Patent US3639696A successfully refreshed from Google Patents.
US3639696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistate voltage booster circuit for telephone systems
Assignee: Lorain Products Corp
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Filing: 1969-04-01
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Granted: 1972-02-01
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Expires: 1989-04-01
Abstract
Abstract A circuit for increasing the flow of telephone line current in telephone systems which utilize reverse battery supervision and the grounding of the telephone line at the subscriber station for supervisory or control purposes. Power booster networks connected in series with respective sides of a telephone line each include a semiconductor switch for controlling the flow of current toward the subscriber station and a semiconductor switch for controlling the flow of current away from the subscriber station. A DC auxiliary source is connected in series with one switch in each power booster network. The conduction of the different switches is controlled in accordance with the voltages present in the telephone system to direct telephone line current flow through that one of the DC auxiliary sources which is in power aiding relationship to said current flow despite changes in the direction of current flow in one or both sides of the telephone line.
Inventors
- 👤 Charles W Chambers Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:44
CPC Classifications
H; H04; H04M; H04M19/00; H04M19/001; H04M19/006
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
191 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including first and second terminal means for disposition in series with one conductor of a subscriber line, each booster network also including first and second switch means each having a regenerative switching characteristic and each having a triggered circuit and a triggering circuit, means for connecting the triggered circuit of said first switch means in series, current conducting relationship between said first and second terminal means, means for connecting the triggered circuit of said second switch means in series, current conducting relationship between said second and first terminal means, booster voltage source means, means for connecting said booster voltage source means in series with the triggered circuit of one of said switch means, means for connecting the triggering circuit of said first switch means to each of the subscriber line conductors and means for connecting the triggering circuit of said second switch means between ground and one of said terminal means.
Claim 2
Dependent Claim
191 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including first and second terminal means for disposition in series with one conductor of a subscriber line, each booster network also including first and second switch means each having a regenerative switching characteristic and each having a triggered circuit and a triggering circuit, means for connecting the triggered circuit of said first switch means in series, current conducting relationship between said first and second terminal means, means for connecting the triggered circuit of said second switch means in series, current conducting relationship between said second and first terminal means, booster voltage source means, means for connecting said booster voltage source means in series with the triggered circuit of one of said switch means, means for connecting the triggering circuit of said first switch means to each of the subscriber line conductors and means for connecting the triggering circuit of said second switch means between ground and one of said terminal means.
Claim 3
Dependent Claim
31 words
In a voltage boosting arrangement as set forth in claim 1, unidirectional current bypass means and means for connecting said unidirectional current bypass means between said second and first terminal means.
Claim 4
Dependent Claim
31 words
In a voltage boosting arrangement as set forth in claim 1, trip relay biasing means and means for connecting said trip relay biasing means between the conductors of the subscriber line.
Claim 5
Dependent Claim
58 words
In a voltage boosting arrangement as set forth in claim 1, a voltage dropping diode, means for connecting said voltage dropping diode in current conducting relationship between said second switch means and one of said terminal means and means for connecting said voltage dropping diode in reverse biasing relationship to the triggering circuit of said first switch means.
Claim 6
Dependent Claim
193 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including first and second terminal means for disposition in series with one conductor of a subscriber line, each booster network also including first and second switch means each having a regenerative switching characteristic and each having a triggered circuit and a triggering circuit, means for connecting the triggered circuit of said first swiTch means in series, current conducting relationship between said first and second terminal means, means for connecting the triggered circuit of said second switch means in series, current conducting relationship between said second and first terminal means, booster voltage source means, means for connecting said booster voltage source means in series with the triggered circuit of one of said switch means, means for connecting the triggering circuit of said first switch means to each of the conductors of the subscriber line, means for connecting the triggering circuit of said second switch means between ground and one of the subscriber line conductors.
Claim 7
Dependent Claim
193 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including first and second terminal means for disposition in series with one conductor of a subscriber line, each booster network also including first and second switch means each having a regenerative switching characteristic and each having a triggered circuit and a triggering circuit, means for connecting the triggered circuit of said first swiTch means in series, current conducting relationship between said first and second terminal means, means for connecting the triggered circuit of said second switch means in series, current conducting relationship between said second and first terminal means, booster voltage source means, means for connecting said booster voltage source means in series with the triggered circuit of one of said switch means, means for connecting the triggering circuit of said first switch means to each of the conductors of the subscriber line, means for connecting the triggering circuit of said second switch means between ground and one of the subscriber line conductors.
Claim 8
Dependent Claim
199 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including first and second terminal means for disposition in series with one conductor of a subscriber line, each booster network also including first and second switch means each having a regenerative switching characteristic and each having a triggered circuit and a triggering circuit, means for connecting the triggered circuit of said first switch means in series, current conducting relationship between said first and second terminal means, means for connecting the triggered circuit of said second switch means in series, current conducting relationship between said second and first terminal means, booster voltage source means, means for connecting said booster voltage source means in series with the triggered circuit of one of said first switch means, means for connecting the triggering circuit of said first switch means between said first and second terminal means, means for connecting the triggering circuit of said second switch means between the grounded pole of the central office battery and one of the subscriber line conductors.
Claim 9
Dependent Claim
199 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including first and second terminal means for disposition in series with one conductor of a subscriber line, each booster network also including first and second switch means each having a regenerative switching characteristic and each having a triggered circuit and a triggering circuit, means for connecting the triggered circuit of said first switch means in series, current conducting relationship between said first and second terminal means, means for connecting the triggered circuit of said second switch means in series, current conducting relationship between said second and first terminal means, booster voltage source means, means for connecting said booster voltage source means in series with the triggered circuit of one of said first switch means, means for connecting the triggering circuit of said first switch means between said first and second terminal means, means for connecting the triggering circuit of said second switch means between the grounded pole of the central office battery and one of the subscriber line conductors.
Claim 10
Dependent Claim
226 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes and which are subject to the grounding of the subscriber line at locations outside the central office, in combination, a pair of booster networks each having first and second terminal means for disposition in series with the respective subscriber line conductors, a first and second switch means in each of said booster networks, each of said switch means having a regenerative switching characteristic and having a triggering circuit, means for connecting said first switch means between the first and second terminal means of respective booster networks to control the flow of subscriber line current toward the subscriber station, means for connecting said second switch means between the second and first terminal means of respective booster networks to control the flow of subscriber line current away from the subscriber station, booster voltage source means, means for connecting said booster voltage source means in series with respective second switch means in power aiding relationship to current flowing therethrough, means for connecting the triggering circuits of said first and second switch means to each of the conductors of the subscriber line and means for connecting the triggering circuits of said second switch means between ground and respective subscriber line conductors.
Claim 11
Dependent Claim
226 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes and which are subject to the grounding of the subscriber line at locations outside the central office, in combination, a pair of booster networks each having first and second terminal means for disposition in series with the respective subscriber line conductors, a first and second switch means in each of said booster networks, each of said switch means having a regenerative switching characteristic and having a triggering circuit, means for connecting said first switch means between the first and second terminal means of respective booster networks to control the flow of subscriber line current toward the subscriber station, means for connecting said second switch means between the second and first terminal means of respective booster networks to control the flow of subscriber line current away from the subscriber station, booster voltage source means, means for connecting said booster voltage source means in series with respective second switch means in power aiding relationship to current flowing therethrough, means for connecting the triggering circuits of said first and second switch means to each of the conductors of the subscriber line and means for connecting the triggering circuits of said second switch means between ground and respective subscriber line conductors.
Claim 12
Dependent Claim
226 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes and which are subject to the grounding of the subscriber line at locations outside the central office, in combination, a pair of booster networks each having first and second terminal means for disposition in series with the respective subscriber line conductors, a first and second switch means in each of said booster networks, each of said switch means having a regenerAtive switching characteristic and having a triggering circuit, means for connecting said first switch means between the first and second terminal means of respective booster networks to control the flow of subscriber line current toward the subscriber station, means for connecting said second switch means between the second and first terminal means of respective booster networks to control the flow of subscriber line current away from the subscriber station, booster voltage source means, means for connecting said booster voltage source means in series with respective second switch means in power aiding relationship to current flowing therethrough, means for connecting the triggering circuits of said first switch means between the first and second terminal means of respective booster networks and means for connecting the triggering circuits of said second switch means between ground and respective subscriber line conductors.
