US4082999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Programmable variable-rate electric adapting device for watt-hour meters
Assignee: Individual
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Filing: 1976-06-30
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Granted: 1978-04-04
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Expires: 1996-06-30
Abstract
Abstract A variable-rate electric adapting device for use with a watt-hour meter of the single- or polyphase induction-type, the adapting device being arranged to generate a controlled variable-rate input to the magnetic circuit of the meter to vary the drive of the meter motor in accordance with programmed rate versus time profiles stored in a programming element of the device, the latter being either pre-programmed or continuously programmed by data link. The programming element is arranged to address the adapting device only at discrete intervals of time coinciding with control signals from a timing device. The profile constants may be changed by data links, temperature transducers, voltage amplitude detectors and load detectors. Additional outputs are derived from the programming element to allow individual loads to be connected and disconnected.
Inventors
- 👤 Anthony Gail Staker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:53
CPC Classifications
G; G01; G01R; G01R21/00; G01R21/007; G01R11/00; G01R11/56; G01R11/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
226 words
A programmable variable-rate electric adapting device for watt-hour meters comprising: first terminals for connecting to the contact jaws of a watt-hour meter socket receptacle; second terminals for connecting to the blades of a watt-hour meter; and a variable rate circuit coupled to said first and second terminals so as to be in parallel with the line voltage measuring coil of the watt-hour meter, said variable rate circuit comprising: a digital clock for generating signals establishing the time; a programmer coupled to said digital clock to receive said signals establishing the time, to select a predetermined scaling rate stored in said programmer based upon the time, and to provide an output signal that is indicative of said selected predetermined scaling rate; a variable generator coupled to said programmer to receive said selected predetermined scaling rate output signal and to generate switch drive signals corresponding to said selected predetermined scaling rate; and a solid state actuating switch coupled to said variable generator and coupled to the line voltage measuring coil of the watt-hour meter when said variable-rate circuit is coupled to said second terminal, said actuating switch responding to said switch drive signals to either allow current from the line to flow through the line voltage measuring coil during an on cycle or to prevent current from flowing through said line voltage measuring coil during an off cycle.
Claim 2
Dependent Claim
226 words
A programmable variable-rate electric adapting device for watt-hour meters comprising: first terminals for connecting to the contact jaws of a watt-hour meter socket receptacle; second terminals for connecting to the blades of a watt-hour meter; and a variable rate circuit coupled to said first and second terminals so as to be in parallel with the line voltage measuring coil of the watt-hour meter, said variable rate circuit comprising: a digital clock for generating signals establishing the time; a programmer coupled to said digital clock to receive said signals establishing the time, to select a predetermined scaling rate stored in said programmer based upon the time, and to provide an output signal that is indicative of said selected predetermined scaling rate; a variable generator coupled to said programmer to receive said selected predetermined scaling rate output signal and to generate switch drive signals corresponding to said selected predetermined scaling rate; and a solid state actuating switch coupled to said variable generator and coupled to the line voltage measuring coil of the watt-hour meter when said variable-rate circuit is coupled to said second terminal, said actuating switch responding to said switch drive signals to either allow current from the line to flow through the line voltage measuring coil during an on cycle or to prevent current from flowing through said line voltage measuring coil during an off cycle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |