US3796954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Watthour meter assembly having an auxiliary lag plate mounted on a potential flux return bar
Assignee: General Electric Co
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Filing: 1972-08-24
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Granted: 1974-03-12
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Expires: 1992-08-24
Abstract
Abstract An induction type watthour meter is provided with a variable resistance lag loop mounted on its potential stator, and an auxiliary lag plate, having a fixed resistance, rigidly mounted around a potential flux return bar of the meter adjacent the periphery of the rotatable induction disc of the meter. The structure and mounting arrangement of the auxiliary lag plate is such that it affords sufficient over-lagging effect to enable a meter to be adjusted so it can accurately measure power that is supplied to loads at widely different frequencies.
Inventors
- 👤 Quarrie A Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:52
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
In a watthour meter sub-assembly having; a rigid frame (1) with a 3-poled potential stator (2) and a current stator (8) mounted in spaced-apart relationship thereon to define an air gap (10) between said stators, a potential coil (4) wound on said potential stator for generating a potential flux therein when energized, a current coil (9) wound on said current stator for generating a current flux therein when energized, a potential flux return bar (14) mounted on said potential stator to provide a low-reluctance path from the current stator side of said air gap to said potential stator, an induction disc (11) rotatably mounted within said air gap where it intersects said potential and current fluxes, an adjustable lag loop (12) mounted around the central pole of said potential stator, the improvement comprising an auxiliary lag plate (18) mounted in fixed position around said flux return bar at a point thereon adjacent the periphery of said disc.
Claim 2
Dependent Claim
157 words
In a watthour meter sub-assembly having; a rigid frame (1) with a 3-poled potential stator (2) and a current stator (8) mounted in spaced-apart relationship thereon to define an air gap (10) between said stators, a potential coil (4) wound on said potential stator for generating a potential flux therein when energized, a current coil (9) wound on said current stator for generating a current flux therein when energized, a potential flux return bar (14) mounted on said potential stator to provide a low-reluctance path from the current stator side of said air gap to said potential stator, an induction disc (11) rotatably mounted within said air gap where it intersects said potential and current fluxes, an adjustable lag loop (12) mounted around the central pole of said potential stator, the improvement comprising an auxiliary lag plate (18) mounted in fixed position around said flux return bar at a point thereon adjacent the periphery of said disc.
Claim 3
Dependent Claim
39 words
An invention as defined in claim 1 wherein said auxiliary lag plate is in the form of an elongated, generally U-shaped washer, the sides of said washer being substantially parallel, respectively, to opposite sides of said flux return bar.
Claim 4
Dependent Claim
28 words
An invention as defined in claim 2 wherein the ends of said washer are crimped to bind said sides of the washer tightly against said flux return bar.
Claim 5
Dependent Claim
29 words
An invention as defined in claim 3 including an adhesive disposed between the washer and said flux return bar to secure the washer in fixed position around said bar.
Claim 6
Dependent Claim
90 words
An invention as defined in claim 1 wherein said flux return bar includes; a generally flat tongue positioned between two poles of said current stator, a pair of tabs staked, respectively, to the outer poles of said potential stator, and an integral arcuate portion between said tongue and tabs, said auxiliary lag plate being mounted on said arcuate portion, in a position to encircle substantially all of the potential flux passed through the flux return bar, before said flux is divided between the two outer poles of the potential stator.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |