Raymond B Larsen

US Patent:

D4144821, Sep 28, 1999

Filed:

Jan 5, 1999

Appl. No.:

D/098762

Inventors:

Robin W. Chu - San Francisco CA
Mark A. Edwards - San Francisco CA
Raymond B. Larsen - Rawlins WY

Assignee:

Altra Corporation - Rawlins WY

International Classification:

1402

US Classification:

D141171

US Patent:

44360851, Mar 13, 1984

Filed:

Aug 24, 1982

Appl. No.:

6/411032

Inventors:

Raymond B. Larsen - Sausalito CA

Assignee:

Acme Solar Works, Inc. - Lodi CA

International Classification:

F24J 302

US Classification:

126450

Abstract:

The invention comprises a solar collector formed from frame members which support spaced films of radiation absorbing and reflecting capabilities, respectively. The frame further supports an outer pair of films disposed on opposite sides of the inner films. The frame includes inlets and outlets for flow of water between the inner films and flow of air between the outer films and inner films.

US Patent:

61221325, Sep 19, 2000

Filed:

Mar 18, 1998

Appl. No.:

9/044399

Inventors:

Raymond B. Larsen - Rawlins WY

Assignee:

Altra Corporation - Rawlins WY

International Classification:

G11B 5596

US Classification:

360 7703

Abstract:

A disk drive head position encoder is for use in a disk drive having a storage media, a read/write head and an actuator configured to control a position of the head. The position encoder includes a scale having gratings formed by undulations configured to distort light penetrating therethrough. A light source is configured to penetrate the scale and to direct light onto a photodetector, where the photodetector is configured to generate a photodetector signal in response to the light. A processor is coupled to the photodetector and the actuator and configured to determine a head position of the head on the storage media by processing the photodetector signal. In one embodiment, the is constructed from a material having a coefficient of thermal expansion similar to that of said storage media. In another embodiment, the processor includes an analog to digital convertor configured to convert the photodetector signal to a digital signal representative of an amplitude of the photodetector signal, and the processor is configured to determine the head position based at least in part on the digital signal. Advantages of the invention include the ability to accurately position the head on the storage media tracks during prolonged operation of the disk drive.

US Patent:

43219128, Mar 30, 1982

Filed:

Jul 11, 1980

Appl. No.:

6/167421

Inventors:

Raymond B. Larsen - Sausalito CA

International Classification:

F24J 302

US Classification:

126450

Abstract:

A frame assembly including frame members (14, 14', 15, and 15') for supporting a plurality of films (31, 32, 33, and 34) in tension and in spaced relationship and for directing fluid between a pair of the films and receiving the fluid flowing from the pair of films. The frame members include an outer channel (17) and an inner spaced channel (20) with insulation (29) therebetween.

US Patent:

49224522, May 1, 1990

Filed:

Nov 16, 1987

Appl. No.:

7/120669

Inventors:

Raymond S. Larsen - Menlo Park CA
James T. Walker - Palo Alto CA

Assignee:

Analytek, Ltd. - Cupertino CA

International Classification:

G11C 2700

US Classification:

365 45

Abstract:

An analog integrated circuit is disclosed using integrated field effect transistor technology comprising a plurality of sampling and storage cells. A two-stage sampling cell design is used. The first stage incorporates a very small capacitor coupled to the input signal through a high speed gate. This gate, which is opened only by the simultaneous occurrence of row and column cells in the circuit, causes this first capacitor to capture at very high speed a sample of the analog signal under study. When all the first capture sections of the cell have captured on their capacitors a sample of the analog signal, a transfer gate is briefly opened to transfer the captured and buffered sample values to the second or storage section of the cells. This storage section incorporates a capacitor substantially larger than the capacitor in the capture section, and capable of storing the signal for a considerably longer time.