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. 05, 1989
Filed:
Feb. 19, 1988
Normand C Smith, Charlotte, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A wire dot matrix print head suitable for a low cost computer printer is described. The print head incorporates a one piece armature constructed of thin high strength sheet metal. The armature has a plurality of rigid radial arms radiating inwardly from a torsionally flexible periphery. Each of the rigid radial arms has an integral pair of flanges for adding rigidity, and an attached moving core of magnetically permeable material. Each of the rigid radial arms is connected to the periphery at an arm base. Each of the rigid radial arm bases is provided with a slight bend. The combination of torsional action of the flexible periphery acting at the bend and a fixed clamping action of a cap at intermediate portion of the flexible periphery provides a biasing force to each of the radial arms.