US3597546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical coupling system for data communication equipment
Assignee: Philips North America LLC
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Filing: 1967-09-11
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Granted: 1971-08-03
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Expires: 1987-09-11
Abstract
Abstract An acoustical coupling system is connected to data communication equipment to provide acoustical coupling to an ordinary telephone handset. The coupling system has a modulator and a demodulator. Gating means are provided to render the modulator and demodulator operative when the telephone handset is positioned for acoustical coupling to the system.
Inventors
- 👤 Scott R Zehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:04
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
234 words
A system for coupling data communication equipment having an input for receiving information and an output for sending information to a telephone handset having an earpiece and a mouthpiece, comprising: a. system input means adapted to be connected to a data communication information output and system output means adapted to be connected to a data communication information input; b. means for providing an acoustical input coupling from a telephone handset earpiece and means for providing an acoustical output coupling to a telephone handset mouthpiece; c. a demodulator having an input connected to said acoustical input coupling means and an output connected to said system output; d. first time delay means; e. first gating means, connected to said demodulator and having an input adapted to be operated in response to a telephone handset being positioned on said acoustical coupling means, for rendering said demodulator operative, said first gating means having a second input, said first time delay means connected to said second input for operating said second input in response to a signal at said acoustical input coupling means; f. a modulator having an input connected to said system input and an output connected to said acoustical output coupling means; g. and second gating means, connected to said modulator and having an input adapted to be operated in response to a telephone handset being positioned on said acoustical coupling means, for rendering said modulator operative.
Claim 2
Independent Claim
234 words
A system for coupling data communication equipment having an input for receiving information and an output for sending information to a telephone handset having an earpiece and a mouthpiece, comprising: a. system input means adapted to be connected to a data communication information output and system output means adapted to be connected to a data communication information input; b. means for providing an acoustical input coupling from a telephone handset earpiece and means for providing an acoustical output coupling to a telephone handset mouthpiece; c. a demodulator having an input connected to said acoustical input coupling means and an output connected to said system output; d. first time delay means; e. first gating means, connected to said demodulator and having an input adapted to be operated in response to a telephone handset being positioned on said acoustical coupling means, for rendering said demodulator operative, said first gating means having a second input, said first time delay means connected to said second input for operating said second input in response to a signal at said acoustical input coupling means; f. a modulator having an input connected to said system input and an output connected to said acoustical output coupling means; g. and second gating means, connected to said modulator and having an input adapted to be operated in response to a telephone handset being positioned on said acoustical coupling means, for rendering said modulator operative.
Claim 3
Dependent Claim
20 words
The system of claim 1 further comprising second time delay means connected between said second gating means and said modulator.
Claim 4
Dependent Claim
40 words
The system of claim 2 wherein said demodulator includes means for suppressing harmonic frequencies which represent information sent by the data communication equipment and which are in the vicinity of frequencies which represent information received by the data communication equipment.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |