Patent US5604798A successfully refreshed from Google Patents.
US5604798A
Expired / Lapsed
US
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Telephone system with automatic volume control
Assignee: Ansell Protective Products Inc
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Filing: 1994-04-18
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Granted: 1997-02-18
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Expires: 2014-04-18
Abstract
Abstract A You Talk Two Phone is provided that is a true two handset telephone device. With conventional telephones, when more than one telephone is bridged to a phone line the amplitude of the incoming and outgoing signals drop as telephones are added. The You Talk Two Phone contains two handsets and circutry that automatically adjusts internal amplifier gain to compensate for the extra handset even when not in use. The invention has audible and visible indicators of incoming calls as well as lamps that indicate when either or both handsets are in use. A jack is provided that allows a conventional phone to plugged in, or an additional You Talk Two Phone.
Inventors
- 👤 John S. Sacchetti
- 👤 Mark J. Sacchetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:47
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/60; H04M1/71; H04M1/715
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
A telephone system comprising: a. a first telephone handset comprising a first earpiece and a first microphone; b. a second telephone handset comprising a second earpiece and a second microphone; c. a first cradle into which said first telephone handset normally fits such that said first cradle is normally in the down position; d. a second cradle into which said second telephone handset normally fits such that said second cradle is normally in the down position; e. dialing means comprising circuitry for dialing a telephone number; f. alerting means comprising circuitry for alerting a user that an incoming telephone call is waiting; g. means for interfacing said two handsets to a telephone trunk line; and h. means comprising circuitry to prevent an increase or decrease in outgoing or incoming volume in response to the lifting of one of said handsets from its cradle or the return of one of said handsets to its cradle.
Claim 2
Dependent Claim
154 words
A telephone system comprising: a. a first telephone handset comprising a first earpiece and a first microphone; b. a second telephone handset comprising a second earpiece and a second microphone; c. a first cradle into which said first telephone handset normally fits such that said first cradle is normally in the down position; d. a second cradle into which said second telephone handset normally fits such that said second cradle is normally in the down position; e. dialing means comprising circuitry for dialing a telephone number; f. alerting means comprising circuitry for alerting a user that an incoming telephone call is waiting; g. means for interfacing said two handsets to a telephone trunk line; and h. means comprising circuitry to prevent an increase or decrease in outgoing or incoming volume in response to the lifting of one of said handsets from its cradle or the return of one of said handsets to its cradle.
Claim 3
Dependent Claim
55 words
A telephone system as recited in claim 1, wherein said circuitry to prevent an increase or decrease in outgoing or incoming volume when one of said handsets is lifted from its cradle or returned to its cradle acts by substituting an electrical analog for the handset when the handset is returned to its respective cradle.
Claim 4
Dependent Claim
47 words
A telephone system as recited in claim 1, wherein said circuitry to prevent an increase or decrease in outgoing or incoming volume when one of said handsets is lifted from its cradle or returned to its cradle acts by varying the phase relationships of two telephone signals.
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) | 2000-02-18 | 2000-08-19 | 2001-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-18 | 2004-08-19 | 2005-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-18 | 2008-08-19 | 2009-02-18 | $7700.00 | Window Closed / Lapsed |