GB568827A - Improvements in and relating to electric temperature control apparatus - Google Patents
Improvements in and relating to electric temperature control apparatusInfo
- Publication number
- GB568827A GB568827A GB16105/43A GB1610543A GB568827A GB 568827 A GB568827 A GB 568827A GB 16105/43 A GB16105/43 A GB 16105/43A GB 1610543 A GB1610543 A GB 1610543A GB 568827 A GB568827 A GB 568827A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rheostat
- shunt
- blanket
- hours
- oct
- 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
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
- H05B1/0213—Switches using bimetallic elements
-
- 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
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
- H05B1/0225—Switches actuated by timers
Landscapes
- Control Of Resistance Heating (AREA)
Abstract
568,827. Electric blankets. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 1, 1943, No. 16105. Convention date, Oct. 1, 1942. [Class 40 (i)] In a system in which the heating circuit of an electric blanket is periodically opened and closed by a thermal switch which comprises a bimetallic strip 9 exposed to the ambient temperature and co-operating with a contact 10, the strip being heated by a coil 11 while the circuit is closed, an adjustable rheostat 14 is arranged to be connected in parallel with the coil 11 at predetermined times of the day by means of a clock-driven slider 18 so as to decrease the effect of a given blanket current on the bimetallic strip and thus increase the heat input to the blanket. As shown, the rheostat 14 consists of a resistance wire 16 wound on one quadrant of a ring 17 in series with a flat contact 20 occupying an adjacent quadrant. The slider 18 makes a revolution in twenty-four hours, so that in a period of twelve hours the shunt resistance is gradually reduced for the first six hours and is then maintained at its minimum value. The ring 17 is adjustable to determine when the shunt is to be operative. The shunt may also include a threeposition rheostat 23 by which the user may determine whether the additional heat shall be a small, medium or large increase over the normal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US568827XA | 1942-10-01 | 1942-10-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB568827A true GB568827A (en) | 1945-04-23 |
Family
ID=22007131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16105/43A Expired GB568827A (en) | 1942-10-01 | 1943-10-01 | Improvements in and relating to electric temperature control apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB568827A (en) |
-
1943
- 1943-10-01 GB GB16105/43A patent/GB568827A/en not_active Expired
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