GB424591A - Improvements in presses and pressing mechanism - Google Patents
Improvements in presses and pressing mechanismInfo
- Publication number
- GB424591A GB424591A GB2425033A GB2425033A GB424591A GB 424591 A GB424591 A GB 424591A GB 2425033 A GB2425033 A GB 2425033A GB 2425033 A GB2425033 A GB 2425033A GB 424591 A GB424591 A GB 424591A
- Authority
- GB
- United Kingdom
- Prior art keywords
- press
- ram
- valve
- piston
- lever
- 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
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/02—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by lever mechanism
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
Abstract
424,591. Presses. MASSEY, Ltd., B. & S., and MASSEY, H. F., Steam Hammer Works, William Street, Openshaw, Manchester. Sept. 1, 1933, No. 24250. [Class 69 (ii)] [See also Group V] A hydraulic or mechanical press has two toggle arms c, d, Fig, 1, having their adjacent ends pivoted to a lever e and their other ends pivoted to a stationary member f and the press ram a respectively ; the free end of the lever e may be raised and lowered by a hydraulic piston, a screw, crank or cam, and the arrangement is such that the first part of the lever movement for the operative stroke brings the toggle arms approximately into line causing a quick movement of the press ram, while the last part causes a slow, powerful movement at practically constant pressure, one toggle arm serving as a fulcrum. Means may be provided for adjusting the maximum pressure, and for holding the ram in its pressing position. In a hydraulically-actuated press, a cylinder n is supplied from a pump r<2> under the control of a valve q<1>, q<2>, shown in full lines in the position for lifting the ram a. When the piston m passes a port s, the pressure supply is byepassed, and the rest of the upstroke is effected by a weight g. When the valve q<1>, q<2> is moved into the dotted line position, the piston m and ram a are moved down, the valve being retained in position by a member u engaging under a collar q<4>, until tripped by a tappet w or pressure-actuated plunger, when a spring v or a weight moves the valve into the upstroke position. A crosshead j moves in a guide k, which in a modification, has its lower portion formed as an arc of a circle, a connecting rod then being employed. The maximum pressure is determined by an adjustable valve x. If desired, one cylinder may actuate two sets of levers e and toggle arms connected to the ram near its opposite ends. In a further form of hydraulic press, the valve q<1>, q<2> is prevented from return to its upstroke position by a member 10, Fig. 10, the piston m being then hydraulically locked in its lowest position, the supply liquid being byepassed through a hole in a piston q<5>, and leakage being compensated by a small pump 11. Alternatively, the ram may be held down by a catch moving in above the crosshead j, and removed when desired by hydraulic means. A multiple camactuated press comprises a rotating body 15, Fig. 11, carrying a number of press units; in each unit, the lever e is connected to a member 26 supported by a pivoted arm 23 and having a spring-pressed roller 25 engaging the edge of a fixed cam 14 shaped to effect the opening and closing operations of the press and hold it closed for a period.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2425033A GB424591A (en) | 1933-09-01 | 1933-09-01 | Improvements in presses and pressing mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2425033A GB424591A (en) | 1933-09-01 | 1933-09-01 | Improvements in presses and pressing mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
GB424591A true GB424591A (en) | 1935-02-25 |
Family
ID=10208786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2425033A Expired GB424591A (en) | 1933-09-01 | 1933-09-01 | Improvements in presses and pressing mechanism |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB424591A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2131013A1 (en) * | 1970-06-24 | 1971-12-30 | Gulf & Western Ind Prod Co | Press, in particular drawing press |
US11273613B2 (en) * | 2008-06-23 | 2022-03-15 | Compaction Technologies, Inc. | Trash compactor |
-
1933
- 1933-09-01 GB GB2425033A patent/GB424591A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2131013A1 (en) * | 1970-06-24 | 1971-12-30 | Gulf & Western Ind Prod Co | Press, in particular drawing press |
US11273613B2 (en) * | 2008-06-23 | 2022-03-15 | Compaction Technologies, Inc. | Trash compactor |
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