US4208545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secrecy system
Assignee: AT&T Teletype Corp
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Filing: 1954-05-24
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Granted: 1980-06-17
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Expires: 1974-05-24
Abstract
Abstract 1. In a system of secret telegraph communication, an incoming channel over which miscellaneous matter intelligence signals are periodically received, an outgoing channel susceptible of operating at a higher speed than said incoming channel, a cipher unit interconnecting said channels, said unit comprising a signal storage device, means controlled by said storage device for periodically generating special supervisory signals for compensating for the speed difference between said channels, a fan circuit connected to said storage device, a ciphering maze connected to said fan circuit, means for inserting masking signals during pauses between said periodically received miscellaneous matter intelligence signals, means for inserting said supervisory signals upon transitions from said received miscellaneous intelligence signals to said masking signals and vice versa, and means operable automatically upon encipherment of all said signals for transmitting the enciphered signals over said outgoing channel.
Inventors
- 👤 Walter J. Zenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:57
CPC Classifications
H; H04; H04L; H04L9/00; H04L9/36; H04L2209/00; H04L2209/04
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
138 words
In a system of secret telegraph communication, an incoming channel over which miscellaneous matter intelligence signals are periodically received, an outgoing channel susceptible of operating at a higher speed than said incoming channel, a cipher unit interconnecting said channels, said unit comprising a signal storage device, means controlled by said storage device for periodically generating special supervisory signals for compensating for the speed difference between said channels, a fan circuit connected to said storage device, a ciphering maze connected to said fan circuit, means for inserting masking signals during pauses between said periodically received miscellaneous matter intelligence signals, means for inserting said supervisory signals upon transitions from said received miscellaneous intelligence signals to said masking signals and vice versa, and means operable automatically upon encipherment of all said signals for transmitting the enciphered signals over said outgoing channel.
Claim 2
Dependent Claim
138 words
In a system of secret telegraph communication, an incoming channel over which miscellaneous matter intelligence signals are periodically received, an outgoing channel susceptible of operating at a higher speed than said incoming channel, a cipher unit interconnecting said channels, said unit comprising a signal storage device, means controlled by said storage device for periodically generating special supervisory signals for compensating for the speed difference between said channels, a fan circuit connected to said storage device, a ciphering maze connected to said fan circuit, means for inserting masking signals during pauses between said periodically received miscellaneous matter intelligence signals, means for inserting said supervisory signals upon transitions from said received miscellaneous intelligence signals to said masking signals and vice versa, and means operable automatically upon encipherment of all said signals for transmitting the enciphered signals over said outgoing channel.
Claim 3
Dependent Claim
143 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressng on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous stream of signals is impressed on said line, means for introducing ultra-codal supervisory signals having marking start intervals indicative of the transitions of signaling from said sources of signals, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source.
Claim 4
Dependent Claim
143 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressng on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous stream of signals is impressed on said line, means for introducing ultra-codal supervisory signals having marking start intervals indicative of the transitions of signaling from said sources of signals, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source.
Claim 5
Dependent Claim
152 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressng on said signal line at intermittant intervals signals from said first source and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous stream of signals is impressed on said line, means for introducing ultra-codal supervisory signals having marking start intervals indicative of the transitions of signaling from said sources of signals, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means effective under the control of said ultra-codal supervisory signals for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source.
Claim 6
Dependent Claim
152 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressng on said signal line at intermittant intervals signals from said first source and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous stream of signals is impressed on said line, means for introducing ultra-codal supervisory signals having marking start intervals indicative of the transitions of signaling from said sources of signals, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means effective under the control of said ultra-codal supervisory signals for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source.
Claim 7
Dependent Claim
149 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous succession of signals is impressed on said line, means effective automatically in response to transitions of signaling between said sources of signals for introducing ultra-codal supervisory signals having marking start intervals indicative of said transitions, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source.
Claim 8
Dependent Claim
149 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous succession of signals is impressed on said line, means effective automatically in response to transitions of signaling between said sources of signals for introducing ultra-codal supervisory signals having marking start intervals indicative of said transitions, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source.
Claim 9
Dependent Claim
156 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source intervals when no signals from said first source are impressed on said signal line, whereby a continuous succession of signals is impressed on said line, means effective automatically in response to transitions of signaling between said sources of signals for introducing ultra-codal supervisory signals having marking start intervals indicative of said transitions, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means effective under the control of said ultra-codal supervisory signals for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source.
Claim 10
Dependent Claim
156 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source intervals when no signals from said first source are impressed on said signal line, whereby a continuous succession of signals is impressed on said line, means effective automatically in response to transitions of signaling between said sources of signals for introducing ultra-codal supervisory signals having marking start intervals indicative of said transitions, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means effective under the control of said ultra-codal supervisory signals for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source.
Claim 11
Dependent Claim
155 words
In a secret communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals representing derivable permutations of an equal length start-stop permutation code, means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous stream of signals is impressed on said line, means for introducing an ultra-codal signal having a marking start pulse, a marking stop pulse and all marking codal pulses to indicate the transitions of signaling from said sources of signals, means to encipher all of said signals prior to transmission from said sending station, and a receiving station including means for recognizing and deleting said ultra-codal signals and the signals from said second source.
Claim 12
Dependent Claim
155 words
In a secret communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals representing derivable permutations of an equal length start-stop permutation code, means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous stream of signals is impressed on said line, means for introducing an ultra-codal signal having a marking start pulse, a marking stop pulse and all marking codal pulses to indicate the transitions of signaling from said sources of signals, means to encipher all of said signals prior to transmission from said sending station, and a receiving station including means for recognizing and deleting said ultra-codal signals and the signals from said second source.
Claim 13
Dependent Claim
160 words
In a secret communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals representing derivable permutations of a Baudot code, means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous succession of signals is impressed on said line, means for inserting at the transitions of signaling from said sources of signals an ultra-codal signal indicative of said transitions, said ultra-codal signal comprising a marking start pulse, a marking stop pulse and all marking codal pulses, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means for recognizing and deleting said ultra-codal signals and the signals from said second source of signals.
Claim 14
Dependent Claim
160 words
In a secret communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals representing derivable permutations of a Baudot code, means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous succession of signals is impressed on said line, means for inserting at the transitions of signaling from said sources of signals an ultra-codal signal indicative of said transitions, said ultra-codal signal comprising a marking start pulse, a marking stop pulse and all marking codal pulses, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means for recognizing and deleting said ultra-codal signals and the signals from said second source of signals.
Claim 15
Dependent Claim
166 words
In a secret communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals comprising derivable permutations of a Baudot code, means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby an continuous succession of signals is impressed on said line, means for inserting at the transitions of signaling from said sources of signals an ultra-codal signal indicative of said transitions, said ultra-codal signal comprising a marking start pulse, a marking stop pulse and all marking codal pulses, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means effective under the control of said ultra-codal signal for recognizing and deleting said ultra-codal signals and the signals from said second source.
Claim 16
Dependent Claim
166 words
In a secret communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals comprising derivable permutations of a Baudot code, means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby an continuous succession of signals is impressed on said line, means for inserting at the transitions of signaling from said sources of signals an ultra-codal signal indicative of said transitions, said ultra-codal signal comprising a marking start pulse, a marking stop pulse and all marking codal pulses, means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including means effective under the control of said ultra-codal signal for recognizing and deleting said ultra-codal signals and the signals from said second source.
Claim 17
Dependent Claim
167 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous succession of signals is impressed on said line, means for inserting supervisory signals at the points of transition said supervisory signals having marking start intervals of transmission from said sources of signals, means for enciphering all of said signals prior to transmission from said sending station, a receiving station including means effective under the control of said ultra-codal supervisory signals for recognizing and deleting said ultra-codal supervisory signals and the signals from one said second source, and means for deciphering the signals from said first source of signals.
