GB1258106A - - Google Patents
Info
- Publication number
- GB1258106A GB1258106A GB1845469A GB1258106DA GB1258106A GB 1258106 A GB1258106 A GB 1258106A GB 1845469 A GB1845469 A GB 1845469A GB 1258106D A GB1258106D A GB 1258106DA GB 1258106 A GB1258106 A GB 1258106A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- heater
- thyristor
- fuse
- blowing
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
- G05D23/1909—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can only take two discrete values
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Resistance Heating (AREA)
- Control Of Temperature (AREA)
Abstract
1,258,106. Automatic temperature control systems. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. April 10, 1969, No. 18454/69. Heading G3R. A firing circuit for a controlled rectifier e. g. a thyristor 8 serially connected with an electric blanket heater 4, 4<SP>1</SP> comprises detector wires 16, 16<SP>1</SP> separated by a temperature dependent layer 32, which below a temperature determined by series resistor 14 causes a neon lamp 18 to discharge once per half cycle. The current pulses are transmitted through a pulse transformer 20, 21 to the thyristor gate with an angular delay depending on temperature. The neon may be replaced by a bi-directional switch (19) Fig. 10 (not shown). A capacitor 21 and choke 5 reduce electrical interference, and a resistor 6 and capacitor 7 prevent spurious firing. A diode 2 increases current flow should thyristor 18 become internally short circuited thus blowing a fuse 8, and a layer 29 of say nylon 6 or 610 between heater parts 4, 4<SP>1</SP> fuses above a determined temperature say 150-200‹ C. causing a shunt between the two parts hence also blowing the fuse. The heater and detector coils may be spaced more closely near the foot of the blanket than the head, see Fig. 7 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1845469 | 1969-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1258106A true GB1258106A (en) | 1971-12-22 |
Family
ID=10112718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1845469A Expired GB1258106A (en) | 1969-04-10 | 1969-04-10 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1258106A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2207014A (en) * | 1987-07-11 | 1989-01-18 | Thermonette Appliances Ltd | Electrically-powered heating panels |
| GB2267189A (en) * | 1992-05-14 | 1993-11-24 | Thermonette Appliances Ltd | Improvements in or relating to electrically-powered heating panels. |
-
1969
- 1969-04-10 GB GB1845469A patent/GB1258106A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2207014A (en) * | 1987-07-11 | 1989-01-18 | Thermonette Appliances Ltd | Electrically-powered heating panels |
| GB2207014B (en) * | 1987-07-11 | 1991-05-08 | Thermonette Appliances Ltd | Improvements in or relating to electrically-powered heating panels |
| GB2267189A (en) * | 1992-05-14 | 1993-11-24 | Thermonette Appliances Ltd | Improvements in or relating to electrically-powered heating panels. |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 746 | Register noted 'licences of right' (sect. 46/1977) | ||
| PE20 | Patent expired after termination of 20 years |