GB788007A - Motorised drives for screw-operated valves - Google Patents
Motorised drives for screw-operated valvesInfo
- Publication number
- GB788007A GB788007A GB729655A GB729655A GB788007A GB 788007 A GB788007 A GB 788007A GB 729655 A GB729655 A GB 729655A GB 729655 A GB729655 A GB 729655A GB 788007 A GB788007 A GB 788007A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spindle
- motor
- actuating
- nut
- sleeve
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Multiple-Way Valves (AREA)
Abstract
788,007. Control of motors. FIRKINS, Ltd., G. & A., and FIRKINS, G. A. March 12, 1956 [March 12,1955], No. 7296/55. Class 38 (3). [Also in Group XXIX] An axially movable valve actuating spindle has a motor drive, the circuit of which includes two limit switches which operate to stop the motor at the ends of the spindle movement. In one example, Fig. 1, a motor 16 drives through a reduction gear-box 19 a pinion 20 which meshes with the toothed periphery of an actuating nut 21 which engages an external thread on a rotatable but axially fixed sleeve 22 the internal thread of which engages a complementary screw-thread on the valve actuating spindle 10. In operation the actuating nut 21 is held by opposed helical springs 27, 28 between contacts 17, 18 of limit switches in the circuit of the motor 16 and the sleeve 22 effects axial movement of the spindle 10. When the spindle 10 reaches the end of its travel the sleeve 22 is locked and the nut 21 moves axially against one or other of the springs 27, 28 and operates the appropriate limit switch contact 17 or 18 to stop the motor. In another example, Fig. 2 (not shown), only one of the limit switch contacts is operated by the actuating nut which is biased by a helical spring away from a plunger which actuates said contact. The other limit switch contact is operated by a plunger controlled by a crosshead fixed to the actuating spindle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB729655A GB788007A (en) | 1955-03-12 | 1955-03-12 | Motorised drives for screw-operated valves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB729655A GB788007A (en) | 1955-03-12 | 1955-03-12 | Motorised drives for screw-operated valves |
Publications (1)
Publication Number | Publication Date |
---|---|
GB788007A true GB788007A (en) | 1957-12-18 |
Family
ID=9830384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB729655A Expired GB788007A (en) | 1955-03-12 | 1955-03-12 | Motorised drives for screw-operated valves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB788007A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0124477A1 (en) * | 1983-03-21 | 1984-11-07 | TEM AG für Elektronik | Positioning device for closing and regulating valves |
-
1955
- 1955-03-12 GB GB729655A patent/GB788007A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0124477A1 (en) * | 1983-03-21 | 1984-11-07 | TEM AG für Elektronik | Positioning device for closing and regulating valves |
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