US3851314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic identifying security system
Assignee: Eaton Corp
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Filing: 1973-05-14
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Granted: 1974-11-26
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Expires: 1993-05-14
Abstract
Abstract An electronic identifying security system for use with one or more locks can be actuated only by valid keys that have a pattern of internal electrical conductors capable of applying an authorized permutation of binary signals to a plurality of input conductors of the security apparatus. The security apparatus has a lock opening mechanism and an alarm device. The alarm device is actuated either by application of a binary ''''one'''' signal to an input conductor for which a binary ''''zero'''' is proper, or else by a binary ''''one'''' on at least one but fewer than all of the input conductors for which a binary ''''one'''' is proper. In addition to the foregoing internal conductors, additional internal conductors are permuted to identify the keys in groups and individually. Lost keys can be prevented from working without changing the general combination by reprogramming the apparatus to specifically exclude them. A portion of the system is switchable from a mode of operation in which it excludes individual keys to a mode of operation in which it excludes groups of keys. In a security system that has a plurality of door locks, groups of keys can be made capable of unlocking some doors but not others.
Inventors
- 👤 R Hedin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/20
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
184 words
An electronic identifying apparatus having a device to be unlocked in response to the establishment of a predetermined binary code or codes, a plurality of input conductors including first and second subsets, each conductor of said first and second subset capable of having a signal of first and second binary states respectively established thereon, an alarm device, first circuit means connected with said first subset for producing a first control signal in the absence of said first binary state on at least one conductor of said first subset, second circuit means connected with said second subset for producing a second control signal in the absence of said second binary state on at least one conductor of said second subset, third circuit means connected to receive a binary signal from at least one of said plurality of conductors upon attempted connection of said first and second subsets to said first and second circuit means for producing a third control signal, and combining circuit means for actuating said alarm device upon occurrence of said third control signal and either said first or said second control signals.
Claim 2
Dependent Claim
184 words
An electronic identifying apparatus having a device to be unlocked in response to the establishment of a predetermined binary code or codes, a plurality of input conductors including first and second subsets, each conductor of said first and second subset capable of having a signal of first and second binary states respectively established thereon, an alarm device, first circuit means connected with said first subset for producing a first control signal in the absence of said first binary state on at least one conductor of said first subset, second circuit means connected with said second subset for producing a second control signal in the absence of said second binary state on at least one conductor of said second subset, third circuit means connected to receive a binary signal from at least one of said plurality of conductors upon attempted connection of said first and second subsets to said first and second circuit means for producing a third control signal, and combining circuit means for actuating said alarm device upon occurrence of said third control signal and either said first or said second control signals.
Claim 3
Dependent Claim
77 words
An electronic identifying apparatus as defined in claim 1 and wherein said third circuit means comprises fourth means for making the third circuit means responsive to a binary signal of only said first binary state to produce said third control signal and wherein said combining circuit means comprises logic means for actuating said alarm device either in response to said second control signal or upon a concurrence of said third control signal and said first control signal.
Claim 4
Dependent Claim
34 words
An electronic security apparatus as defined in claim 2 and wherein said fourth circuit means is responsive only to a binary signal on at least one of the input conductors of said first subset.
Claim 5
Dependent Claim
38 words
An electronic security apparatus as defined in claim 1 and further comprising signal delay means connected therein for delaying actuation of said alarm device for a time after binary signals are applied to said plurality of input conductors.
Claim 6
Dependent Claim
116 words
An electronic identifying apparatus for use with valid binary code unlocking devices which establish a first binary code and a second binary code or codes comprising, input circuit means having a plurality of input means on which said binary codes are to be established, first decoding means connected to said input means responsive to said first binary code on said input means for actuating a lock mechanism, second decoding means responsive to said second binary code for overriding the first decoding means to prevent actuation of said mechanism thereby, switching means for selectively enabling and disabling said second decoding means to provide selective actuation of said mechanism by unlocking devices having a pArticular second binary code.
Claim 7
Dependent Claim
116 words
An electronic identifying apparatus for use with valid binary code unlocking devices which establish a first binary code and a second binary code or codes comprising, input circuit means having a plurality of input means on which said binary codes are to be established, first decoding means connected to said input means responsive to said first binary code on said input means for actuating a lock mechanism, second decoding means responsive to said second binary code for overriding the first decoding means to prevent actuation of said mechanism thereby, switching means for selectively enabling and disabling said second decoding means to provide selective actuation of said mechanism by unlocking devices having a pArticular second binary code.
