Patent US3899737A successfully refreshed from Google Patents.
US3899737A
Expired / Lapsed
US
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Apparatus for testing alternator diodes
Assignee: Individual
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Filing: 1972-10-12
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Granted: 1975-08-12
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Expires: 1992-10-12
Abstract
Abstract An apparatus for testing alternator diodes, such as in automobile alternators, has a plurality of coupling means for connection respectively to the diode to be tested, the alternator, and the positive and negative terminals of an electrical energy source. The apparatus also has an amperage metering circuit having means for indicating the amperage of current flowing in either direction, and a current limiting circuit having current limiting means for controlling the amount of current passing through the diode. Circuit means are provided for alternately connecting the amperage metering circuit and current limiting circuit respectively with the positive and negative electrical energy source terminals for reversing the flow of current through the test apparatus.
Inventors
- 👤 Owen Aston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:37
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/36; G01R31/00; G01R31/005; G01R31/006; G01R31/26; G01R31/2607; G01R31/2632
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
APparatus for testing alternator diodes, comprising in combination: coupling means comprising first, second, third, and fourth couplings adapted for connection respectively to the negative terminal of an electrical source, the positive terminal of an electrical source, an alternator and to a diode of said alternator; an amperage metering circuit having means for indicating amperage of current flowing in either direction in the circuit, said circuit being connected in series with the third coupling; a current limiting circuit having current limiting choke means, said circuit being connected in series with the fourth coupling, circuit switching means having means for alternately connecting said amperage metering circuit with the first coupling and with the second coupling and for alternately connecting said current limiting circuit with said first coupling and with said second coupling and switching means disposed between said third and fourth couplings for alternatively closing and opening the circuit between said couplings.
Claim 2
Dependent Claim
150 words
APparatus for testing alternator diodes, comprising in combination: coupling means comprising first, second, third, and fourth couplings adapted for connection respectively to the negative terminal of an electrical source, the positive terminal of an electrical source, an alternator and to a diode of said alternator; an amperage metering circuit having means for indicating amperage of current flowing in either direction in the circuit, said circuit being connected in series with the third coupling; a current limiting circuit having current limiting choke means, said circuit being connected in series with the fourth coupling, circuit switching means having means for alternately connecting said amperage metering circuit with the first coupling and with the second coupling and for alternately connecting said current limiting circuit with said first coupling and with said second coupling and switching means disposed between said third and fourth couplings for alternatively closing and opening the circuit between said couplings.
Claim 3
Dependent Claim
18 words
Apparatus as set forth in claim 1, wherein said circuit switching means comprises a double pole toggle switch.
Claim 4
Dependent Claim
16 words
Apparatus as set forth in claim 1, wherein a fuse is connected to the first coupling.
Claim 5
Dependent Claim
16 words
Apparatus as set forth in claim 1, wherein a fuse is connected to the second coupling.
Claim 6
Dependent Claim
17 words
Apparatus as set forth in claim 1, wherein said switching means comprises a single pole toggle switch.
Claim 7
Dependent Claim
23 words
Apparatus as set forth in claim 1, wherein signaling means is disposed in said circuit means for signaling when the circuit is closed.
Claim 8
Dependent Claim
15 words
Apparatus as set forth in claim 6, wherein said signaling means comprises a light source.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |