GB695808A - Improvements in or relating to shoe stiffener heating apparatus adapted for heating stiffener material by use of the heating effect of a high frequency electric field - Google Patents
Improvements in or relating to shoe stiffener heating apparatus adapted for heating stiffener material by use of the heating effect of a high frequency electric fieldInfo
- Publication number
- GB695808A GB695808A GB2138850A GB2138850A GB695808A GB 695808 A GB695808 A GB 695808A GB 2138850 A GB2138850 A GB 2138850A GB 2138850 A GB2138850 A GB 2138850A GB 695808 A GB695808 A GB 695808A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heating
- voltage
- stiffener
- lines
- relating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/48—Circuits
- H05B6/50—Circuits for monitoring or control
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Central Heating Systems (AREA)
Abstract
695,808. Automatic voltage control. BRITISH UNITED SHOE MACHINERY CO., Ltd. Aug. 29, 1951 [Aug. 30, 1950], No. 21388/50. Addition to 595,140, [Group XI]. Class 38 (iv). [Also in Group XI] In an automatic voltage control of an oscillator in dielectric heating (see Group XI), the voltage between lines 204, 314 is held constant by automatically varying the negative grid bias of a full wave rectifier 200, 201. A 'portion of the output voltage is tapped off at 294 and applied to the grid 281 of a valve 280, which is thereby controlled and varies the drop in resistance 260 connected to a voltage regulator valve 299 and to an adjustable tapping 206 on a voltage divider between the terminals 250, 270 of an auxiliary power supply 251. If the voltage between the lines 204, 314 falls, the negative bias on the valve 280 also falls; and the subsequent increase in current through the resistor 260 decreases the negative grid bias of the rectifier 200, 201, thereby tending to increase the voltage between the lines 204, 314.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2138850A GB695808A (en) | 1950-08-30 | 1950-08-30 | Improvements in or relating to shoe stiffener heating apparatus adapted for heating stiffener material by use of the heating effect of a high frequency electric field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2138850A GB695808A (en) | 1950-08-30 | 1950-08-30 | Improvements in or relating to shoe stiffener heating apparatus adapted for heating stiffener material by use of the heating effect of a high frequency electric field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB695808A true GB695808A (en) | 1953-08-19 |
Family
ID=10162083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2138850A Expired GB695808A (en) | 1950-08-30 | 1950-08-30 | Improvements in or relating to shoe stiffener heating apparatus adapted for heating stiffener material by use of the heating effect of a high frequency electric field |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB695808A (en) |
-
1950
- 1950-08-30 GB GB2138850A patent/GB695808A/en not_active Expired
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