Patent US3689704A successfully refreshed from Google Patents.
US3689704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant current output controlled repeater insertion
Assignee: U S Holding Co Inc
•
Filing: 1969-12-17
•
Granted: 1972-09-05
•
Expires: 1989-12-17
Abstract
Abstract Individual voice frequency repeaters may be associated with any telephone connection, as required. More particularly, the lines involved in the connection are supplied by a constant current output (CCO) device. When the output of the CCO device reaches the level of voltage which indicates the line requires a given signal level gain, a switching access network operates to connect a repeater in the pool to the particular line requiring that level gain. If the required level is reached on both the calling and called line, the repeater output is increased.
Inventors
- 👤 Richard E Wadding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:20
CPC Classifications
H; H04; H04Q; H04Q3/00; H04M; H04M3/00; H04M3/42; H04M3/56
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
80 words
A telephone system comprising calling and called stations interconnected by switching equipment, means for energizing said stations from constant current sources within said equipment, one of said sources being connected to energize said called station, a plurality of voice repeaters associated with said switching equipment and control means in said switching equipment responsive to a high current demand condition at either of said constant current sources for selectively connecting an idle one of said voice repeaters to said interconnected stations.
Claim 2
Dependent Claim
80 words
A telephone system comprising calling and called stations interconnected by switching equipment, means for energizing said stations from constant current sources within said equipment, one of said sources being connected to energize said called station, a plurality of voice repeaters associated with said switching equipment and control means in said switching equipment responsive to a high current demand condition at either of said constant current sources for selectively connecting an idle one of said voice repeaters to said interconnected stations.
Claim 3
Dependent Claim
34 words
The system of claim 1, wherein said control means is responsive to a high current demand condition at both of said sources for increasing the amplitude of the output of said connected voice repeater.
Claim 4
Dependent Claim
60 words
The system of claim 1, wherein there is associated with each of said sources a series circuit including a first pole of a battery, a booster battery, a constant current output device, and a winding on a battery feed relay; said winding being disposed across the conductors of the connected station for connection to the opposite pole of said battery.
Claim 5
Dependent Claim
75 words
The system of claim 1 wherein a plurality of subscriber station lines extend outwardly from a central office which includes the switching equipment, said lines having different current carrying characteristics, and means comprising the constant current source connected to the station of each line for maintaining predetermined current to said line regardless of the characteristics of the line, and wherein some of said lines are multi-gauge lines and other of said lines are uni-gauge lines.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |