GB1201481A - Improvements in or relating to means for actuating valves and similar mechanical control devices - Google Patents
Improvements in or relating to means for actuating valves and similar mechanical control devicesInfo
- Publication number
- GB1201481A GB1201481A GB1555667A GB1555667A GB1201481A GB 1201481 A GB1201481 A GB 1201481A GB 1555667 A GB1555667 A GB 1555667A GB 1555667 A GB1555667 A GB 1555667A GB 1201481 A GB1201481 A GB 1201481A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- valve
- responsive member
- bellows
- heat exchanger
- 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
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
1,201,481. Automatic temperature control systems. BRITISH THERMOSTAT CO. Ltd. July 3, 1968 [April 5, 1967], No.15556/67. Heading G3R. An actuator providing a mechanical output for the operation of a valve or similar mechanical control device comprises a temperature responsive member mechanically connected to the valve or other device, an electric heater associated with the temperature responsive member, and temperature sensing means in thermal relationship to the temperature responsive member and connected to control means to regulate the energy to the electric heater in accordance with one or more variables one of which is the temperature of the responsive member. A bellows member 2 actuating a valve 4 controlling a gas supply has a heater 9 supplied from an amplifier according to the temperature measured by an element 8. Another input to the amplifier is derived from a sensing element 10 responsive to a heat exchanger 7 output temperature. In the absence of an output from element 10 the bellows 2 assumes a position dependent on the set point of element 8 which is modified by the element 10 to open or close the valve 4 in accordance with the heat exchanger temperature. The system may be arranged to adjust the temperature of the heat exchanger in accordance with outside conditions, and a bridge or potentiometer circuit may be associated with the amplifier so that other features e.g. room or boiler temperature may be incorporated. Sensing elements 8, 10 may be temperature dependent resistors, thermocouples, transistors, or other temperature dependent devices. The system may be modified to control humidity or pressure, or it may be arranged to act at a remote control device by substituting a manually adjustable resistor for the element 10. The bellows may be replaced by a diaphragm, a bi-metallic element or other differential expansion device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1555667A GB1201481A (en) | 1967-04-05 | 1967-04-05 | Improvements in or relating to means for actuating valves and similar mechanical control devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1555667A GB1201481A (en) | 1967-04-05 | 1967-04-05 | Improvements in or relating to means for actuating valves and similar mechanical control devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1201481A true GB1201481A (en) | 1970-08-05 |
Family
ID=10061255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1555667A Expired GB1201481A (en) | 1967-04-05 | 1967-04-05 | Improvements in or relating to means for actuating valves and similar mechanical control devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1201481A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104460776A (en) * | 2014-10-22 | 2015-03-25 | 北京航空航天大学 | Multi-physical field coupling environment simulation device |
-
1967
- 1967-04-05 GB GB1555667A patent/GB1201481A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104460776A (en) * | 2014-10-22 | 2015-03-25 | 北京航空航天大学 | Multi-physical field coupling environment simulation device |
CN104460776B (en) * | 2014-10-22 | 2017-01-25 | 北京航空航天大学 | Multi-physical field coupling environment simulation device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
PLNP | Patent lapsed through nonpayment of renewal fees |