Stand Alone Magnetic Encoder
Original Publication Date: 1973-Jul-01
Included in the Prior Art Database: 2005-Feb-26
Dimmick, RF: AUTHOR [+3]
Magnetic striped cards or tickets are manually fed through a magnetic encoder, which magnetically records data thereon where the data has been entered into the encoder by means of a keyboard. The magnetic encoder shown in Fig. 1 includes slot encoder 10, keyboard 20 and light-emitting diode display 60. The slot encoder 10 is of the type shown and described in the IBM Technical Disclosure Bulletin, December 1972, Vol. 15, No. 7, pages 2190 and 2191.
Stand Alone Magnetic Encoder
Magnetic striped cards or tickets are manually fed through a magnetic
encoder, which magnetically records data thereon where the data has been
entered into the encoder by means of a keyboard. The magnetic encoder shown
in Fig. 1 includes slot encoder 10, keyboard 20 and light-emitting diode display
60. The slot encoder 10 is of the type shown and described in the IBM Technical Disclosure Bulletin, December 1972, Vol. 15, No. 7, pages 2190 and 2191.
Keyboard 20 contains numeric keys 21 for the digits 0-9, space key 22 and function keys 23, 24 and 25 for the functions of reset, cancel and enable, respectively. The numeric keys 21 are encoded in binary-coded decimal form and the encoded data is transmitted by a 4-bit data bus 30, Fig. 2, to addressable storage unit 31. Data is written into storage unit 31 under control of OR circuit 32 upon being addressed by the contents of register 33. Register 33 addresses location 0 when the encoder is reset in response to applying power thereto.
Operation of a numeric key 21 or space key 22 causes data to be presented to storage unit 31 on bus 30. When the operated key is fully depressed, a sample data signal is generated on conductor 34 and passed by OR circuit 32 to enter the data on bus 30 into storage unit 31. Upon release of the operated key, an advance memory address signal is generated on conductor 35 for advancing the address is register 33. Had the cancel key 24 been depressed, the address in register 33 would have been decremented and a blank would have been written into storage 31, in place of the previously entered character. After the desired number of characters have been entered into storage unit 31, up to 48 characters can be entered, enable key 25 is operated to activate the slot encoder write circuitry.
As data is being entered into storage unit 31 by operating keyboard 20, the last seven characters which have been entered into storage unit 31 are decoded by logic 61 which drives display 60. Register 62 continuously provides the address to storage unit 31 via AND circuit 63, unless it is degated by the display lockout signal. The lockout signal occurs whenever data is being written into or read from memory 31. The high-order address in register 62 comes from register 33 and is used for multiplexing decode circuit 61. The last character keyed is always the right-most (eighth) character of the display. As each new character is keyed, the displayed characters shift left one character position.
After all of the data has been entered into storage unit 31 and enable key 25 has been depressed, the operator places the card, not shown, with the magnetic stripe into slot 11 and manually moves it across the length of the slot. This causes emitter signals to be generated in the manner described in the above- referenced publication. The emitter signals are applied over conductor 36 to amplifier card 37 and from there to pulse counter 38. The value in counter 38...