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:
Feb. 19, 1985
Filed:
Jul. 02, 1984
Applicant:
Inventor:
Guy A Wojtanek, Franklin Park, IL (US);
Assignee:
The Singer Company, Stamford, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
G04F / ;
U.S. Cl.
CPC ...
368108 ; 200 / ;
Abstract
An expanded interval drive mechanism for a program timer includes a lift cam which periodically engages a pawl lifter to move the pawl lifter so as to lift the drive pawl away from the ratchet teeth. The ratchet teeth are at two levels. Where the ratchet teeth are at the lower level, operation of the pawl lifter prevents the drive pawl from engagement with the lower level ratchet teeth. However, the higher level ratchet teeth are always engaged by the drive pawl regardless of the operation of the pawl lifter. Therefore, an expanded interval is achieved in the region having the lower level ratchet teeth.