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:
Nov. 17, 1981
Filed:
May. 14, 1979
Donald P Martin, Wheeling, IL (US);
Robert C Hoffman, Park Ridge, IL (US);
Richard H Kruse, Deerfield, IL (US);
Qwint Systems, Inc., Northbrook, IL (US);
Abstract
A dot matrix-type print head for forming a character-defining array of individual dots on a print-receiving surface includes a plurality of parallel-spaced print wires arranged in a vertical plane perpendicular to the print receiving surface. The print wires are individually actuated by respective actuator assemblies which each include a stationary portion consisting of an end plate, a bobbin, a solenoid winding, and a spring, and a movable portion consisting of a magnetic armature attached to the associated print wire. Upon energization of the solenoid winding the resulting magnetic flux displaces the magnetic armature and causes the print wire to impact the print-receiving surface. A frame comprising two parallel-spaced side plates maintains the stationary print head components in alignment, and progressive vertical displacement of the actuator assemblies within the plane of the print wires to align with respective print wires enables the actuator assemblies to be formed from identical components for manufacturing economy.