US3132213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic volume control system for a dictating machine and the like
Assignee: Dictaphone Corp
•
Filing: 1961-01-30
•
Granted: 1964-05-05
•
Expires: 1981-01-30
Abstract
No abstract record available.
Inventors
- 👤 Douglas E Taylor
- 👤 William F Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:41
CPC Classifications
H; H03; H03G; H03G7/00; H03G7/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
AN AUTOMATIC VOLUME CONTROL ARRANGEMENT FOR A DICTATING MACHINE AND THE LIKE, SAID ARRANGEMENT COMPRISING A RECORDING AMPLIFIER, A VOICE OPERATED RELAY, MEANS TO APPLY AN INPUT AUDIO SIGNAL TO SAID AMPLIFIER AND RELAY, FEEDBACK BIAS MEANS RESPONSIVE TO THE OUTPUT SIGNAL FROM SAID AMPLIFIER TO AUTOMATICALLY CONTROL THE GAIN THEREOF, MEANS INCLUDING A FIRST SWITCH CONTROLLED BY SAID RELAY FOR INITIATING A RECORDING OPERATION, AND MEANS INCLUDING A SECOND SWITCH CONTROLLED BY SAID RELAY FOR CLAMPING THE GAIN OF SAID AMPLIFIER AT AN INTERMEDIATE VALUE INDEPENDENTLY OF SAID BIAS MEANS, WHEREBY WHEN SAID RELAY IS INITIALLY OPERATED THE GAIN OF SAID AMPLIFIER WILL BE SET TO RECORD AT A DESIRED LEVEL AND THEREAFTER THIS LEVEL WILL BE MAINTAINED AUTOMATICALLY.
Claim 2
Dependent Claim
120 words
AN AUTOMATIC VOLUME CONTROL ARRANGEMENT FOR A DICTATING MACHINE AND THE LIKE, SAID ARRANGEMENT COMPRISING A RECORDING AMPLIFIER, A VOICE OPERATED RELAY, MEANS TO APPLY AN INPUT AUDIO SIGNAL TO SAID AMPLIFIER AND RELAY, FEEDBACK BIAS MEANS RESPONSIVE TO THE OUTPUT SIGNAL FROM SAID AMPLIFIER TO AUTOMATICALLY CONTROL THE GAIN THEREOF, MEANS INCLUDING A FIRST SWITCH CONTROLLED BY SAID RELAY FOR INITIATING A RECORDING OPERATION, AND MEANS INCLUDING A SECOND SWITCH CONTROLLED BY SAID RELAY FOR CLAMPING THE GAIN OF SAID AMPLIFIER AT AN INTERMEDIATE VALUE INDEPENDENTLY OF SAID BIAS MEANS, WHEREBY WHEN SAID RELAY IS INITIALLY OPERATED THE GAIN OF SAID AMPLIFIER WILL BE SET TO RECORD AT A DESIRED LEVEL AND THEREAFTER THIS LEVEL WILL BE MAINTAINED AUTOMATICALLY.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |