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US4580025A
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Apparatus and method for altering computational constants of microwave oven
Assignee: Maytag Corp
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Filing: 1984-01-16
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Granted: 1986-04-01
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Expires: 2004-01-16
Abstract
Abstract Apparatus and method for altering computational constants stored in an EAROM of a microwave oven microcomputer. In the normal or operational mode, the microwave oven control panel is used by the operator to enter control data for the microwave oven. After a mode determining signal is applied to the microcomputer by grounding one of its specified ports, new computational constants can be entered through the control panel and stored in the EAROM so as to alter the operating characteristics of the oven.
Inventors
- 👤 Roger W. Carlson
- 👤 Bradford J. Diesch
- 👤 Rex E. Fritts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:47
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6435; H05B6/6438; H05B6/6447; H05B6/645; H05B6/6464; H05B6/72; H05B6/725
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
141 words
A microwave oven, comprising: a microwave cavity; a source of microwave energy coupled to said cavity; a microcomputer; a scale coupled to said cavity for providing a signal corresponding to the weight of food positioned in said cavity, said weight corresponding signal being coupled to said microcomputer; said microcomputer controlling said source of microwave energy in response to calculations in accordance with said weight corresponding signal; a control panel connected to said microcomputer; and means for providing a mode determining signal to said microcomputer wherein, in one mode, operator control data for controlling operation of said oven is input to said microcomputer through said control panel and, in a second mode, a time period calculation coefficient compensating for the maximum output power of said source being different than a predetermined standard power is input to said microcomputer through said control panel.
Claim 2
Dependent Claim
141 words
A microwave oven, comprising: a microwave cavity; a source of microwave energy coupled to said cavity; a microcomputer; a scale coupled to said cavity for providing a signal corresponding to the weight of food positioned in said cavity, said weight corresponding signal being coupled to said microcomputer; said microcomputer controlling said source of microwave energy in response to calculations in accordance with said weight corresponding signal; a control panel connected to said microcomputer; and means for providing a mode determining signal to said microcomputer wherein, in one mode, operator control data for controlling operation of said oven is input to said microcomputer through said control panel and, in a second mode, a time period calculation coefficient compensating for the maximum output power of said source being different than a predetermined standard power is input to said microcomputer through said control panel.
Claim 3
Dependent Claim
23 words
The microwave oven recited in claim 1 wherein said providing means comprises means for grounding a mode determining input port of said microcomputer.
Claim 4
Dependent Claim
124 words
A microwave oven, comprising: a microwave cavity; a source of microwave energy coupled to said cavity; a control panel; a microcomputer for controlling the operation of said microwave oven, said microcomputer having a first memory for storing operator input data from said control panel and a second memory for storing computational constants wherein at least one of said constants corresponds to the maximum output power of said source; and means for providing a mode determining signal to said microcomputer wherein, in one mode, said operator input data is entered from said control panel and stored in said first memory and, in a second mode, a value for said output power corresponding constant is entered from said control panel and stored in said second memory.
Claim 5
Dependent Claim
124 words
A microwave oven, comprising: a microwave cavity; a source of microwave energy coupled to said cavity; a control panel; a microcomputer for controlling the operation of said microwave oven, said microcomputer having a first memory for storing operator input data from said control panel and a second memory for storing computational constants wherein at least one of said constants corresponds to the maximum output power of said source; and means for providing a mode determining signal to said microcomputer wherein, in one mode, said operator input data is entered from said control panel and stored in said first memory and, in a second mode, a value for said output power corresponding constant is entered from said control panel and stored in said second memory.
Claim 6
Dependent Claim
23 words
The microwave oven recited in claim 3 wherein said providing means comprises means for grounding a mode determining input port of said microcomputer.
Claim 7
Dependent Claim
147 words
A microwave oven, comprising: a microwave cavity; a source of microwave energy coupled to said cavity; a microcomputer for controlling said microwave oven, said microcomputer comprising a random access memory for storing operational data and an electrically alterable read-only memory for storing computational constants used in calculating time periods for activation of said source of microwave energy wherein at least one of said constants corresponds to the maximum power output of said source to compensate for the difference in cooking time as compared to a standard power output; a control panel connected to said microcomputer; and means for providing a mode determining signal to said microcomputer, wherein, in one mode, said operational data is entered through said control panel and stored in said random access memory and, in a second mode, computational constants are entered through said control panel and stored in said electrically alterable read-only memory.
Claim 8
Dependent Claim
147 words
A microwave oven, comprising: a microwave cavity; a source of microwave energy coupled to said cavity; a microcomputer for controlling said microwave oven, said microcomputer comprising a random access memory for storing operational data and an electrically alterable read-only memory for storing computational constants used in calculating time periods for activation of said source of microwave energy wherein at least one of said constants corresponds to the maximum power output of said source to compensate for the difference in cooking time as compared to a standard power output; a control panel connected to said microcomputer; and means for providing a mode determining signal to said microcomputer, wherein, in one mode, said operational data is entered through said control panel and stored in said random access memory and, in a second mode, computational constants are entered through said control panel and stored in said electrically alterable read-only memory.
Claim 9
Independent Claim
101 words
The method of calibrating a microwave oven having a control panel connected to a microcomputer with an electrically alterable read-only memory for storing computational constants, comprising the steps of: measuring the microwave power of said microwave oven; comparing said measured power to a predetermined standard power; determining a calculation coefficient for compensating for the difference in time between cooking at said measured power and said predetermined standard power; and providing a mode determining signal to said microcomputer, said signal providing for entry of said coefficient through said control panel and enabling said electrically alterable read-only memory for storing said coefficient therein.
Claim 10
Independent Claim
101 words
The method of calibrating a microwave oven having a control panel connected to a microcomputer with an electrically alterable read-only memory for storing computational constants, comprising the steps of: measuring the microwave power of said microwave oven; comparing said measured power to a predetermined standard power; determining a calculation coefficient for compensating for the difference in time between cooking at said measured power and said predetermined standard power; and providing a mode determining signal to said microcomputer, said signal providing for entry of said coefficient through said control panel and enabling said electrically alterable read-only memory for storing said coefficient therein.
References Cited (Backward Citations)
US3259056A
Cited
US3813918A
Cited
US3932723A
Cited
US4009359A
Cited
US4255639A
Cited
US4328408A
Cited
US4345132A
Cited
US4317977A
Cited
US4299115A
Cited
US4280180A
Cited
US4390768A
Cited
US4437159A
Cited
US4431893A
Cited
USPTO Annuity & Maintenance Windows
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|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |