US3225228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear magnetic drive system
Assignee: Individual
•
Filing: 1963-10-10
•
Granted: 1965-12-21
•
Expires: 1983-10-10
Abstract
No abstract record available.
Inventors
- 👤 John L Roshala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:30
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/02; B60V3/04; B60L; B60L13/00; B60L13/10; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A LINEAR MAGNETIC DRIVE SYSTEM FOR MOVING A MEMBER RELATIVE TO A STATIONARY STRUCTURE, COMPRISING, IN COMBINATION: A PLURALITY OF STATIONARY MAGNETICALLY RESPONSIVE BARS EVENLY SPACED ALONG A GIVEN DIRECTION AND SUPPORTED BY SAID STATIONARY STRUCTURE; A PLURALITY OF ELECTROMAGNETS EVENLY SPACED ALONG IN A DIRECTION PARALLEL AND ADJACENT TO SAID GIVEN DIRECTION AND SUPPORTED BY SAID MEMBER, THE SPACING BETWEEN SAID BARS BEING DIFFERENT FROM THE SPACING BETWEEN SAID ELECTRO-MAGNETS; AND SWITCH MEANS RESPONSIVE TO THE JUXTAPOSITION OF ANY ONE MAGNET TO ANY ONE BAR TO DE-ENERGIZE SAID ONE MAGNET AND SUBSTANTIALLY SIMULTANEOUSLY ENERGIZE THE NEXT SUCCESSIVE MAGNET WHEREBY SAID NEXT SUCCESSIVE MAGNET WILL BE ATTRACTED TO THE NEXT SUCCESSIVE BAR FOLLOWING SAID ONE BAR, SAID SWITCH MEANS INCLUDING FIRST COOPERATING MEANS ON SAID STATIONARY STRCUTURE AND SECOND COOPERATING MEANS ON SAID MEMBER; SIGNAL GENERATING MEANS CONNECTED TO SAID SECOND COOPERATING MEANS AND RESPONSIVE TO JUXTAPOSITION OF SAID FIRST AND SECOND COOPERATING MEANS TO PROVIDE TRIGGERING SIGNALS; A POWER SUPPLY; A PLURALITY OF SWITCHES CONNECTED BETWEEN SAID POWER SUPPLY AND SAID MAGNETS; AND MEANS PASSING SAID TRIGGERING SIGNALS TO SAID SWITCHES TO EFFECT SAID DE-ENERGIZATION OF ONE MAGNET AND ENERGIZATION OF SAID NEXT SUCCESSIVE MAGNET TO MOVE SAID MEMBER RELATIVE TO SAID STATIONARY STRUCTURE.
Claim 2
Dependent Claim
205 words
A LINEAR MAGNETIC DRIVE SYSTEM FOR MOVING A MEMBER RELATIVE TO A STATIONARY STRUCTURE, COMPRISING, IN COMBINATION: A PLURALITY OF STATIONARY MAGNETICALLY RESPONSIVE BARS EVENLY SPACED ALONG A GIVEN DIRECTION AND SUPPORTED BY SAID STATIONARY STRUCTURE; A PLURALITY OF ELECTROMAGNETS EVENLY SPACED ALONG IN A DIRECTION PARALLEL AND ADJACENT TO SAID GIVEN DIRECTION AND SUPPORTED BY SAID MEMBER, THE SPACING BETWEEN SAID BARS BEING DIFFERENT FROM THE SPACING BETWEEN SAID ELECTRO-MAGNETS; AND SWITCH MEANS RESPONSIVE TO THE JUXTAPOSITION OF ANY ONE MAGNET TO ANY ONE BAR TO DE-ENERGIZE SAID ONE MAGNET AND SUBSTANTIALLY SIMULTANEOUSLY ENERGIZE THE NEXT SUCCESSIVE MAGNET WHEREBY SAID NEXT SUCCESSIVE MAGNET WILL BE ATTRACTED TO THE NEXT SUCCESSIVE BAR FOLLOWING SAID ONE BAR, SAID SWITCH MEANS INCLUDING FIRST COOPERATING MEANS ON SAID STATIONARY STRCUTURE AND SECOND COOPERATING MEANS ON SAID MEMBER; SIGNAL GENERATING MEANS CONNECTED TO SAID SECOND COOPERATING MEANS AND RESPONSIVE TO JUXTAPOSITION OF SAID FIRST AND SECOND COOPERATING MEANS TO PROVIDE TRIGGERING SIGNALS; A POWER SUPPLY; A PLURALITY OF SWITCHES CONNECTED BETWEEN SAID POWER SUPPLY AND SAID MAGNETS; AND MEANS PASSING SAID TRIGGERING SIGNALS TO SAID SWITCHES TO EFFECT SAID DE-ENERGIZATION OF ONE MAGNET AND ENERGIZATION OF SAID NEXT SUCCESSIVE MAGNET TO MOVE SAID MEMBER RELATIVE TO SAID STATIONARY STRUCTURE.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |