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:
Jan. 30, 1979
Filed:
Oct. 27, 1977
John W Reece, Sunnyvale, CA (US);
Victor J Italiano, Ithaca, NY (US);
Leslie L Crump, Trumansburg, NY (US);
NCR Corporation, Dayton, OH (US);
Abstract
A matrix print wire solenoid has a small diameter print wire which wire is propelled against printing paper and inking ribbon by the linear motion of the solenoid plunger, to which the print wire is attached, in an improved impact printer having a plurality of solenoids positioned in a row for use in dot matrix printing. The solenoid features a low cost construction, a reduction in size, and increased operating speed, and has pole pieces which are separated by an inner gap and which pieces are aligned with a coil bobbin which provides a guide surface for the armature plunger. The space between the plunger and a forward bushing or spacer is occupied by a coil spring which has one end seated over a portion of the armature and the other end seated against the face of the bushing. The coil bobbin defines an air gap between one pole piece and the armature.