GB1524026A - Structures which deform substantially with a controlled negative spring rate - Google Patents
Structures which deform substantially with a controlled negative spring rateInfo
- Publication number
- GB1524026A GB1524026A GB3537774A GB3537774A GB1524026A GB 1524026 A GB1524026 A GB 1524026A GB 3537774 A GB3537774 A GB 3537774A GB 3537774 A GB3537774 A GB 3537774A GB 1524026 A GB1524026 A GB 1524026A
- Authority
- GB
- United Kingdom
- Prior art keywords
- platform
- struts
- frame
- ties
- springs
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/04—Cutting-off or removing waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/21—Presses specially adapted for extruding metal
- B21C23/218—Indirect extrusion presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
Abstract
1524026 Counterbalancing apparatus J H ELLINGER 12 Aug 1975 [9 Aug 1974] 35377/74 Heading B8B An apparatus securable to a bath for counterbalancing an invalid carrying platform vertically movable into and out of the bath water, comprises a pair of inclined struts 41, 42 pivotally connected at their lower ends 43, 44 to a frame 10 for rotation about horizontal axes, the top ends of the struts slidably supporting the platform therebetween, and constant on negative rate springs 58 adjustably connected between the frame and the struts through flexible ties 59 to operate in a sense to rotate the struts to raise the platform. With negative rate springs, the lifting counterbalancing force for the platform is reduced as it lowers and moves into the bathwater where buoyancy assists the springs. When constant rate springs are used, the points of connection between the ties 59 and struts 41, 42 are slidable under cam control, towards the strut pivots 43, 44 as the struts pivot downwardly to reduce the spring force applied. The two struts 41, 42 are slidingly pivoted at 53 to a crosshead 39 vertically movable along a guide rail 38 forming part of the frame 10. The latter further comprises parallel front and rear oval section rails 30, 31 at each side thereof, the invalid carrying platform running up and down the front rails 30 through vertically spaced pulley bogies on the platform engaging each rail 30. The upper pulley bogey at each side of the platform engages the rear face of the associated rail 30 whilst the lower bogey engages the front face, a spring loaded plastics slide block being mounted on the platform to react with the rail 30 on the opposite side to each pulley bogey. The platform is vertically movable by rollers 60 at the free ends of the struts 41, 42 slidingly engaging respective forwardly and backwardly facing channels extending across the platform which has a seat portion pivotal into a vertical storage position. The springs 58, which are mounted in back-to-back pairs at each side of the frame 10, are housed in selfaligning casings secured to the outside of the frame intermediate its height, the casings each being associated with structure supporting a horizontal telescopic member 100, 101 pivotally adjustable in a horizontal plane to engage the associated bath rim to support the frame thereon. In another embodiment of Fig. 16 (not shown) the strut rollers engage slots in the sides of the platform and the tie elements pass in frictional engagement around opposite ends of a rotatable tube at the top of the frame, to balance out uneven tensions in the ties. In a further embodiment of Fig. 17 (not shown) the platform is controlled by pairs of rollers on a parallelogram linkage at each side of the platform engaging side slots therein, a tie extending from each roller pivot, over a pulley on a load balancing tube end on to a spring. In the embodiment of Fig. 18 (not shown) the platform is controlled by pairs of parallel links interconnected and pivotally connected to each side of the platform, the links at each side being associated with a tie and spring arrangement. In a final embodiment of Fig. 19 (not shown) the arrangement is similar to that in Fig. 5 except that the struts are held in equal operation by chain and sprocket interconnection between pulleys over which the ties pass with frictional grip.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3537774A GB1524026A (en) | 1975-08-12 | 1975-08-12 | Structures which deform substantially with a controlled negative spring rate |
GB864977A GB1513253A (en) | 1975-08-12 | 1977-03-01 | Indirect extrusion processes and apparatus |
MY8000249A MY8000249A (en) | 1975-08-12 | 1980-12-31 | Indirect extrusion processes and apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3537774A GB1524026A (en) | 1975-08-12 | 1975-08-12 | Structures which deform substantially with a controlled negative spring rate |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1524026A true GB1524026A (en) | 1978-09-06 |
Family
ID=10377059
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3537774A Expired GB1524026A (en) | 1975-08-12 | 1975-08-12 | Structures which deform substantially with a controlled negative spring rate |
GB864977A Expired GB1513253A (en) | 1975-08-12 | 1977-03-01 | Indirect extrusion processes and apparatus |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB864977A Expired GB1513253A (en) | 1975-08-12 | 1977-03-01 | Indirect extrusion processes and apparatus |
Country Status (2)
Country | Link |
---|---|
GB (2) | GB1524026A (en) |
MY (1) | MY8000249A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IE61128B1 (en) * | 1988-08-30 | 1994-10-05 | Precision Steel R & D Limited | A method and apparatus of removing a pip from a machined component |
CN116729900B (en) * | 2023-08-15 | 2023-10-24 | 山西精工天佑煤矿机械制造有限公司 | Scraper conveyor with tail coal cleaning structure |
-
1975
- 1975-08-12 GB GB3537774A patent/GB1524026A/en not_active Expired
-
1977
- 1977-03-01 GB GB864977A patent/GB1513253A/en not_active Expired
-
1980
- 1980-12-31 MY MY8000249A patent/MY8000249A/en unknown
Also Published As
Publication number | Publication date |
---|---|
GB1513253A (en) | 1978-06-07 |
MY8000249A (en) | 1980-12-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |