GB263298A - Improvements relating to time lag devices of the dash pot type - Google Patents
Improvements relating to time lag devices of the dash pot typeInfo
- Publication number
- GB263298A GB263298A GB3207425A GB3207425A GB263298A GB 263298 A GB263298 A GB 263298A GB 3207425 A GB3207425 A GB 3207425A GB 3207425 A GB3207425 A GB 3207425A GB 263298 A GB263298 A GB 263298A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rod
- piston
- pistons
- dashpot
- devices
- 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
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
- H01H71/443—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay with dash-pot
Landscapes
- Circuit Breakers (AREA)
Abstract
263,298. Ellison, G. Dec. 18, 1925. Automatic c i r c u i t - breakers; retarding devices.-Dashpots used in connection with time-lag devices in electric circuit breakers are constructed with a yielding connection between the piston and its rod and with means whereby relative movement between the two provides a free passage between both sides of the piston so that the dashpot ceases to function as such under the action of abnormal forces. The pistons b, c are slidable on the piston rod d between limits determined by the collars h, i, a shoulder on the piston rod, and the helical springs g. e. The outer piston b is slightly conical and engages a similar conical part of the casing a, while the two pistons are formed with interfitting conical surfaces. During normal working as a dashpot, the pistons remain in the relative positions shown, but in the event of an excessively rapid upward movement of the piston rod, the upper piston b uncovers the port j which communicates with the hollow end part of the rod and allows free flow of liquid from above to below the pistons. The port j and hollow rod may be replaced by a flat on the rod. Specification 218,137 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3207425A GB263298A (en) | 1925-12-18 | 1925-12-18 | Improvements relating to time lag devices of the dash pot type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3207425A GB263298A (en) | 1925-12-18 | 1925-12-18 | Improvements relating to time lag devices of the dash pot type |
Publications (1)
Publication Number | Publication Date |
---|---|
GB263298A true GB263298A (en) | 1926-12-30 |
Family
ID=10332786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3207425A Expired GB263298A (en) | 1925-12-18 | 1925-12-18 | Improvements relating to time lag devices of the dash pot type |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB263298A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2936977A (en) * | 1955-08-04 | 1960-05-17 | All American Eng Co | Means for arresting aircraft |
US3163261A (en) * | 1962-10-15 | 1964-12-29 | Teletype Corp | Carriage decelerating mechanism for telegraph page printers |
-
1925
- 1925-12-18 GB GB3207425A patent/GB263298A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2936977A (en) * | 1955-08-04 | 1960-05-17 | All American Eng Co | Means for arresting aircraft |
US3163261A (en) * | 1962-10-15 | 1964-12-29 | Teletype Corp | Carriage decelerating mechanism for telegraph page printers |
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