GB2024914A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
An Electronic Locking System
Assignee: Sweetman D N
•
Filing: 1979-05-18
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Granted: —
•
Expires: 1999-05-18
Abstract
Abstract An electronic locking system includes a lock and a key designed so that on inserting the key into the lock, the lock transmits to the key a lock code. The key receives this lock code and transmits to the lock a key actuating code. The lock then samples this key actuating code and is actuated only if the key actuating code is correct. In a preferred system, it is not necessary to insert the key into the lock in order to transmit a lock code to the key. The lock and the key are operable so that the key transmits to the lock a starting code, and the lock samples the key starting code and transmits to the key a lock code only if the key starting code is correct. The key samples this lock code and transmits to the lock a key actuating code only if the lock code is correct. The lock then samples the key actuating code and is actuated only if the key actuating code is correct. The codes may be in various forms such as, for example electronic, sonic, ultrasonic or light pulses.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 19:38
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/00174; G07C9/00309; G07C9/20; G07C9/29; G07C2009/00753; G07C2009/00761; G07C2009/00769
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
65 words
An electronic locking system comprising a lock and a key which are operable so that on inserting the key into the lock, the lock transmits to the key a lock code, the key receives the lock code, and transmits to the lock a key actuating code, and the lock samples the key actuating code and is actuated only if the key actuating code is correct.
Claim 2
Dependent Claim
65 words
An electronic locking system comprising a lock and a key which are operable so that on inserting the key into the lock, the lock transmits to the key a lock code, the key receives the lock code, and transmits to the lock a key actuating code, and the lock samples the key actuating code and is actuated only if the key actuating code is correct.
Claim 3
Dependent Claim
16 words
A system as claimed in Claim 1, in which the lock code is a pulse train.
Claim 4
Dependent Claim
17 words
A system as claimed in Claim 2, in which the lock includes a diode resistor OR gate.
Claim 5
Dependent Claim
27 words
A system as claimed in Claim 3, in which the lock OR gate is fed from selected outputs of a
BCD-decimal decoder coupled to a decade counter.
Claim 6
Dependent Claim
22 words
A system as claimed in Claim 4, in which the decade counter is fed by the gated output of a two-bit counter.
Claim 7
Dependent Claim
28 words
A system as claimed in Claim 5, in which the two-bit counter is fed by a master oscillator or clock actuated by inserting the key into the lock.
Claim 8
Independent Claim
29 words
A system as claimed in any one of Claims 2 to 6, in which the key includes a key receiving sensor to reconstitute received lock pulses into digital pulses.
Claim 9
Dependent Claim
36 words
A system as claimed in Claim 7, in which the key also includes the decade counter, decoder and diode resistor OR gate as claimed in Claims 3 to 5 which are fed by said digital pulses.
Claim 10
Dependent Claim
28 words
A system as claimed in Claim 8, in which the key further includes a key transmitter sensor fed by said OR gate to produce said key actuating code.
Claim 11
Dependent Claim
28 words
A system as claimed in Claim 9, in which the lock includes a receiving sensor to receive the key actuating code and to reconstitute it into digital pulses.
Claim 12
Dependent Claim
37 words
A system as claimed in Claim 10, including a two-input exclusive OR gate in which one input is fed by said lock diode resistor OR gate, and the other input is fed by said lock receiving sensor.
Claim 13
Dependent Claim
88 words
An electronic locking system comprising a lock and a key which are operable so that the key transmits to the lock a starting code, the lock samples the key starting code and transmits to the key a lock code only if the key starting code is correct, the key samples the lock code, and transmits to the lock a key actuating code only if the lock code is correct, and the lock samples the key actuating code and is actuated only if the key actuating code is correct.
Claim 14
Dependent Claim
88 words
An electronic locking system comprising a lock and a key which are operable so that the key transmits to the lock a starting code, the lock samples the key starting code and transmits to the key a lock code only if the key starting code is correct, the key samples the lock code, and transmits to the lock a key actuating code only if the lock code is correct, and the lock samples the key actuating code and is actuated only if the key actuating code is correct.
Claim 15
Dependent Claim
29 words
A system as claimed in Claim 12, in which at least one of the key starting code, lock code and key actuating code is a coded stream of pulses.
Claim 16
Dependent Claim
18 words
A system as claimed in Claim 13, in which the key starting code is a burst of pulses.
Claim 17
Dependent Claim
23 words
1 5. A system as claimed in any one of Claims 12 to 14, in which the lock includes diode resistor
OR gates.
Claim 18
Dependent Claim
30 words
A system as claimed in Claim 15, in which the lock diode resistor OR gates are fed from selected outputs of a BCD/Decimal decorder coupled to a first decade counter.
Claim 19
Dependent Claim
25 words
1 7. A system as claimed in Claim 16, in which the first decade counter is fed by the gated output of a two-bit counter.
Claim 20
Dependent Claim
29 words
A system as claimed in Claim 17, in which the two-bit counter is fed by a master oscillator or clock actuated by an output of a second decade counter.
Claim 21
Dependent Claim
33 words
A system as claimed in Claim 1 8 in which the second decade counter is fed by a lock receiving sensor (and buffer circuitry), the sensor reconstituting received key pulses into digital signals.
Claim 22
Dependent Claim
21 words
A system as claimed in Claim 18 or Claim 19, in which the second decade counter is reset at regular intervals.
Claim 23
Independent Claim
32 words
A system as claimed in any one of Claims 12 to 20, in which the key includes two (key) receiving sensors and buffer circuitry to reconstitute received lock pulses into digital pulses.
Claim 24
Dependent Claim
38 words
A system as claimed in Claim 21, in which the key also includes the first decade counter, decoder, and diode resistor OR gates as claimed in Claims 1 5 to 17 which are fed by said digital pulses.
Claim 25
Dependent Claim
33 words
A system as claimed in Claim 22 in which said lock code is also generated in the key by the said first decade counter, decoder and diode resistor OR gates of Claim 22.
Claim 26
Dependent Claim
29 words
A system as claimed in Claim 23, including a two input comparator to compare said lock code generated in the key with said lock code received by the key.
Claim 27
Dependent Claim
35 words
A system as claimed in Claim 24, in which said key actuating code is generated by said first decade counter, and decoder of Claim 22 using a different set of OR gates from Claim 16.
Claim 28
Dependent Claim
36 words
A system as claimed in Claim 12 to 25 in which said lock actuating code is received by the lock receiving sensor of Claim 19, and buffer circuitry to reconstitute received key pulses into digital pulses.
Claim 29
Dependent Claim
56 words
A system as claimed in Claim 26 in which said lock actuating code received by said lock receiving sensor is fed to one input of a comparator, whose other input is fed by said lock actuating code generated by said first decade counter decoder (and the different set of diode resistor OR gates) of Claim 25.
Claim 30
Dependent Claim
21 words
A system as claimed in Claim 27 in which said comparator circuit Is fed from gated outputs of a two-bit counter.
Claim 31
Dependent Claim
14 words
An electronic locking system substantially as herein described and illustrated in the accompanying drawings.
Claim 32
Dependent Claim
14 words
An electronic locking system substantially as herein described and illustrated in the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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