US3218534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic linear positioning apparatus
Assignee: —
•
Filing: —
•
Granted: 1965-11-16
•
Expires: 1982-11-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:25
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A POSITIONING APPARATUS COMPRISING A PAIR OF AXIALLY DISPOSED SHAFTS SUPPORTED FOR RELATIVE MOVEMENT AND MOVEMENT RELATIVE TO A FIXED REFERENCE, A PAIR OF ELECTROMAGNETS CARRIED BY SAID SHAFTS WITH EACH ELECTROMAGNET BEING RIGIDLY ATTACHED TO A RESPECTIVE SHAFT, SAID ELECTROMAGNETS BEING RELATIVELY DISPOSED TO FORM COOPERATIVE ELECTROMAGNETIC FIELDS WHEN ENERGIZED, ELECTRICALLY-ACTUATED BRAKING MEANS ADAPTED TO RELEASABLY ENGAGE EACH OF SAID SHAFTS AND PREVENT MOVEMENT THEREOF RELATIVE TO SAID FIXED REFERENCE, AND CONTROL MEANS ELECTRICALLY CONNECTED TO SAID ELECTROMAGNETS AND TO SAID BRAKING MEANS FOR SELECTIVELY ENERGIZING SAID ELECTROMAGNETS TO CREATE ALTERNATELY ATTRACTING AND REPELLING MAGNET FIELDS THEREBETWEEN AND TO SELECTIVELY ACTUATE SAID BRAKING MEANS IN COOPERATION WITH THE ENERGIZATION OF SAID ELECTROMAGNETS TO MOVE SAID SHAFTS RELATIVE TO SAID FIXED REFERENCE.
Claim 2
Dependent Claim
122 words
A POSITIONING APPARATUS COMPRISING A PAIR OF AXIALLY DISPOSED SHAFTS SUPPORTED FOR RELATIVE MOVEMENT AND MOVEMENT RELATIVE TO A FIXED REFERENCE, A PAIR OF ELECTROMAGNETS CARRIED BY SAID SHAFTS WITH EACH ELECTROMAGNET BEING RIGIDLY ATTACHED TO A RESPECTIVE SHAFT, SAID ELECTROMAGNETS BEING RELATIVELY DISPOSED TO FORM COOPERATIVE ELECTROMAGNETIC FIELDS WHEN ENERGIZED, ELECTRICALLY-ACTUATED BRAKING MEANS ADAPTED TO RELEASABLY ENGAGE EACH OF SAID SHAFTS AND PREVENT MOVEMENT THEREOF RELATIVE TO SAID FIXED REFERENCE, AND CONTROL MEANS ELECTRICALLY CONNECTED TO SAID ELECTROMAGNETS AND TO SAID BRAKING MEANS FOR SELECTIVELY ENERGIZING SAID ELECTROMAGNETS TO CREATE ALTERNATELY ATTRACTING AND REPELLING MAGNET FIELDS THEREBETWEEN AND TO SELECTIVELY ACTUATE SAID BRAKING MEANS IN COOPERATION WITH THE ENERGIZATION OF SAID ELECTROMAGNETS TO MOVE SAID SHAFTS RELATIVE TO SAID FIXED REFERENCE.
References Cited (Backward Citations)
US2752546A
Cited
US3138749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |