USRE10429E - Block-presser for wood-paper-pulp machines - Google Patents

Description

N. H. BROKAW. Y BLOCK PRBSSBR 'POR WOOD PAPER P ULP MACHINES. )Na-10,429.

Reissued Deo. 25, 1883.

Illini tfllllllllll f. f m I f INVENTOR: 72. v/fwmm ATTORNEYS.

NA PEYERS. Mummia'. wuhmpm. D C.

I Y UNITED lSTATES PATENT OFFICE.

NORMAN H. BBOKAAV, OF MARINETTE, VISCONSIN.

BLOCK-PRESSER FOR WOOD-PAPER-PULP MACHINES.

SPECIFICATION forming part of ReissuedfLetters Patent No. 10,429, dated December 25, 1823.

(niginal No. 271,405), dated January 3U, 1983. Application for reissue filed December l, lfliA l T0 all whom t 17u01/ concern:

Be it known that I, NORMAN H. Bnoiinw, of Marinette, in the county of Marinette and State of Visconsin, have invented a new and Improved Blockn Presser for "Wood-Pap er-l? nl p Machines, of which the following is a full, clear, and exact description. The object of my invention is to provide a new and improved device for pressing the blocks of wood upon the grinding or abrading surface of a paper-pulp machine. Y

The invention consists in a head-block attached to the lower end of a piston-rod attached to a piston in a cylinder havingits ends connected at opposite sides by tubes containing three-way cocks provided with arms connected by suitable arms with levers pivoted on the top of the cylinder, and having their outer ends weighted, and having their inner ends adapted to be held by alatch connected. 'by a suitable device with the head-block, whereby, when compressed air, steam, or aliquid is admitted in the cylinder, the head-block will be moved downward and will press the block of wood on the grinding-surface, and when this head-block has descended suficiently thelatch is opened, the inner ends ofthe levers are released, the cocks are reversed, and the piston and head-block will be raised.

Reference is to be had to the accompanying drawings, forming part of this specification, in which a longitudinal sectional elevation of my improved block-presser is shown.

The cylinder A, closed at the top and bottom, contains a piston, B, to which a rod, G, is attached, projecting from the lower end of the piston, to the lower end of which pistonrod an ordinary headblock, D, is attached. The ends of the cylinder A are connected at opposite sides by tubes E E', each provided in the middle with a three-way cock, F or F, at which cocks outlet and supply pipes G G are connected with the tubes E E', respectively. To the cocks F F arms H H are attached, and the outer endsof these arms are connected by rods I l with the outer ends of levers J J, pivoted on the top of the cylinder, which levers have weights K K mounted on the outer ends. The inner ends of the levers J J are adapted to meet and to pass under a latch, L, on the top of the cylinder, which latch is connected bya chain or cord, M, with the headblock D. The block of wood N is held between the grinder O and the head-block D.

The operation is as follows: If the piston B is raised, as shown, the cock F will be open and the cock F will be closed-that is, the,A

water can only enter the cylinder at the upper end of the tube E and only leave the cylinder at the lower end of thetnbe E'. The outer ends of the levers J J will be raised and the inner ends will be lowered and held under the latch L. The water forces the piston B downward and presses the block of wood N upon the grinding-surface. Then the head-block has descended as much as desired-that is, when the entire block has been ground to fiberthe chain M, which is so adjusted that it will then be drawn taut, acts on the latch L and releases the inner ends of the levers J J. The weights K K on these levers draw the outer ends of these levers downward and operate the cocks, whereby the cock F will be opened and the cock F will be closed, so that the water can only enter at the lower end of the tube E and must pass off at the upper end 0f the tube E-that is, the piston will be raised. Then the inner ends of the levers J J are lowered and locked by means of the latch L, so that the water can enter, as described above, and the piston will be lowered again.

In placerof water, oil, alcohol, or any other liquid, or gases, vapors, compressed air, or steam, may be used to operate the blockpresser.

rI he mechanism is very simple, is reversed automatically, and always exerts a uniform pressure on the block.

A projection, B', is provided both on the upper and lower surfaces of the piston, and these projections prevent the piston from being raised or lowered sufficiently to close the ends of the tubes E E.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. Ablocl -presser for paperpulp mills, consisting of a hydraulic press having the upper and lower ends of its cylinder connected with a pipe or pipes which areprovided with cocks for admitting the liquid into the upper or' lower ends ot the cylinder, substantially as herein shown and described, and for the pur; pose set forth.

IOD

2. A block-presser for pulp-mills, consisting of a hydraulic press the cylinder of whichhas its upper and lower ends connected with a pipe or pipes which are provided with cocks for admitting the liquid into either en'd of the cylinders, which cocks are provided with devices for automatically adjusting them when the piston arrives at the end of its downward stroke, substantially as herein shown and described, and for the purpose set forth.

3. A block-presser for pulp-mills, consisting of a hydraulic press provided with means for conducting the liquid into the upper end of the cylinder to press the piston downward, and with means for admitting the liquid into the lower end of the cylinder for the purpose of forcing the piston upward after it has cornpleted its downward stroke, substantially as herein shown and described, and for the purpose set forth.

-head-block D, and a device for connecting the piston-rod or head-block with the latch L, substantiallyr as herein shown and described, and for the purpose set forth.

NORMAN H. BROK AW.

Vitnesses:

WM. S. BAKER, W. L. EDMoNDs.

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