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:
Jun. 06, 1995
Filed:
Aug. 17, 1993
Thomas J Ross, Largo, FL (US);
Safco Corporation, Chicago, IL (US);
Abstract
An alidade surveying instrument, comprising a pair of gimbeled yokes, a mounting base supporting the pair of gimbeled yokes for rotation on axes perpendicular to one another, a ranging device carried by the gimbeled yoke pair for targeting a remote object both as to elevation and azimuth, a first gear set coupled to one of the yokes and second gear set coupled to the other yoke, a pivot plate supporting one of the gears of each gear set for a varying degree of gear meshing with respect to its associated gear, and a spring for applying a variable force to the pivot plate for driving the gears of each gear set into a yielding engagement to counteract physical variations in the degree of gear set engagement as the gears of each set mesh and rotate relative to one another.