Base plate locator for seismic source

Details Base plate locator for seismic source Base plate locator for seismic source

1986-03-31

1988-01-26

Kyle, Deborah L.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

181121, 181401, 248678, G01V 104

Patent

active

047211814

ABSTRACT:
The weight of a transport vehicle and the actuator of an impact type seismic source carried thereby is partially transferred by means of hydraulic lift cylinders to a freely movable earth contacting baseplate positioned beneath the actuator. In operation a mass is propelled by the actuator along a prescribed slant path to strike the baseplate. Shear strain is induced in elastomeric pads sandwiched between the hydraulic lift cylinders and the baseplate if the baseplate shifts sideways under such a slanting blow. The pads then exert a force to restore the vehicle and the actuator to a correct perpendicular alignment over the baseplate. Upper and lower position locator means fixed respectively to the hydraulic lift cylinders and to the baseplate interface with the elastomeric pads and fit slidably within each other so as to transmit vertical force from vehicle to baseplate. Intentional slight misalignment between the upper and lower locator means induces further restorative strain in the elastomeric pads as the locator means engage with each other.

REFERENCES:
patent: 1572574 (1926-02-01), Stromborg
patent: 3024861 (1962-03-01), Clynch
patent: 3291249 (1966-12-01), Bays
patent: 3306391 (1967-02-01), Bays
patent: 3393763 (1968-07-01), Sundt
patent: 3899281 (1975-08-01), Jakobs
patent: 4284165 (1981-08-01), Airhart et al.
patent: 4402381 (1983-09-01), Airhart

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