GB601121A - Apparatus for maintaining a variable at a substantially constant value - Google Patents
Apparatus for maintaining a variable at a substantially constant valueInfo
- Publication number
- GB601121A GB601121A GB3296/45A GB329645A GB601121A GB 601121 A GB601121 A GB 601121A GB 3296/45 A GB3296/45 A GB 3296/45A GB 329645 A GB329645 A GB 329645A GB 601121 A GB601121 A GB 601121A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- variable
- value
- motor
- contacts
- 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
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/03—Controlling ratio of two or more flows of fluid or fluent material without auxiliary power
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/131—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components
- G05D11/132—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components by controlling the flow of the individual components
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Non-Electrical Variables (AREA)
- Flow Control (AREA)
Abstract
601,121. Automatic control systems. IGRANIC ELECTRIC CO., Ltd. Feb. 9,1945, No. 3296. Convention date, Feb. 9, 1944. [Class 38 (iv)] Variables in general.-In an automatic control system in which the value of a variable is determined by the rate of flow of a medium, the rate of flow of the medium is controlled in accordance with the value of the variable and with the rate of change of the variable, the latter effect being obtained by using a ring type liquid drag device. The Figure shows an arrangement for maintaining the calorific. value of a gas flowing in pipe 10 constant by mixing it with a proportion of air from pipe 11. The air regulating valve 13 is controlled by calorimetric device 16 which rotates shaft 18 in accordance with the calorific value of the mixed gases in pipe 12. Rotation of shaft 18 causes member 39 to rotate so that gears 43 and 44 mounted on a common freely mounted shaft 42-and meshing with segments 45 and 46 cause freely mounted member 50 to rotate, owing to the resistance of the liquid drag device 23, 24 to which segment 45 is attached and also to the increase in tension in one of springs 30 and 31. Rotation of member 50 results in the closure of one of contacts 97g and 97e preparing the circuit of one of relays 95 and 96 for energization, and the displacement of arm 61, 65, arm 61, 65 controls the phase relation between cam 76, which is continuously rotated by motor 64 through planet gears 68, 67 and 71, and directly driven cam 77, by moving planet gear 67 round the motor shaft. If there is no displacement of the system, contacts 78 and 79 associated with cams 76 and 77 remain open ; if the system is displaced however these contacts are periodically closed for a period dependent on the degree of phase displacement, so that one or other of relays 95 and 96 is periodically energized. Relays 96 and 95 control servo-motor 14 operating valve 13, so that closure of the appropriate relay contacts causes the motor to adjust the valve and restore the correct calorific value. Visual indication of any deviation is given by pointer 17 moving over scale 21. In a modification, Fig. 4 (not shown) a cam mounted on the shaft of the planet which engages a fixed follower in such a manner that arm 61 is periodically disengaged from member 57. Member 57 is given a stepped configuration, member 61 being suitably shaped to engage it.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US601121XA | 1944-02-09 | 1944-02-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB601121A true GB601121A (en) | 1948-04-28 |
Family
ID=22027437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3296/45A Expired GB601121A (en) | 1944-02-09 | 1945-02-09 | Apparatus for maintaining a variable at a substantially constant value |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB601121A (en) |
-
1945
- 1945-02-09 GB GB3296/45A patent/GB601121A/en not_active Expired
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