USH118H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesized sound telephone alerting means
Assignee: Nokia Bell Labs
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Filing: 1984-10-11
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Granted: 1986-09-02
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Expires: 2004-10-11
Abstract
Abstract A telephone with electronic telephone alerting circuitry which includes a telephone ringing detector, a sound synthesizer activated by the ringing detector and an amplifier-speaker arrangement responsive to the synthesizer. Whenever ringing is detected, the synthesizer is activated and caused to generate a specific signal sequence programmed into the synthesizer. The synthesized signal is amplified and applied to a transducer, such as a speaker, which produces the alerting sound. The synthesizer comprises a synthesis controlling processor and a memory for storing the parameters of the programmed signal sequence. The memory may be alterable or replaceable.
Inventors
- 👤 Ronald D. Biggs
- 👤 Richard E. Waddell
- 👤 Kenneth B. Woodard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:52
CPC Classifications
H; H04; H04M; H04M19/00; H04M19/02; H04M19/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
97 words
A telephone including tip and ring input leads comprising: a hook switch connected to said tip and ring leads and responsive to user controlled status of said telephone; a ringing detector, connected to said tip and ring leads, for recognizing hailing signals on said tip and ring leads; controller means responsive to said ringing detector and to said hook switch; a read-only-memory for storing a preselected audio message; a synthesizer, responsive to said read-only-memory and to said controller for developing an audio signal representative of said audio message; and means for converting said audio signal to sound.
Claim 2
Dependent Claim
97 words
A telephone including tip and ring input leads comprising: a hook switch connected to said tip and ring leads and responsive to user controlled status of said telephone; a ringing detector, connected to said tip and ring leads, for recognizing hailing signals on said tip and ring leads; controller means responsive to said ringing detector and to said hook switch; a read-only-memory for storing a preselected audio message; a synthesizer, responsive to said read-only-memory and to said controller for developing an audio signal representative of said audio message; and means for converting said audio signal to sound.
Claim 3
Dependent Claim
53 words
The telephone of claim 1 wherein said controller includes an optoisolator connected to said ringing detector followed by an integrated circuit for initiating operation of said synthesizer in response to a detected hailing signal and for terminating operation of said synthesizer in response to an off hook status indication by said hook switch.
References Cited (Backward Citations)
US4371751A
Cited
US4480153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |