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Browse Prior Art Database

Print Wheel Insertion Mechanism for a Typewriter

IP.com Disclosure Number: IPCOM000048399D
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Brown, CG: AUTHOR

Abstract

In certain typewriters or printers employing daisy wheel type print wheels, insufficient room is available for permitting the print wheel selector motor to move towards and away from the print wheel cartridge, it being necessary to insert and remove the cartridge in situ. Disclosed is a cartridge and print wheel assembly that permits removal and insertion thereof, absent any rearward sliding motion of the selector motor.

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Print Wheel Insertion Mechanism for a Typewriter

In certain typewriters or printers employing daisy wheel type print wheels, insufficient room is available for permitting the print wheel selector motor to move towards and away from the print wheel cartridge, it being necessary to insert and remove the cartridge in situ. Disclosed is a cartridge and print wheel assembly that permits removal and insertion thereof, absent any rearward sliding motion of the selector motor.

Referring now to Fig. 1, a typical carrier 10 for a moving carrier typewriter includes guide ways 11, 12 for permitting motion of the carrier into and out of the plane of the drawing. A selector motor 13 mounted on the carrier includes a forwardly projecting motor shaft 14 which passes through an opening 15 in a print element cartridge 16. The print element 17 is held against the forward wall 16a of the cartridge 16 by a spring or the like (not shown) which bears against the body or central hub 18 of the print wheel 17.

When the cartridge is in the print position, and moved forwardly, a keyway slot in the front wall 16a of the cartridge 16 causes engagement of the print wheel 17 with the hub 14a of the motor 13, biasing the dance with the rotary position selected by the selector motor 13. This is illustrated in Fig. 2.

The insertion position and the clearance allowed for the cartridge 16 and print wheel 17 is illustrated best in Fig. 3, the shaft and hub 14a of the selector motor 13 being illustrated therein.

The motor 13 hub 14a, best illustrated in Figs. 6 and 7, includes a keyway 19 which registers with...