Patent US3621143A successfully refreshed from Google Patents.
US3621143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current-controlled voltage booster for telephone systems
Assignee: Lorain Products Corp
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Filing: 1969-04-04
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Granted: 1971-11-16
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Expires: 1989-04-04
Abstract
Abstract A voltage booster circuit for telephone systems utilizing reverse battery supervision. First and second switches control the connection of respective auxiliary sources in series between a central office battery and a subscriber circuit. The conduction of said switches are controlled in accordance with the polarity with which the central office battery is connected to the subscriber circuit to connect between the central office battery and the subscriber circuit that auxiliary source which is in power-aiding relationship to the central office battery. The conduction period of one of the switches is made to predominate over the conduction period of the other during dialing and ringing so as to facilitate the transmission of dial pulses and the generation of a DC boost for energizing a trip relay during ringing.
Inventors
- 👤 Charles William Chambers Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:20
CPC Classifications
H; H04; H04M; H04M19/00; H04M19/001; H04M19/006
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
181 words
In a voltage-boosting arrangement for telephone systems utilizing reverse battery supervision, in combination, central office terminal means and subscriber circuit terminal means, a plurality of switching circuit means each having a power circuit and a control circuit, means for connecting the power circuits of said switching circuit means between said central office and subscriber circuit terminal means, voltage booster source means, means for connecting said voltage booster source means in series with the power circuits of respective switching circuit means whereby the conduction of at least one of said switching circuit means connects a voltage booster source means with a predetermined polarity between said central office and subscriber circuit terminal means, means for connecting the control circuits of said switching circuit means between said central office and subscriber circuit terminal means, holding current conducting means for maintaining a flow of current through a predetermined one of said switching circuit means, means for connecting said holding current conducting means across the circuit including the power circuit of said predetermined one of said switching circuit means and the respective voltage booster source means.
Claim 2
Dependent Claim
181 words
In a voltage-boosting arrangement for telephone systems utilizing reverse battery supervision, in combination, central office terminal means and subscriber circuit terminal means, a plurality of switching circuit means each having a power circuit and a control circuit, means for connecting the power circuits of said switching circuit means between said central office and subscriber circuit terminal means, voltage booster source means, means for connecting said voltage booster source means in series with the power circuits of respective switching circuit means whereby the conduction of at least one of said switching circuit means connects a voltage booster source means with a predetermined polarity between said central office and subscriber circuit terminal means, means for connecting the control circuits of said switching circuit means between said central office and subscriber circuit terminal means, holding current conducting means for maintaining a flow of current through a predetermined one of said switching circuit means, means for connecting said holding current conducting means across the circuit including the power circuit of said predetermined one of said switching circuit means and the respective voltage booster source means.
Claim 3
Dependent Claim
180 words
In a voltage-boosting arrangement for telephone systems utilizing reverse battery supervision, in combination, central office terminal means and subscriber circuit terminal means, first and second DC voltage booster source means, first switching circuit means for connecting said first DC voltage booster source means with a first polarity between said central office and subscriber circuit terminal means, second switching circuit means for connecting said second DC voltage booster source means with a second polarity between said central office and subscriber circuit terminal means, a power circuit and a control circuit in said first and said second switching circuit means, control current conducting means, means for connecting said control current conducting means to said central office and subscriber circuit terminal means through the control circuits of said first and second switching circuit means, holding current-conducting means for maintaining a flow of current through a predetermined one of said switching circuit means, means for connecting said holding current conducting means across the circuit including the power circuit of said predetermined one of said switching circuit means aNd the respective voltage booster source means.
Claim 4
Dependent Claim
180 words
In a voltage-boosting arrangement for telephone systems utilizing reverse battery supervision, in combination, central office terminal means and subscriber circuit terminal means, first and second DC voltage booster source means, first switching circuit means for connecting said first DC voltage booster source means with a first polarity between said central office and subscriber circuit terminal means, second switching circuit means for connecting said second DC voltage booster source means with a second polarity between said central office and subscriber circuit terminal means, a power circuit and a control circuit in said first and said second switching circuit means, control current conducting means, means for connecting said control current conducting means to said central office and subscriber circuit terminal means through the control circuits of said first and second switching circuit means, holding current-conducting means for maintaining a flow of current through a predetermined one of said switching circuit means, means for connecting said holding current conducting means across the circuit including the power circuit of said predetermined one of said switching circuit means aNd the respective voltage booster source means.
Claim 5
Dependent Claim
334 words
In a voltage-boosting arrangement for telephone systems utilizing reverse battery supervision, in combination, central office terminal means and subscriber circuit terminal means, first and second source current responsive conducting means, first and second controlled conducting means, a control circuit and a power circuit in each of said conducting means, means for connecting the power circuit of said first source current responsive conducting means and the control circuit of said first controlled conducting means between said central office and subscriber circuit terminal means, means for connecting the control circuit of said first source current responsive conducting means and the power circuit of said first controlled conducting means between said central office and subscriber circuit terminal means, means for connecting the power circuit of said second source current responsive conducting means and the control circuit of said second controlled conducting means between said subscriber circuit and central office terminal means, means for connecting the control circuit of said second source current responsive conducting means and the power circuit of said second controlled conducting means between said subscriber circuit and central office terminal means, first switching circuit means including said first source current responsive conducting means and said first controlled conducting means, second switching circuit means including said second source current responsive conducting means and said second controlled conducting means, first and second voltage booster source means, means for connecting said voltage booster source means in series with respective switching circuit means whereby the conduction of said switching circuit means connects a voltage booster source means with a predetermined polarity between said central office and subscriber circuit terminal means, means for connecting the control circuits of said source current responsive conducting means between said central office and subscriber circuit terminal means, holding current conducting means for maintaining a flow of current through a predetermined one of said switching circuit means, means for connecting said holding current conducting means across the circuit including said predetermined one of said switching circuit means and the respective voltage booster source means.
Claim 6
Dependent Claim
334 words
In a voltage-boosting arrangement for telephone systems utilizing reverse battery supervision, in combination, central office terminal means and subscriber circuit terminal means, first and second source current responsive conducting means, first and second controlled conducting means, a control circuit and a power circuit in each of said conducting means, means for connecting the power circuit of said first source current responsive conducting means and the control circuit of said first controlled conducting means between said central office and subscriber circuit terminal means, means for connecting the control circuit of said first source current responsive conducting means and the power circuit of said first controlled conducting means between said central office and subscriber circuit terminal means, means for connecting the power circuit of said second source current responsive conducting means and the control circuit of said second controlled conducting means between said subscriber circuit and central office terminal means, means for connecting the control circuit of said second source current responsive conducting means and the power circuit of said second controlled conducting means between said subscriber circuit and central office terminal means, first switching circuit means including said first source current responsive conducting means and said first controlled conducting means, second switching circuit means including said second source current responsive conducting means and said second controlled conducting means, first and second voltage booster source means, means for connecting said voltage booster source means in series with respective switching circuit means whereby the conduction of said switching circuit means connects a voltage booster source means with a predetermined polarity between said central office and subscriber circuit terminal means, means for connecting the control circuits of said source current responsive conducting means between said central office and subscriber circuit terminal means, holding current conducting means for maintaining a flow of current through a predetermined one of said switching circuit means, means for connecting said holding current conducting means across the circuit including said predetermined one of said switching circuit means and the respective voltage booster source means.
Claim 7
Dependent Claim
180 words
In a voltage booster arrangement for telephone systems utilizing reverse battery supervision, in combination, central office terminal means and subscriber circuit terminal means, first and second switching circuit means each having a power circuit and a control circuit, means for connecting the power circuits of said switching circuit means between said central office and subscriber circuit terminal means, first and second voltage booster source means, means for connecting said voltage booster source means in series with the power circuits of respective switching circuit means, means for connecting the control circuits of said switching circuit means between said central office and subscriber circuit terminal means, first and second reverse current bypass means for bypassing current around predetermined ones of said switching circuit means, means for connecting said reverse current bypass means in series with the power circuits of respective switching circuit means, means for connecting said first reverse current bypass means across the control circuit of said second switching circuit means and means for connecting said second reverse current bypass means across the control circuit of said first switching circuit means.
Claim 8
Dependent Claim
180 words
In a voltage booster arrangement for telephone systems utilizing reverse battery supervision, in combination, central office terminal means and subscriber circuit terminal means, first and second switching circuit means each having a power circuit and a control circuit, means for connecting the power circuits of said switching circuit means between said central office and subscriber circuit terminal means, first and second voltage booster source means, means for connecting said voltage booster source means in series with the power circuits of respective switching circuit means, means for connecting the control circuits of said switching circuit means between said central office and subscriber circuit terminal means, first and second reverse current bypass means for bypassing current around predetermined ones of said switching circuit means, means for connecting said reverse current bypass means in series with the power circuits of respective switching circuit means, means for connecting said first reverse current bypass means across the control circuit of said second switching circuit means and means for connecting said second reverse current bypass means across the control circuit of said first switching circuit means.
Claim 9
Dependent Claim
220 words
In a voltage-boosting arrangement for telephone systems utilizing reverse battery supervision, in combination, central office terminal means and subscriber circuit terminal means, first and second switching circuit means each having a power circuit and a control circuit, first and second voltage booster source means, means for connecting a first end of the power cirCuit of said first switching circuit means to said central office terminal means, means for connecting said first voltage booster source means between said subscriber circuit terminal means and the other end of the power circuit of said first switching circuit means, means for connecting a first end of the power circuit of said second switching circuit means to said subscriber circuit terminal means, means for connecting said second voltage booster source means between said central office terminal means and the other end of the power circuit of said second switching circuit means, means for connecting the control circuits of said first and second switching circuit means between said central office and subscriber circuit terminal means, a holding current conducting means for maintaining a flow of current through a predetermined one of said switching circuit means, means for connecting said holding current conducting means across the circuit including the power circuit of said predetermined one of said switching circuit means and the respective voltage booster source means.
Claim 10
Dependent Claim
220 words
In a voltage-boosting arrangement for telephone systems utilizing reverse battery supervision, in combination, central office terminal means and subscriber circuit terminal means, first and second switching circuit means each having a power circuit and a control circuit, first and second voltage booster source means, means for connecting a first end of the power cirCuit of said first switching circuit means to said central office terminal means, means for connecting said first voltage booster source means between said subscriber circuit terminal means and the other end of the power circuit of said first switching circuit means, means for connecting a first end of the power circuit of said second switching circuit means to said subscriber circuit terminal means, means for connecting said second voltage booster source means between said central office terminal means and the other end of the power circuit of said second switching circuit means, means for connecting the control circuits of said first and second switching circuit means between said central office and subscriber circuit terminal means, a holding current conducting means for maintaining a flow of current through a predetermined one of said switching circuit means, means for connecting said holding current conducting means across the circuit including the power circuit of said predetermined one of said switching circuit means and the respective voltage booster source means.
Claim 11
Dependent Claim
91 words
In combination with a voltage-boosting arrangement as set forth in claim 1, capacitance means, means for connecting said capacitance means between the control circuits of said switching circuit means, first unidirectional conducting means; means for connecting said first unidirectional conducting means, the control circuit of one of said switching circuit means, said capacitance means and said holding current conducting means in a closed current-conducting path; second unidirectional conducting means; means for connecting said second unidirectional conducting means, said capacitance means and said holding current conducting means in a closed current-conducting path.
Claim 12
Dependent Claim
72 words
In combination with a voltage-boosting arrangement as set forth in claim 1, capacitance means, means for connecting said capacitance means across said holding current conducting means through the control circuit of said predetermined one of said switching circuit means when said capacitance means is charged with a first polarity and means for connecting said capacitance means across said holding current conducting means when said capacitance means is charged with a second polarity.
Claim 13
Dependent Claim
82 words
In combination with a voltage-boosting arrangement as set forth in claim 3, capacitance means, means for connecting said capacitance means between the control circuits of said source current responsive conducting means, a plurality of resistance means, means for connecting one of said resistance means in parallel with said capacitance means and means for connecting another of said resistance means between the control circuit of one of said source current responsive conducting means and the power circuit of the respective controlled conducting means.
Claim 14
Dependent Claim
143 words
In combination with a voltage-boosting arrangement as set forth in claim 3, capacitance means, means for connecting said capacitance means between the control circuits of said source current responsive conducting means, a plurality of resistance means, means for connecting one of said resistance means across said capacitance means, means for connecting another of said resistance means between the control circuit of one of said source current responsive conducting means and the power circuit of the respective controlled conducting means, first unidirectional conducting means, means for connecting said first unidirectional conducting means, the control circuit of one of said source current responsive conducting means, said capacitance means and said holding current conducting means in a closed current-carrying path, second unidirectional conducting means, means for connecting said second unidirectional conducting means, said capacitance means and said holding current conducting means in a closed current-carrying path.
Claim 15
Dependent Claim
131 words
In combination with a voltage-boosting arrangement as set forth in claim 4, capacitance means, means for connecting said capacitance means between the control circuits of said swiTching circuit means, holding current conducting means for maintaining a flow of current through a predetermined one of said switching circuit means, means for connecting said capacitance means to one end of said holding current conducting means through the control circuit of one of said switching circuit means, means for connecting said capacitance means to the other end of said holding current conducting means through one of said reverse current bypass means when said capacitance means is charged with a first polarity and means for connecting said capacitance means across said holding current conducting means when said capacitance means is charged with a second polarity.
Claim 16
Dependent Claim
459 words
In a voltage-boosting arrangement for telephone systems utilizing reverse battery supervision, in combination, central office terminal means and subscriber circuit terminal means, first and second source responsive conducting means, first and second controlled conducting means, a control circuit and a power circuit in each of said conducting means, means for connecting the power circuit of said first source responsive conducting means between said central office and subscriber circuit terminal means through the control circuit of said first controlled conducting means, means for connecting the control circuit of said first source responsive conducting means between said central office and subscriber circuit terminal means through the power circuit of said first controlled conducting means, means for connecting the power circuit of said second source responsive conducting means between said subscriber circuit and central office terminal means through the control circuit of said second controlled conducting means, means for connecting the control circuit of said second source responsive conducting means between said subscriber circuit and central office terminal means through the power circuit of said second controlled conducting means, first and second voltage booster source means, means for connecting said first voltage booster source means between, said central office and subscriber circuit terminals through said first source responsive conducting means and through said first controlled conducting means to establish a first boost voltage polarity, means for connecting said second voltage booster source means between said central office and subscriber circuit terminal means through said second source responsive conducting means and through said second controlled conducting means to establish a second boost voltage polarity, means for connecting the control circuits of said source responsive conducting means between said central office and subscriber circuit terminals, first reverse current bypass means for conducting current through said first voltage booster source means and for reverse biasing the control circuit of said second source responsive conducting means, second reverse current bypass means for conducting current through said second voltage booster source means and for reverse biasing the control circuit of said first source responsive conducting means, means for connecting said first reverse current bypass means across the control circuit of said second source responsive conducting means and means for connecting said second reverse current bypass means across the control circuit of said first source responsive conducting means. Claim 12. In combination with a voltage-boosting arrangement as set forth in claim 11, capacitance means, means for connecting said capacitance means between the control circuits of said source responsive conducting means, a plurality of resistance means, means for connecting one of said resistance means across said capacitance means, and means for connecting another of said resistance means between the control circuit of one of said source responsive conducting means and the power circuit of the respective controlled conducting 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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |