Time metering device particularly useful as a parking card
First Claim
1. A time metering device particularly useful as a parking card, comprising:
- a time storage device for storing data representing a total pre-purchased time;
a time measuring device;
time-selector key means for manually selecting a predetermined time interval;
a predetermined interval storage device for storing data representing the predetermined time interval selected;
display means;
and an electrical circuit including;
decrementing means for decrementing said pre-purchased time storage device and said predetermined interval storage device according to the time measured by said time measuring device beginning at a predetermined time from the manual operation of said time-selector key means;
device which terminates the operation of said decrementing means to decrement said pre-purchased time storage device and said predetermined interval storage device;
and means for connecting said display means to display the time in said pre-purchased time storage device as decremented by said decrementing means.
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Accused Products
Abstract
A time metering device particularly useful as a parking card comprises a time storage device for storing data representing total pre-purchased time; a time measuring device; time selector keys for manually selecting a predetermined time interval; a predetermined interval storage device; and an "off" key. The time metering device further includes an electrical circuit which decrements both the pre-purchased time storage device and the predetermined interval storage device according to the time measured by the time measuring device until the "off" key is operated, and a display which displays the remaining time in the pre-purchased and predetermined-interval storage devices.
65 Citations
15 Claims
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1. A time metering device particularly useful as a parking card, comprising:
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a time storage device for storing data representing a total pre-purchased time; a time measuring device; time-selector key means for manually selecting a predetermined time interval; a predetermined interval storage device for storing data representing the predetermined time interval selected; display means; and an electrical circuit including; decrementing means for decrementing said pre-purchased time storage device and said predetermined interval storage device according to the time measured by said time measuring device beginning at a predetermined time from the manual operation of said time-selector key means; device which terminates the operation of said decrementing means to decrement said pre-purchased time storage device and said predetermined interval storage device; and means for connecting said display means to display the time in said pre-purchased time storage device as decremented by said decrementing means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification