Patent US3906251A successfully refreshed from Google Patents.
US3906251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plurality of selective sources for converter system
Assignee: Sony Corp
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Filing: 1974-06-07
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Granted: 1975-09-16
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Expires: 1994-06-07
Abstract
Abstract An electric source circuit is disclosed which comprises a switch for opening closed circuit consisting of first and second direct current sources, an over discharge indicator circuit provided for the first direct current source and a kick circuit provided for a DC-DC converter inclusive of a pulse oscillator when an electric source switch common to both the first and second direct current sources is OFF. This switch when closed applies a sufficiently large kick voltage to the pulse oscillator to reliably oscillate the pulse oscillator which ensure a positive current supply from the second direct current sources to the load.
Inventors
- 👤 Kikuo Tanida
- 👤 Kenro Teraoka
- 👤 Yuji Inomata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:25
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/10; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/061; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33507; H02M3/33523; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1607
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
An electric source circuit comprising a first direct current source, a second direct current source, an electric source switch common to both said first and second current sources, a load, a DC-DC converter inclusive of a pulse oscillator and for converting the voltage from said second direct current source into a given voltage and supplying said given voltage to said load, a kick circuit for said DC-DC converter and an overdischarge indicator circuit provided for said first direct current source whereby the voltage from said first direct current source is directly supplied to said load and the voltages from said first and second direct current sources are selectively supplied to said load, said electric source circuit comprising a switch for opening a closed circuit consisting of said first and second direct current sources, overdischarge indicator circuit and kick circuit for said DC-DC converter when said electric source switch is OFF.
Claim 2
Dependent Claim
150 words
An electric source circuit comprising a first direct current source, a second direct current source, an electric source switch common to both said first and second current sources, a load, a DC-DC converter inclusive of a pulse oscillator and for converting the voltage from said second direct current source into a given voltage and supplying said given voltage to said load, a kick circuit for said DC-DC converter and an overdischarge indicator circuit provided for said first direct current source whereby the voltage from said first direct current source is directly supplied to said load and the voltages from said first and second direct current sources are selectively supplied to said load, said electric source circuit comprising a switch for opening a closed circuit consisting of said first and second direct current sources, overdischarge indicator circuit and kick circuit for said DC-DC converter when said electric source switch is OFF.
Claim 3
Dependent Claim
74 words
An electric source circuit as claimed in claim 1, wherein said switch is composed of a transistor whose emitter is grounded, base is connected through a resistor and a diode to said load and collector is connected to said overdischarge indicator circuit provided for said first direct current source and connected through a series circuit including resistors to a junction point between said direct current source and said kick circuit for said DC-DC converter.
Claim 4
Dependent Claim
56 words
An electric source circuit as claimed in claim 2, wherein said transistor is of NPN type and said resistors included in said series circuit between said collector of said transistor and said junctin point between said second direct current source and said kick circuit are of the order of 18K Omega and 3.5K Omega , respectively.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |