US3207857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodynamic transducer
Assignee: US Philips Corp
•
Filing: 1960-05-18
•
Granted: 1965-09-21
•
Expires: 1980-05-18
Abstract
No abstract record available.
Inventors
- 👤 Poutot Georges Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:58
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/12; H04R9/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A VIBRATING SYSTEM FOR A STEREOPHONIC PHONOGRAPHY RECORD CUTTING HEAD AND PICK-UP APAPRATUS COMPRISING MAGNETIC MEANS HAVING POLE FACES FOR PRODUCING A HOMOGENEOUS FIELD WITHIN THE GAP DEFINED BY SAID POLE FACES, A PLATE-SHAPED ELEMENT HAVING LINEAR ORTHOGONAL CURRENT PATHS WITHIN SAID GAP, SAID ELEMENT LYING IN A PLANE PAR-/ ALLEL WITH SAID POLE FACES, MEANS MOUNTING SAID ELEMENT WITH THE MAIN SURFACES THEREOF PARALLEL WITH THE GAP DEFINING SURFACES OF SAID MAGNETIC MEANS, MEANS FOR RESTRICTING MOVEMENT OF SAID ELEMENT WITHIN SAID PLANE AND NORMAL TO THE MAGNETIC LINES OF FORCE IN SAID GAP, MEANS FOR BIASING SAID ELEMENT TO A STATE OF EQUILIBRIUM IN SAID PLANE, AND ELECTRIC CURRENT CONDUCTOR MEANS CONNECTED WITH SAID CURRENT PATHS.
Claim 2
Dependent Claim
118 words
A VIBRATING SYSTEM FOR A STEREOPHONIC PHONOGRAPHY RECORD CUTTING HEAD AND PICK-UP APAPRATUS COMPRISING MAGNETIC MEANS HAVING POLE FACES FOR PRODUCING A HOMOGENEOUS FIELD WITHIN THE GAP DEFINED BY SAID POLE FACES, A PLATE-SHAPED ELEMENT HAVING LINEAR ORTHOGONAL CURRENT PATHS WITHIN SAID GAP, SAID ELEMENT LYING IN A PLANE PAR-/ ALLEL WITH SAID POLE FACES, MEANS MOUNTING SAID ELEMENT WITH THE MAIN SURFACES THEREOF PARALLEL WITH THE GAP DEFINING SURFACES OF SAID MAGNETIC MEANS, MEANS FOR RESTRICTING MOVEMENT OF SAID ELEMENT WITHIN SAID PLANE AND NORMAL TO THE MAGNETIC LINES OF FORCE IN SAID GAP, MEANS FOR BIASING SAID ELEMENT TO A STATE OF EQUILIBRIUM IN SAID PLANE, AND ELECTRIC CURRENT CONDUCTOR MEANS CONNECTED WITH SAID CURRENT PATHS.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |