Browse Prior Art Database

Print Hammer Drive

IP.com Disclosure Number: IPCOM000097173D
Original Publication Date: 1962-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Nelson, RD: AUTHOR [+2]

Abstract

The print hammer drive mechanism is for a high-speed printer. Printing is effected by the action of cantilever spring 1 on the arm 5 of print hammer 4. This occurs when the current in the winding 7 of holding magnet 6 is cut off. Spring 1 disengages automatically from arm 5 after firing.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Print Hammer Drive

The print hammer drive mechanism is for a high-speed printer. Printing is effected by the action of cantilever spring 1 on the arm 5 of print hammer 4. This occurs when the current in the winding 7 of holding magnet 6 is cut off. Spring 1 disengages automatically from arm 5 after firing.

Finger 2 of spring n provides a breaking action when hammer 4 rebounds after printing. This prevents the hammer from striking holding magnet 6. Hammer return spring 8 acts against finger 2 to hold the hammer in position slightly spaced from both legs of the magnet. The hammers are aligned in an array extending across the printer, with one hammer for each print position. The type bar 12 is driven incrementally back and forth between the hammers and the print medium. Upon completion of each line of print, all magnets 6 are re- energized simultaneously. The rotation of cam shaft 9, by means of cams 10 and 11, operates the recocking of drive springs 1 and the re-engagement of the part 3 of spring 1. with arm 5.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]