GB550924A - Improvements in or relating to dash-pots - Google Patents
Improvements in or relating to dash-potsInfo
- Publication number
- GB550924A GB550924A GB936341A GB936341A GB550924A GB 550924 A GB550924 A GB 550924A GB 936341 A GB936341 A GB 936341A GB 936341 A GB936341 A GB 936341A GB 550924 A GB550924 A GB 550924A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- valve
- disc
- spring
- action
- 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
- H01H7/00—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
- H01H7/02—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with fluid timing means
- H01H7/03—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with fluid timing means with dash-pots
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
550,924. Dashpots. BROOKHIRST SWITCHGEAR, Ltd., and BARNES, J. H. July 24, 1941, No. 9363. [Class 108 (iii) [Also in Group XXXVII] The action of an electric circuit breaker is restrained by a dashpot in such a way that a port, the size of which can be pre-set, is controlled by a valve in the form of a helical or spiral spring one end of which forms a flap adapted to close the port when a sudden unsustained force is applied to the piston in the operative direction. The opening movement of the circuit breaker moves pistong 11 upwards in its cylinder 10 by polygonal piston rod 12 having a selected one of a number of throttling orifices 14 in the piston in action and controlled by a spring valve 19 which is normally open. This valve consists of a flat curved spring having one end fixed at 20 to the disc 15 and having a flap 21 at its other end co-operating with a hole 16 in the disc. For small sustained overloads the upward movement of the piston is restrained by throttling through the selected orifice 14 in the piston, the valve remaining open ; but for heavy momentary overloads, the valve closes orifice 14 and prevents operation of the cut-out. The disc 15 may be adjusted relatively to the piston to bring any one of the spaced holes 14 in the piston under the flap 21 of the spring valve by raising it to a part 18 of the rod where it can be turned and then lowering it again on to the hexagonal rod, The disc 15 lifts and allows free downward or return movement, additional orifices 23 being provided to assist this action. Upward movement of the valve is limited. Specifications 24392/10, [Class 108 (iii)], 480,805 and 533,040 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB936341A GB550924A (en) | 1941-07-24 | 1941-07-24 | Improvements in or relating to dash-pots |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB936341A GB550924A (en) | 1941-07-24 | 1941-07-24 | Improvements in or relating to dash-pots |
Publications (1)
Publication Number | Publication Date |
---|---|
GB550924A true GB550924A (en) | 1943-02-01 |
Family
ID=9870494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB936341A Expired GB550924A (en) | 1941-07-24 | 1941-07-24 | Improvements in or relating to dash-pots |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB550924A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2666827A (en) * | 1951-01-17 | 1954-01-19 | Mcgraw Electric Co | Circuit interrupter |
DE2653077A1 (en) * | 1975-11-25 | 1977-06-02 | Merlin Gerin | Current limiting switch - has movable contact connected to actuator by one way gears fitted with shock absorber |
FR2417684A1 (en) * | 1978-02-18 | 1979-09-14 | Honda Motor Co Ltd | DAMPING FORCE CONTROL DEVICE IN A HYDRAULIC SHOCK ABSORBER |
US4342884A (en) * | 1978-06-14 | 1982-08-03 | Itsuki Ban | Piston unit |
-
1941
- 1941-07-24 GB GB936341A patent/GB550924A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2666827A (en) * | 1951-01-17 | 1954-01-19 | Mcgraw Electric Co | Circuit interrupter |
DE2653077A1 (en) * | 1975-11-25 | 1977-06-02 | Merlin Gerin | Current limiting switch - has movable contact connected to actuator by one way gears fitted with shock absorber |
FR2417684A1 (en) * | 1978-02-18 | 1979-09-14 | Honda Motor Co Ltd | DAMPING FORCE CONTROL DEVICE IN A HYDRAULIC SHOCK ABSORBER |
US4342884A (en) * | 1978-06-14 | 1982-08-03 | Itsuki Ban | Piston unit |
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