Patent US2090616A successfully refreshed from Google Patents.
US4036178A
Expired / Lapsed
US
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Electronic lock and key system
Assignee: Individual
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Filing: 1975-06-02
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Granted: 1977-07-19
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Expires: 1995-06-02
Abstract
Abstract An electronic lock and key system is provided for controlling access. A passive key provides selective access without having a self contained power source. In a passive transponder arrangement, a passive electronic key processes induced or radiated electronic signals to generate a transponder signal for controlling access.
Inventors
- 👤 Barry Thomas Lee
- 👤 Gilbert Peter Hyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:21
CPC Classifications
A; A01; A01K; A01K11/00; A01K11/006
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
59 words
A control system comprising: excitation means for generating an excitation signal; identification means for generating an identification signal in response to the excitation signal, said identification means including at least one monolithic integrated circuit; sensor means for generating a sensor signal in response to the identification signal; and control means for providing control in response to the sensor signal.
Claim 2
Dependent Claim
59 words
A control system comprising: excitation means for generating an excitation signal; identification means for generating an identification signal in response to the excitation signal, said identification means including at least one monolithic integrated circuit; sensor means for generating a sensor signal in response to the identification signal; and control means for providing control in response to the sensor signal.
Claim 3
Dependent Claim
20 words
The system as set forth in claim 1 above further comprising means for mounting said identification means on an animal.
Claim 4
Dependent Claim
28 words
The system as set forth in claim 1 above wherein said identification means includes passive transponder means for generating the identification signal in response to the excitation signal.
Claim 5
Dependent Claim
18 words
The system as set forth in claim 1 above wherein said integrated circuit is a CMOS integrated circuit.
Claim 6
Dependent Claim
41 words
The system as set forth in claim 1 above wherein said identification means includes means for generating a time division identification signal and wherein said sensor means includes means for processing the time division identification signal to generate the sensor signal.
Claim 7
Dependent Claim
56 words
The system as set forth in claim 1 above wherein said excitation means includes means for generating the excitation signal at a first time, wherein said identification means includes means for generating the identification signal at a second time, and wherein at least a portion of the identification signal is not coincident with the excitation signal.
Claim 8
Dependent Claim
22 words
The system as set forth in claim 1 above wherein the excitation signal and the identification signal are frequency division multiplexed signals.
Claim 9
Dependent Claim
22 words
The system as set forth in claim 1 above wherein the excitation signal and the identification signal are time division multiplexed signals.
Claim 10
Dependent Claim
25 words
The system as set forth in claim 1 above wherein said system is an electronic lock and key system for controlling access of a human.
Claim 11
Dependent Claim
20 words
The system as set forth in claim 9 above wherein said control means includes means for controlling a door lock.
Claim 12
Dependent Claim
22 words
The system as set forth in claim 9 above wherein said identification means is arranged as an electronic key for a human.
Claim 13
Dependent Claim
71 words
An electronic lock and key system comprising: interrogating means for generating an interrogating signal; passive key means for generating a transponder signal in response to the interrogating signal; sensor means for generating a sensor signal in response to the transponder signal; signal processing means for generating a lock control signal in response to the sensor signal; and lock control means for controlling a lock in response to the lock control signal.
Claim 14
Dependent Claim
71 words
An electronic lock and key system comprising: interrogating means for generating an interrogating signal; passive key means for generating a transponder signal in response to the interrogating signal; sensor means for generating a sensor signal in response to the transponder signal; signal processing means for generating a lock control signal in response to the sensor signal; and lock control means for controlling a lock in response to the lock control signal.
Claim 15
Dependent Claim
67 words
The system as set forth in claim 12 above wherein said interrogating means includes means for generating an oscillatory interrogating signal, wherein said passive key means includes means for storing the oscillatory signal and means for generating an oscillatory transponder signal in response to the stored interrogating signal, and wherein said sensor means includes means for generating the sensor signal in response to the oscillatory transponder signal.
Claim 16
Dependent Claim
29 words
The system as set forth in claim 12 above wherein said signal processor means includes means for detecting the transponder signal in response to a phase related characteristic thereof.
Claim 17
Dependent Claim
29 words
The system as set forth in claim 12 above wherein said signal processing means includes means for detecting the transponder signal in response to a time related characteristic thereof.
