US4527016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current regulated pulse dialer with memory retention circuit
Assignee: AG Communication Systems Corp
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Filing: 1983-08-25
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Granted: 1985-07-02
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Expires: 2003-08-25
Abstract
Abstract A current regulated pulse dialer circuit including a memory for storing predetermined sequences of telephone numbers, for use in a loop powered pulse dialing telephone. A first current source is connected to an electronic pulse dialer to provide a high impedance across the telephone line during transmission and interpulse pause conditions and a second current source is connected to an electronic pulse dialer to maintain the integrity of information stored in the memory portion of the dialer circuitry.
Inventors
- 👤 John D. Sublette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:15
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/30; H04M1/31; H04M1/312
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
130 words
A telephone circuit connected to a telephone line, comprising: pulse dialing means; first current regulating means including a first rectifying bridge and a first current regulator connected between said first rectifying bridge and said pulse dialing means; second current regulating means including a second rectifying bridge and a second current regulator connected between said second rectifying bridge and said pulse dialing means and hookswitch means normally in the "ON HOOK" position connecting said telephone line to said second current regulating means, operated to the "OFF HOOK" position to connect said telephone line to said first current regulating means, and said hookswitch means restored to said "ON HOOK" position to disconnect said first current regulating means from said telephone line and reconnect said second current regulating means to said telephone line.
Claim 2
Dependent Claim
130 words
A telephone circuit connected to a telephone line, comprising: pulse dialing means; first current regulating means including a first rectifying bridge and a first current regulator connected between said first rectifying bridge and said pulse dialing means; second current regulating means including a second rectifying bridge and a second current regulator connected between said second rectifying bridge and said pulse dialing means and hookswitch means normally in the "ON HOOK" position connecting said telephone line to said second current regulating means, operated to the "OFF HOOK" position to connect said telephone line to said first current regulating means, and said hookswitch means restored to said "ON HOOK" position to disconnect said first current regulating means from said telephone line and reconnect said second current regulating means to said telephone line.
Claim 3
Dependent Claim
29 words
A telephone circuit as claimed in claim 1, wherein: said pulse dialing means comprise: a pulse dialer integrated circuit including memory means for storing predetermined sequences of calling signals.
Claim 4
Dependent Claim
30 words
A telephone circuit as claimed in claim 2, wherein: said pulse dialing means further includes a key pad connected to said pulse dialer manually operated to control said pulse dialer.
Claim 5
Dependent Claim
37 words
A telephone circuit as claimed in claim 2, wherein: said pulse dialing means further includes switching means connected between said telephone line and said pulse dialer, operated in response to said dialer to pulse said telephone line.
Claim 6
Dependent Claim
15 words
A telephone circuit as claimed in claim 4, wherein: said switching means comprises a transistor.
Claim 7
Dependent Claim
57 words
A telephone circuit as claimed in claim 2, wherein: said telephone circuit further includes a voice and transmission circuit; and said pulse dialing means further include gating means connected between said pulse dialer and said voice and transmission circuit operated in response to said pulse dialer to disconnect said voice and transmission circuit from said telephone line.
Claim 8
Dependent Claim
22 words
A telephone circuit as claimed in claim 2, wherein: said pulse dialing means further include filter means connected across said pulse dialer.
Claim 9
Dependent Claim
15 words
A telephone circuit as claimed in claim 7, wherein: said filter means comprise a capacitor.
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) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |