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. 16, 1977
Filed:
Oct. 28, 1975
J Robert Fort, Altadena, CA (US);
James A Westphal, Altadena, CA (US);
C Hewitt Dix, Pasadena, CA (US);
Geophysical Systems Corporation, Pasadena, CA (US);
Abstract
This abstract describes a system for the field recording of seismic data in which a plurality of geophone outputs are connected to an array terminal. Each geophone is connected to a fixed gain differential amplifier of high gain. The outputs of the amplifiers are square wave and each output goes to one of the parallel inputs of a parallel to serial convertor, through gate means. On a first command from an array controller in a distant recording truck, the gate means are momentarily opened, to store a single bit in each channel corresponding to the sign of the square wave, in the convertor inside the array terminal. The convertor then reads out as a train of serial bits, the stored pulses. This train of single bit signals is carried to the array controller through each of the other array terminals by a single pair of conductors, and stored on a magnetic recording means.