GB641514A - Improvements in electric limit switches in connection with float apparatus - Google Patents
Improvements in electric limit switches in connection with float apparatusInfo
- Publication number
- GB641514A GB641514A GB796848A GB796848A GB641514A GB 641514 A GB641514 A GB 641514A GB 796848 A GB796848 A GB 796848A GB 796848 A GB796848 A GB 796848A GB 641514 A GB641514 A GB 641514A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- connection
- spindle
- spring
- arms
- 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
- H01H35/18—Switches operated by change of liquid level or of liquid density, e.g. float switch
Landscapes
- Level Indicators Using A Float (AREA)
Abstract
641,514. Actuation of switches. STOKOE, C. L., and MONITOR PATENT SAFETY DEVICES, Ltd. March 17, 1948, No. 7968. [Class 38(v)] Limit switches f, g having resilientlymounted contacts comprise a spindle m having arms H, L actuated by a guide plate c on a rod b attached to a float a in a liquid tank, the level of the liquid therein being indicated by a pointer j on a graduated plate d. Each switch has an insulating tappet o which is mounted on the spindle m and engages a weight member i to break the connection between the switch contacts a, b, and make the connection between the contacts c, d. The switch arms H, L can pivot in one direction, against the action of a spring y so that the plate c, Fig. 3, will move the arms out of its path if the switch is incorrectly set and are fixed in the opposite direction against movement. Snap-operation is provided by a spring q which crosses the axis of the spindle to cause a lever t thereon, attached at one end to the spring, to move rapidly between two stops u, v. The position of the switches can be varied by mounting them in slots in a bracket and they may operate either an indicating lamp and alarm system or a control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB796848A GB641514A (en) | 1948-03-17 | 1948-03-17 | Improvements in electric limit switches in connection with float apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB796848A GB641514A (en) | 1948-03-17 | 1948-03-17 | Improvements in electric limit switches in connection with float apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB641514A true GB641514A (en) | 1950-08-16 |
Family
ID=9843235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB796848A Expired GB641514A (en) | 1948-03-17 | 1948-03-17 | Improvements in electric limit switches in connection with float apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB641514A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3118304A (en) * | 1964-01-21 | Brake system | ||
| GB2243244A (en) * | 1990-04-19 | 1991-10-23 | Leslie Lilley | Liquid level sensor |
-
1948
- 1948-03-17 GB GB796848A patent/GB641514A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3118304A (en) * | 1964-01-21 | Brake system | ||
| GB2243244A (en) * | 1990-04-19 | 1991-10-23 | Leslie Lilley | Liquid level sensor |
| GB2243244B (en) * | 1990-04-19 | 1994-11-16 | Leslie Lilley | Sensors |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1140094A (en) | A float switch | |
| GB1172127A (en) | Float-Controlled Switch Devices | |
| GB1087135A (en) | Improvements in or relating to electric snap-action switch devices | |
| GB641514A (en) | Improvements in electric limit switches in connection with float apparatus | |
| GB1104802A (en) | Indicating and/or controlling device for use in pressure fluid installations | |
| GB1155995A (en) | A Control Device for Providing a Signal Responsive to a Variation in a Liquid Level. | |
| US1986695A (en) | Electrical governor | |
| GB618226A (en) | Improvements in and relating to electric snap-action switches | |
| GB1096515A (en) | Snap-action electric switch | |
| GB1301630A (en) | ||
| GB658165A (en) | Improvements in or relating to electro-magnetically operated switches | |
| GB905226A (en) | An improved electrical liquid-level signalling and/or control device | |
| GB601361A (en) | Improvements in or relating to snap action mechanisms for electric switches, switchgear and the like | |
| GB577447A (en) | Improvements in liquid-level indicating devices | |
| GB1010842A (en) | Improvements relating to switch-operating devices | |
| GB878462A (en) | Improvements in and relating to electrical measuring instruments | |
| GB724125A (en) | Improvements in or relating to float-operated electric switches | |
| GB782521A (en) | Improvements in and relating to electric switches and operating mechanisms therefor | |
| GB1125471A (en) | Switches comprising a micro-switch and a non-linear biassing device | |
| GB814842A (en) | Improvements in fluid-flow controlled electric switches | |
| GB705721A (en) | Improvements in or relating to liquid flow control systems | |
| GB844853A (en) | Improvements relating to protective relays for oil-filled apparatus | |
| GB684444A (en) | Improvements in or relating to a centrifugally-actuated snap-action device | |
| GB820682A (en) | Thermally-operated snap-action electric switch | |
| GB845382A (en) | Electric switch interposed in a mechanical linkage |