GB628431A - Improvements in time delay electric switches - Google Patents
Improvements in time delay electric switchesInfo
- Publication number
- GB628431A GB628431A GB2641547A GB2641547A GB628431A GB 628431 A GB628431 A GB 628431A GB 2641547 A GB2641547 A GB 2641547A GB 2641547 A GB2641547 A GB 2641547A GB 628431 A GB628431 A GB 628431A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bellows
- spring
- screw
- pivoted
- dead
- 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)
- Switches Operated By Changes In Physical Conditions (AREA)
- Thermally Actuated Switches (AREA)
- Reciprocating Pumps (AREA)
Abstract
628,431. Press-button retractive switches. PETTER, K. M. Sept. 30, 1947, No. 26415. [Class 38(v)] A retractive snap-action switch has a time-delay imparted by a bellows or the like having an adjustable air-leak 6, the extent of the delay being controlled by an adjustable screw 30. On depression of push-button 21, the bellows 4 is compressed and a bell-crank 18 pivoted at 17 is rotated clockwise, thereby carrying over deadcentre a spring 27a connected between its lower end and a U-shaped operating member 26, pivoted at 27. The member 26 moves clockwise against screw 30 and allows a spring-urged contact to bridge contacts 23. A spring 22 connected to lever 18 tends to extend the bellows at a rate dependent on the setting of the air leak 6, thereby swing- ing the member 26 counter-clockwise, until the dead-centre position is reached, when it snaps over to open contacts 23, 24, the time taken for member 26 to reach the dead-centre position depending on the setting of screw 30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2641547A GB628431A (en) | 1947-09-30 | 1947-09-30 | Improvements in time delay electric switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2641547A GB628431A (en) | 1947-09-30 | 1947-09-30 | Improvements in time delay electric switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB628431A true GB628431A (en) | 1949-08-29 |
Family
ID=10243297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2641547A Expired GB628431A (en) | 1947-09-30 | 1947-09-30 | Improvements in time delay electric switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB628431A (en) |
-
1947
- 1947-09-30 GB GB2641547A patent/GB628431A/en not_active Expired
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