Communications: electrical – Selective – Having electron beam device
Patent
1976-06-28
1977-08-09
Birmiel, Howard A.
Communications: electrical
Selective
Having electron beam device
174 70R, 340 155MC, G01V 122
Patent
active
040414442
ABSTRACT:
The method and apparatus of the present invention are described in which connection (and disconnection) of a plurality of geophones associated with a digital seismic data acquisition system is greatly simplified without sacrificing flexibility as to the number of geophone flyers per station or the interval spacing per station and also without the addition of separate subcabling in the internal linkage of the flyers to the field digitizing equipment. The apparatus includes a multiple-phone flyer-jumper connected to each channel of a remote data acquisition and telemetering circuit (RDATC). The latter in turn is linked to a central control and recording station usually located in a truck. In accordance with the present invention, each jumper-flyer includes a central multi-conductor cable segment of say N+1 conductors where N is an even positive number greater than two, such as 4, 6, etc., terminating at each of its ends in the central leg of a multi-armed connector. A plurality of series/parallel connected geophones, say nine in number are used in combination with the central segment. At the ends of the arms of each multi-armed connector pass another conductor cable segment (similar to the central segment, but called the "branch cable segment") in which only two of the cables are actively connected to the selected conductor pairs of the central segment. At the other end of each branch cable is a two pin-two recepticle hermaphroditic connector.
REFERENCES:
patent: 3212599 (1965-10-01), Johnsen
patent: 3812455 (1974-05-01), Pearson
patent: 3866162 (1975-02-01), Florian
patent: 3883725 (1975-05-01), Fort et al.
patent: 3930145 (1975-12-01), Fort et al.
patent: 3956575 (1976-05-01), Sutherland
patent: 3986008 (1976-10-01), Fort et al.
Birmiel Howard A.
Chevron Research Company
Freeland, Jr. R. L.
Messner H. D.
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