US3753107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic gauge with two v-positioned coils and having magnetic restoring ring
Assignee: Ford Motor Co
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Filing: 1972-06-21
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Granted: 1973-08-14
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Expires: 1992-06-21
Abstract
Abstract Magnetic gauge in which two electrical coils are positioned to form a V between them such that their axes intersect at a point intermediate and exterior of the coils. A permanent magnet is rotatable on a shaft which carries a pointer. The permanent magnet extends partially into each of the V-positioned coils and the vector resultant of the magnetic fields produced by currents in the coils determines the position of the rotatable magnet and the pointer carried by the shaft. A fixed resistor may be connected in series with one of the coils and a variable resistance may be connected in series with the other coil. A change in the variable resistance alters the current magnitude in its serially connected electrical coil.
Inventors
- 👤 J Burgett
- 👤 G Gorrell
- 👤 N Mills
- 👤 L Vanderberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:54
CPC Classifications
G; G01; G01R; G01R5/00; G01R5/14; G01R5/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A magnetic gauge, which comprises: a support structure; a shaft journalled in said support structure; indicating means connected with said shaft; a permanent magnet attached to said shaft for rotation therewith; a pair of electrical coils helically wound on said support structure, said coils being positioned to form a V between them, the axis of said shaft being located between said coils within said V formed between said coils; and a ring made from a magnetic material, said ring having a gap in it, and said ring being positioned around said shaft or said magnetic gauge.
Claim 2
Dependent Claim
96 words
A magnetic gauge, which comprises: a support structure; a shaft journalled in said support structure; indicating means connected with said shaft; a permanent magnet attached to said shaft for rotation therewith; a pair of electrical coils helically wound on said support structure, said coils being positioned to form a V between them, the axis of said shaft being located between said coils within said V formed between said coils; and a ring made from a magnetic material, said ring having a gap in it, and said ring being positioned around said shaft or said magnetic gauge.
Claim 3
Dependent Claim
150 words
A magnetic gauge, which comprises: a support structure, said support structure including first and second mating parts, each of said mating parts having a bearing, said mating parts together defining a chamber; a shaft journalled for rotation in said bearings in said mating parts of said support structure, said shaft passing through said chamber formed by said mating parts of said support structure; a permanent magnet located within said chamber and attached to said shaft for rotation therewith; a first electrical coil helically wound on said support structure; a second electrical coil helically wound on said support structure, the axis of said first coil intersecting the axis of said second coil at a point exterior of and intermediate said first and second coils; and a ring made from a magnetic material, said ring having a gap in it, and said ring being positioned around said shaft of said magnetic gauge.
Claim 4
Dependent Claim
150 words
A magnetic gauge, which comprises: a support structure, said support structure including first and second mating parts, each of said mating parts having a bearing, said mating parts together defining a chamber; a shaft journalled for rotation in said bearings in said mating parts of said support structure, said shaft passing through said chamber formed by said mating parts of said support structure; a permanent magnet located within said chamber and attached to said shaft for rotation therewith; a first electrical coil helically wound on said support structure; a second electrical coil helically wound on said support structure, the axis of said first coil intersecting the axis of said second coil at a point exterior of and intermediate said first and second coils; and a ring made from a magnetic material, said ring having a gap in it, and said ring being positioned around said shaft of said magnetic gauge.
References Cited (Backward Citations)
US3094659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |