GB935835A - Improvements in fluid pressure-operated electric switches - Google Patents
Improvements in fluid pressure-operated electric switchesInfo
- Publication number
- GB935835A GB935835A GB348260A GB348260A GB935835A GB 935835 A GB935835 A GB 935835A GB 348260 A GB348260 A GB 348260A GB 348260 A GB348260 A GB 348260A GB 935835 A GB935835 A GB 935835A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spring
- diaphragm
- lost motion
- actuator
- loaded
- 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
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
- H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
- H01H35/2614—Means for adjustment of "ON" or "OFF" operating pressure by varying the bias on the pressure sensitive element
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Thermally Actuated Switches (AREA)
Abstract
935,835. Fluid-pressure actuation of switches. BRITISH THERMOSTAT CO. Ltd. Jan. 25, 1961 [Feb. 1, 1960], No. 3482/60. Class 38 (5). A switch is operable by a diaphragm which divides a sealed casing into two chambers, the diaphragm being axially and adjustably loaded by a first spring means being provided for also supplying an additional spring component acting continually on the diaphragm, and for providing lost motion by limiting the displacement of the first spring, whereby the switch operating point is fixed in one direction of operation but is variable in the other. As shown, the diaphragm 1, 6 carries an actuator 7 loaded by a spring 8. The actuator acts on a snap-action switch mechanism 9, 10. The additional spring component is supplied by a leaf-spring 14 acting permanently downwards on the activator 7, the lost motion between the latter and spring 8 being provided by causing the spring to bear on a shoulder 17. The spring 8 has an adjustable upper abutment 25 bearing upon a rocking plate 24 which may be positioned in any one of three positions by appropriate depression of one of three push-buttons. In a modification, Fig. 4 (not shown), a rotary cam plate acts on a spring lever attached to the abutment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB348260A GB935835A (en) | 1960-02-01 | 1960-02-01 | Improvements in fluid pressure-operated electric switches |
| FR851544A FR1279821A (en) | 1960-02-01 | 1961-02-01 | Pressurized fluid-controlled switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB348260A GB935835A (en) | 1960-02-01 | 1960-02-01 | Improvements in fluid pressure-operated electric switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB935835A true GB935835A (en) | 1963-09-04 |
Family
ID=9759155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB348260A Expired GB935835A (en) | 1960-02-01 | 1960-02-01 | Improvements in fluid pressure-operated electric switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB935835A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2287128A (en) * | 1994-03-03 | 1995-09-06 | M & G Tankers & Trailers Ltd | Fluid operated switch |
| GB2300522A (en) * | 1995-05-03 | 1996-11-06 | Amot Controls Ltd | Switching mechanism with adjustable bias |
-
1960
- 1960-02-01 GB GB348260A patent/GB935835A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2287128A (en) * | 1994-03-03 | 1995-09-06 | M & G Tankers & Trailers Ltd | Fluid operated switch |
| GB2300522A (en) * | 1995-05-03 | 1996-11-06 | Amot Controls Ltd | Switching mechanism with adjustable bias |
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