Patent US4286120A successfully refreshed from Google Patents.
US4286120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current regulated pulse dialer circuit
Assignee: AG Communication Systems Corp
•
Filing: 1979-10-15
•
Granted: 1981-08-25
•
Expires: 1999-10-15
Abstract
Abstract A current regulated pulse dialer circuit for use in a loop powered pulse dialing telephone. A current source is connected to an electronic pulse dialer to provide high impedance across a telephone line during transmission and interpulse pause conditions.
Inventors
- 👤 John D. Sublette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:00
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/30; H04M1/31; H04M1/312
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
A current regulated pulse dialer circuit for use in a pulse dialing telephone, including digit signaling means and a line connection, said pulse dialer circuit comprising: pulse dialing means connected to said digit signaling means and to said line connection, operated in response to a digit signal to decode said digit signal and generate pulses, representative of said digit on said line connection; and a current regulator connected to said pulse dialing means and to said line connection operated to increase the impedance across said line connection through said pulse dialing means.
Claim 2
Dependent Claim
92 words
A current regulated pulse dialer circuit for use in a pulse dialing telephone, including digit signaling means and a line connection, said pulse dialer circuit comprising: pulse dialing means connected to said digit signaling means and to said line connection, operated in response to a digit signal to decode said digit signal and generate pulses, representative of said digit on said line connection; and a current regulator connected to said pulse dialing means and to said line connection operated to increase the impedance across said line connection through said pulse dialing means.
Claim 3
Dependent Claim
63 words
A current regulated pulse dialer circuit as claimed in claim 1, wherein there is further included a voice and transmission circuit, said pulse dialer circuit further comprising: gating means connected to said voice and transmission circuit, said line connection and said pulse dialing means, operated in response to said pulse dialing means to disconnect said voice and transmission circuit from said line connection.
Claim 4
Dependent Claim
16 words
The circuit of claim 1, wherein: said current regulator comprises a transistor connected to a resistor.
Claim 5
Dependent Claim
15 words
The circuit of claim 1, wherein: said pulse dialing means comprise a pulse dialer circuit.
Claim 6
Dependent Claim
20 words
The circuit of claim 4, wherein: said pulse dialing means further comprise a transistor connected to said pulse dialer circuit.
References Cited (Backward Citations)
US3916114A
Cited
US3932707A
Cited
US3973084A
Cited
US3980837A
Cited
US4046971A
Cited
US4081619A
Cited
US4167655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |