Patent US5021728A successfully refreshed from Google Patents.
US5021728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power source apparatus for electronic equipment
Assignee: Canon Inc
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Filing: 1989-11-15
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Granted: 1991-06-04
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Expires: 2009-11-15
Abstract
Abstract A power source apparatus used in electronic equipment includes a power source for supplying a power source voltage, a voltage transformer for transforming the power source voltage supplied from the power source into a voltage different from the power source voltage, a load driven by the voltage supplied from the power source, a transistor for switching between the voltage output from the voltage transformer and the voltage directly output from the power source and supplying one of the voltages output from the voltage transformer and the power source to the load, and a controller for switching the transistor to select the voltage output from the voltage transformer when a level of the power source voltage exceeds a predetermined value, and for switching the transistor to select the voltage directly output from the power source when the level of the power source voltage is below the predetermined value.
Inventors
- 👤 Shoji Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:52
CPC Classifications
H; H02; H02P; H02P29/00; H02P29/02; H02P29/024; H02P29/026; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/62; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02P8/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
179 words
A power source apparatus used in electronic equipment, comprising: a power source for supplying a power source voltage; voltage transforming means for transforming the power source voltage supplied from said power source into a voltage different from the power source voltage; driving means driven by one of the voltage output from said voltage transforming means and a voltage obtained directly from the power source voltage, said driving means being settable in one of first and second conditions; switching means for switching between the voltage output from said voltage transforming means and the voltage obtained directly from the power source voltage and for supplying one of the voltage output from said voltage transforming means and the voltage obtained directly from said power source to said driving means; and control means for switching said switching means to select the voltage output from said voltage transforming means when said driving means is in the first condition, and for switching said switching means to select the voltage obtained directly from the power source voltage when said driving means is in the second condition.
Claim 2
Dependent Claim
179 words
A power source apparatus used in electronic equipment, comprising: a power source for supplying a power source voltage; voltage transforming means for transforming the power source voltage supplied from said power source into a voltage different from the power source voltage; driving means driven by one of the voltage output from said voltage transforming means and a voltage obtained directly from the power source voltage, said driving means being settable in one of first and second conditions; switching means for switching between the voltage output from said voltage transforming means and the voltage obtained directly from the power source voltage and for supplying one of the voltage output from said voltage transforming means and the voltage obtained directly from said power source to said driving means; and control means for switching said switching means to select the voltage output from said voltage transforming means when said driving means is in the first condition, and for switching said switching means to select the voltage obtained directly from the power source voltage when said driving means is in the second condition.
Claim 3
Dependent Claim
14 words
An apparatus according to claim 1, wherein said driving means is a stepping motor.
Claim 4
Dependent Claim
24 words
An apparatus according to claim 2, wherein said stepping motor is rotated in the first condition and is at rest in the second condition.
Claim 5
Dependent Claim
13 words
An apparatus according to claim 1, wherein said driving means is a solenoid.
Claim 6
Dependent Claim
15 words
An apparatus according to claim 1, wherein said driving means is a thermal printing head.
Claim 7
Dependent Claim
205 words
A power source apparatus used in electronic equipment, comprising: a power source for supplying a power source voltage; voltage transforming means for transforming the power source voltage supplied from said power source into a voltage different from the power source voltage; driving means driven by one of the voltage output from said voltage transforming means and a voltage obtained directly from the power source voltage, said driving means being settable in one of first and second conditions; switching means for switching between the voltage output from said voltage transforming means and the voltage obtained directly from the power source voltage and for supplying one of the voltage output from said voltage transforming means and the voltage obtained directly from said power source voltage to said driving means; first control means for switching said switching means to select the voltage output from said voltage transforming means when said driving means is in the first condition and for switching said switching means to select the voltage obtained directly from the power source voltage when said driving means is in the second condition; and second control means for adjusting the voltage obtained directly from the power source voltage in response to the level of the power source voltage.
Claim 8
Dependent Claim
205 words
A power source apparatus used in electronic equipment, comprising: a power source for supplying a power source voltage; voltage transforming means for transforming the power source voltage supplied from said power source into a voltage different from the power source voltage; driving means driven by one of the voltage output from said voltage transforming means and a voltage obtained directly from the power source voltage, said driving means being settable in one of first and second conditions; switching means for switching between the voltage output from said voltage transforming means and the voltage obtained directly from the power source voltage and for supplying one of the voltage output from said voltage transforming means and the voltage obtained directly from said power source voltage to said driving means; first control means for switching said switching means to select the voltage output from said voltage transforming means when said driving means is in the first condition and for switching said switching means to select the voltage obtained directly from the power source voltage when said driving means is in the second condition; and second control means for adjusting the voltage obtained directly from the power source voltage in response to the level of the power source voltage.
Claim 9
Dependent Claim
14 words
An apparatus according to claim 6, wherein said driving means is a stepping motor.
Claim 10
Dependent Claim
24 words
An apparatus according to claim 7, wherein said stepping motor is rotated in the first condition and is at rest in the second condition.
Claim 11
Dependent Claim
13 words
An apparatus according to claim 6, wherein said driving means is a solenoid.
Claim 12
Dependent Claim
15 words
An apparatus according to claim 6, wherein said driving means is a thermal printing head.
Claim 13
Dependent Claim
112 words
A power source apparatus used in electronic equipment, comprising: a power source for supplying a power source voltage; voltage transforming means for transforming the power source voltage supplied from said power source into a voltage different from the power source voltage; driving means driven by the voltage supplied from said power source; switching means for switching between the voltage output from said voltage transforming means and the voltage directly output from said power source and supplying one of the voltages output from said voltage transforming means and said power source to said driving means; and control means for switching said switching means in accordance with an operating state of said driving means.
Claim 14
Dependent Claim
112 words
A power source apparatus used in electronic equipment, comprising: a power source for supplying a power source voltage; voltage transforming means for transforming the power source voltage supplied from said power source into a voltage different from the power source voltage; driving means driven by the voltage supplied from said power source; switching means for switching between the voltage output from said voltage transforming means and the voltage directly output from said power source and supplying one of the voltages output from said voltage transforming means and said power source to said driving means; and control means for switching said switching means in accordance with an operating state of said driving means.
Claim 15
Dependent Claim
14 words
An apparatus according to claim 11, wherein said driving means is a stepping motor.
Claim 16
Dependent Claim
24 words
An apparatus according to claim 12, wherein said stepping motor is rotated in the first condition and is at rest in the second condition.
Claim 17
Dependent Claim
13 words
An apparatus according to claim 11, wherein said driving means is a solenoid.
Claim 18
Dependent Claim
15 words
An apparatus according to claim 11, wherein said driving means is a thermal printing head
References Cited (Backward Citations)
US4441825A
Cited
US4404624A
Cited
US4485432A
Cited
US4528459A
Cited
US4683382A
Cited
US4730122A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |