JOHN R PATTERSON, JR
Electrician at Somerset Dr, Arlington, TX
License number
Texas 20342
Expiration Date
May 30, 2017
Category
Journeyman Electrician
Address
Address
3401 Somerset Dr, Arlington, TX 76013
Phone
(817) 891-4499
Professional information
Frequency Multiplexed Seismic Cable
US Patent:
4187493, Feb 5, 1980
Filed:
Jun 12, 1978
Appl. No.:
5/914709
Inventors:
John D. Patterson - Arlington TX
Assignee:
Texas Instruments Incorporated - Dallas TX
International Classification:
G01V 122
US Classification:
367135
Abstract:
A cable for electrically connecting a plurality of seismic receivers to a central data collecting unit contains a single electrical channel. The output signal of each seismic receiver is used to modulate a carrier signal having its own distinct frequency. The plurality of modulated carrier signals are frequency division multiplexed onto the single electrical channel and transmitted to the central collecting unit. There, narrowband filters are used to demultiplex the individual modulated carriers so that the signals may then be demodulated to recover the individual seismic receiver signals.