US314911A - boomee - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. G B; BOOMER.

BOX FUR PRE SSES. No. 314,911.. Patented Mar. 31, 1885.

' (No Model.) 2 Sheets-Sheet 2-.

i G. B. BOOMER.

BOX FOR PRESSES.

No. 314,911. Patented Mar. 31, 1885.

UNITED STATES PATENT (OFFICE.

GEORGE B. BOOMER, OF MOUNT PLEASANT, NEWV YORK.

BOX FOR PRESSES.

SPECIFICATION forming part of Letters Patent No. 314,911, dated March 31, 1885.

(No model.)

TOaZZ whom it may concern Be it known that I, GEORGE B. BOOMER, residing in the town of Mount Pleasant, in the county of Westchester and State of New York, have invented certain new and useful Improvements in Boxes for Presses, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making a part of this specification. I

My invention relates more particularly to the presses used for extracting oil from oleaginous substances, and to the manner of constructing the plates used on the bottom'of the boxes and on the face of the plungers, and which form the pressing-surface against which the material is pressed, and of arranging the frames that secure the cloth over the same.

In the accompanying drawings, in which like letters indicate like parts, Figure 1 is a view of the pressing-surface within the box, showing the frame and cloth in position, a part of the latter being removed to show the arrange ment with the plates P beneath. Fig. 2 is a view of the inner pressing-surface of the box when adapted for two plates, showing one plate in position and on the opposite side the recess in which the plate is placed. Fig. 3 is a view of the under side of one of the plates. Fig. 4: is a sectional view through one of the plates. Fig. 5 is a view of the frame shown in position in Fig. 1. Fig. 6 is a view of the pressing-surface of the box when adapted for one plate, showing the frame and cloth in position. Fig. 7 is a sectional view through Fig. 6.

My improvements are designed to be used on any variety of presses, whether the boxes are arranged horizontally or vertically and whatever the power employed, and may be used on both the pressing-surfaces of the box and of the plunger or follower, or on only one,- as desired.

In the usual construction of boxes where plates or their equivalents have been used on the inner face of the box to form the pressingsurfacc, these plates have been made to cover 'the entire face of the box, and when frames have been employed to hold the cloth in place such frames necessarily rest upon and are attached to the top of the plate or its equivalent. In this form of construction much difficulty is encountered in making the frame heavy and thick enough to have the required strength. and yet not have it interfere with the pressing-surface of the box. If made thin enough to lie close against the plate and not interfere when the two pressing-surfaces come together, the frame. is not strong enough to hold the cloth firmly inits place, while if made thick and heavy enough to accomplish that object, it projects too far beyond the face of the plate and seriously interfere with the action of the press.

In my improved construction, by which I overcome this difficulty, I make the plate smaller or of less extent than the face of the boxand form the frame so as to surround the plate or its equivalent on all sides, by which method I am enabled to construct the frame thick and strong-as thick as the plate, if desired-and yet have the top edge of the frame project but slightly above the upper surface of the plate, or be even and 011 the same plane with it, as will be fully understood from the drawings. The plate may be fastened to the face of the box in the usual manner; but I prefer the method shown in the drawings, where, as will be seen, the plate or plates, in

.case there aretwo, rest in shallow recesses formed in the face of the box. These recesses, as shown in Fig. 2, are surrounded by the sides B B, and where two plates are used are separated by a middle partition, B, and are made of such a depth that when the plates are placed in the same they will project above or beyond the sidesB B and partition B, as is seen in Fig. 2 of the drawings. in the recesses in any convenient manner; but preferably by a screw at each end, so as to be easily removable. Over the plates thus secured, and the entire face of the box, is extended the filter-cloth D, Fig. 1, and is held in place by the frame F, (shown detached in Fig. 5,) which closely surrounds the plates and rests on the sides B B and middle partition, 13, shown in Fig. 1. This frame may be just thick enough to correspond with the height of the plates above the'sides B B, so that when in position the top of the frame will be even with the surface of the plates, and the frame The plates may be secured and plates will present a smooth uniform pressing-surface; or the outer edge and the middle of the central division of the frame may be the thickest, and the sides may be beveled or slope toward the surface of the plates, as is shown in the drawings. This is the preferable form of construction, as when thus made the material as it is pressed is forced away from the sides of the box toward the plates, and the cake after pressure is thinnest at the edge and may easily be dislodged from the pressing-surface; and, moreover, when the central division of the frames is made thickest in the middle with beveled sides, as is shown, the cake after pressure is separated in two parts in the center and may be more easily dislodged and removed from the box. The frame is fastened to the surface of the box by means of screws, as is seen in Fig. 1, or may be secured in any manner found convenient, so as to be readily removable when it is desired to clean or renew the cloth. As the frame closely surrounds the plates, it stretches the cloth tightly over the surface of the latter and holds it firm and in place during the pressing and when the cake is removed after the material is pressed.

My improved frame, constructed so as to surround the plate, may be used equally well when the plate is attached directly on the face of the box, instead of resting in a recess, as described and shown above. In-all cases it is only necessary to arrange the thickness of the frame to correspond with that of the plate. The frame, moreover, maybe so constructed as to secure or hold the plates in position without other fastening, as by a lip or projection.

My improved method of constructing the frame may be used with any plate where the cloth is held on by a frame; but I prefer the plate illustrated in the drawings.

As I propose to construct it, the plate is formed of iron or steel, and for ordinary use about one-fourth of an inch thick, but may vary in thickness and material, as is found desirable. On the upper side of the plate narrow grooves are formed, extending across the face of the plate from edge to edge. These grooves,which are most conveniently made by a milling-machine,increasein depth from both edges toward the central line of the plate until they pass entirely through the latter, as is shown in Fig. 3, which shows the back or under side of one of the plates. In the middle or central line of the plate, therefore, the groove extends through the plate from the up per to the lower side, and the lower line of the groove is V-shaped, as will be understood fromthe cross-section of one of the grooves shown in Fig. 4:. The inclination of the bottom or lower line of the grooves from the edge and the length of the slot or opening which passes through the plates is determined by circumstances and the use for which the press is adapted. The greater the length of the slot or perforation, the freer the oil or other liquid will flow through the same, and the slot may be as long as is consistent with the strength of the plate.

In the face of the boxAAa groove or channel, C, Fig. 2, is formed lengthwise of the box, directly beneath the line of openings 1 in the plate for collecting the oil or other materials after the same has passed through the plate. By thus constructing the plate with grooves across the face and passing through the same at one part of the plate, as shown, the plate is rendered much stronger than inthe ordinary mode of construction, as the portions of the plates between the grooves are left intact and of the full thickness where they cross the channel or leader on the face of the platebed, and thus cannot be affected by the pressure brought to bear on them when in use, and the grooves are made on both sides of the plate at one and the same operation, and all trouble of making a different set of grooves on the under side of the plate is avoided; and, moreover, on account of the nature and extent of the opening through the plate, the liquid passes readily and quickly through the same, and its flow is not checked or interfered with. Plates thus grooved and perforated according to my improvement may be used in any construction of box and on any form of press, whether horizontal or vertical, and may be employed whenever plates or their equivalents are used 5 and it is not necessary that the plates should be of the form and construction shown in the drawings, as they may be round or of any desired shape and adapted to any style of press.

\Vhile I prefer the construction and combination of the plates and frame above described, the two plates may be used by themselves without the cloth and frame, being held in place in the recess in any convenient manner. In that case the sides B B of the recess and the middle partition, B, should be high enough to be even with the top surface of the plates, and it is evident that my combination of parts may be used with plates grooved in any other way than that described. A single plate may also be used, with or without the frame, to cover the face of the box or plunger. By my improved construction of plate, therefore, I obtain a stronger and better plate than those commonly used, and by making the plates so small that they lie within the sides of the frame any strength required can be given to the frame, and without raising its inner edge above the level of the plate more than is desired. The cloth is also easily and tightly stretched over the surface of the plates and can be fastened more securely than is possible by the methods now in use.

WVhat I claim is- 1. In oil-presses, a frame for holding the cloth adapted to surround the plate or pressing-surface, as and for the purposes set forth. 2. In oil-presses, the combination, with a perforated plate or plates, of the frame F for holding the cloth adapted to surround the plate, as and for the purposes set forth.

3. In oil-presses, the combination, with a 5 perforated plate or plates and recessed box or plunger to receive the same. of the frame F for holding the cloth adapted to surround the plate, as and for the purposes set forth.

4. In oil-presses, a plate having grooves 10 across the surface increasing in depth from the edges and passing through the plate at or near the center, substantially as described, and for the purpose set forth.

GEO. B. BOOMER.

Witnesses:

F. L. GROSS, JOHN E. LAW.

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