Bi-directional impulse shear wave generator and method of use

Acoustics – Geophysical or subsurface exploration – Seismic wave generation

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Details

181121, 181401, G01V 1053, G01V 1155

Patent

active

043018882

ABSTRACT:
In accordance with the present invention, an impulse generator of high portability is provided using a pair of guillotinized, separately activated hammer/anvil sub-assemblies. Since each sub-assembly is horizontal positioned, say in contact with the earth from a position below the wheel of an exploration truck, the equivalent of the "flying blade" of a guillotine, i.e., a weighted hammer element, must be provided with horizontal movement. This is done by tensioning a plurality of springs attached between the hammer element and a rectangular main frame.
During cocking and release of the hammer, the explorationist is provided with a series of visual signals in the form of deactivated and activated panel lights. These signals are automatically provided by controller means of the present invention. Release of the cocked hammer, however, is operator controlled for safety reasons say by activation of a latching means attached to the main frame of the assembly.

REFERENCES:
patent: 2740488 (1956-04-01), Heaps
patent: 2910134 (1959-10-01), Crawford et al.
patent: 3270832 (1966-09-01), Williams
patent: 3716111 (1973-02-01), Lavergne
patent: 4064964 (1977-12-01), Norden
patent: 4118994 (1978-10-01), Layotte et al.
patent: 4205731 (1980-06-01), Chalet et al.

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