Title: Device for generating seismic waves by striking a mass against a target member

Abstract: A device for generating acoustic waves in the earth by striking a mass, housed in a guiding tube, against a target member secured to the lower end of this tube and coupled to the earth in operating conditions, including means, such as an electromagnet, for holding said mass at the upper end of said tube and releasing it at will, and means to turn the tube upside down after each operation so as to reset the mass in position for a new operation.

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Inventors: Cholet, Jacques (L'Etang-la-Ville, FR)
Pauc, Andre (Villennes sur Seine, FR)

Application Number: 926166
Filing Date: 1978-07-19
Publication_date: 1980-06-03
Assignee: Institut Francais du Petrole (Rueil-Malmaison, FR); Compagnie Generale de Geophysique (Massy, FR)
Primary Class(es): 181/114 181/121
Other Classes:
US Patent Ref:

3209854	Oct, 1965	Williams	181/121.
3318411	May, 1967	Doubt	181/121.
3393763	Jul, 1968	Sundt	181/114.
3542151	Nov, 1970	Hamilton	181/121.
4064964	Dec, 1977	Norden	181/121.
4118994	Oct, 1978	Layotte et al.	181/121.

Other Refs: 612569

Apr, 1935	DE2

Primary Examiner: Birmiel, Howard A.
Assistant Examiner:
Attorney: Millen & White