The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 1980
Filed:
Apr. 10, 1979
Samuel E Haggard, Houston, TX (US);
Travis E Riley, Houston, TX (US);
Eugene F Florian, deceased, late of Leona, TX (US);
Mark Products, Incorporated, Houston, TX (US);
Abstract
A spring for a geophone has a plurality of spring arms connecting inner and outer concentric annular portions to resiliently resist relative movement of the annular portions along the concentric axis. Two support arms are connected to each spring arm. Each support arm has one end connected to one of the annular portions and the other end connected to the spring arm at a point spaced from the point of connection of the other spring arm to increase the natural frequency of the spring in a direction lateral to the concentric axis without changing appreciably the natural frequency of the spring along the concentric axis.