Browse Prior Art Database

High Speed Skip for Card Data Recorder

IP.com Disclosure Number: IPCOM000077907D
Original Publication Date: 1972-Oct-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Ferreri, V: AUTHOR [+3]

Abstract

The drawing shows a modification to controls 2, 3 and 6 for a stepping motor 4 for a data card punch, in which the motor increments a card past the punch station at high speed during a skip operation. The unmodified punch provides a signal OUTSKIP, that signifies that the buffer that holds the data to be punched is blank for the column to be punched and the next column. The signal SKIP inhibits a punch operation in these blank columns, and a signal ESCAPE CONTROL causes the motor to increment the card position: one column. The controls of the unmodified punch produces timing signals M1, M2, M3 (referenced in Fig.

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 70% of the total text.

Page 1 of 2

High Speed Skip for Card Data Recorder

The drawing shows a modification to controls 2, 3 and 6 for a stepping motor 4 for a data card punch, in which the motor increments a card past the punch station at high speed during a skip operation. The unmodified punch provides a signal OUTSKIP, that signifies that the buffer that holds the data to be punched is blank for the column to be punched and the next column. The signal SKIP inhibits a punch operation in these blank columns, and a signal ESCAPE CONTROL causes the motor to increment the card position: one column. The controls of the unmodified punch produces timing signals M1, M2, M3 (referenced in Fig. 2), which are decoded in a circuit 3 to energize the four windings of motor 4 through a four part stepping sequence The logical condition M1+M2+M3=0 defines a winding energization of motor 4 to hold the motor in a reference position. The timing signals M1, M2, M3 are derived from the buffer clock, and in a normal skip operation the card is incremented once during two scanning cycles of the buffer and it fully stops between column incrementing operations.

Fig. 3 shows the timing sequence for a high-speed skip operation. The SKIP signal produces an acceleration interval that equals a normal step operation in time and increments the card one column, but does not stop. Thereafter, the signal OUTSKIP maintains a high-speed motor sequence with an increment operation for each buffer cycle. The example shows high-speed cycl...