US3694584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preferred customer communication system
Assignee: Individual
•
Filing: 1971-05-28
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Granted: 1972-09-26
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Expires: 1991-05-28
Abstract
Abstract Preferred customer communication system in which trunks available to a regular switching network are selectively connected to preferred customers whether or not these trunks are engaged on a regular customer call. A commandeer doubly coded signal controls a transfer relay. The commandeer signal is in the ''''p out-of n'''' code and the bits 1 and 0 are represented by short and long duration pulses.
Inventors
- 👤 Leon M Gimbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:14
CPC Classifications
H; H04; H04Q; H04Q3/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
An automatic telephone trunk commandeer system for enabling trunks to be selectively switched from a switching network to preferred customers connected to said switching network, the said system consisting of means for generating a trunk commandeer signal and sending said signal on to said trunk, said commandeer signal consisting of a pulse combination of the ''''p out-of n'''' binary code in which a binary digit is represented by short duration pulses and the other binary digit by long duration pulses, means for receiving said pulse combination, means for comparing the duration of the pulses received with a predetermined period and separating the pulses having a duration lesser than said predetermined duration from the pulses having a duration larger than said predetermined duration, means for serially storing according to the combination pulses serial number the long duration pulses, a transfer relay for switching the trunk and a circuit for checking the ''''p out-of n'''' code inserted between said storing means and said transfer relay.
Claim 2
Dependent Claim
163 words
An automatic telephone trunk commandeer system for enabling trunks to be selectively switched from a switching network to preferred customers connected to said switching network, the said system consisting of means for generating a trunk commandeer signal and sending said signal on to said trunk, said commandeer signal consisting of a pulse combination of the ''''p out-of n'''' binary code in which a binary digit is represented by short duration pulses and the other binary digit by long duration pulses, means for receiving said pulse combination, means for comparing the duration of the pulses received with a predetermined period and separating the pulses having a duration lesser than said predetermined duration from the pulses having a duration larger than said predetermined duration, means for serially storing according to the combination pulses serial number the long duration pulses, a transfer relay for switching the trunk and a circuit for checking the ''''p out-of n'''' code inserted between said storing means and said transfer relay.
Claim 3
Dependent Claim
84 words
An automatic telephone trunk commandeer system as set forth in claim 1, in which the trunk conveys regular pulses corresponding to an engagement on a regular customer call and commandeer pulse signals corresponding to an engagement on a preferred customer call, the short duration pulses of the commandeer signal being longer than the regular pulses and the pulse combination receiving means comprises a call time-delayed relay insensitive to the regular pulses and sensitive to the short and long duration pulses of the commandeer signal.
Claim 4
Dependent Claim
137 words
An automatic telephone trunk commandeer system as set forth in claim 1 in which the means for comparing the duration of the pulses received with a predetermined period comprises a relay counter having a plurality of outputs successively energized and advancing at a period which is a submultiple of the predetermined period and a timing relay connected to a selected output of said relay counter which is energized at a time later than said given period and the storing means comprises a relay counter counting the pulses of the ''''p out-of n'''' combination, store relays connected to the output of said relay counter and successively energized thereby and means for selectively inhibiting the energization of said store relays under the control of the timing relay whereby only the store relays corresponding to long duration pulses are energized.
References Cited (Backward Citations)
US2943155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |