GB555710A - Improvements in electric switches for motor-driven pumps - Google Patents
Improvements in electric switches for motor-driven pumpsInfo
- Publication number
- GB555710A GB555710A GB989242A GB989242A GB555710A GB 555710 A GB555710 A GB 555710A GB 989242 A GB989242 A GB 989242A GB 989242 A GB989242 A GB 989242A GB 555710 A GB555710 A GB 555710A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- lever
- valve
- switch
- latch
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
Landscapes
- Preventing Unauthorised Actuation Of Valves (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
555,710. Regulating delivery of pumps ; switches held set and freed mechanically. ELECTRICAL APPARATUS CO., Ltd., and WALTON, J. R. July 16, 1942, No. 9892. [Class 102 (i)] [Also in Group XXXVII] In an arrangement wherein a pump is driven by an electric motor and the operation of a valve in one or more delivery lines of the pump also operates a switch to start and stop the motor, the switch has a delayed opening action so that repeated closing or opening of the valve for "topping up" purposes does not cause a corresponding repeated stopping and starting of the motor. The valve is controlled by a pivoted lever (not shown) which also is arranged to actuate two push rods 12, 13, pushing one in while the other is released. The rod 12, when pushed in, turns a bell-crank lever 19 into the position shown in which a contact 30 spring-supported on a horizontally-moving bar 20 engages fixed contacts 29 and the motor is started. The lever 19 is held in the position shown by a latch 23. When the valve is closed, rod 13 is pushed in and the latch 23 released, allowing the parts 19, 20 to move slowly to the left under the restraining influence of clockwork 36, so that the contacts 30, 29 are not opened till after a time interval. An emergency switch 37, 50, adapted to stop the motor by operation of a hand lever 39 projecting from the casing, may also be provided. The lever 39 when moved to the right depresses contact spring 50 and releases contact spring 37 which moves to the left. Resetting can only be effected by removing the cover 41 and actuating a push button 42.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB989242A GB555710A (en) | 1942-07-16 | 1942-07-16 | Improvements in electric switches for motor-driven pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB989242A GB555710A (en) | 1942-07-16 | 1942-07-16 | Improvements in electric switches for motor-driven pumps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB555710A true GB555710A (en) | 1943-09-03 |
Family
ID=9880725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB989242A Expired GB555710A (en) | 1942-07-16 | 1942-07-16 | Improvements in electric switches for motor-driven pumps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB555710A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505111A (en) * | 1981-07-29 | 1985-03-19 | Nissan Motor Company, Limited | Hydraulic control system for industrial vehicle |
-
1942
- 1942-07-16 GB GB989242A patent/GB555710A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505111A (en) * | 1981-07-29 | 1985-03-19 | Nissan Motor Company, Limited | Hydraulic control system for industrial vehicle |
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