Reminder apparatus
First Claim
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1. Reminder apparatus to be carried by a user with a key to remind the user as to the last operation in which the key was used with respect to a lock, comprising:
- a real time clock for measuring time;
an operation sensor for sensing the time of the last key operation in which the key was used with respect to the lock;
a memory for storing the time of the last key operation as sensed by the sensor;
a display;
a manually-operable member; and
a control circuit effective, upon manual operation of said latter member, to display in said display the time of the last key operation as stored in said memory.
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Abstract
Reminder apparatus to be carried by a user with a key constructed to remind the user as to the last operation in which the key was used with respect to a lock. The key includes an operation sensor which stores the time of the last key operation, and a display which, upon manual operation of the key, displays the time of the last key operation.
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Citations
17 Claims
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1. Reminder apparatus to be carried by a user with a key to remind the user as to the last operation in which the key was used with respect to a lock, comprising:
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a real time clock for measuring time; an operation sensor for sensing the time of the last key operation in which the key was used with respect to the lock; a memory for storing the time of the last key operation as sensed by the sensor; a display; a manually-operable member; and a control circuit effective, upon manual operation of said latter member, to display in said display the time of the last key operation as stored in said memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Reminder apparatus comprising:
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a transmitter unit adapted to be secured to a door having a lock and to transmit a signal; a receiver unit adapted to be carried by person with a key to be used for locking and unlocking the lock, the receiver unit receiving said signal from the transmitter; an audible signalling device; a circuit means for actuating said audible signalling device when said receiver unit is located more than a predetermined distance from said transmitter; said receiver unit including disabling means for disabling said audible signalling device when the door has been locked. - View Dependent Claims (15, 16, 17)
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Specification