Claim 13
Dependent Claim
226 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes and which are subject to the grounding of the subscriber line at locations outside the central office, in combination, a pair of booster networks each having first and second terminal means for disposition in series with the respective subscriber line conductors, a first and second switch means in each of said booster networks, each of said switch means having a regenerAtive switching characteristic and having a triggering circuit, means for connecting said first switch means between the first and second terminal means of respective booster networks to control the flow of subscriber line current toward the subscriber station, means for connecting said second switch means between the second and first terminal means of respective booster networks to control the flow of subscriber line current away from the subscriber station, booster voltage source means, means for connecting said booster voltage source means in series with respective second switch means in power aiding relationship to current flowing therethrough, means for connecting the triggering circuits of said first switch means between the first and second terminal means of respective booster networks and means for connecting the triggering circuits of said second switch means between ground and respective subscriber line conductors.
Claim 14
Dependent Claim
300 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including a pair of terminal means for connecting the respective booster network in series with a respective conductor of the subscriber line, each booster network also including a plurality of line-source responsive variable conducting means, a plurality of latching variable conducting means, each of said variable conducting means having a power circuit and a control circuit, means for connecting the power circuit of a first one of said line-source responsive variable conducting means between said terminal means through the control circuit of a first one of said latching variable conducting means, means for connecting the control circuit of said first line-source responsive variable conducting means between said terminal means through the power circuit of said first latching variable conducting means, means for connecting the control circuit of one of said first variable conducting means to each of the conductors of the subscriber line, means for connecting the power circuit of a second one of said line-source responsive variable conducting means between said terminal means through the control circuit of a second one of said latching variable conducting means, means for connecting the control circuit of said second line-source responsive variable conducting means between said terminal means through the power circuit of said second latching variable conducting means, booster voltage source means, means for connecting said booster voltage source means between said terminal means through said second variable conducting means, and means for connecting the control circuit of one of said second variable conducting means to one pole of the central office battery and to one conductor of the subscriber line.
Claim 15
Dependent Claim
300 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including a pair of terminal means for connecting the respective booster network in series with a respective conductor of the subscriber line, each booster network also including a plurality of line-source responsive variable conducting means, a plurality of latching variable conducting means, each of said variable conducting means having a power circuit and a control circuit, means for connecting the power circuit of a first one of said line-source responsive variable conducting means between said terminal means through the control circuit of a first one of said latching variable conducting means, means for connecting the control circuit of said first line-source responsive variable conducting means between said terminal means through the power circuit of said first latching variable conducting means, means for connecting the control circuit of one of said first variable conducting means to each of the conductors of the subscriber line, means for connecting the power circuit of a second one of said line-source responsive variable conducting means between said terminal means through the control circuit of a second one of said latching variable conducting means, means for connecting the control circuit of said second line-source responsive variable conducting means between said terminal means through the power circuit of said second latching variable conducting means, booster voltage source means, means for connecting said booster voltage source means between said terminal means through said second variable conducting means, and means for connecting the control circuit of one of said second variable conducting means to one pole of the central office battery and to one conductor of the subscriber line.
Claim 16
Dependent Claim
46 words
A voltage boosting arrangement as set forth in claim 9 in which said first line-source responsive variable conducting means and said second latching variable conducting means comprise thyristors and in which said second line-source responsive variable conducting and said first latching variable conducting means comprise NPN-transistors.
Claim 17
Dependent Claim
293 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including a pair of terminal means for connecting the respective booster network in series with a respective conductor of the subscriber line, each booster network also including a plurality of line-source responsive variable conducting means, a plurality of latching variable conducting means, each of said variable conducting means having a power circuit and a control circuit, means for connecting the power circuit of a first one of said line-source responsive variable conducting means bEtween said terminal means through the control circuit of a first one of said latching variable conducting means, means for connecting the control circuit of said first line-source responsive variable conducting means between said terminal means through the power circuit of said first latching variable conducting means, means for connecting the control circuit of one of said first variable conducting means between said terminal means, means for connecting the power circuit of a second one of said line-source responsive variable conducting means between said terminal means through the control circuit of a second one of said latching variable conducting means, means for connecting the control circuit of said second line-source responsive variable conducting means between said terminal means through the power circuit of said second latching variable conducting means, booster voltage source means, means for connecting said booster voltage source means between said terminal means through said second variable conducting means, and means for connecting the control circuit of one of said second variable conducting means to one subscriber line conductor and to one pole of the central office battery.
Claim 18
Dependent Claim
293 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including a pair of terminal means for connecting the respective booster network in series with a respective conductor of the subscriber line, each booster network also including a plurality of line-source responsive variable conducting means, a plurality of latching variable conducting means, each of said variable conducting means having a power circuit and a control circuit, means for connecting the power circuit of a first one of said line-source responsive variable conducting means bEtween said terminal means through the control circuit of a first one of said latching variable conducting means, means for connecting the control circuit of said first line-source responsive variable conducting means between said terminal means through the power circuit of said first latching variable conducting means, means for connecting the control circuit of one of said first variable conducting means between said terminal means, means for connecting the power circuit of a second one of said line-source responsive variable conducting means between said terminal means through the control circuit of a second one of said latching variable conducting means, means for connecting the control circuit of said second line-source responsive variable conducting means between said terminal means through the power circuit of said second latching variable conducting means, booster voltage source means, means for connecting said booster voltage source means between said terminal means through said second variable conducting means, and means for connecting the control circuit of one of said second variable conducting means to one subscriber line conductor and to one pole of the central office battery.
Claim 19
Dependent Claim
24 words
A voltage boosting arrangement as set forth in claim 11 including capacitance means and means for connecting said capacitance means between said terminal means.
Claim 20
Dependent Claim
321 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including a pair of terminal means for connecting the respective booster network in series with a respective conductor of the subscriber line, each booster network also including a plurality of line-source responsive variable conducting means, a plurality of latching variable conducting means, each of said variable conducting means having a power circuit and a control circuit, means for connecting the power circuit of a first one of said line-source responsive variable conducting means between said terminal means through the control circuit of a first one of said latching variable conducting means, means for connecting the control circuit of said first line-source responsive variable conducting means between said terminal means through the power circuit of said first latching variable conducting means, means for connecting the power circuit of a second one of said line-source responsive variable conducting means between said terminal means through the control circuit of a second one of said latching variable conducting means, means for connecting the control circuit of said second line-source responsive variable conducting means between said terminal means through the power circuit of said second latching variable conducting means, booster voltage source means, means for connecting said booster voltage source means to each of said terminal means through said second variable conducting means, means for connecting the control circuit of one of said first variable conducting means to each of the conductors of the subscriber line, means for connecting the control circuit of one of said second variable conducting means between the conductors of the subscriber line, and means for connecting the control circuit of one of said first variable conducting means to one subscriber line conductor and to one pole of the central office battery.
Claim 21
Dependent Claim
321 words
In a voltage boosting arrangement for telephone systems which utilize reversals in the connections of a central office battery to the conductors of a subscriber line for supervisory purposes, in combination, a booster network for each conductor; each booster network including a pair of terminal means for connecting the respective booster network in series with a respective conductor of the subscriber line, each booster network also including a plurality of line-source responsive variable conducting means, a plurality of latching variable conducting means, each of said variable conducting means having a power circuit and a control circuit, means for connecting the power circuit of a first one of said line-source responsive variable conducting means between said terminal means through the control circuit of a first one of said latching variable conducting means, means for connecting the control circuit of said first line-source responsive variable conducting means between said terminal means through the power circuit of said first latching variable conducting means, means for connecting the power circuit of a second one of said line-source responsive variable conducting means between said terminal means through the control circuit of a second one of said latching variable conducting means, means for connecting the control circuit of said second line-source responsive variable conducting means between said terminal means through the power circuit of said second latching variable conducting means, booster voltage source means, means for connecting said booster voltage source means to each of said terminal means through said second variable conducting means, means for connecting the control circuit of one of said first variable conducting means to each of the conductors of the subscriber line, means for connecting the control circuit of one of said second variable conducting means between the conductors of the subscriber line, and means for connecting the control circuit of one of said first variable conducting means to one subscriber line conductor and to one pole of the central office battery.
Claim 22
Dependent Claim
46 words
A voltage boosting arrangement as set forth in claim 9 in which said first line-source responsive variable conducting means and said second latching variable conducting means comprise thyristors and in which said second line-source responsive variable conducting and said first latching variable conducting means comprise NPN-transistors.
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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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |