Patent GB-1244985-A (GB)
Title: Apparatus for performing an identification function on coded magnetic cards
Inventor: BARNEY WALTER WARREN
IPC: G07F7/10
Filed: 1968-06-19
Abstract: 1,244,985. Validating credit cards. W. W. BARNEY. 19 June, 1968 [30 June, 1967], No. 29204/68. Heading G4T. [Also in Division H1] An apparatus for performing an identification function on coded magnetic cards comprises a housing 12, Fig. 17, having a card receiving slot, a plurality of magnet responsive devices 140, Fig. 14, arranged at one side of the slot to confront respective ones of a plurality of magnetized portions of a card when placed in the slot, a number of manually operable selectors operable in a respective coded sequence, and a network coupled to the devices 140 and to the selectors and arranged to provide a signal when the selectors are operated in the coded sequence associated with the responses of the devices 140. The devices 140 are adapted to respond to portions of cards magnetized perpendicular to the card surface and having the polarities of the portions arranged at the surface to represent a respective card code. The devices 140 comprise single-pole, single-throw magnetic switches (see Division H1) mounted in plate 130, Fig. 14, and the selectors include a push-button operated bank 180 of single pole double throw switches 184, Fig. 17. When the magnetically encoded card 88 is dropped in the slot it produces a characteristic pattern of switching operations among the switches 140. The card owner is required to operate the push-buttons in accordance with a specific code to establish an appropriate switching sequence in the switch bank 180. The bank 180 comprises four modules of ten switches each. Each switch, Fig. 20, has a conductive shank 184, reduced at 216, and slidably mounted in a non-conducting block such that in its upper position the shank 184 makes contact with a spring finger 210 connected to a bus-bar 208 and in its lower position makes contact with a spring finger 202 connected to a bus-bar 200. The push-buttons are connected to the shanks 184 indirectly by means of a slidable bar selector. For each push-button there is an associated bar 248, Fig. 17, which rests upon the upper end of a plunger 244 mounted in a transversely slidable cross-bar 240 and bearing on the upper end 188 of a switch shank 184 in a particular module of ten switches. Initially a reset lever 28 resets the shanks 184 by means of bars 322 in a member 320 pivotal at 324 engaging any lowered shanks 184 to force them back to their upper positions. The lever 28 is also connected via a cam element 326 to fingers (266), 268, and moves the fingers to position the cross-bar 240 on the first module as shown in Fig. 17. The bar 240 is held in position above a particular module of switches by means of a pivoted sprung ratchet bar 290. Depression of one of the push-buttons results in one of the switch shanks 184 in the top-most module being depressed by the plunger 244 and effecting the first push-button operated switching operation. On release of the push-button, spring means 300, 304 co-operate to move the bar 240 into the second ratchet position above the second module of switch shanks 184. This procedure is repeated until the bar 240 moves into the fourth and last ratchet position whereupon a circuit switch 360, Fig. 27 (not shown), is closed. The final push-button switching operation is then performed. Validating lever 26 is then pulled and a further circuit switch is closed. If the switching sequences in both the card-operated bank of switches and in the push-button operated bank of switches have been correctly completed then the green indicator lamp 18 will be illuminated. If not, then the red indicator lamp 20 will be illuminated. The indicator network.-The fixed contact 184 of each of the push-button switches is connected to the movable contact of a respective switch 140. Certain of the switches 140 are closed in response to the magnetized portions of the card, and a correctly operated customer push-button code operates the respective associated pushbutton switches 184 so that current from a battery 412 flows through both legs 404 of each of two parallel relays R1, R2 to close switches 414, 416 and illuminate green indicator lamp 18. If the push-button operated switches 184 are not operated in correspondence with the associated magnet operated switches 140 then a bus-bar 200 will be connected to ground through the red indicator lamp 20 and via an unoperated pushbutton switch 184 associated with a closed switch 140, the power source 412 thus illuminating the red lamp 20. Print-out.-In a modification, Figs. 31-34 not shown) the card has an embossed portion which carries information to be imprinted upon a manifold set by means of a roller-pressed plate. The printing mechanism is electromechanically latched, to be released only when the green indicator lamp is illuminated. The roller may be operated automatically through suitable control circuitry including a solenoid to be energized upon illumination of the green lamp. The credit card.-A coded magnetic card (88), Fig. 3 (not shown), for use with the apparatus has an array of magnetized portions in the form of inserts (80) in the centre of three opaque, non- magnetic layers. The magnetic inserts are poled perpendicularly to the face of the card to form a predetermined master-pattern in which certain magnets are poled in one direction and the rest in the opposite direction. Coding is effected by reversing the polarities of selected ones of the inserts. The inserts may be barium ferrite in a rubber or plastics base. The layers may be plastics fused together to form the card.