US4723068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric power control device in an automatic temperature adjusting apparatus
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1986-02-24
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Granted: 1988-02-02
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Expires: 2006-02-24
Abstract
Abstract An electric power control device is composed of plural resistor loads (1 0 -1 4 ) the heat-generating powers of which are different from one another, switch means (3 0 -3 4 ) connected in series to each of the resistor loads and adapted for the ON-OFF control of an ac power (2), and means (4 0 -4 4 ) for ON-OFF controlling the switch means so as to turn on or turn off the ac power and also for selectively controlling the individual resistor loads so as to adjust the heat-generating powers of all of the resistor loads in accordance with their corresponding desired heat-generating powers.
Inventors
- 👤 Tatsufumi Kusuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:53
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/1906; G05D23/1912
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
An electronic power control device, comprising: a plurality of resistive loads the heat-generating powers of which vary from one another by successive integer exponential powers of a preselected number; a plurality of switch means each connected in series to a different one of said resistive loads and adapted for ON-OFF control of AC power to said load; and means for ON-OFF controlling the switch means to turn on or turn off the AC power and also, whenever change in power to said resistive loads is desired, for controlling the individual resistive loads to adjust the collective heat-generating power of said resistive loads in a stepwise manner by stepping said power up or down by a constant value.
Claim 2
Dependent Claim
117 words
An electronic power control device, comprising: a plurality of resistive loads the heat-generating powers of which vary from one another by successive integer exponential powers of a preselected number; a plurality of switch means each connected in series to a different one of said resistive loads and adapted for ON-OFF control of AC power to said load; and means for ON-OFF controlling the switch means to turn on or turn off the AC power and also, whenever change in power to said resistive loads is desired, for controlling the individual resistive loads to adjust the collective heat-generating power of said resistive loads in a stepwise manner by stepping said power up or down by a constant value.
Claim 3
Dependent Claim
39 words
An electric power control device as claimed in claim 1, wherein said controlling means comprises a binary counter having a plurality of binary outputs, each of said binary ouputs being coupled to a resistive one of said resistive layers.
Claim 4
Dependent Claim
160 words
An electronic power control device, comprising: a plurality of resistive loads the heat-generating powers of which vary from one another by successive integer exponential powers of 2; a plurality of switch means each connected in series to a different one of said resistive loads and adapted for ON-OFF control to AC power to said load; and means for ON-OFF controlling the switch means to turn on or turn off the AC power and also, whenever change in power to said resistive loads is desired, for controlling the individual resistive loads to adjust the collective heat-generating powers of said resistive loads in a stepwise manner by stepping said power up or down by a constant value; said means for ON-OFF controlling the switch means including a binary counter with a plurality of outputs of successive integer exponential powers of 2, each of said outputs connected to a corresponding one of said resistive loads via a respective one of said switch means.
Claim 5
Dependent Claim
160 words
An electronic power control device, comprising: a plurality of resistive loads the heat-generating powers of which vary from one another by successive integer exponential powers of 2; a plurality of switch means each connected in series to a different one of said resistive loads and adapted for ON-OFF control to AC power to said load; and means for ON-OFF controlling the switch means to turn on or turn off the AC power and also, whenever change in power to said resistive loads is desired, for controlling the individual resistive loads to adjust the collective heat-generating powers of said resistive loads in a stepwise manner by stepping said power up or down by a constant value; said means for ON-OFF controlling the switch means including a binary counter with a plurality of outputs of successive integer exponential powers of 2, each of said outputs connected to a corresponding one of said resistive loads via a respective one of said switch means.
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) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |