US3609609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed electromagnet
Assignee: General Electric Information Systems SpA
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Filing: 1969-03-05
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Granted: 1971-09-28
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Expires: 1989-03-05
Abstract
Abstract An electromagnetic structure including a movable armature and having additional airgaps provided in the magnetic loop so that the transit time from rest position to energized position is decreased.
Inventors
- 👤 Piero Bertazzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:09
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1638; B; B41; B41J; B41J9/00; B41J9/26; B41J9/38; H01F7/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
An electromagnet comprising a fixed ferromagnetic core, a coil wound on this core and effective in generating a magnetic flux in a closed circuit comprising said core; a ferromagnetic yoke for closing said magnetic circuit externally to said core along a low reluctance path and spaced from said core by at least a first planar airgap, said yoke being comprised of at least a portion fixed with respect to said core and movable portion separated from said fixed portion, a plane surface of said movable portion being opposite and substantially parallel to a plane surface of said fixed portion to define a planar second airgap between said opposed surfaces the plane of said second airgap being substantially perpendicular to the plane of said first gap, and mechanical linkages constraining the movement of said movable portion in a direction substantially perpendicular to the plane of said first gap.
Claim 2
Dependent Claim
147 words
An electromagnet comprising a fixed ferromagnetic core, a coil wound on this core and effective in generating a magnetic flux in a closed circuit comprising said core; a ferromagnetic yoke for closing said magnetic circuit externally to said core along a low reluctance path and spaced from said core by at least a first planar airgap, said yoke being comprised of at least a portion fixed with respect to said core and movable portion separated from said fixed portion, a plane surface of said movable portion being opposite and substantially parallel to a plane surface of said fixed portion to define a planar second airgap between said opposed surfaces the plane of said second airgap being substantially perpendicular to the plane of said first gap, and mechanical linkages constraining the movement of said movable portion in a direction substantially perpendicular to the plane of said first gap.
Claim 3
Dependent Claim
34 words
The electromagnet of claim 1 wherein the movable portion of said yoke comprises a plurality of movable portions and a rigid member to which said movable portions are fastened to form a solid assembly.
Claim 4
Dependent Claim
167 words
An electromagnet comprising normally spaced apart fixed and movable ferromagnetic portions juxtaposed to provide a closed magnetic circuit path, said fixed portion being provided with a coil for receiving electric current to generate magnetic flux in said closed circuit for attracting said movable portion to said fixed portion, a first plane surface of said movable portion being opposite and substantially parallel to a first plane surface of said fixed portion to define a planar first airgap between said opposed first surfaces and perpendicular to said magnetic flux path, a second plane surface of said movable portion being opposite and substantially parallel to a second plane surface of said fixed portion to define a planar second airgap between said opposed second surfaces and perpendicular to said magnetic flux path, and means for supporting said movable portion for movement in a direction substantially perpendicular to the plane of said first airgap, the plane of said second airgap being substantially parallel to the allowable direction movement of said movable portion.
Claim 5
Dependent Claim
167 words
An electromagnet comprising normally spaced apart fixed and movable ferromagnetic portions juxtaposed to provide a closed magnetic circuit path, said fixed portion being provided with a coil for receiving electric current to generate magnetic flux in said closed circuit for attracting said movable portion to said fixed portion, a first plane surface of said movable portion being opposite and substantially parallel to a first plane surface of said fixed portion to define a planar first airgap between said opposed first surfaces and perpendicular to said magnetic flux path, a second plane surface of said movable portion being opposite and substantially parallel to a second plane surface of said fixed portion to define a planar second airgap between said opposed second surfaces and perpendicular to said magnetic flux path, and means for supporting said movable portion for movement in a direction substantially perpendicular to the plane of said first airgap, the plane of said second airgap being substantially parallel to the allowable direction movement of said movable portion.
Claim 6
Dependent Claim
162 words
An electromagnet comprising normally spaced apart fixed and movable ferromagnetic portions juxtaposed to provide a closed magnetic circuit path, said fixed portion being provided with a coil for receiving electric current to generate magnetic flux in said closed circuit for attracting said movable portion to said fixed portion, a first plane surface of said movable portion being opposite and substantially parallel to a first plane surface of said fixed portion to define a planar first airgap between said opposed first surfaces and perpendicular to said magnetic flux path, a second plane surface of said movable portion being opposite and substantially parallel to a second plane surface of said fixed portion to define a planar second airgap between said opposed second surfaces and perpendicular to said magnetic flux path the planes of said first and second airgaps being mutually perpendicular to each other, and means for supporting said movable portion for movement in a direction perpendicular to the plane of said first airgap.
Claim 7
Dependent Claim
162 words
An electromagnet comprising normally spaced apart fixed and movable ferromagnetic portions juxtaposed to provide a closed magnetic circuit path, said fixed portion being provided with a coil for receiving electric current to generate magnetic flux in said closed circuit for attracting said movable portion to said fixed portion, a first plane surface of said movable portion being opposite and substantially parallel to a first plane surface of said fixed portion to define a planar first airgap between said opposed first surfaces and perpendicular to said magnetic flux path, a second plane surface of said movable portion being opposite and substantially parallel to a second plane surface of said fixed portion to define a planar second airgap between said opposed second surfaces and perpendicular to said magnetic flux path the planes of said first and second airgaps being mutually perpendicular to each other, and means for supporting said movable portion for movement in a direction perpendicular to the plane of said first airgap.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |