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:
Aug. 09, 1977
Filed:
Jun. 01, 1976
Ben B Thigpen, Houston, TX (US);
Western Geophysical Co. of America, Houston, TX (US);
Abstract
The apparatus provides a means for time-varying the signal sample rate and the subsurface coverage during a single seismic reflection recording cycle. A number of seismic sensor arrays are connected to a multichannel seismic recording apparatus through a data-signal transmission means such as a multiconductor cable or a telemetric link. Each seismic sensor array is, of course, connected to a corresponding input channel, including a preamplifier, in the multichannel recording apparatus. Included in the recording apparatus is a set of addressable multiplexer switches. The multiplexer switches (or for simplicity, simply multiplexers) are divided into at least two groups. Separate sets of anti-aliasing filters, each set having a different pass band, are connected to the input terminals of the respective subgroups of multiplexers. One half of the input channels are connected to both sets of filters; all of the input channels are connected to one set of filters and multiplexers.