Claim 18
Dependent Claim
167 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous succession of signals is impressed on said line, means for inserting supervisory signals at the points of transition said supervisory signals having marking start intervals of transmission from said sources of signals, means for enciphering all of said signals prior to transmission from said sending station, a receiving station including means effective under the control of said ultra-codal supervisory signals for recognizing and deleting said ultra-codal supervisory signals and the signals from one said second source, and means for deciphering the signals from said first source of signals.
Claim 19
Dependent Claim
169 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous flow of signals is impressed on said line, means for introducing ultra-codal supervisory signals indicative of the transitions of signaling from said sources of signals, said supervisory signals having marking start intervals means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including a receiving distributor and deciphering means for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source, said recognizing means comprising means activated upon the decipherment of said ultra-codal supervisory signals for effectuating said deletion.
Claim 20
Dependent Claim
169 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous flow of signals is impressed on said line, means for introducing ultra-codal supervisory signals indicative of the transitions of signaling from said sources of signals, said supervisory signals having marking start intervals means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including a receiving distributor and deciphering means for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source, said recognizing means comprising means activated upon the decipherment of said ultra-codal supervisory signals for effectuating said deletion.
Claim 21
Dependent Claim
168 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous flow of signals is impressed on said line, means for introducing ultra-codal supervisory signals indicative of the transitions of signaling from said sources of signals, said supervisory signals having marking start intervals means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including a continuously rotating distributor and deciphering means for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source, said recognizing means comprising a relay means controlled by said deciphering means for effectuating said deletion.
Claim 22
Dependent Claim
168 words
In a secret start-stop telegraph communication system, a signal line, a sending station having a first source of signals and a second source of signals, said signals having normal spacing start intervals means for impressing on said signal line at intermittant intervals signals from said first source, and means for impressing on said signal line signals from said second source at all intervals when no signals from said first source are impressed on said signal line, whereby a continuous flow of signals is impressed on said line, means for introducing ultra-codal supervisory signals indicative of the transitions of signaling from said sources of signals, said supervisory signals having marking start intervals means for enciphering all of said signals prior to transmission from said sending station, and a receiving station including a continuously rotating distributor and deciphering means for recognizing and deleting said ultra-codal supervisory signals and the signals from said second source, said recognizing means comprising a relay means controlled by said deciphering means for effectuating said deletion.
Claim 23
Dependent Claim
166 words
In a system of secret telegraph communication, an incoming channel over which bursts of live traffic are periodically received, an outgoing channel susceptible of operating at a higher speed than said incoming channel, a cipher unit interconnecting said channels, said unit comprising a signal storage device having a plurality of storage loops wherein a positive loop condition is indicative of the presence of stored signals and a negative loop condition is indicative of the absence of stored signals, means governed by a negative loop condition in said storage device for generating special supervisory signals for compensating for the speed difference between said channels, means for inserting masking signals during pauses between said periodically received live traffic, means for inserting said supervisory signals upon transitions from said received live traffic to said masking signals and vice versa, means for enciphering all of said signals and traffic, and means operable automatically upon encipherment of all said signals and traffic for transmitting the enciphered signals over said outgoing channel.
Claim 24
Dependent Claim
166 words
In a system of secret telegraph communication, an incoming channel over which bursts of live traffic are periodically received, an outgoing channel susceptible of operating at a higher speed than said incoming channel, a cipher unit interconnecting said channels, said unit comprising a signal storage device having a plurality of storage loops wherein a positive loop condition is indicative of the presence of stored signals and a negative loop condition is indicative of the absence of stored signals, means governed by a negative loop condition in said storage device for generating special supervisory signals for compensating for the speed difference between said channels, means for inserting masking signals during pauses between said periodically received live traffic, means for inserting said supervisory signals upon transitions from said received live traffic to said masking signals and vice versa, means for enciphering all of said signals and traffic, and means operable automatically upon encipherment of all said signals and traffic for transmitting the enciphered signals over said outgoing channel.
References Cited (Backward Citations)
US2406023A
Cited
US2632057A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |