The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 1994
Filed:
Sep. 01, 1993
Applicant:
Inventors:
Paul E Carroll, Houston, TX (US);
Glenn D Fisseler, Houston, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
367 13 ;
Abstract
A method for a seismic data acquisition system (FIG. 1) for determining whether a geophone circuit break is in a seismic cable conductor pair (22) or in a takeout conductor pair (26). A resistor (32, 32A) is positioned across the takeout conductor pair (26) for a geophone group (20). An impedance measuring device (30) determines if the break is in the seismic cable conductor pair (22) by measuring infinity for an open circuit, or by measuring the impedance of the resistor (32, 32A) if the break is in the takeout conductor pair (26).