US3392243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way speech amplifier
Assignee: Gylling and Co AB
•
Filing: 1963-06-18
•
Granted: 1968-07-09
•
Expires: 1983-06-18
Abstract
No abstract record available.
Inventors
- 👤 Skoog Karl Ivar Lennart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:04
CPC Classifications
H; H04; H04M; H04M9/00; H04M9/001; H04B; H04B3/00; H04B3/02; H04B3/20; H04M9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
IN A TWO-WAY SPEECH AMPLIFIER, TWO SIMILAR AMPLIFIER CHANNELS, AN AUTOMATICALLY OPERATING CONTROL DEVICE FOR EACH CHANNEL, SAID CONTROL DEVICE BEING ADAPTED, UNDER THE INFLUENCE OF A SIGNAL VOLTAGE WHICH IS APPLIED TO THE INPUT OF THE CHANNEL, TO WHICH THE CONTROL DEVICE BELONGS, TO INCREASE THE AMPLIFICATION IN SUCH CHANNEL FROM A MODERATE VALUE OF REST AMPLIFICATION TO AN OPERATING VALUE, AND TO DECREASE THE AMPLIFICATION IN THE OTHER CHANNEL FROM A VALUE CORRESPONDING TO THE TEST AMPLIFICATION TO A SMALLER VALUE, AN OUTPUT POINT IN EACH CHANNEL FOR TAKING OUT A PART OF THE SIGNAL VOLTAGE PASSING SAID CHANNEL TO SUPPLY SAID PART TO THE CONTROL DEVICE OF SAID CHANNEL, MEANS IN SAID CONTROL DEVICE CONVERTING SAID PART OF SIGNAL VOLTAGE TO A RECTIFIED CONTROL VOLTAGE, MEANS FOR SUPPLYING SAID CONTROL VOLTAGE TO TWO CONTROLLABLE AMPLIFIER STAGES IN SAID CHANNEL TO WHICH THE CONTROL DEVICE BELONGS AS WELL AS TO CONTROLLABLE ATTENUATION STAGES IN THE OTHER AMPLIFIER BOTH OF SAID AMPLIFIER STAGES BEING ADAPTED, UPON THE SUPPLY OF SAID CONTROL VOLTAGE, TO BRING ABOUT AN INCREASE OF THE AMPLIFICATION OF THE SIGNAL VOLTAGE PASSING SAID STAGES, ONE OF SAID CONTROLLABLE AMPLIFIER STAGES BEING LOCATED BEFORE AND THE OTHER STAGE AFTER SAID OUTPUT POINT.
Claim 2
Dependent Claim
205 words
IN A TWO-WAY SPEECH AMPLIFIER, TWO SIMILAR AMPLIFIER CHANNELS, AN AUTOMATICALLY OPERATING CONTROL DEVICE FOR EACH CHANNEL, SAID CONTROL DEVICE BEING ADAPTED, UNDER THE INFLUENCE OF A SIGNAL VOLTAGE WHICH IS APPLIED TO THE INPUT OF THE CHANNEL, TO WHICH THE CONTROL DEVICE BELONGS, TO INCREASE THE AMPLIFICATION IN SUCH CHANNEL FROM A MODERATE VALUE OF REST AMPLIFICATION TO AN OPERATING VALUE, AND TO DECREASE THE AMPLIFICATION IN THE OTHER CHANNEL FROM A VALUE CORRESPONDING TO THE TEST AMPLIFICATION TO A SMALLER VALUE, AN OUTPUT POINT IN EACH CHANNEL FOR TAKING OUT A PART OF THE SIGNAL VOLTAGE PASSING SAID CHANNEL TO SUPPLY SAID PART TO THE CONTROL DEVICE OF SAID CHANNEL, MEANS IN SAID CONTROL DEVICE CONVERTING SAID PART OF SIGNAL VOLTAGE TO A RECTIFIED CONTROL VOLTAGE, MEANS FOR SUPPLYING SAID CONTROL VOLTAGE TO TWO CONTROLLABLE AMPLIFIER STAGES IN SAID CHANNEL TO WHICH THE CONTROL DEVICE BELONGS AS WELL AS TO CONTROLLABLE ATTENUATION STAGES IN THE OTHER AMPLIFIER BOTH OF SAID AMPLIFIER STAGES BEING ADAPTED, UPON THE SUPPLY OF SAID CONTROL VOLTAGE, TO BRING ABOUT AN INCREASE OF THE AMPLIFICATION OF THE SIGNAL VOLTAGE PASSING SAID STAGES, ONE OF SAID CONTROLLABLE AMPLIFIER STAGES BEING LOCATED BEFORE AND THE OTHER STAGE AFTER SAID OUTPUT POINT.
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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |