US4101826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fault indicator including a reed relay responsive to above normal current flow in a conductor
Assignee: Individual
•
Filing: 1977-06-13
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Granted: 1978-07-18
•
Expires: 1997-06-13
Abstract
Abstract A fault indicator includes a reed relay disposed for responding to a magnetic field surrounding a conductor particularly when conducting above-normal current. The relay triggers a latch which enables a counter and starts a pulse generator which, in turn, drives a flasher, and the pulses are counted for resetting the device by resetting the latch after a number of pulses have been counted. The reed relay is disposed in a position for adjustment of alignment and misalignment in relation to the conductor.
Inventors
- 👤 Hendrik Horsitmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:08
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16504; G01R19/16509
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
Fault circuit indicator, comprising: a reed contact relay to be placed into the magnetic field surrounding a conductor to be supervised as to any excess electrical current; an electronic latch connected to be operated by the reed contact to assume a first state upon closing of the reed contact; a pulse generator connected to be operated by the latch when the latch is in the first state, the latch inhibiting the generator when the latch is in a second state; a visible signalling device connected to the pulse generator to emit blinking signals in response to pulses when generated by the generator; an electronic counter also connected to the generator to count blinking pulses, and further connected to the latch to reset the latch to the second state after counting a particular number of pulses; and a long life battery connected to operate the latch, the generator, the counter and the signalling device.
Claim 2
Dependent Claim
153 words
Fault circuit indicator, comprising: a reed contact relay to be placed into the magnetic field surrounding a conductor to be supervised as to any excess electrical current; an electronic latch connected to be operated by the reed contact to assume a first state upon closing of the reed contact; a pulse generator connected to be operated by the latch when the latch is in the first state, the latch inhibiting the generator when the latch is in a second state; a visible signalling device connected to the pulse generator to emit blinking signals in response to pulses when generated by the generator; an electronic counter also connected to the generator to count blinking pulses, and further connected to the latch to reset the latch to the second state after counting a particular number of pulses; and a long life battery connected to operate the latch, the generator, the counter and the signalling device.
Claim 3
Dependent Claim
25 words
Indicator as in claim 1, said signalling device including a transistor connected to the generator, further including a light emitting diode controlled by the transistor.
Claim 4
Dependent Claim
37 words
Indicator as in claim 1, and including a case containing the latch, the generator, the counter, the signalling device, and the battery, and having an opening at its front end through which said blinking pulses are visible.
Claim 5
Dependent Claim
27 words
Indicator as in claim 1, and in combination with mounting means connected to the conductor, to establish a definite distance between the conductor and the reed relay.
Claim 6
Dependent Claim
19 words
Indicator as in claim 1, including means for mounting the reed relay in particular distance relation to the conductor.
Claim 7
Dependent Claim
22 words
Indicator as in claim 5, the means for mounting establishing alignment of the reed relay with a magnetic field surrounding the conductor.
Claim 8
Dependent Claim
18 words
Indicator as in claim 6, the means for mounting adapted for changing the alignment to desensitize the indicator.
Claim 9
Dependent Claim
11 words
Indicator as in claim 1, said battery being a lithium battery.
Claim 10
Dependent Claim
13 words
Indicator as in claim 1, and including additional means for resetting the latch.
Claim 11
Dependent Claim
23 words
Indicator as in claim 9, said additional means being responsive emission of electromagnetic waves, accompanying resumption of normal current flow in the conductor.
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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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |