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. 09, 1982
Filed:
Mar. 27, 1980
Richard Wagner, Auburn, WA (US);
C Gordon Whitaker, Mercer Island, WA (US);
Mannesmann Tally Corporation, Kent, WA (US);
Abstract
A print hammer actuator system for a dot matrix line printer comprising a plurality of coils greater than the number of dot imprinting hammers to be actuated by the coils is disclosed. The coils (C1, C2 . . . C80 or 61, 62, 63 . . . 69) are mounted side-by-side in a fixed position; and, the hammers (H1, H2 . . . H40 or 51, 53, 55, 57) are oscillated back and forth in the regions where magnetic fields are produced by energized coils. As the hammers are oscillated, the coils are selectively energized and de-energized to actuate the hammers. Energizing the coils attracts the hammers toward the coils, against the spring force of the hammers. De-energizing the coils releases the hammers, whereby the stored spring energy creates a dot. Depending upon the position of the hammers, either one or two coils are energized and de-energized to actuate a single hammer.