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    • 3. 发明申请
    • RENTAL CONTRACT TIMER SYSTEM
    • 租赁合同定时器系统
    • WO1987003389A1
    • 1987-06-04
    • PCT/US1986001822
    • 1986-09-08
    • GREEN, David, L.
    • G04B47/00
    • G06Q20/127G07F17/0014
    • Rental equipment such as television sets are provided with a timer (16) which operates a relay (54) to connect power to the equipment only during the time for which rental has been paid. The timer (16) includes a magnetic reader head (66) and decoder (72) to produce digital signals corresponding with a magnetic stripe (36) which has been encoded with rental period and identifying information at the location where the rent is paid. The timer (16) contains a real-time clock (58) and a microprocessor (64) to compare the current time with the time in the rental period. A power supply (52) for the timer (16) derives energy from the same power lines (50) used for the rental equipment, but a battery (60) is also provided to power the clock (58) alone when the power supply (52) is not energized. Displays of the current time (84) and rental expiration time (80) are provided, as well as visible (30) and audible alarms (88) to warn of the approach of the end of the rental period.