Claim 8
Dependent Claim
65 words
An electronic identifying apparatus as defined in claim 5 and wherein said input circuit means comprises means for receiving various third binary codes for differentiating between individual unlocking devices which establish said second code and wherein said switching means comprises means for switching said second decoding means to be responsive to overrule actuation by every device of said subgroup irrespective of said third binary codes.
Claim 9
Dependent Claim
52 words
An electronic identifying apparatus as defined in claim 6 and wherein said switching means comprises means for switching said second decoding means to be responsive either to overrule actuation by at least one of said third binary codes of an individual device or to overrule actuation by every device of said subgroup.
Claim 10
Dependent Claim
40 words
An electronic identifying apparatus as defined in claim 5 and further comprising means for actuating an alarm device upon establishment of a binary code on said plurality of input means when said code results in nonactuation of said lock mechanism.
Claim 11
Dependent Claim
172 words
An electronic identifying apparatus having a plurality of input conductors upon which a valid code of binary signals must be applied to identify valid devices for actuating an unlocking mechanism and activating an alarm for invalid devices, said apparatus being for use generally with a plurality of said devices, said code including a first group of binary signals for signifying compliance of the devices with a general predetermined permutation and a second group of binary signals for identifying ruled-out devices of the plurality which are to be specifically excluded from actuating the mechanism, comprising first decoding means for automatically examining said first group of signals and for providing a first control signal upon said compliance, second decoding means for automatically examining said second group of binary signals and for producing a second control signal upon identifying ruled-out devices, first combining means for actuating the unlocking mechanism in response to devices that comply are not ruled out, and second combining means for actuating the alarm in response to devices that are ruled out.
Claim 12
Dependent Claim
172 words
An electronic identifying apparatus having a plurality of input conductors upon which a valid code of binary signals must be applied to identify valid devices for actuating an unlocking mechanism and activating an alarm for invalid devices, said apparatus being for use generally with a plurality of said devices, said code including a first group of binary signals for signifying compliance of the devices with a general predetermined permutation and a second group of binary signals for identifying ruled-out devices of the plurality which are to be specifically excluded from actuating the mechanism, comprising first decoding means for automatically examining said first group of signals and for providing a first control signal upon said compliance, second decoding means for automatically examining said second group of binary signals and for producing a second control signal upon identifying ruled-out devices, first combining means for actuating the unlocking mechanism in response to devices that comply are not ruled out, and second combining means for actuating the alarm in response to devices that are ruled out.
Claim 13
Dependent Claim
84 words
An electronic identifying apparatus as defined in claim 9 and wherein said second group has an initial number of binary signals and said second decoding means comprises a multiplicity of separate decoding means for identifying ruled-out devices based on said second group having said initial number of binary signals, and including switching means for combining said separate decoding means into fewer decoding means for identifying fewer ruled-out devices based on said second group having a number of binary signals greater than said initial number.
Claim 14
Dependent Claim
154 words
An electronic identifying apparatus having a device to be unlocked in response to the establishment of a predetermined binary code or codes on a plurality of input conductors including first and second subsets, on each conductor of which a signal of first and second binary states respectively is to be established, means for inhibiting unlocking of the device upon a lock inhibit signal, an alarm device, first combining means connected with said second subset for producing said lock inhibit signal and an alarm control signal in the absence of said second binary state on at least one predetermined conductor of said second subset, and second combining means for actuating said alarm device upon said alarm control signal, said first combining means having means for producing said lock inhibit signal but not said alarm control signal in the absence of said second binary state on at least one other preselected conductor of said second subset.
Claim 15
Dependent Claim
154 words
An electronic identifying apparatus having a device to be unlocked in response to the establishment of a predetermined binary code or codes on a plurality of input conductors including first and second subsets, on each conductor of which a signal of first and second binary states respectively is to be established, means for inhibiting unlocking of the device upon a lock inhibit signal, an alarm device, first combining means connected with said second subset for producing said lock inhibit signal and an alarm control signal in the absence of said second binary state on at least one predetermined conductor of said second subset, and second combining means for actuating said alarm device upon said alarm control signal, said first combining means having means for producing said lock inhibit signal but not said alarm control signal in the absence of said second binary state on at least one other preselected conductor of said second subset.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |