US3622882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactance circuit tester
Assignee: General Electric Co
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Filing: 1969-06-11
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Granted: 1971-11-23
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Expires: 1989-06-11
Abstract
Abstract Low-impedance circuits such as the armature windings of DC motors are tested for faults by equipment which delivers to them electric power surges having wave fronts with a rapid rate of change of voltage and current with respect to time, thereby causing a ringing oscillation to occur within these circuits. This ringing oscillation is inspected and compared with the type of oscillation which should occur in a circuit of this type having no fault to determine whether a fault exists. The equipment has a test probe which is physically separable from the surge generator. A capacitor used to develop the oscillation in the electric circuit being tested is mounted directly on the probe itself and is isolated from the surge generator by means of a fast recovery rectifier circuit. The surge generator may be provided with a capacity to deliver high current pulses through low-impedance coaxial couplers to the probe to burn out contaminants which tend to short out windings of the armatures.
Inventors
- 👤 Miles D Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:44
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/34; G01R31/346; H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/55; H03K3/57
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
243 words
Equipment for testing the inductive reactance of an electric component by applying a surge of electric energy to the component to shock excite the component and produce an oscillatory voltage wave which is monitored to determine the quality of the component comprising, in combination: a. means for generating surges of electric power, each of said surges having a wave front with a rapid rate of change of voltage and current with respect to time, said means for generating surges having the capacity to deliver high-power surges which are capable of burning out contaminants causing short circuits to occur in the electric component; b. first and second contacts connectable to the electrical component to which the surges are to be applied, and lowimpedance means for connecting said contacts to the output of said means for generating surges; c. a capacitor and means for connecting said capacitor across said first and second contacts so that said capacitor oscillates with the electric component being tested when a surge of electric energy is applied to the electric component; d. and a fast recovery rectifier circuit connected between the point where said capacitor is connected to one of said contacts and said means for generating surges of electric power, said fast recovery rectifier circuit coupling the surges of electric energy to the electric component being tested and isolating said capacitor and the component from said means for generating surges after a surge has been coupled to the component.
Claim 2
Dependent Claim
243 words
Equipment for testing the inductive reactance of an electric component by applying a surge of electric energy to the component to shock excite the component and produce an oscillatory voltage wave which is monitored to determine the quality of the component comprising, in combination: a. means for generating surges of electric power, each of said surges having a wave front with a rapid rate of change of voltage and current with respect to time, said means for generating surges having the capacity to deliver high-power surges which are capable of burning out contaminants causing short circuits to occur in the electric component; b. first and second contacts connectable to the electrical component to which the surges are to be applied, and lowimpedance means for connecting said contacts to the output of said means for generating surges; c. a capacitor and means for connecting said capacitor across said first and second contacts so that said capacitor oscillates with the electric component being tested when a surge of electric energy is applied to the electric component; d. and a fast recovery rectifier circuit connected between the point where said capacitor is connected to one of said contacts and said means for generating surges of electric power, said fast recovery rectifier circuit coupling the surges of electric energy to the electric component being tested and isolating said capacitor and the component from said means for generating surges after a surge has been coupled to the component.
Claim 3
Dependent Claim
273 words
Equipment for testing the inductive reactance of an electric component by applying a surge of electric energy to the component to shock excite the component and produce an oscillatory voltage wave which is monitored to determine the quality of the component comprising, in combination: a. means for generating surges of electric power, each of the surges having a wave front with a rapid rate of change of voltage and current with respect to time, said means for generating surges of electric power including means for synchronizing the generation of the surges with the AC voltage coupled from an AC source to said equipment; b. low-impedance coupling means having a first electric path and a second electric path and means for connecting one end of each of said paths of said low-impedance coupling means to a separate point on said means for generating surges of electric power; c. and surge delivery means physically separable from said means for generating surges; said surge delivery means including first and second contacts connectable to the electric component to be tested; a capacitor; means for mounting said capacitor on said surge delivery means and means for connecting said capacitor to said first and second contacts; means for connecting the other end of said first path to said first contact and means for connecting the other end of said second path to said second contact; said equipment further including a fast recovery rectifier circuit connected between said means for generating surges and said contacts for isolating said capacitor and the component to be tested from said means for generating surges after a surge has been coupled to the component.
Claim 4
Dependent Claim
273 words
Equipment for testing the inductive reactance of an electric component by applying a surge of electric energy to the component to shock excite the component and produce an oscillatory voltage wave which is monitored to determine the quality of the component comprising, in combination: a. means for generating surges of electric power, each of the surges having a wave front with a rapid rate of change of voltage and current with respect to time, said means for generating surges of electric power including means for synchronizing the generation of the surges with the AC voltage coupled from an AC source to said equipment; b. low-impedance coupling means having a first electric path and a second electric path and means for connecting one end of each of said paths of said low-impedance coupling means to a separate point on said means for generating surges of electric power; c. and surge delivery means physically separable from said means for generating surges; said surge delivery means including first and second contacts connectable to the electric component to be tested; a capacitor; means for mounting said capacitor on said surge delivery means and means for connecting said capacitor to said first and second contacts; means for connecting the other end of said first path to said first contact and means for connecting the other end of said second path to said second contact; said equipment further including a fast recovery rectifier circuit connected between said means for generating surges and said contacts for isolating said capacitor and the component to be tested from said means for generating surges after a surge has been coupled to the component.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |