Ray S Mckaig

US Patent:

6445326, Sep 3, 2002

Filed:

Jun 22, 2000

Appl. No.:

09/602596

Inventors:

Brian T. Donovan - Wilsonville OR
Ray S. McKaig - Wilsonville OR
William B. Dress - Wilsonville OR

Assignee:

Xyron Corporation - Vancouver WA

International Classification:

H03M 112

US Classification:

341155

Abstract:

An analog to digital convertor includes a pulse width modulated circuit (PWM) responsive to an analog parameter of an analog signal. The PWM circuit generates a pulse having a duty cycle proportional to the analog parameter. A counter generates a plurality of counterpulses during the pulse duty cycle and a sub-cycle pulse generator generates a series of subcycle pulses during each of the counterpulses. A latch circuit latches the state of the subcycle pulse generator at a predetermined time relative to the termination of the PWM pulse and a logic circuit counts the number of counterpulses which are generated during the PWM pulse. A most significant bit number is represented by the number of counter-pulses and a least significant bit number is determined by the state of the subcycle pulses in the latch. These two numbers added together provide a digital number representative of the analog parameter.

US Patent:

6850177, Feb 1, 2005

Filed:

May 13, 2002

Appl. No.:

10/477684

Inventors:

Brian Donovan - Vancouver WA, US
Ray S. McKaig - Vancouver WA, US

Assignee:

Xyron Corporation - Vancouver WA

International Classification:

H03M 182

US Classification:

341152, 341144

Abstract:

A method and circuit are provided for converting a digital signal to an analog signal in the form of a pulse width modulated (PWM) pulse (). The PWM pulse is generated during an output cycle of a pulse generator to form a pulsetrain output of pulses at a fixed frequency whose widths are determined by dynamically changing digital input data. The method includes the steps of dividing the digital data signal into most significant bit (MSB) and least significant bit (LSB) portions. A PWM pulse is initiated at the beginning of an output cycle and continues while the MSB portion counts down in a counter (). At the same time, the LSB portion of the digital data signal is converted to a precise phase delay signal which is a subcycle of an oscillator controlling the counter. This phase delay signal is generated after the termination of the MSB count, and halts the high period of the PWM pulse during the output cycle. When the output cycle ends, the process is repeated with the next digital signal.

US Patent:

6920632, Jul 19, 2005

Filed:

Aug 23, 2002

Appl. No.:

10/227050

Inventors:

Brian Donovan - Vancouver WA, US
Ray S. McKaig - Vancouver WA, US
William B. Dress - Camas WA, US

Assignee:

Xyron Corporation - Vancouver WA

International Classification:

G06F009/46

US Classification:

718103, 718104, 710264, 710244

Abstract:

A method for the orderly execution of multiple tasks in a data processing system and a circuit for implementing that method include a plurality of task modules which construct bids based upon the order of the task and its priority. The highest priority highest order number tasks are switched to available system execution resources. The system permits the orderly execution of round-robin task sets in an environment of dynamically changing priorities. When a round-robin task set is interrupted, the system is able to return to the round-robin task set after execution of the higher priority task at the exact point the interruption occurred.

US Patent:

8215270, Jul 10, 2012

Filed:

Jan 12, 2009

Appl. No.:

12/319900

Inventors:

Ray McKaig - Vancouver WA, US
Brian Donovan - Vancouver WA, US

Assignee:

McVan Aerospace, LLC - Vancouver WA

International Classification:

F02B 75/18

US Classification:

123 562, 123 561

Abstract:

Methods and apparatus are described for a reciprocating combustion engine. A method includes operating a dual-piston engine including introducing a gas into a pair of combustion chambers; introducing a fuel into the pair of combustion chambers; compressing the gas; combusting the gas and the fuel; and exhausting combusted gases. Each of the pistons drives a reciprocating crankshaft that protrudes through a cylinder wall and cooperatively rotate a pair of rotors by engaging substantially sinusoidal cam tracks on the rotors. An apparatus includes a cam driven, concentric drive rotary-valve dual-piston engine.

US Patent:

8578894, Nov 12, 2013

Filed:

Jul 9, 2012

Appl. No.:

13/544004

Inventors:

Ray McKaig - Vancouver WA, US
Brian Donovan - Vancouver WA, US

Assignee:

McVan Aerospace, LLC - Vancouver WA

International Classification:

F02B 75/18

US Classification:

123 562, 123 561, 1231903, 123 51 R

Abstract:

Methods and apparatus are described for a reciprocating combustion engine. A method includes operating a dual-piston engine including introducing a gas into a pair of combustion chambers; introducing a fuel into the pair of combustion chambers; compressing the gas; combusting the gas and the fuel; and exhausting combusted gases. Each of the pistons drives a reciprocating crankshaft that protrudes through a cylinder wall and cooperatively rotate a pair of rotors by engaging substantially sinusoidal cam tracks on the rotors. An apparatus includes a cam driven, concentric drive rotary-valve dual-piston engine.

US Patent:

20030014474, Jan 16, 2003

Filed:

May 30, 2002

Appl. No.:

10/160652

Inventors:

Ray McKaig - Vancouver WA, US
James Howard - Portland OR, US

International Classification:

G06F007/38

US Classification:

709/108000, 712/228000

Abstract:

A hardware task change system for the reduction of task change processing overhead delays in computer architectures includes an electronic circuit that switches data or tasks in multitasking computer architectures or other data processing circuits with minimal time delays. The system switches tasks by selecting the next task to run from the main working register set, the alternate register set, or the task storage memory. The working register has no multiplexer delay to the Central Processing Unit (CPU), and accomplishes this by connecting only one working register to the CPU instead of multiplexing two or more alternate working registers.

US Patent:

20120138702, Jun 7, 2012

Filed:

Dec 1, 2011

Appl. No.:

13/373827

Inventors:

Ray McKaig - Vancouver WA, US
Brian Donovan - Vancouver WA, US

International Classification:

F02M 51/00

US Classification:

239 11, 2395851

Abstract:

A method of operating a pressure compensated fuel injector includes: filling a fuel chamber with a charge of fuel by closing an injector valve and circulating a fuel from a fuel source through a plurality of recirculating valves and a cap valve; then isolating the fuel chamber and the charge of fuel from the fuel source; then equalizing a pressure within the fuel chamber to a rising pressure outside the fuel chamber by reducing a volume of the isolated fuel chamber; and then activating a solenoid that is coupled to the injector valve, opening the injector valve; and then further reducing the volume of the isolated fuel chamber to apply an over pressure within the chamber, pumping fuel from the fuel chamber through the injection orifice.

US Patent:

55768440, Nov 19, 1996

Filed:

Sep 6, 1994

Appl. No.:

8/300990

Inventors:

Ronald K. Anderson - Aloha OR
Duane F. Benson - Canby OR
Michael K. Crock - Lake Oswego OR
Bruine R. Hack - Wilsonville OR
James E. Howard - Portland OR
Ray S. McKaig - Boulder Creek CA
John Peers - West Linn OR

Assignee:

Unilearn, Inc. - Wilsonville OR

International Classification:

H04N 591
H04N 979
H04N 576
G11B 2702

US Classification:

386 52

Abstract:

A computer controlled video interactive courseware system is designed for the generation, viewing, and duplication of interactive instructional video tapes. An interactive instructional videotape contains video segments located on the stereo-video portion of a tape containing live-motion video images for the presentation of a lesson. Portions of the stereo-video portion of the tape contains video signals that contain digitally encoded information which is retrieved by the computer during playback of the tape. The digital information extracted from the videotape contains computer instructions to provide interactivity with students. Interactivity could include a presentation of questions to the student and based on the student's response to the question presenting selected video segments from the video tape. Preferably, the video cassette recorder is S-VHS which provides for increased bandwidth and uses a higher quality tape medium than standard VHS tape medium.