Browse Prior Art Database

Pitch Sensing Device

IP.com Disclosure Number: IPCOM000052382D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Okcuoglu, SA: AUTHOR [+2]

Abstract

Printers are known in which the typefont is located in a cartridge assembly, thus providing for convenient typefont replacement through a mere drop-in type of operation. However, different typefonts having different characteristics should be usable on the same machine, and such machine should be able to discriminate between one typefont cartridge and another or, in other words, to identify the cartridge being used. The present apparatus provides for means for performing the above mentioned typefont cartridge identification.

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Pitch Sensing Device

Printers are known in which the typefont is located in a cartridge assembly, thus providing for convenient typefont replacement through a mere drop-in type of operation. However, different typefonts having different characteristics should be usable on the same machine, and such machine should be able to discriminate between one typefont cartridge and another or, in other words, to identify the cartridge being used. The present apparatus provides for means for performing the above mentioned typefont cartridge identification.

Fig. 1 shows a cartridge for a typewheel whose cartridge has been made to include two coding holes. By punching either one of these positions, or the two of them, or none of them, one would get four possible identification marks for the typewheel cartridge. When the cartridge is inserted into a machine (Fig. 2), the selection motor 6 is moved forward so that a drive hub 7, mounted on the motor 6 shaft 8, connects itself to the printwheel. At the same time, the configuration of coding holes is sensed by a switch assembly 9 which is connected to the logic electronics of the printer, which electronics then identifies the typewheel being used.

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