanded and the material is bowed, and then cutting the shim from the material.