GB411387A - Improvements in and relating to time-lag devices of the dash-pot and plunger type - Google Patents
Improvements in and relating to time-lag devices of the dash-pot and plunger typeInfo
- Publication number
- GB411387A GB411387A GB3471933A GB3471933A GB411387A GB 411387 A GB411387 A GB 411387A GB 3471933 A GB3471933 A GB 3471933A GB 3471933 A GB3471933 A GB 3471933A GB 411387 A GB411387 A GB 411387A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arm
- switch
- spring
- pin
- plunger
- 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
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F1/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
411,387. Retractive switches; snapaction switches ; retarding action of switches; hydraulic springs. HAMILTON, W., Woodlands, Wadhurst, Sussex. Dec. 9, 1933, No. 34719. [Class 38 (v).] A quick-action retractive switch with a dashpot time delay device, comprises a switch arm 8 pivoted at 9 and provided with a member 10 for bridging a pair of contacts 11. The arm 8 is connected by a spring 12, which can act both as a tension or a compression spring, to an arm 1 of a bell crank lever pivoted at 3, the other arm 2 of which bears a pin 6, adapted to engage a ramp 7 on the switch arm 8. The cone 1 is shown in an intermediate position in which the spring 12 is not under tension. If the arm 1 is turned in a clockwise direction, the spring 12 is tensioned but the switch arm 8 is restrained until the pin 6 passes off the end of the ramp 7 to allow the switch arm to open rapidly. From this position, if the arm 1 is turned anti-clockwise the pin 6 rests under the ramp 7 and prevents the arm 8 from moving down under the compression of the spring 12 until the pin 6 passes off the right hand end of the ramp 7 and the switch closes rapidly. To enable the switch to be closed for certain intervals, a dashpot 13 is provided with a plunger 14 moving in a viscous liquid such as glycerine, the hollow plunger rod 15 being slotted at its upper end to receive the arm 1 which is connected to the plunger 14 by a compression spring 19. A powerful spring 20 is fixed on a stud 21 and has one arm 22 held by a pin 24. The other arm 23 engages a pawl 16 pivoted at 17 to the arm 1 to bias it and the arm 1 in a clockwise direction. When the handle 5 is sharply depressed the switch is closed as described, and the arm 1 is held by the engagement of the hooked end 25A of the pawl 16 under a fixed abutment 28. The plunger 14 then slowly moves down under the action of the spring 19 until a pin 18 or the forked rod 15 trips the pawl 16. The spring 20 then moves the arm 1 and the plunger slowly upwards to open the switch as described. In a modification the cone 2 is loosely coupled to the arm 1 so that the switch can be opened again quickly independently of the dashpot. Specification 395,801 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3471933A GB411387A (en) | 1933-12-09 | 1933-12-09 | Improvements in and relating to time-lag devices of the dash-pot and plunger type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3471933A GB411387A (en) | 1933-12-09 | 1933-12-09 | Improvements in and relating to time-lag devices of the dash-pot and plunger type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB411387A true GB411387A (en) | 1934-06-07 |
Family
ID=10369127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3471933A Expired GB411387A (en) | 1933-12-09 | 1933-12-09 | Improvements in and relating to time-lag devices of the dash-pot and plunger type |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB411387A (en) |
-
1933
- 1933-12-09 GB GB3471933A patent/GB411387A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2047815A (en) | Circuit breaker | |
| GB719409A (en) | Automatic electrical circuit-breakers | |
| GB411387A (en) | Improvements in and relating to time-lag devices of the dash-pot and plunger type | |
| GB502354A (en) | Automatic installation switch with toggle-lever switch mechanism | |
| US2558908A (en) | Circuit breaker switch | |
| US2212732A (en) | Circuit breaker | |
| US1701440A (en) | Switch-latching mechanism | |
| US1930435A (en) | Mercury switch | |
| US2285770A (en) | Circuit breaker | |
| GB464205A (en) | Improvements in and relating to thermally controlled electrical switches or circuit breakers | |
| US1900289A (en) | Lost motion mechanical linkage | |
| GB206944A (en) | Improvements in electric switches | |
| GB513143A (en) | Improvements in and connected with trip-operated mechanism for electric switches | |
| GB221478A (en) | Improvements in solenoid-operating-mechanisms | |
| GB730978A (en) | Improvements in automatic electric circuit breakers | |
| GB159478A (en) | Improvements in and relating to automatic electric cut-outs | |
| GB272499A (en) | Improvements in automatic electric quick break switches | |
| USRE18031E (en) | Relay for high-tension fuses | |
| US1758870A (en) | Quick-action electric switch | |
| GB398387A (en) | Improvements in clock-operated electric switches | |
| US2020836A (en) | Switch actuating mechanism | |
| GB243054A (en) | An improved mechanically connected fluid tap and electrical switch | |
| US2032454A (en) | Coin collector | |
| GB686516A (en) | An improvement in automatic electric circuit breakers with time lag thermal release | |
| GB347959A (en) | Improvements in and relating to automatic circuit-breakers for house wiring |