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:
May. 15, 1979
Filed:
Feb. 19, 1975
Claude Laesser, La Chaux-de-Fonds, CH;
Ebauches S.A., Neuchatel, CH;
Abstract
A rotatable member to be driven step-by-step having a set of grooves, each of the grooves having two circular portions offset from one another and joined by a connecting portion. A driving rotatable disc has a first protrusion, having a radius of trajectory equal to the radius of the circular portions, which engages the first circular portion without driving the rotatable member. The protrusion follows the first circular portion as it rotates until it reaches the connecting portion where it drives the rotatable member forward one step until the protrusion is aligned with the second circular portion. The protrusion then follows the second circular portion without moving the rotatable member. A second protrusion can be provided on the driving rotatable disc to follow a third circular portion of a different radius so the rotatable member is locked in position except when the first protrusion is in the connecting portion. Alternately, a fourth circular portion of equal radius to the first and second circular portions can be provided connecting the second circular portion with the first circular portion of the next groove.