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, 1977
Filed:
Dec. 29, 1975
Robert A Broding, Tulsa, OK (US);
Standard Oil Company (Indiana), Chicago, IL (US);
Abstract
Cableless seismic recorders employ a small, mobile amplifier-recorder in which preferentially the recorder tape contains in digital form both identification information (called header data) and the response of a plurality of seismometers (seismometer group) to a seismic source, the whole arrangement requiring no cable connection between the various recorders and the control truck. Since this system is energized by a battery, it has not been previously possible to use summation techniques, as required, for example, when any repetitive seismic source is employed. Such a system is described here. Low power consumption is obtained by using a plurality of recirculating, dynamic shift registers connected in cascade. Feedback from the output of this cascade register chain under synchronized condition permits the seismometer response to the second use of the source to be additively superimposed upon the stored data from the first use of the source, and so on. Ultimately, the control truck sends commands terminating the cumulative recording and causing the summed signals, in turn, to be reproducibly recorded.