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. 29, 2009
Filed:
Jun. 25, 2008
Armin Fäller, Albstadt, DE;
Armin Fäller, Albstadt, DE;
Groz-Beckert KG, Albstadt, DE;
Abstract
A control device () for a clutch assembly () of a dobby comprises a selecting finger () that is driven by an electromagnet (). The selecting finger is rigidly connected to an armature () that has a curved armature section and a straight armature section. Together with an appropriately curved pole () of the magnetic circuit, the curved armature section forms an air gap () that is preferably not influenced by the pivot position of the selecting finger. The other pole () of the electromagnet () forms a preferably straight air gap (), said air gap being variable and having a size that is a function of the pivot position of the selecting finger. Due to the existing lever ratios, the maximum width of the trapezoidal gap is substantially smaller than the path of the outer end of the selecting finger () between its two selection positions. The distance (A) between the pivot center () and the variable air gap () is substantially smaller than the length of the selecting finger ().