US3745548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diode monitoring systems
Assignee: EXIDE ELECTRONICS CORPORATION A CORPORATION OF DE
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Filing: 1971-09-28
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Granted: 1973-07-10
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Expires: 1991-09-28
Abstract
Abstract An apparatus for monitoring a rectifier leg which forms a part of a system that is being supplied with electrical power from an external circuit. The rectifier leg has at least first and second series connected rectifier cells. The monitor apparatus includes a source of control power for supplying electrical power to the monitor apparatus as well as to the rectifier leg. The monitor apparatus provides an indication of open and short circuit failure of the rectifier cells while they are in use in the system and being supplied with electrical power from the external circuit or while they are being supplied with electrical power solely by external circuit or while they are being supplied with electrical power solely by the source of control power of the monitor apparatus.
Inventors
- 👤 J Skelton
- 👤 A Relation
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:39
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/26; G01R31/2607; G01R31/2632; G01R31/28; G01R31/317
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
282 words
In a system comprising a rectifier leg including at least first and second series connected rectifier cells and an external circuit arranged to supply electrical power to the rectifier leg, monitor apparaTus for providing an indication of open and short circuit failure of the first and second rectifier cells while the first and second rectifier cells are in use in the system and being supplied with electrical power from the external circuit and while they are not in use in the system and are not being supplied with electrical power from the external circuit, the monitor apparatus comprising: a. indicating means, b. a first monitoring circuit for detecting open and short circuit failure of the first rectifier cell, the first monitoring circuit including first voltage sensing and comparison means operatively associated with the first rectifier cell and being arranged to effect operation of the indicating means when the voltage drop across the first rectifier cell differs a predetermined amount from a preselected reference voltage; c. a second monitoring circuit for detecting open and short circuit failure of the second rectifier cell, the second monitoring circuit including second voltage sensing and comparison means operatively associated with the second rectifier cell and being arranged to effect operation of the indicating means when the voltage drop across the second rectifier cell differs a predetermined amount from a preselected reference voltage; and d. a source of control power for supplying electrical power to the monitor apparatus including the first monitoring circuit and the first rectifier cell, and the second monitoring circuit and the second rectifier cell, said source of control power being independent of the external circuit arranged to supply electrical power to the rectifier leg.
Claim 2
Dependent Claim
282 words
In a system comprising a rectifier leg including at least first and second series connected rectifier cells and an external circuit arranged to supply electrical power to the rectifier leg, monitor apparaTus for providing an indication of open and short circuit failure of the first and second rectifier cells while the first and second rectifier cells are in use in the system and being supplied with electrical power from the external circuit and while they are not in use in the system and are not being supplied with electrical power from the external circuit, the monitor apparatus comprising: a. indicating means, b. a first monitoring circuit for detecting open and short circuit failure of the first rectifier cell, the first monitoring circuit including first voltage sensing and comparison means operatively associated with the first rectifier cell and being arranged to effect operation of the indicating means when the voltage drop across the first rectifier cell differs a predetermined amount from a preselected reference voltage; c. a second monitoring circuit for detecting open and short circuit failure of the second rectifier cell, the second monitoring circuit including second voltage sensing and comparison means operatively associated with the second rectifier cell and being arranged to effect operation of the indicating means when the voltage drop across the second rectifier cell differs a predetermined amount from a preselected reference voltage; and d. a source of control power for supplying electrical power to the monitor apparatus including the first monitoring circuit and the first rectifier cell, and the second monitoring circuit and the second rectifier cell, said source of control power being independent of the external circuit arranged to supply electrical power to the rectifier leg.
Claim 3
Dependent Claim
89 words
In a system as defined in claim 1 wherein the source of control power comprises a transformer having a primary winding connectable to a source of AC power, a first secondary winding and a second secondary winding, the first secondary winding being wound in opposite direction to that of the second secondary winding and supplying electrical power to the first monitoring circuit and the first rectifier cell associated therewith, and the second secondary winding supplying electrical power to the second monitoring circuit and the second rectifier cell associated therewith.
Claim 4
Dependent Claim
134 words
In a system as defined in claim 1 wherein the indicating means comprises an energizable audible alarm device and wherein the first voltage sensing and comparison means includes: a. first energizing means for effecting the energization of the audible alarm device; b. first switch means operatively connected to the first energizing means, the first switch means being operable between a normally closed circuit condition wherein the first energizing means is ineffective to effect operation of audible alarm device, and an open circuit condition wherein the energizing means is effective to effect operation of the audible alarm device; and c. first switch operating means for operating the first switch means to its open circuit condition in response to the voltage drop across the first rectifier cell differing a predetermined amount from the preselected reference voltage.
Claim 5
Dependent Claim
124 words
In a system as defined in claim 3 wherein the second voltage sensing and comparison means includes: a. second energizing means for effecting the energization of the audible alarm device; b. second switch means operatively connected to the second energizing means, the second switch means being operable between a normally closed circuit condition wherein the second energizing means is ineffective to effect operation of the audible alarm device, and an open circuit condition wherein the energizing means is effective to effect operation of the audible alarm device; and c. second switch operating means for operating the second switch means to its open circuit condition in response to the voltage drop across the second rectifier cell differing a predetermined amount from the preselected reference voltage.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |