Robert W Mccullough

US Patent:

49790544, Dec 18, 1990

Filed:

Feb 25, 1988

Appl. No.:

7/160501

Inventors:

Robert B. McCullough - Pleasanton CA
Robert G. Taylor - Santa Cruz CA
Glenn M. Stark - Santa Cruz CA
William G. Swinton - Santa Cruz CA
Bruce A. Fairman - Woodside CA

Assignee:

Tandon Corporation - MoorPark CA

International Classification:

G11B 509

US Classification:

360 48

Abstract:

A disk drive system includes a disk controller system having separate head positioning and data transfer subsystems and supporting up to four disk drives, two of which may be removable and two of which may connect through a standard ST506 interface. The system provides a read and write protected cylinder for removable drives, a read only cylinder for removable drives which may store a unique serial number as well as other write protected data, and a high capacity, high speed sector buffer which allows continuous transfers of data to or from noninterleaved sectors and supports concurrent disk and system accesses.

US Patent:

53629710, Nov 8, 1994

Filed:

Mar 10, 1993

Appl. No.:

8/029017

Inventors:

Robert L. McMahon - Clayton CA
Robert B. McCullough - Sunol CA
Victor Ivashin - Pleasant Hill CA

Assignee:

Terrascope Systems, Inc. - Los Gatos CA

International Classification:

G01N 1506

US Classification:

250577

Abstract:

A fiber optic detection system in which a single optic fiber has a U-shaped configuration. A source of light is disposed at one upper free end of the optic fiber and a light detector is disposed at the other upper free end of the optic fiber. At the bottom of the optic fiber is a light variable loop adapted to be disposed in various media, such as liquids, fluids and air. The light from the source of light is conducted from the source of light through the optic fiber and to the light detector. The quantum of light lost as the light travels through the light variable loop will depend on the medium or the concentration of the medium in which the light variable loop is disposed. The light detector detects the light advancing thereto to produce a signal representative of the medium or the concentration of the medium in which the light variable loop is disposed. An electronic circuit with a microprocessor is responsive to the signal produced by the light detector for determining the medium or the concentration of the medium in which the light variable loop is disposed.

US Patent:

45715750, Feb 18, 1986

Filed:

May 3, 1984

Appl. No.:

6/606876

Inventors:

Robert B. McCullough - Sunol CA

Assignee:

Sunol Systems Incorporated - Pleasanton CA

International Classification:

H03K 1324

US Classification:

340347DD

Abstract:

A method of run-length-limited encoding strings of data including a sequence of synchronizing bits having a value of binary zero for providing corresponding encoded bits which, when recorded on a magnetic storage medium, provide a maximum number of flux transitions. The steps of this method include serially receiving such a string of input bits, dividing the string of input bits into unique bit groups, replacing each group with a corresponding collection of encoded bits conforming with the limitations of the run-length-limited encoding scheme, including replacing each divided group of three input binary zeros into a collection of six encoded bits having two binary ones separated by two binary zeros, serially transmitting these collections of encoded bits for recording the same on the medium in the same sequence as the corresponding input bit groups are received.

US Patent:

20200292148, Sep 17, 2020

Filed:

Jun 3, 2020

Appl. No.:

16/891453

Inventors:

Robert W. McCullough - Sausalito CA, US

International Classification:

F21V 7/00
F21S 4/28

Abstract:

The disclosed embodiments pertain to methods and systems for producing a uniform irradiance upon a horizontal surface using an array of LED emitters and optionally a reflective surface. The uniform irradiance upon a horizontal surface has utility in horticultural lighting applications where it is desirable to distribute energy from the lighting system uniformly to the crop canopy to ensure uniform growth rates and optimal usage of electrical power. Linear LED arrays may be disposed in parallel along a linear support structure with the angle of the arrays and the angle of the LED beams adjusted to comport with an even light distribution over the plant canopy or horizontal surface. The optical light patters achieved resemble and are sometimes called “batwings.”

US Patent:

20200288553, Sep 10, 2020

Filed:

May 22, 2020

Appl. No.:

16/881683

Inventors:

Robert W. McCullough - Sausalito CA, US

International Classification:

H05B 45/56
H05B 47/28
H05B 45/54
H05B 45/345

Abstract:

Electrical current conditioning systems may include simplified electronic protection circuits for LED lights used for growing plants. A system includes an LED support structure with a channel extending therethrough, and an LED array module carried on a surface of the LED support structure. The LED array module includes an LED array and a current conditioning circuit which adjusts the amount of current flowing through the LED array in response to a temperature indication. The current conditioning circuit includes a current sensing circuit which adjusts the amount of current flowing through the LED array in response to a voltage indication.