Patent US3113280A successfully refreshed from Google Patents.
US3113280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-magnetic means for measuring a mechanical excursion
Assignee: Individual
•
Filing: 1961-01-16
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Granted: 1963-12-03
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Expires: 1981-01-16
Abstract
No abstract record available.
Inventors
- 👤 Hobley Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:16
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/22; G01D5/225; G01D5/2258
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
199 words
A DEVICE FOR MEASURING A MECHANICAL EXCURSION, SAID DEVICE COMPRISING TWO RELATIVELY MOVABLE ASSEMBLIES TO WHICH SAID MECHANICAL EXCURSION IS COMMUNICATED, THE FIRST SUCH ASSEMBLY COMPRISING AN ANNULAR FERRO-MAGNETIC YOKE TERMINATING IN A PAIR OF RADIALLY INWARDLY EXTENDING END MEMBERS DEFINING AXIALLY-SPACED, ANNULAR POLE PIECES, AND MEANS TO SET UP A SINGLE MAGNETIC FIELD EXTENDING SPATIALLY UNINTERRUPTEDLY ALONG THE AXIAL PATH FROM ONE SAID POLE PIECE TO THE OTHER, SAID MEANS COMPRISING A PRIMARY COIL STRUCTURE MAGNETICALLY ASSOCIATED WITH SAID YOKE, SAID FIELD BEING OF SUBSTANTIALLY UNIFORM STRENGTH ALONG A LONGITUDINALLY CENTRAL PORTION OF SAID PATH WHICH IS APPROXIMATELY AS GREAT IN LENGTH AS THE MAXIMUM THROW OF SAID EXCURSION, THE SECOND SUCH ASSEMBLY COMPRISING A SECONDARY COIL STRUCTURE SUPPORTED COAXIALLY IN SAID PATH FOR MOVEMENT THEREALONG, SAID SECONDARY COIL STRUCTURE EXTENDING AXIALLY OUTWARDLY BEYOND BOTH SAID END MEMBERS BY AN AMOUNT GREATER THAN HALF THE MAXIMUM THROW OF SAID EXCURSION WHEREBY IN ALL POSITIONS OF SAID SECONDARY COIL STRUCTURE TO LOCATE EACH END THEREOF BEYOND THE FRINGE MAGNETIC FIELD EXTENDING OUTWARDLY FROM THE ADJACENT SAID END MEMBER, SAID SECONDARY COIL STRUCTURE BEING DIVIDED CENTRALLY OF ITS LONGITUDINAL EXTENT INTO TWO COIL PORTIONS CONNECTED IN OPPOSITION TO EACH OTHER.
Claim 2
Independent Claim
199 words
A DEVICE FOR MEASURING A MECHANICAL EXCURSION, SAID DEVICE COMPRISING TWO RELATIVELY MOVABLE ASSEMBLIES TO WHICH SAID MECHANICAL EXCURSION IS COMMUNICATED, THE FIRST SUCH ASSEMBLY COMPRISING AN ANNULAR FERRO-MAGNETIC YOKE TERMINATING IN A PAIR OF RADIALLY INWARDLY EXTENDING END MEMBERS DEFINING AXIALLY-SPACED, ANNULAR POLE PIECES, AND MEANS TO SET UP A SINGLE MAGNETIC FIELD EXTENDING SPATIALLY UNINTERRUPTEDLY ALONG THE AXIAL PATH FROM ONE SAID POLE PIECE TO THE OTHER, SAID MEANS COMPRISING A PRIMARY COIL STRUCTURE MAGNETICALLY ASSOCIATED WITH SAID YOKE, SAID FIELD BEING OF SUBSTANTIALLY UNIFORM STRENGTH ALONG A LONGITUDINALLY CENTRAL PORTION OF SAID PATH WHICH IS APPROXIMATELY AS GREAT IN LENGTH AS THE MAXIMUM THROW OF SAID EXCURSION, THE SECOND SUCH ASSEMBLY COMPRISING A SECONDARY COIL STRUCTURE SUPPORTED COAXIALLY IN SAID PATH FOR MOVEMENT THEREALONG, SAID SECONDARY COIL STRUCTURE EXTENDING AXIALLY OUTWARDLY BEYOND BOTH SAID END MEMBERS BY AN AMOUNT GREATER THAN HALF THE MAXIMUM THROW OF SAID EXCURSION WHEREBY IN ALL POSITIONS OF SAID SECONDARY COIL STRUCTURE TO LOCATE EACH END THEREOF BEYOND THE FRINGE MAGNETIC FIELD EXTENDING OUTWARDLY FROM THE ADJACENT SAID END MEMBER, SAID SECONDARY COIL STRUCTURE BEING DIVIDED CENTRALLY OF ITS LONGITUDINAL EXTENT INTO TWO COIL PORTIONS CONNECTED IN OPPOSITION TO EACH OTHER.
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) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |