Remote control system for door locks
First Claim
1. Apparatus operative to control access to an enclosure, said apparatus comprising:
- receiver means for receiving access request signals,memory means for storing one or more access authorization codes representative of access request signals, the receipt of which is used to control access to said enclosure, said memory means having therein adequate storage for storing at least two different access authorization codes at the same time,means for evaluating said access request signals in accordance with said access authorization codes and for controlling access to said enclosure in accordance with said evaluation, andfield programming means for providing programming periods for storing new access authorization codes in said memory means only during a said programming period, said field programming means being operative to automatically clear all of the old access authorization codes from said memory means during said programming period when a new access authorization code is stored, whereby, at the conclusion of said programming period, said memory means contains only those said access authorization. codes which were presented during said programming period.
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Accused Products
Abstract
A remote control system which includes (a) a receiver unit adapted to be fixedly mounted on a motor vehicle having at least one door lock with a first locked condition and a second unlocked condition and having circuits for receiving a coded signal including a code portion of binary bits, memory circuits for storing a first code of binary bits, circuits for comparing the code portion of a received coded signal with the first code and circuits for shifting the controlled device to one of the conditions upon the comparison match between the code portion of a received signal and the stored first code and (b) a transmitting unit for transmitting the stored second code of binary bits when the door lock is to be shifted into one of its conditions. In this system the invention involves the improvement wherein the coding of the second code set into the transmitter is a unique group of binary bits and the receiver unit includes a field programming arrangement for setting the first code of the receiver unit to the unique group of binary bits in the transmitting unit by using the signal from the transmitting unit as received by the receiver unit. In accordance with this improvement, the first code of the receiver unit is set to the second code of the transmitting unit in the field and may be changed from one code to another code upon authorized use of a second transmitting unit having its own unique code.
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Citations
13 Claims
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1. Apparatus operative to control access to an enclosure, said apparatus comprising:
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receiver means for receiving access request signals, memory means for storing one or more access authorization codes representative of access request signals, the receipt of which is used to control access to said enclosure, said memory means having therein adequate storage for storing at least two different access authorization codes at the same time, means for evaluating said access request signals in accordance with said access authorization codes and for controlling access to said enclosure in accordance with said evaluation, and field programming means for providing programming periods for storing new access authorization codes in said memory means only during a said programming period, said field programming means being operative to automatically clear all of the old access authorization codes from said memory means during said programming period when a new access authorization code is stored, whereby, at the conclusion of said programming period, said memory means contains only those said access authorization. codes which were presented during said programming period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification