US3624630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current detection system
Assignee: Singer General Precision Inc
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Filing: 1969-12-04
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Granted: 1971-11-30
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Expires: 1989-12-04
Abstract
Abstract Apparatus for detecting the presence of current in at least one conductor connected in an electrical circuit, wherein a pulsating magnetic field is applied in the vicinity of a permeable member in flux exchange relation with the conductor to effect a change in flux density through the permeable member. A circuit is provided which produces an output signal in response to predetermined changes in the flux density.
Inventors
- 👤 George F Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:19
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R19/15; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/085
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
Apparatus for detecting the presence of current in a first conductor connected in an electrical circuit, said apparatus comprising at least one permeable member in flux exchange relation with said conductor, means to apply a magnetic field in the vicinity of said permeable member to effect a change in flux density through said permeable member, means responsive to predetermined changes in said flux density to produce a first output signal, strobe means adapted to produce a positive signal, upon command from said means to apply a magnetic field and electrical gate means having a first input connected to said strobe means and having a second input connected to said means to produce said first output signal, said gate means adapted to produce a second output signal when said first output signal exceeds a predetermined level simultaneously with the occurrence of the positive signal at the output of the strobe means.
Claim 2
Dependent Claim
150 words
Apparatus for detecting the presence of current in a first conductor connected in an electrical circuit, said apparatus comprising at least one permeable member in flux exchange relation with said conductor, means to apply a magnetic field in the vicinity of said permeable member to effect a change in flux density through said permeable member, means responsive to predetermined changes in said flux density to produce a first output signal, strobe means adapted to produce a positive signal, upon command from said means to apply a magnetic field and electrical gate means having a first input connected to said strobe means and having a second input connected to said means to produce said first output signal, said gate means adapted to produce a second output signal when said first output signal exceeds a predetermined level simultaneously with the occurrence of the positive signal at the output of the strobe means.
Claim 3
Dependent Claim
39 words
The apparatus of claim 1 wherein said means to apply a magnetic field comprises an amplifier and a second conductor connected to said amplifier, and wherein said amplifier is adapted for connection to a pulsating source of electrical energy.
Claim 4
Dependent Claim
72 words
The apparatus of claim 2 wherein said means to produce an output signal comprises a third conductor in flux exchange relationship with said permeable member, whereby said change in flux density induces a voltage in said third conductor, and wherein said means to produce said first output signal further comprises an amplifier, said amplifier connected in circuit to said third conductor for amplifying said induced voltage to produce said first output voltage.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |