Browse Prior Art Database

Printing Point Indicator

IP.com Disclosure Number: IPCOM000096848D
Original Publication Date: 1963-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Lennon, KA: AUTHOR

Abstract

A printing point indicator is raised to and maintained in the operative and visible position in response to the typist operating a lever on the typewriter keyboard. The indicator is automatically retracted when the next character is selected for printing by the typist.

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Printing Point Indicator

A printing point indicator is raised to and maintained in the operative and visible position in response to the typist operating a lever on the typewriter keyboard. The indicator is automatically retracted when the next character is selected for printing by the typist.

To raise indicator 10 to a visible position in front of the typewriter platen at the printing point, the typist depresses lever 11. Latch 12 is pivoted in a clockwise direction by the force transmitted via link 13. Movement of latch 12 releases lever
14. This pivots about pin 15 under the action of spring 16. Indicator 10 moves vertically to and is maintained in the operative position. simultaneously with the raising of the indicator, link 17, connected to lever 14, moves downward until clevis 18 is at the lower end of slot 19 in bellcrank 20.

When the typist depresses the next key for printing a character, ribbon lift mechanism 21 is actuated and ribbon lift bail 22 moves in a clockwise direction. Ribbon lift bail 22 pulls link 23 to rotate bellcrank 20. Movement of bellcrank 20 pushes link 17 upward to pivot lever 14 against the action of spring 16 and retract the indicator 10. Lever 14 is latched in its initial position by latch 12. The indicator is retracted from the printing point prior to the printing of the selected character.

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