Browse Prior Art Database

Program Control Device

IP.com Disclosure Number: IPCOM000091896D
Original Publication Date: 1968-Jun-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Hulsizer, JC: AUTHOR [+2]

Abstract

In machines such as key punches and other key entry devices, the formatting of the data entered can be controlled by a program device. This can also control operation of the machine, e.g., in setting out appropriate areas of storage for different items of information.

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Program Control Device

In machines such as key punches and other key entry devices, the formatting of the data entered can be controlled by a program device. This can also control operation of the machine, e.g., in setting out appropriate areas of storage for different items of information.

The program device includes removable drum 10 operable in increments by stepping motor 12. Drum 10 mounts card 14 having apertures 16 which are punched in accordance with the programs desired. Drum 10 has apertures which correspond to every possible position of a punched aperture 16. Thus, light passes from source 18 to a corresponding one of a line of photocells in sensor 20 through each aperture 16 which is in alignment with sensor 20.

Each line of apertures 16 running longitudinally of drum 10 constitutes a machine instruction which is thus communicated via cable 22 to machine control logic 24. One element of the machine instruction can call for a certain number of machine cycles necessary for implementing that instruction, for example, for recording a corresponding number of characters. Once the machine executes the number of cycles called for, logic 24 signals motor control 26 via line 28. Then motor 12 indexes drum 10 to the next instruction.

Program card 14 includes, in addition to instruction apertures 16, an area 30 upon which is printed the identification of the various instructions. The location of an instruction is displaced from the location of its label in area 30 so that window 32, through which the instruction label is read, is in the front of the machine. Light 18 is at the other side of drum 10...