Claim 18
Dependent Claim
29 words
The system as set forth in claim 12 above wherein said signal processing means includes means for detecting the transponder signal in response to a frequency related characteristic thereof.
Claim 19
Dependent Claim
35 words
The system as set forth in claim 12 above wherein said signal processing means includes phase sensitive means for generating the lock control signal in response to a phase related characteristic of the sensor signal.
Claim 20
Dependent Claim
32 words
The system as set forth in claim 12 above wherein said passive key means includes means for mounting on an animal and wherein said output means includes means for controlling an animal.
Claim 21
Dependent Claim
35 words
The system as set forth in claim 12 above wherein said passive key means includes means for storing the interrogating signal and means for generating the transponder signal in response to the stored interrogating signal.
Claim 22
Dependent Claim
41 words
The system as set forth in claim 19 above wherein said interrogating signal generating means includes an electronic oscillator circuit, wherein said oscillatory signal storing means includes a transponder tuned circuit, and wherein said sensor means includes a sensor tuned circuit.
Claim 23
Dependent Claim
48 words
The system as set forth in claim 20 above wherein said transponder tuned circuit includes transponder tuning means being tuned to the frequency of the oscillatory interrogating signal and wherein said sensor tuned circuit includes sensor tuning means being tuned to the frequency of the oscillatory interrogating signal.
Claim 24
Dependent Claim
60 words
The system as set forth in claim 12 above wherein said interrogating means includes means for generating an oscillatory interrogating signal having a first frequency, wherein said passive key means includes oscillator means for generating an oscillatory transponder signal having a second frequency in response to the interrogating signal, and wherein the first frequency is different from the second frequency.
Claim 25
Dependent Claim
30 words
The system as set forth in claim 22 above wherein said first frequency is less than one thousand hertz and wherein said second frequency is greater than one thousand hertz.
Claim 26
Dependent Claim
35 words
The system as set forth in claim 22 above wherein said first frequency is equal to the frequency of a 60 hertz power signal and wherein said second frequency is greater than one thousand hertz.
Claim 27
Dependent Claim
17 words
The system as set forth in claim 24 above wherein said second frequency is a radio frequency.
Claim 28
Dependent Claim
56 words
A door control system comprising: excitation means for generating an excitation signal; key means for generating a key signal in response to the excitation signal; control means for controlling a door in response to the key signal; and a door to an inhabited building for controlling access of a human under control of said control means.
Claim 29
Dependent Claim
56 words
A door control system comprising: excitation means for generating an excitation signal; key means for generating a key signal in response to the excitation signal; control means for controlling a door in response to the key signal; and a door to an inhabited building for controlling access of a human under control of said control means.
Claim 30
Dependent Claim
31 words
The system as set forth in claim 26 above wherein said key means comprises means for generating the key signal without a self-contained power supply being included with said key means.
Claim 31
Dependent Claim
24 words
The key means as set forth in claim 26 above comprising means for generating the key signal without dependence on a self-contained power supply.
Claim 32
Dependent Claim
24 words
The system as set forth in claim 26 above wherein said key means generates the key signal without reliance on a self-contained power source.
Claim 33
Dependent Claim
34 words
The key means as set forth in claim 26 above comprising means for storing energy in response to the excitation signal and means for generating the key signal in response to the stored energy.
Claim 34
Dependent Claim
38 words
The key means as set forth in claim 26 above comprising rectification means for generating a rectified signal in response to the excitation signal and circuit means for generating the key signal in response to the rectified signal.
Claim 35
Dependent Claim
63 words
The system as set forth in claim 26 above wherein the excitation signal is an oscillatory signal and wherein said key means comprises means for generating an induced oscillatory signal in response to the oscillatory excitation signal, means for generating a rectified signal in response to the induced oscillatory signal, and means for generating the key signal in response to the rectified signal.
Claim 36
Dependent Claim
59 words
The system as set forth in claim 32 above wherein the oscillatory excitation signal has a first frequency characteristic, wherein the key signal is an oscillatory signal having a second frequency characteristic, wherein the first frequency characteristic is different from the second frequency characteristic, and wherein said key means includes an oscillator circuit for generating the oscillatory key signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |