GB456795A - Improvements in and relating to electrical apparatus for automatically controlling avariable - Google Patents
Improvements in and relating to electrical apparatus for automatically controlling avariableInfo
- Publication number
- GB456795A GB456795A GB1323/36A GB132336A GB456795A GB 456795 A GB456795 A GB 456795A GB 1323/36 A GB1323/36 A GB 1323/36A GB 132336 A GB132336 A GB 132336A GB 456795 A GB456795 A GB 456795A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- kiln
- speed
- temperature
- grid
- 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
- G05D23/27—Control of temperature characterised by the use of electric means with sensing element responsive to radiation
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
456,795. Automatic control systems. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. Jan. 15, 1936, No. 1323. Convention date, Jan. 16, 1935. [Class 38 (iv)] Temperature &c.-In apparatus for the control of a variable wherein triodes, or like discharge devices, are rendered conducting or non-conducting by change in the grid or like control voltage, an opposed voltage in the grid or like control circuit is varied according to the correction effected so that the discharge devices are restored to their initial state and hunting is avoided. In a rotary kiln 10 the temperature of the contents is controlled by a photo-electric cell 18 controlling the grid potential of an amplifier 19 the output circuit of which includes resistance 33. The rate at which the contents travel through the kiln is varied to control the temperature by changing the speed of a commutator motor 12 rotating the kiln. A reversible pilot motor 16 adjusts the commutator brushes as required, relays 22, 23 supplied through triodes 20, 21 being provided. A generator 39 circulates a current in a resistance 36 to give a potential drop therein proportional to the speed of the kiln. The grid circuit of the triodes 20, 21 includes a portion of resistances 28, 29, resistance 22 and resistance 36. The first are adjusted so that the valve 20 is non-conducting and the valve 21 is conducting when the temperature in the kiln is normal, i.e., when a normal current is passing in the resistance 33 in the anode circuit of the amplifier 19. Any variation in the potential drop in resistance 33 due to temperature variation will then cause relay 22 or 23 to close its contact and adjust the speed of the kiln, but the change in speed will vary the current in the resistance 36 so that the potential drop therein equalizes the potential drop in resistance 33 and the valves 20, 21 are restored to their original condition, notwithstanding the speed adjustment. Hunting or over regulation is thus prevented.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US456795XA | 1935-01-16 | 1935-01-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB456795A true GB456795A (en) | 1936-11-16 |
Family
ID=21939289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1323/36A Expired GB456795A (en) | 1935-01-16 | 1936-01-15 | Improvements in and relating to electrical apparatus for automatically controlling avariable |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB456795A (en) |
-
1936
- 1936-01-15 GB GB1323/36A patent/GB456795A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1980146A (en) | Time switch device | |
| US1960350A (en) | Automatic balancing arrangement | |
| US2210393A (en) | Regulating system | |
| GB1065427A (en) | Method of and apparatus for controlling aluminium reduction pots | |
| GB456795A (en) | Improvements in and relating to electrical apparatus for automatically controlling avariable | |
| US2729396A (en) | Electronically rebalanced temperature sensing bridge | |
| US2424843A (en) | Self-synchronous remote-control system | |
| USRE23366E (en) | Automatic control of variable | |
| US2762965A (en) | Voltage regulating apparatus of the electronic type | |
| US2012821A (en) | Automatic control of artificial illumination | |
| GB573028A (en) | Improvements in or relating to temperature control systems | |
| US1487108A (en) | Regulating system | |
| GB545866A (en) | Gain control circuits | |
| US2072442A (en) | Method of and apparatus for controlling the flow of fluids | |
| US2403988A (en) | Peak voltage indicator and regulator | |
| US1809625A (en) | Electric control circuits | |
| US2931577A (en) | Improved means for creating and combining signal components in condition control apparatus | |
| US2303110A (en) | Regulating system | |
| US2090224A (en) | Control apparatus | |
| US2601060A (en) | Automatic regulator control | |
| US2373543A (en) | Light sensitive electric valve system | |
| GB489516A (en) | Improvements in and relating to means for automatically controlling registration in printing and other operations on a continuous strip of material | |
| GB454012A (en) | Improvements in electric signalling or controlling systems employing follow-up devices | |
| GB763551A (en) | Improvements in or relating to circuit arrangements for automatically regulating thetemperature of electric ovens | |
| US2525488A (en) | Control system |