Everett Alfred Gilbert
Engineers in Montrose, CO
License number
Colorado 13109
Issued Date
Feb 15, 1975
Renew Date
Oct 1, 1998
Expiration Date
Oct 1, 1998
Type
Professional Engineer
Address
Address
PO Box 1206, Montrose, CO 81401
Personal information
See more information about Everett Alfred Gilbert at radaris.comName
Address
Phone
PO Box 2096, Montrose, CO 81402
538 Chipeta Rd, Montrose, CO 81401
Professional information
Audio Frequency Interface For Differential Relays
US Patent:
4878241, Oct 31, 1989
Filed:
Oct 3, 1988
Appl. No.:
7/252582
Inventors:
Everett A. Gilbert - Montrose CO
Assignee:
Da-Tel Research Company, Incorporated - Montrose CO
International Classification:
H04M 1100
US Classification:
379106
Abstract:
The invention interfaces a two-wire 60 Hz circuit to two circuits, each unidirectional, sending and receiving, and carrying frequency modulated audio tones containing the amplitude and phase of the 60 Hz voltage impressed on the 60 Hz circuit. The invention is used to interface differential relays used by electric utilities to detect power transmission line faults to a four-wire voice band communication line.
Frequency Shift Demodulator
US Patent:
5015961, May 14, 1991
Filed:
Aug 3, 1990
Appl. No.:
7/562236
Inventors:
Robert E. Springer - Montrose CO
George F. Hafer - Montrose CO
Everett A. Gilbert - Montrose CO
George F. Hafer - Montrose CO
Everett A. Gilbert - Montrose CO
Assignee:
Da-Tel Research Company, Incorporated - Montrose CO
International Classification:
H03D 326
US Classification:
329300
Abstract:
The invention improves the ability of the FS demodulator-circuit of an FS digital transmission system so as to withstand noise with low error count. The invention uses two different types of all pass networks and a phase measuring circuit to average random noise and enhance the desired FS frequencies.