US3594628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply system for process control instrumentation
Assignee: Combustion Engineering Inc
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Filing: 1969-10-08
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Granted: 1971-07-20
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Expires: 1989-10-08
Abstract
Abstract A power supply system for process control instrumentation includes a regulator providing regulated DC from an AC source and has an emergency battery supply operative upon failure of the AC source. Indicating means in the form of an overdischarge indicator and an under voltage indicator in the form of a ''''lowest of'''' selector are provided. For a full disclosure of the invention, reference should be made to the body of the disclosure.
Inventors
- 👤 Alfred N Gutzmer
- 👤 David A Willett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:51
CPC Classifications
H; H02; H02P; H02P6/00; H02P6/14; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/061; Y; Y10; Y10S; Y10S320/00; Y10S320/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
A battery system having an overdischarge detector; said system including a pair of like batteries of the type having a substantially constant voltage while discharging; said detector being responsive to a voltage applied thereto less than said constant voltage to cause said detector to produce an output indicative of such lesser voltage; a ''''lowest of'''' selector constructed and arranged to permit only the lowest voltage applied thereto to appear at a terminal thereof , said terminal being connected to said detector for application of voltage thereto; said batteries having the voltages of their like terminals applied to said selector.
Claim 2
Dependent Claim
99 words
A battery system having an overdischarge detector; said system including a pair of like batteries of the type having a substantially constant voltage while discharging; said detector being responsive to a voltage applied thereto less than said constant voltage to cause said detector to produce an output indicative of such lesser voltage; a ''''lowest of'''' selector constructed and arranged to permit only the lowest voltage applied thereto to appear at a terminal thereof , said terminal being connected to said detector for application of voltage thereto; said batteries having the voltages of their like terminals applied to said selector.
Claim 3
Independent Claim
213 words
A system including a power source and a load energizable by said source, said power source including a pair of like, electrically-charged storage cell devices, each said device consisting essentially of a series string of individual like storage cells of the type wherein normal cell voltage remains substantially constant throughout the useful life of cell charge, and said devices being connected in parallel such as to have, in effect, a common positive terminal and a common negative terminal; said system also having power source maintenance facilities including means operative to indicate deviation of the voltage between said terminals from a predetermined value equal to the sum of the normal cell voltages of the cells in said series string; said facilities also including a resistance network proportioned and arranged for discharge of said source therethrough for maintenance purposes and independent of said load, and switch means operable to electrically disconnect part of said resistance network from the remainder thereof and to connect said part tO said source for discharge of the latter through said part, said part being proportioned so as to be suitable for discharge of one said device alone therethrough for maintenance purpose; and means for connecting one of said devices at a time, and singly, to said part for discharge therethrough.
Claim 4
Independent Claim
213 words
A system including a power source and a load energizable by said source, said power source including a pair of like, electrically-charged storage cell devices, each said device consisting essentially of a series string of individual like storage cells of the type wherein normal cell voltage remains substantially constant throughout the useful life of cell charge, and said devices being connected in parallel such as to have, in effect, a common positive terminal and a common negative terminal; said system also having power source maintenance facilities including means operative to indicate deviation of the voltage between said terminals from a predetermined value equal to the sum of the normal cell voltages of the cells in said series string; said facilities also including a resistance network proportioned and arranged for discharge of said source therethrough for maintenance purposes and independent of said load, and switch means operable to electrically disconnect part of said resistance network from the remainder thereof and to connect said part tO said source for discharge of the latter through said part, said part being proportioned so as to be suitable for discharge of one said device alone therethrough for maintenance purpose; and means for connecting one of said devices at a time, and singly, to said part for discharge therethrough.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |