US4724601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a return-to-zero gauge
Assignee: Motors Liquidation Co
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Filing: 1986-02-10
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Granted: 1988-02-16
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Expires: 2006-02-10
Abstract
Abstract An air core electrical gauge incorporates on the bobbin an annular biasing magnet magnetized in a direction to return the meter pointer to zero in the absence of a gauge driving current. A method of manufacturing the gauge includes magnetizing the biasing magnet after it is secured to a bobbin portion but optionally magnetizing the guage armature at the same time.
Inventors
- 👤 Daniel C. MacManus
- 👤 David A. Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:04
CPC Classifications
G; G01; G01R; G01R5/00; G01R5/14; G01R5/16; H; H01; H01F; H01F7/00; H01F7/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49073
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
The method of manufacturing a return-to-zero gauge assembly having a pair of bobbin portions, an armature journal in each portion, an annular biasing magnet, a magnetized armature, and coils comprising the steps of; assembling an annular blank for the biasing magnet to one of the bobbin portions concentrically with a journal, and establishing a magnetizing field across the blank and its associated bobbin portion to magnetize the blank in a predetermined direction parallel to a diameter of the blank to form the biasing magnet.
Claim 2
Independent Claim
84 words
The method of manufacturing a return-to-zero gauge assembly having a pair of bobbin portions, an armature journal in each portion, an annular biasing magnet, a magnetized armature, and coils comprising the steps of; assembling an annular blank for the biasing magnet to one of the bobbin portions concentrically with a journal, and establishing a magnetizing field across the blank and its associated bobbin portion to magnetize the blank in a predetermined direction parallel to a diameter of the blank to form the biasing magnet.
Claim 3
Independent Claim
106 words
The method of manufacturing a return-to-zero gauge assembly having a pair of bobbin portions, an armature journal in each portion, an annular biasing magnet, a magnetized armature, and coils comprising the steps of; assembling an annular blank for the biasing magnet to one of the bobbin portions concentrically with a journal, establishing a magnetizing field across the blank and its associated bobbin portion to magnetize the blank in a predetermined direction parallel to a diameter of the blank to form the biasing magnet, then, after the biasing magnet is formed, assembling the armature to the bobbin portions, and winding the coils around the assembled bobbin portions.
Claim 4
Independent Claim
106 words
The method of manufacturing a return-to-zero gauge assembly having a pair of bobbin portions, an armature journal in each portion, an annular biasing magnet, a magnetized armature, and coils comprising the steps of; assembling an annular blank for the biasing magnet to one of the bobbin portions concentrically with a journal, establishing a magnetizing field across the blank and its associated bobbin portion to magnetize the blank in a predetermined direction parallel to a diameter of the blank to form the biasing magnet, then, after the biasing magnet is formed, assembling the armature to the bobbin portions, and winding the coils around the assembled bobbin portions.
Claim 5
Independent Claim
101 words
The method of manufacturing a return-to-zero gauge assembly having a pair of bobbin portions, an armature journal in each portion, an annular biasing magnet concentric with an armature journal, a magnetized armature, and coils comprising the steps of; assembling an annular blank for the biasing magnet and an unmagnetized armature to the bobbin portions, winding the coils around the assembled bobbin portions, and establishing a magnetizing field across the assembly to simultaneously magnetize the blank and the armature in a predetermined direction parallel to a diameter of the blank and of the armature to form the biasing magnet and the armature.
Claim 6
Independent Claim
101 words
The method of manufacturing a return-to-zero gauge assembly having a pair of bobbin portions, an armature journal in each portion, an annular biasing magnet concentric with an armature journal, a magnetized armature, and coils comprising the steps of; assembling an annular blank for the biasing magnet and an unmagnetized armature to the bobbin portions, winding the coils around the assembled bobbin portions, and establishing a magnetizing field across the assembly to simultaneously magnetize the blank and the armature in a predetermined direction parallel to a diameter of the blank and of the armature to form the biasing magnet and the armature.
References Cited (Backward Citations)
US2668945A
Cited
US2697204A
Cited
US3275936A
Cited
US3753107A
Cited
US3777265A
Cited
US4492920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |