US4659985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric meter having at least two display registers selected according to a parameter
Assignee: General Electric Co
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Filing: 1984-11-27
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Granted: 1987-04-21
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Expires: 2004-11-27
Abstract
Abstract An electric watthour meter provides for selectively accumulating energy consumption in one of at least two registers according to the value of a parameter relative to a predetermined threshold level. The parameter may be a load current, a line voltage, a time of day or a combination thereof.
Inventors
- 👤 Julio J. Bianchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:35
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/56; G01R11/63
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
An electric meter comprising: a sensor disk; means for driving said sensor disk at a speed proportional to a current consumed by a load; a main register; an auxiliary register; means for sensing a voltage applied to said load; means for driveably connecting said sensor disk to said main register under a first condition of said voltage and current and for driveably connecting said sensor disk to said auxiliary register under a second different condition of said voltage and current whereby separate accumulation of energy usage is provided; said first condition including either one of said voltage and said current being less than first and second predetermined thresholds, respectively; and said second condition including both of said voltage and said current simultaneously exceeding said first and second predetermined thresholds, respectively.
Claim 2
Dependent Claim
130 words
An electric meter comprising: a sensor disk; means for driving said sensor disk at a speed proportional to a current consumed by a load; a main register; an auxiliary register; means for sensing a voltage applied to said load; means for driveably connecting said sensor disk to said main register under a first condition of said voltage and current and for driveably connecting said sensor disk to said auxiliary register under a second different condition of said voltage and current whereby separate accumulation of energy usage is provided; said first condition including either one of said voltage and said current being less than first and second predetermined thresholds, respectively; and said second condition including both of said voltage and said current simultaneously exceeding said first and second predetermined thresholds, respectively.
Claim 3
Dependent Claim
186 words
An electric meter comprising: a sensor disk; means for driving said sensor disk at a speed proportional to a current consumed by a load; a main register; an auxiliary register; means for sensing a voltage applied to said load; means for sensing a current consumed by said load; means for driveably connecting said sensor disk to said main register under a first condition of said voltage and current and for driveably connecting said sensor disk to said auxiliary register under a second different condition of said voltage and current whereby separate accumulation of energy usage is provided; said means for sensing a current including a compensating coil effective for producing a current signal proportional to said current consumed by said load; a resistor connected across said compensating coil and effective for producing a voltage proportional to said current signal; said compensating coil and said resistor having a characteristic effective for at least partly compensating for an impedance of said load; and said current signal being employed by said means for driveably connecting to sense at least one of said first and second conditions of said current.
Claim 4
Dependent Claim
186 words
An electric meter comprising: a sensor disk; means for driving said sensor disk at a speed proportional to a current consumed by a load; a main register; an auxiliary register; means for sensing a voltage applied to said load; means for sensing a current consumed by said load; means for driveably connecting said sensor disk to said main register under a first condition of said voltage and current and for driveably connecting said sensor disk to said auxiliary register under a second different condition of said voltage and current whereby separate accumulation of energy usage is provided; said means for sensing a current including a compensating coil effective for producing a current signal proportional to said current consumed by said load; a resistor connected across said compensating coil and effective for producing a voltage proportional to said current signal; said compensating coil and said resistor having a characteristic effective for at least partly compensating for an impedance of said load; and said current signal being employed by said means for driveably connecting to sense at least one of said first and second conditions of said current.
Claim 5
Dependent Claim
50 words
An electric meter according to claim 2 wherein: said first condition includes either one of said voltage and said current being less than first and second predetermined thresholds, respectively; and said second condition includes both of said voltage and said current simultaneously exceeding said first and second predetermined thresholds, respectively.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |