US3748397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable remote broadcasting telephone system
Assignee: Individual
•
Filing: 1972-05-10
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Granted: 1973-07-24
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Expires: 1992-05-10
Abstract
Abstract A portable remote broadcasting telephone system for relaying a high quality sound reproduction to a distant broadcasting station over telephone lines. The system comprises a telephone, a high quality microphone, solid state amplification circuitry contained within the telephone housing and a portable carrying case. A double-pole double-throw switch selectively connects the amplification circuitry and the telephone to the telephone lines and, irrespective of the position of the switch, permits the presence of an incoming call to be detected. The microphone is coupled to the amplifier through a plug and jack connection, which, when made, prevents the inadvertant use of the telephone handset in disconnecting the telephone.
Inventors
- 👤 C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:19
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/60
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
309 words
A portable, remote broadcasting telephone system for use in relaying a high quality reproduction of a sound to a radio broadcasting station over conventional telephone lines, said system comprising in combination: a telephone that includes a handset, a housing having means for holding said handset, means for electrically disconnecting said telephone from the telephone lines, said disconnecting means being actuated by the placement of said handset on said holding means thereby electrically disconnecting said telephone, and means for indicating an incoming call; means for connecting said telephone to the telephone lines; a microphone; solid state amplification circuitry comprising an operational amplifier, means connectable to an external power supply for energizing said amplifier, means for applying an input signal to said amplifier, said means including an interference filter, means for controlling the gain of said amplifier, means for attenuating the output signal and impedance matching means connected between said amplifier and said attenuating means for matching the combined impedance of said attenuating means and the telephone lines; means for connecting said microphone to said amplifier, said means including a conductor connected at one end to said microphone, a plug connected to the other end of said conductor, a jack mounted on said telephone housing for receiving said plug, said jack being located on said housing such that said plug, when inserted into said jack prevents said handset from actuating said disconnecting means, and a conductor connecting said jack to said amplifier; switch means for selectively connecting said amplification circuitry and said telephone to said telephone connecting means and for connecting said incoming call indicating means to said telephone lines when said switch means is positioned to connect said amplification circuitry to the telephone lines; and a portable carrying case for containing said telephone, said telephone connecting means, said microphone, said amplification circuitry, said microphone connecting means and said switch means.
Claim 2
Dependent Claim
309 words
A portable, remote broadcasting telephone system for use in relaying a high quality reproduction of a sound to a radio broadcasting station over conventional telephone lines, said system comprising in combination: a telephone that includes a handset, a housing having means for holding said handset, means for electrically disconnecting said telephone from the telephone lines, said disconnecting means being actuated by the placement of said handset on said holding means thereby electrically disconnecting said telephone, and means for indicating an incoming call; means for connecting said telephone to the telephone lines; a microphone; solid state amplification circuitry comprising an operational amplifier, means connectable to an external power supply for energizing said amplifier, means for applying an input signal to said amplifier, said means including an interference filter, means for controlling the gain of said amplifier, means for attenuating the output signal and impedance matching means connected between said amplifier and said attenuating means for matching the combined impedance of said attenuating means and the telephone lines; means for connecting said microphone to said amplifier, said means including a conductor connected at one end to said microphone, a plug connected to the other end of said conductor, a jack mounted on said telephone housing for receiving said plug, said jack being located on said housing such that said plug, when inserted into said jack prevents said handset from actuating said disconnecting means, and a conductor connecting said jack to said amplifier; switch means for selectively connecting said amplification circuitry and said telephone to said telephone connecting means and for connecting said incoming call indicating means to said telephone lines when said switch means is positioned to connect said amplification circuitry to the telephone lines; and a portable carrying case for containing said telephone, said telephone connecting means, said microphone, said amplification circuitry, said microphone connecting means and said switch means.
Claim 3
Dependent Claim
24 words
A remote broadcasting telephone system in accordance with claim 1 wherein said amplification circuitry and said switch means are contained within said telephone housing.
Claim 4
Dependent Claim
88 words
A remote broadcasting telephone system in accordance with claim 1 and further including an internal emergency power supply connected to said amplification circuitry in parallel with said external power supply, said internal power supply including a diode connected in series with a battery such that said diode is back biased when said amplifier is connected to said external power supply thereby preventing said battery from supplying current to said amplifier and such that said battery energizes said amplifier when said amplifier is disconnected from said external power supply.
Claim 5
Dependent Claim
17 words
A remote broadcasting telephone system in accordance with claim 1 wherein said indicating means comprises a light.
Claim 6
Dependent Claim
24 words
A remote broadcasting telephone system in accordance with claim 1 and further including a headset monitoring means for monitoring the output of said amplifier.
Claim 7
Dependent Claim
45 words
A remote broadcasting telephone system in accordance with claim 5 wherein said carrying case contains a form having a first receptacle therein for holding said telephone, a second receptacle therein for holding said microphone and a third receptacle therein for holding said headset monitoring means.
Claim 8
Dependent Claim
276 words
A portable, remote broadcasting telephone system for use in relaying a high quality reproduction of a sound to a radio broadcasting station over conventional telephone lines, said system comprising in combination: a telephone that includes a handset, a housing having means for holding said handset, means for electrically disconnecting said telephone from the telephone lines, said disconnecting means being actuated by the placement of said handset on said holding means thereby electrically disconnecting said telephone, and means for indicating an incoming call; means for connecting said telephone to the telephone lines; a microphone; solid state amplification circuity including an operational amplifier and means connectable to an external power supply for energizing said amplifier; means for connecting said microphone to said amplifier, said means including a conductor connected at one end to said microphone, a plug connected to the other end of said conductor, a jack mounted on said telephone housing for receiving said plug, said jack being located on said housing such that said plug when inserted into said jack prevents said handset from actuating said disconnecting means, and a conductor connecting said jack to said amplifier; switch means for selectively connecting said amplification circuitry and said telephone to said telephone connecting means and for connecting said incoming call indicating means to said telephone lines when said switch means is positioned to connect said amplification circuitry to the telephone lines; headset monitoring means for monitoring the output of said amplifier; and a portable carrying case containing a form having a first receptacle therein for holding said telephone, a second receptacle therein for holding said microphone and a third receptacle therein for holding said headset monitoring means.
Claim 9
Dependent Claim
276 words
A portable, remote broadcasting telephone system for use in relaying a high quality reproduction of a sound to a radio broadcasting station over conventional telephone lines, said system comprising in combination: a telephone that includes a handset, a housing having means for holding said handset, means for electrically disconnecting said telephone from the telephone lines, said disconnecting means being actuated by the placement of said handset on said holding means thereby electrically disconnecting said telephone, and means for indicating an incoming call; means for connecting said telephone to the telephone lines; a microphone; solid state amplification circuity including an operational amplifier and means connectable to an external power supply for energizing said amplifier; means for connecting said microphone to said amplifier, said means including a conductor connected at one end to said microphone, a plug connected to the other end of said conductor, a jack mounted on said telephone housing for receiving said plug, said jack being located on said housing such that said plug when inserted into said jack prevents said handset from actuating said disconnecting means, and a conductor connecting said jack to said amplifier; switch means for selectively connecting said amplification circuitry and said telephone to said telephone connecting means and for connecting said incoming call indicating means to said telephone lines when said switch means is positioned to connect said amplification circuitry to the telephone lines; headset monitoring means for monitoring the output of said amplifier; and a portable carrying case containing a form having a first receptacle therein for holding said telephone, a second receptacle therein for holding said microphone and a third receptacle therein for holding said headset monitoring means.
Claim 10
Dependent Claim
24 words
A remote broadcasting telephone system in accordance with claim 7 wherein said amplification circuitry and said switch means are contained within said telephone housing.
Claim 11
Dependent Claim
88 words
A remote broadcasting telephone system in accordance with claim 7 and further including an internal emergency power supply connected to said amplification circuitry in parallel with said external power supply, said internal power supply including a diode connected in series with a battery such that said diode is back biased when said amplifier is connected to said external power supply thereby preventing said battery from supplying current to said amplifier and such that said battery energizes said amplifier when said amplifier is disconnected from said external power supply.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |