Abstract: An automatic vehicular access control system for use by various government, business and private operations having a need to control the entrance of vehicles to their grounds or facilities. The system comprises a coded transmitter mounted in each authorized vehicle, a receiver located near each controlled entry, a microcomputer employed for system control, and a transmitter programmer employed for the coding of individual transmitters. The system employs a number of safeguards to insure the integrity and security of the system and it operates in a totally automatic mode without human intervention or manipulation.

Abstract: A punched card reader for use in systems such as bulk fuel terminal dispensing systems, automated unattended bank teller machines and the like includes security provisions to prevent operation of such systems by counterfeit cards. Specifically, the system operates with a punched card made of laminated plastic or the like having a rectangular plate made of magnetic material sandwiched between the card layers. This plate is located in an area of the card adjacent the portion encoded with the variable data uniquely identifying the card and the controlling its function, etc. The card entry throat of the tape reader is modified to have a pair of spaced-apart, magnetically actuated reed switches on one side of the card entry slot. On the opposite side of the card entry slot a pair of corresponding permanent magnets are located.

Abstract: A new and improved automatic fuel dispensing control system intended for use in serving a fleet of vehicles or equipment and requiring no operator action. A fueling receiver mounted in the fuel dispenser, a fueling transmitter mounted in each authorized vehicle, and a transmitter programmer comprise the system. Effective system security is afforded through the elimination of any requirement for keys, coded cards or the like.

Abstract: A power failure detection and restart system for use with a microprocessor (microcomputer) control system includes first and second cascaded voltage comparators, the first of which responds to a drop in the supply voltage supplied to the microprocessor to produce an output pulse causing a software freeze of the microprocessor. The microprocessor operates in response to the software freeze pulse to transfer the contents of certain registers thereof to a battery protected memory for temporary storage therein. A positive feed-back circuit is used on the first voltage comparator to insure its rapid and complete change of state; and this change of state signal is applied through a time delay circuit to the second voltage comparator, which produces an output signal a predetermined time after the software freeze pulse is obtained from the first voltage comparator to reset the microprocessor to an initial circuit condition.

Abstract: An automatic fuel-dispensing system for dispensing fuel at unattended fueling sites includes a number of fuel pumps capable of dispensing different types of fuel. A common control console is used to control the operation of the fuel pumps and to record the data relative to the customer identification, site location and quantity of fuel used. The control console includes a card reader, and a customer inserts a card which uniquely identifies him into the reader, enters an odometer reading, and selects a pushbutton for the fuel pump from which he desires to obtain fuel. If a validity check of the card against preset validity check data fails, a red invalid panel indicator illuminates on the control console; and no product can be withdrawn from the selected dispenser. If the inserted card passes the validity checks, the odometer reading and customer identification data is stored in a RAM memory uniquely associated with the selected dispenser.