Method and apparatus for imparting a seismic pulse to the earth

Details Method and apparatus for imparting a seismic pulse to the earth Method and apparatus for imparting a seismic pulse to the earth

1973-12-26

1976-04-20

Moskowitz, Nelson

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

181117, 340 17R, G01V 102

Patent

active

039512290

ABSTRACT:
An apparatus and method for controlling the travel of a vehicle mounted seismic gas exploder adapted to deliver a downwardly directed pulse to the earth and thereafter be driven in an upward direction by the resultant reaction force. The exploder is flexibly coupled by means of a rope and pulley arrangement to the piston rod of a hydraulic cylinder. Compressed coil spring means aligned with the cylinder are released when the exploder jumps upward and apply a force to extend the piston rod and in so doing cause the rope to be retracted with gradually diminishing force. The exploder may be held at the upper limit of its travel, and its subsequent descent is utilized to recompress the spring means.

REFERENCES:
patent: 2897907 (1959-08-01), Blount et al.
patent: 3277977 (1966-10-01), Silverman
patent: 3474880 (1969-10-01), Gundlach
patent: 3516509 (1970-06-01), Coburn et al.

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