US3987247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data signalling unit for telephone systems
Assignee: FIZER WILLIAM C 4606 PENNSYLVANIA AVENUE NE ROANOKE VIRGINIA
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Filing: 1975-12-12
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Granted: 1976-10-19
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Expires: 1995-12-12
Abstract
Abstract A data signalling system for in-house telephone systems of either the rotary dial or the tone dial type responds to conventional digit defining dial signals. Control gates respond to conventional trunk relay signal patterns to trigger various logic functions in conjunction with trunk seize, dialing and hang-up. A numeric printer is fed digital signals from logic circuitry which has accumulated and stored the dialed data and is capable of presenting numeric and alpha display.
Inventors
- 👤 William C. Fizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/02; H04M11/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
172 words
A data signalling system operable through an in-house telephone system that includes a plurality of area telephones each having a telephone line, a plurality of trunk lines, and central telephone switching means operable to selectively control connection of the telephone lines to the trunk lines, said signalling system having input digit clock means connected to produce a first digit clock signal in response to selection of one of the trunk lines by any selected one of the area telephones and connected to produce a sequential digit clock signal in response to each subsequently dialed digit received from said trunk, logic means responsive to each digit clock signal to receive from the selected trunk line each sequentially transmitted set of conventional digit defining telephone dial signals transmitted by the selected area telephone and to convert each set to a separate corresponding set of digital signals representative of the corresponding dialed digit, and utilization means responsive to each separate set of digital signals to provide read-out representative of said sets of telephone dial signals.
Claim 2
Dependent Claim
172 words
A data signalling system operable through an in-house telephone system that includes a plurality of area telephones each having a telephone line, a plurality of trunk lines, and central telephone switching means operable to selectively control connection of the telephone lines to the trunk lines, said signalling system having input digit clock means connected to produce a first digit clock signal in response to selection of one of the trunk lines by any selected one of the area telephones and connected to produce a sequential digit clock signal in response to each subsequently dialed digit received from said trunk, logic means responsive to each digit clock signal to receive from the selected trunk line each sequentially transmitted set of conventional digit defining telephone dial signals transmitted by the selected area telephone and to convert each set to a separate corresponding set of digital signals representative of the corresponding dialed digit, and utilization means responsive to each separate set of digital signals to provide read-out representative of said sets of telephone dial signals.
Claim 3
Dependent Claim
17 words
A data signalling system as defined in claim 1 and wherein said utilization means is a printer.
Claim 4
Dependent Claim
64 words
A data signalling system as defined in claim 1 and wherein said logic means includes means for storing each set of digital signals and said utilization means being responsive when the logic means converts a pre-selected one of the sets of conventional telephone dial signals to a corresponding set of digital signals to provide a display representative of the complete set of digital signals.
Claim 5
Dependent Claim
58 words
A data signalling system as defined in claim 1 and wherein said logic means includes means for storing each set of digital signals and said utilization means being connected to receive the sets of digital signals stored in the logic means and being responsive to a signal derived from the selected trunk line to produce the digital read-out.
Claim 6
Dependent Claim
66 words
A data signalling system as defined in claim 1 and wherein said logic means includes means for storing each set of digital signals and wherein said utilization means comprises a printer connected to receive the stored sets of digital signals from the logic means and responsive to a signal from the selected trunk line to produce a display representative of the complete set of digital signals.
Claim 7
Dependent Claim
53 words
A data signalling system as defined in claim 1 wherein said signalling system has means for presenting a signal pattern corresponding to conventional A and B trunk relay signals associated with selection of the trunk and wherein said input means is responsive to said signal pattern to produce said first digit clock signal.
Claim 8
Dependent Claim
56 words
A data signalling system as defined in claim 1 wherein said signalling system has means for presenting a signal pattern corresponding to conventional A and B trunk relay signals associated with selection of the trunk and control gate means responsive to said signal pattern to operate in pre-determined timed relation to the selection of the trunk.
Claim 9
Dependent Claim
21 words
A data signalling system as defined in claim 7 and including answer tone generating means responsive to said control gate means.
Claim 10
Dependent Claim
59 words
A data signalling system as defined in claim 1 wherein said signalling system has means for presenting a signal pattern corresponding to conventional A, B and C trunk relay signals associated with disconnection of the selected trunk and a control gate means responsive to said signal pattern to operate in pre-determined timed relation to the disconnection of the trunk.
Claim 11
Dependent Claim
53 words
A data signalling system as defined in claim 1 wherein said signalling system has means for presenting a signal pattern corresponding to conventional A, B and C trunk relay signals of the digit defining type generated in a rotary dial telephone system and wherein said logic means is responsive to said signal pattern.
Claim 12
Dependent Claim
77 words
A data signalling system as defined in claim 10 and wherein said logic means includes digit enable counter means responsive to each digit clock signal from said input means, pulse clock gate means responsive to said signal pattern to generate a number of pulses representative of the dialed digit, counter means responsive to said digit enable counter means and said pulse clock gate means to present, separately, for each digit dialed, the corresponding set of digital signals.
Claim 13
Dependent Claim
42 words
A data signalling system as defined in claim 10 and wherein said logic means includes tone dial detection and decoding means responsive to each set of tone dial signals received from the selected trunk to present a corresponding set of digital signals.
Claim 14
Dependent Claim
51 words
A data signalling system as defined in claim 1 wherein said signalling system has means for presenting a signal pattern corresponding to conventional digit defining tone dial signals and wherein said logic means includes detecting and decoding means responsive to each signal pattern to present a corresponding set of digital signals.
Claim 15
Dependent Claim
73 words
A data signalling system as defined in claim 1 and wherein said utilizing means is a printer, said system including digital time clock means for presenting sets of digital signals representative of time of day data, multiplexing means to selectively present to the printer sets of digital signals derived from the clock means and the logic means, and gate means responsive to a signal from the trunk line for controlling the multiplexing means.
Claim 16
Dependent Claim
69 words
A data signalling system as defined in claim 1 and including memory means to store sets of digital signals, gating means responsive to pre-determined sets of digital signals from said logic means to load the same into the memory means, multiplexing means to selectively present to the utilization means sets of digital signals derived from the memory means and the logic means, and means for controlling the multiplexing means.
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) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |