US3301955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone amplifier
Assignee: Prototypes Inc
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Filing: 1963-05-14
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Granted: 1967-01-31
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Expires: 1983-05-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Clarence J Clements
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:17
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/21; H04M1/215; H04M1/60; H04M1/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A TELEPHONE AMPLIFIER DEVICE FOR USE WITH A TELEPHONE RECEIVER HAVING A FRONT FACE AND A DIAPHRAGM THEREIN ADJACENT SAID FRONT FACE AND DEFINING A REFERENCE PLANE, SAID AMPLIFIER COMPRISING: A BODY MEANS FOR RELEASABLY HOLDING SAID BODY WITH ONE SURFACE THEREOF IN FIXED POSITION AGAINST SAID FRONT FACE; A MAGNETIC PICK-UP COIL IN SAID BODY ADJACENT SAID ONE SURFACE AND FIXED THEREIN WITH ITS POLAR AXIS ARRANGED AT AN OBLIQUE ANGLE TO SAID REFERENCE PLANE; AMPLIFYING MEANS IN SAID BODY; A MINIATURE SPEAKER IN SAID BODY AND ARRANGED TO RADIATE SOUND FROM THE SIDE OF SAID BODY OPPOSITE SAID ONE SURFACE; AND CIRCUIT MEANS CONNECTING SAID PICK-UP COIL TO THE INPUT OF SAID AMPLIFYING MEANS AND CONNECTING THE OUTPUT OF SAID AMPLIFYING MEANS TO SAID SPEAKER, SAID SPEAKER INCLUDING AN ELECTROMAGNET ENERGIZED BY SAID AMPLIFYING MEANS OUTPUT; AND FERROMAGNETIC SHIELD MEANS BETWEEN SAID SPEAKER AND SAID AMPLIFYING MEANS AND BETWEEN SAID PICK-UP COIL AND SAID AMPLIFYING MEANS WHEREBY TO MINIMIZE FEEDBACK COUPLING BETWEEN SAID SPEAKER AND SAID PICK-UP COIL.
Claim 2
Dependent Claim
170 words
A TELEPHONE AMPLIFIER DEVICE FOR USE WITH A TELEPHONE RECEIVER HAVING A FRONT FACE AND A DIAPHRAGM THEREIN ADJACENT SAID FRONT FACE AND DEFINING A REFERENCE PLANE, SAID AMPLIFIER COMPRISING: A BODY MEANS FOR RELEASABLY HOLDING SAID BODY WITH ONE SURFACE THEREOF IN FIXED POSITION AGAINST SAID FRONT FACE; A MAGNETIC PICK-UP COIL IN SAID BODY ADJACENT SAID ONE SURFACE AND FIXED THEREIN WITH ITS POLAR AXIS ARRANGED AT AN OBLIQUE ANGLE TO SAID REFERENCE PLANE; AMPLIFYING MEANS IN SAID BODY; A MINIATURE SPEAKER IN SAID BODY AND ARRANGED TO RADIATE SOUND FROM THE SIDE OF SAID BODY OPPOSITE SAID ONE SURFACE; AND CIRCUIT MEANS CONNECTING SAID PICK-UP COIL TO THE INPUT OF SAID AMPLIFYING MEANS AND CONNECTING THE OUTPUT OF SAID AMPLIFYING MEANS TO SAID SPEAKER, SAID SPEAKER INCLUDING AN ELECTROMAGNET ENERGIZED BY SAID AMPLIFYING MEANS OUTPUT; AND FERROMAGNETIC SHIELD MEANS BETWEEN SAID SPEAKER AND SAID AMPLIFYING MEANS AND BETWEEN SAID PICK-UP COIL AND SAID AMPLIFYING MEANS WHEREBY TO MINIMIZE FEEDBACK COUPLING BETWEEN SAID SPEAKER AND SAID PICK-UP COIL.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |