Patent GB-191216826-A (GB)
Title: Improvements in Hydraulic Briquetting Machinery.
Inventor: DENISON GEORGE HENRY
IPC: B30B11/04
Filed: 1912-07-19
Granted: 1913-07-21
Abstract: 16,826. Denison, G. H., and Korte, C. July 19. Presses, cylinder and piston; governing and controlling; w o r k i n g valves.-The apparatus described in Specification 7365/11 is modified so that the compressing- tool may be made first to compress and then to discharge the c o mpressed briquette from the mould. Water from a pump is delivered through the pipe 14, Fig. 1, to the retracting-cylinder 8, Fig. 2, to the valves 15, 19, and to the ram 26, Fig. 3, so that these parts are continually under pressure. From the governing - valve 15, water passes through the pipe 16 to the main cylinder 6, and from the levercontrolled pressure - adjusting valve 17 on the pipe 14, through the pipes 18<a>, 18<b>, 18<c>, to the valve 20, and to the lower part of valve 19. The valve 21 is spring- controlled so as to be normally open, while the valves 20, 22 are similar but are normally in the closed position. The valve 15, shown in section in Fig. 5<a>, has inlet and outlet openings 15<b>, 16<a>. Pressure water acting on the larger piston 15d normally raises the block k<1> into contact with the sleeve b, and opens the valve 15<e>, thus causing the main ram 7 to descend in spite of the upward force on the smaller retracting-ram 8, and to compress the briquette in the mould 2 until the pressure in the pipe system is sufficient to raise the governing-valve 17, Fig. 5<a>, and thus admit water through pipes 18<d>, 18<a> to the chamber 15<a>, Figs. 1 and 5<a>, causing the piston 15<f> to be depressed and the valve 15<e> to be closed. The pressure water filling the main ram chamber is now exhausted through the passages 16<a>, 15<k>, and pipe 24, as the ram 7 is retracted by the retracting-ram 8. At the commencement of the upward motion of ram 7, the valve 17 closes. When the valve 17 is opened at the end of the forcing-stroke of the ram, water passes through the valve 19 (somewhat similar to 15) and pipe 25, Figs. 1 and 3, to the cylinder 26<b>, Fig. 3, thus withdrawing the block 11. The piston 26<a> strikes the tappet 27, which, by an arrangement of link-work, opens the valve 20 by means of the plug 21<b> and thus allows the water in the space 15<a>, Fig. 5<a>, and pipes 18<a>, 18<b> to escape to the outlet pipe 24 and permit the pressure water to raise the piston 15<d> again. This operation again admits pressure water to the main ram as before, causing it to descend and discharge the briquette. At the end of its downward stroke, the ram strikes the rod 29, Figs. 1 and 2, and thus closes valve 21, at the same time striking the rod 30 and opening the valve 22. The increase of pressure in the system opens the valve 17 and thus reverses the action of the valve 15 as above described. The opening of the valve 22 releases water from the lower chamber of the valve 19, thus permitting the upper valve to close and release the pressure water in pipe 25. This liberates the piston 26<a>, so that the continuous supply of pressure water to the ram 26 returns the block 11 to its position below the mould and releases the tappet 27, thus closing the valve 20. Since the valve 21 is still closed, the pressure water in the pipe 14<a> acts on the retracting-ram 8 and withdraws it until it reaches its highest position, whereupon a projection 33, Fig. 1, operates the lever 33<a> and opens the valve 20, thus liberating the imprisoned water in the valve 15<a> and allowing the valve to assume its first normal position. The cycle of operations is then repeated.