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 Title: |
US5270509:
Microwave clothes drying system and method with improved arc detection
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Gerling, John E.; Twain Harte, CA
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| Assignee: |
Electric Power Research Institute, Palo Alto, CA
other patents from ELECTRIC POWER RESEARCH INSTITUTE, INC. (167035) (approx. 834)
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| Published / Filed: |
1993-12-14
/ 1991-12-24
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| Application Number: |
US1991000813359
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| IPC Code: |
Advanced:
D06F 58/26;
H05B 6/66;
Core:
D06F 58/20;
more...
IPC-7:
H05B 6/68;
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| ECLA Code: |
D06F58/26M; H05B6/66S; H05B6/68C;
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| U.S. Class: |
Current:
219/716;
034/260;
219/745;
Original:
219/010.55B;
219/010.55R;
219/010.55M;
034/001.Q;
034/001.P;
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| Field of Search: |
219/10.55 R,10.55 M,10.55 F,10.55 B,10.55 A
034/1 Q,1 P,1 DD,1 R
361/1;2
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| Priority Number: |
| 1991-12-24 |
US1991000813359 |
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| Abstract: |
Microwave drying system and method in which arcing is detected by a sudden drop in electric field strength within the drying chamber. An electric signal corresponding to field strength is provided and, in one disclosed embodiment, is compared with a reference signal which varies with changes in field strength which occur more slowly than changes due to arcing. The two signals are compared, and an output signal is provided if the two signal differ by more than a predetermined amount. This permits the sudden drop which accompanies arcing to be distinguished from more gradual changes in the electric field which occur, for example, as moisture is evaporated from the clothing or other articles being dried.
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| Attorney, Agent or Firm: |
Flehr, Hohbach, Test et al. ;
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| Primary / Asst. Examiners: |
Leung, Philip H.;
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
BR DE KR SE
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| Family: |
Show 8 known family members
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First Claim:
Show all 12 claims |
I claim:
1. In a microwave clothes dryer: a drying chamber for receiving fabrics to be dried, means for introducing microwave energy into the chamber to evaporate moisture from the fabrics, and means for monitoring electric field strength within the chamber and providing an output signal in the event of a decrease in the field strength due to arcing.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 8 U.S. patent(s) that reference this one
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