Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent
1980-12-24
1983-09-06
Moskowitz, Nelson
Acoustics
Geophysical or subsurface exploration
Seismic wave generation
181117, 181121, 124 56, G01V 1047, G01V 109
Patent
active
044023812
ABSTRACT:
A transportable, acoustic pulse generator is described employing an impact mass suspended above a freely movable target plate positionable on the ground, the impact mass being forceably propelled downwardly to strike the target plate to generate an acoustic pulse adapted for seismic purposes. The generator housing is adapted to be mounted on the rearwardly extending rails of a conventional transport truck. In order to eliminate bouncing of the truck due to generator housing recoil on firing, the housing itself is jacked up by lift cylinders extending upward from the target plate so as to minimize or eliminate the spring suspension of the truck. Upstanding sleeve guides carried on the generator housing cooperate with the lift means to provide lateral stability and to establish a precise vertical separation between the impact mass and the target plate, thus insuring repeatable signal energy content and timing.
REFERENCES:
patent: 4011923 (1977-03-01), Talke et al.
patent: 4056164 (1977-11-01), Johnston
patent: 4135598 (1979-01-01), Stafford
patent: 4316521 (1982-02-01), Chelminski
Atlantic Richfield Company
Betz Robert M.
Moskowitz Nelson
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