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:
Sep. 26, 1978
Filed:
Apr. 13, 1977
Lee E Siems, Houston, TX (US);
Western Geophysical Company of America, Houston, TX (US);
Abstract
The telemetric system consists of a large number of identical cable sections laid over the ground end-to-end, in a long array or 'spread'. The cables have a number of external connectors along their length for connecting geophone groups. The cables are electrically and physically interconnected by a like number of data transceiver modules. The data transceiver modules contain circuitry to receive and process data from the various geophone groups. A recording and control unit is connected to the spread at some convenient accessible location. The recording and control unit transmits control signals to the respective data transceiver modules. In response to the control signals, the respective modules transmit digital seismic signals, back to the recording and control unit. The cable sections and data transceiver modules are not polarized; that is, it is immaterial which end of a cable section is plugged into which side of a transceiver module. The same telemetric link that is used to transmit command and interrogation pulses to the respective transceiver modules is also used to receive digital data words from the respective modules. Accordingly, a direction sense circuit in each module determines the direction of any given module with respect to the recording unit and orders the digital logic contained within the module to electrically 'face' the recording unit.