Browse Prior Art Database

Temporary Storage For Key Operated Devices

IP.com Disclosure Number: IPCOM000098356D
Original Publication Date: 1960-Aug-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Stahl, WL: AUTHOR

Abstract

In data handling systems employing keyboards it is desirable to provide means for storing keyed in data temporarily before actual entry into the system to permit the operator to correct recognized keying errors. The storage system shown above provides this function.

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Temporary Storage For Key Operated Devices

In data handling systems employing keyboards it is desirable to provide means for storing keyed in data temporarily before actual entry into the system to permit the operator to correct recognized keying errors. The storage system shown above provides this function.

The system comprises a group of storage cores C, one associated with each key K, in which information is stored upon operation of the keys. The cores are interrogated in parallel at the beginning of each keying operation. The information, stored in a single core as a result of the preceding operation, is entered into the data handling system. The system thus remains one character behind the keyboard. A keying error timely recognized may, therefore, be corrected before the erroneous information is actually entered.

The device is utilized in a card punch in which operation of a key K activates a corresponding punch magnet M to punch a card. The operation is as follows. Assume that key K(1) has been previously operated, storing a one in core C(1), and that key K(2) is now operated. The operation of K(2), or any other key, closes the bail contact 10 which fires self extinguishing thyratron 11. The resulting voltage drop across cathode resistors 12 and 13 primes the punch thyratrons TH(1)... TH(n) by supplying suppressor grid voltage and also causes current to flow in readout windings 14, 15 and 16 of cores C(1)... C(n) All cores are reset to the zero state and the stored one is read from C(1) as a voltage induced in winding 17. At this time relay contacts R(1)...