US3172950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position control system
Assignee: —
•
Filing: —
•
Granted: 1965-03-09
•
Expires: 1982-03-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:22
CPC Classifications
G; G08; G08C; G08C21/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
156 words
IN A TELESCRIBER SYSTEM, APPARATUS FOR CONTROLLING THE POSITION AND MOVEMENT OF A PEN ARM, COMPRISING: MEANS FOR DEVELOPING A MAGNETIC FIELD; A MOVABLE COIL ASSEMBLY POSITION WITHIN THE MAGNETIC FIELD AND HAVING A CENTER TAP COUPLED TO A SOURCE OF REFERENCE POTENTIAL; A DIFFERENTIAL AMPLIFIER RECEIVING A CONTROL SIGNAL AND A REFERENCE SIGNAL AND HAVING A PUSH-PULL OUTPUT CIRCUIT COUPLED TO THE COIL ASSEMBLY FOR DEVELOPING OPPOSING INVERSELY VARYING CURRENT SIGNALS IN ADJACENT PORTIONS OF THE COIL DEFINED BY THE CENTER TAP SUCH THAT OPPOSING INVERSELY VARIABLE FORCES ARE DEVELOPED ON THE COIL ASSEMBLY IN RESPONSE TO CHANGES IN THE CONTROL SIGNAL RELATIVE TO THE REFERENCE SIGNAL; MEANS COUPLED TO THE COIL ASSEMBLY FOR MOVING THE PEN ARM IN RESPONSE TO MOVEMENT OF THE COIL ASSEMBLY; A DIFFERENTIAL TRANSFORMER HAVING A PRIMARY WINDING, FIRST AND SECOND SECONDARY WINDINGS, AND MEANS COUPLED TO THE COIL ASSEMBLY FOR INVERSELY VARYING THE MAGNETIC COUPLING BETWEEN THE PRIMARY WINDING
References Cited (Backward Citations)
US2931963A
Cited
US3104349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |