Patent US4649359A successfully refreshed from Google Patents.
US4649359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosion-proof electro-displacement converter device
Assignee: Azbil Corp
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Filing: 1985-07-10
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Granted: 1987-03-10
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Expires: 2005-07-10
Abstract
Abstract An explosion-proof type electro-displacement converter device comprising a cylindrical first yoke attached through a permanent magnet which is at the center of the bottom of a bowl-shaped second yoke, an exciter coil winding supported elastically by springs and arranged in the magnetic path formed between the yokes, the opening of the bowl-shaped yoke is sealed by a sealing means, and an output stem linked with the exciter coil winding and projecting, leaving an explosion-proof gap, through an opening which penetrates through the bowl-shaped yoke or the sealing means.
Inventors
- 👤 Yoshikuni Doki
- 👤 Masatoshi Fujiwara
- 👤 Tatsuhide Shiga
- 👤 Yohsuke Shono
- 👤 Mikio Tanaka
- 👤 Yoshihiro Tsuruoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:52
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
97 words
An explosion-proof type electro-displacement converter device comprising; a bowl-shaped first yoke, a permanent magnet located at the center of said first yoke, a cylindrical second yoke attached to said first yoke through said permanent magnet, an exciter coil winding arranged in a magnetic path between said yokes, spring means elastically supporting said winding, sealing means for sealing an end of said first yoke, an opening through said sealing means and an output stem linked with said exciter coil winding and projecting through said opening which penetrates through said said sealing means while leaving an explosion-proof gap therebetween.
Claim 2
Dependent Claim
97 words
An explosion-proof type electro-displacement converter device comprising; a bowl-shaped first yoke, a permanent magnet located at the center of said first yoke, a cylindrical second yoke attached to said first yoke through said permanent magnet, an exciter coil winding arranged in a magnetic path between said yokes, spring means elastically supporting said winding, sealing means for sealing an end of said first yoke, an opening through said sealing means and an output stem linked with said exciter coil winding and projecting through said opening which penetrates through said said sealing means while leaving an explosion-proof gap therebetween.
Claim 3
Dependent Claim
20 words
A device as set forth in claim 1 wherein said sealing means is a lid threaded onto said first yoke.
Claim 4
Dependent Claim
18 words
A device as set forth in claim 2 wherein said lid includes integral mount means for said device.
Claim 5
Dependent Claim
21 words
A device as set forth in claim 1 wherein said spring means serve as electrical conductors to said exciter coil winding.
Claim 6
Dependent Claim
18 words
A device as set forth in claim 1 wherein said magnet is a disc having oppositely magnetized faces.
Claim 7
Dependent Claim
15 words
A device as set forth in claim 1 wherein said spring means includes coil springs.
Claim 8
Dependent Claim
15 words
A device as set forth in claim 1 wherein said spring means includes flat springs.
Claim 9
Dependent Claim
80 words
An explosion-proof type electro-displacement converter device comprising: a bowl-shaped first yoke, a permanent magnet located at the center of said first yoke, a cylindrical second yoke attached to said first yoke through said permanent magnet, an exciter coil winding arranged in a magnetic path between said yokes, spring means elastically supporting said winding, an opening through said first yoke, and an output stem linked with said exciter coil winding and projecting through said opening while leaving an explosion-proof gap therebetween.
Claim 10
Dependent Claim
80 words
An explosion-proof type electro-displacement converter device comprising: a bowl-shaped first yoke, a permanent magnet located at the center of said first yoke, a cylindrical second yoke attached to said first yoke through said permanent magnet, an exciter coil winding arranged in a magnetic path between said yokes, spring means elastically supporting said winding, an opening through said first yoke, and an output stem linked with said exciter coil winding and projecting through said opening while leaving an explosion-proof gap therebetween.
Claim 11
Dependent Claim
21 words
A device as set forth in claim 8 wherein said spring means serve as electrical conductors to said exciter coil winding.
Claim 12
Dependent Claim
19 words
A device as set forth in claim 9 wherein said first yoke includes integral mount means for said device.
Claim 13
Dependent Claim
20 words
A device as set forth in claim 8 wherein said first yoke means includes integral mount means for said device.
Claim 14
Dependent Claim
15 words
A device as set forth in claim 8 wherein said stem projects through said magnet.
References Cited (Backward Citations)
US2556816A
Cited
US2655566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |