Patent US4004221A successfully refreshed from Google Patents.
US4004221A
Expired / Lapsed
US
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Test device and method of checking circuitry
Assignee: General Electric Co
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Filing: 1974-12-19
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Granted: 1977-01-18
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Expires: 1994-12-19
Abstract
Abstract An electrical test device and method for use in checking current carrying circuitry by an AC current measuring hook-on meter having a magnetic core for magnetic coupling to the circuit being measured. The test device includes the electrical current carrying conductor means to be tested and support means upon which the conductor means is wound and through which the magnetic core of the hook-on meter may be placed. The test device and method is utilized for more easily and accurately performing a checkout of the circuitry and is particularly useful in connection with appliances.
Inventors
- 👤 Marvin T. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:05
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R15/00; G01R15/14; G01R15/18; G01R15/186
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
120 words
An electrical test device for use in checking current carrying circuitry with an AC current measuring hook-on meter having a magnetic core wherein the test device is permanently installed on an electrical machine having a plurality of electrical conductors supplying a plurality of different electrical loads, said test device comprising: a plurality of hollow support members each supporting a set of windings, each set having a specified number of turns of at least one of the electrical conductors, and means permanently attaching the hollow support members on the electrical machine, the plurality of support members being supported in such a manner as to allow the core structure of a hook-on meter to surround the turns to provide the current measurements.
Claim 2
Dependent Claim
120 words
An electrical test device for use in checking current carrying circuitry with an AC current measuring hook-on meter having a magnetic core wherein the test device is permanently installed on an electrical machine having a plurality of electrical conductors supplying a plurality of different electrical loads, said test device comprising: a plurality of hollow support members each supporting a set of windings, each set having a specified number of turns of at least one of the electrical conductors, and means permanently attaching the hollow support members on the electrical machine, the plurality of support members being supported in such a manner as to allow the core structure of a hook-on meter to surround the turns to provide the current measurements.
Claim 3
Dependent Claim
28 words
The electrical test device of claim 1 wherein the support members are hollow, open-ended cylindrically shaped support members dimensioned to receive the magnetic core of the meter therethrough.
Claim 4
Dependent Claim
19 words
The electrical test device of claim 1 wherein said hollow open-ended support members are mounted on a support plate.
Claim 5
Dependent Claim
19 words
The electrical test device of claim 1 wherein said hollow open-ended support members are made of electrically insulated material.
Claim 6
Independent Claim
116 words
A method of checking the current carrying circuitry of an electrical machine having a plurality of electrical conductors with an AC current measuring hook-on meter having a magnetic core comprising the steps of: a. forming a plurality of hollow support members, b. supporting a set of windings on each support member, each set having a specified number of turns of at least one of the electrical conductors, c. attaching permanently the hollow support members on the electrical machine, d. placing the magnetic core of the hook-on meter through each of said support members to surround the turns thereon, e. reading the current measurements shown on the meter, and f. removing the meter from said support members.
Claim 7
Independent Claim
116 words
A method of checking the current carrying circuitry of an electrical machine having a plurality of electrical conductors with an AC current measuring hook-on meter having a magnetic core comprising the steps of: a. forming a plurality of hollow support members, b. supporting a set of windings on each support member, each set having a specified number of turns of at least one of the electrical conductors, c. attaching permanently the hollow support members on the electrical machine, d. placing the magnetic core of the hook-on meter through each of said support members to surround the turns thereon, e. reading the current measurements shown on the meter, and f. removing the meter from said support members.
Claim 8
Dependent Claim
26 words
The method of claim 5 wherein the support members are hollow open-ended cylindrically shaped support members dimensioned to receive the magnetic core of the meter therethrough.
Claim 9
Dependent Claim
17 words
The method of claim 5 wherein said hollow open-ended support members are mounted on a support plate.
Claim 10
Dependent Claim
17 words
The method of claim 5 wherein said hollow open-ended support members are made of electrically insulated material.
References Cited (Backward Citations)
US1126286A
Cited
US2831164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |