HEDLEY COMBS DAVIS
Pilots at Broad St, Middletown, DE
License number
Delaware A2542589
Issued Date
Feb 2017
Expiration Date
Feb 2019
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
202 S Broad St, Middletown, DE 19709
Personal information
See more information about HEDLEY COMBS DAVIS at radaris.comName
Address
Phone
202 S Broad St, Middletown, DE 19709
Professional information
Circuit For Interfacing Mouse Input Device To Computer System
US Patent:
4886941, Dec 12, 1989
Filed:
May 19, 1987
Appl. No.:
7/051451
Inventors:
Hedley Davis - Middletown DE
Robert Raible - West Chester PA
Robert Raible - West Chester PA
Assignee:
Commodore Business Machines, Inc. - West Chester PA
International Classification:
G08C 2100
US Classification:
178 18
Abstract:
A computer system mouse-type input device. Movements of a track-ball motion sensor are converted to quadrature signals and are accumulated in a counting circuit. The contents of the counter are pulse-position modulated with waveforms characteristic of a resistive-capacitive charging circuit and are read periodically by a computer input channel normally used for input of potentiometer-generated commands. The pulse-position modulated signals are converted to digital values used by the computer to position the cursor on a display screen.
Computer Video Demultiplexer
US Patent:
4851826, Jul 25, 1989
Filed:
May 29, 1987
Appl. No.:
7/055608
Inventors:
Hedley C. Davis - Middletown DE
Assignee:
Commodore Business Machines, Inc. - West Chester PA
International Classification:
G09G 116
US Classification:
340731
Abstract:
A computer video demultiplexer for combining a plurality of low resolution, video input signals into a plurality of higher horizontal and vertical resolution video output signals. Control signals for the video demultiplexer are coded on non-displayed video scan lines which are uniquely addressable so that several demultiplexers operated from one video signal may control a number of high resolution peripheral devices.