US 1999213 A
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Description (OCR text may contain errors)
April 30, 1935. w. T. SHALER 1,999,213
SIEVE'SHAKER Filed Dec 2, 1953 2 Sheets-Sheet 1 amen-47o;
W. T. SHALER SIEVE SHAKER pril 30, 1935.
Filed Dec. 2, 1933 2 Sheets-Sheet 2 AWN Ewuanboz ZSka/Zer UNITED STATES.
PATENT OFFICE smvn smmnn William T. Shaler, Silver Creek, N. Y. Application December 2, 1933, Serial No. 700,738
'lhe invention'relates to shakers for sieves and the like, of the general type in which off-center weights are driven to produce the required shaking impulses. While shakers of this type'are quite common, difficulties have heretofore been experienced in producing structures which will not have a severe tendency to throw parts out of their true intended relation, resulting in excessive friction, wear and noise, and tending to cause deviation in the directions in which the impulses are to be transmitted to the sieve or the like.
It is the aim of my invention to overcome such mmculties as those above discussed, and to proride a simple, inexpensive, eflicient and durable shaken.
with the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, description being accompllshed by reference to the accompanying drawmgs. 1 7
Hg. 1 is an end elevation of a sieve shaker constructed in accordance with the invention.
Fig. 2 is a top plan view.
Fig. 3 is a vertical sectional view on line 3-3 of Figs. 1 and 2- A preferred structure has been shown and will he specifically described, with the understanding however, that within the scope of the invention as claimed, variations may be made.
Two semi-cylindrical casing sections- 5 and 5' are provided, said casing sections having their open sides disposed at a common plane in which the axes of said sections lie, said axes being laterally offset from; each other in said plane and being in parallel relation. The casing sections 5 and 5' are disposed in slightly spaced end-to-end relation, m d their inner end walls 6 and 6' are integrally joined to each'other by means of a substantially semi-circular wall 'I which not only rigidly connects the central portions of the end walls Sand 8', but form's half of a gear casing,
hereinafter described. The closed peripheral portions of the casing sections 5 and 5' are rigidly tied together to prevent any relative movement or vibration, and in the present showing, said outer end walls H and II' of the'casing sections: are preferably thickened outwardly as at l2 andi2, and provided with reinforcing webs l3 and i3, said thickened portions and webs being integral with the laterally projecting feet 8 and 8'.
me inner side walls and 8' are provided with integral bearing seats I l and I4 mspcctivelm-and similam'seats l5 and I! are provided on the outer end walls and II' respectively. Preferably the central portions of the end walls 6 and 6, carrying the seats It and M and joined to the semi-circular wall I, are inwardly offset to some extent from the remainders of said end walls, giving more space within the above mentioned gear casing, half of which is formedby said wall 1 In the present showing, two intermeshed gears 1i and I6 are received in this casing, said gears being integral with or otherwise fixedly mounted on the inner ends of two shafts I! and I1. These shafts are mounted at their inner ends in annular ball bearings l8 and I8 which are engaged for half of their diameters, with the seats II and It. The
outer ends of the shafts are supported by bearing sides of the end walls II and II respectively,
and said assemblies also include guard plates 22 and 22', said guard plates and flanges being secured to the end walls I l and l I by screws or the like 23 and 23'. Both the inner and outer bearings for each shaft are snugly fitted to saidvshaft to prevent any movement of the latter with respect to the former, and the outer bearing is held against any axial movement by the retainer 20 or 20'- and the guard plate 22 or 22'. The inner bearing however, is not held against axial movement in the seat II or H, whichever-comes any possibility of tightly'binding ,one bearing or another durlng assembly, even if inaccuracies exist in machining, casting or the. like.
Shaft l1 carries an ofl-center weight 2! operable in the casing section 5, and a similar weight 24' is carried by the shaft ll', keys for the two weights being shown at 25 and 25'. The hubs 26 and 26' of these weights, preferably co-act with the gears l8 and It in holding the inner bearings l8 and I 8' against any movement along the shafts l1 and I1: The outer bearings are pressedonto the shafts and abut the hubs 2B and 26'.
In the present showing, shaft I'I' passes through' a packed opening 21 in the guard plate 22' and is provided with a reduced extending portion 28 for the attachment of a driving pulley, thereto. The other shaft I'I could extend in a similar manner should it be desired to provide for driving atively connected by the gearing i8-l6'.
' Two additional semi-circular casing sections 29 and 29' are complemental to the sections 5 and 5' in forming two complete casings for the oilcenter weights 24 and 24' respectively. The casing sections 29-and 29' are integrally joined at their central portions by a substantially semi-circular'wall' I complemental to the wall I in forming a casing 30 for the gearing i8|6', and ob viously this casing and the two weight casings may contain adequate lubricant to insure smooth and easy operation without wear. The owing sections 29 and 29' are provided also with seats which are duplicates of the seats M, i i i5 and I5, said seats of said sections 29' and 29' co-operating with said seats H, M, etc., in holding the inner and outer shaft bearings properly in place. At suitable locations, the casing sections are provided with integral lugs at their abutting edges. Most of these lugs are indicated at 3|, and they receive bolts or screws 32. Additional lugs however, are denoted at 3|, these lugs being not only integral with the inner end walls 6 and 6' of the weight casings, but being integral also with the walls "I and i, forming additional rigid connecting means between the two weight casings. Screws 32' are shown engaged with the lugs '31. Viewed differently, it will be seen that the parts 8, l2, l3 and i5, and the central portion of casing section 29, constitute a rigid support for the bearing l9 at the outer end of shaft l'l; that the corresponding parts 8', l2, l3, and i5, etc. form a rigid support for the bearing H3 at the outer end of shaft l1; and that the casing sections 5 and 29, and 5' and 29', constitute inherently rigid yokes extending transversely around the paths of the weights 2d and 24 respectively, the inner ends of said yokes being rigidly joined to the gear case I, l and the outer ends of said yokes being rigidlyjoinedto said bearing supports, thereby rigidly connecting the supporting means for the inner, bearings with the supporting means for the outer bearings. As these supporting means for the outer bearings are rigidly mounted upon the base H1, it follows that the supporting means for the inner hearings will also be rigidly supported.
By providing the novel construction shown and described, there is no danger of the bearings for one shaft springing or throwing out of proper relation with those of the other shaft, under the influence of the, weights 2% and 26', for the two weight casings are so rigidly and unitarily connected that no relative movements can take place between them, and without such movements, the shaft bearings will be held accurately in proper position. The operation of the weights therefore, has no tendency to cause excessive friction,
wear and noise, and no tendency to cause such distortion of the shaker as to produce deviation in the directions in which the impulses are transmitted to the sieve or the like. The invention therefore provides, even though by a rather'simple and inexpensive structure, for efliciency, durability and quiet operation, free from troubles which commonly exist with shakers of the unbalanced weight type.
While the details disclosed may be considered as preferred, attention is again invited to the possibility of making variations within the scope of the invention as claimed.
1. In a sieve shaker, two substantially flat cy 2. In a sieve shaker, two substantially flat cylindrical weight casings disposed end-to-end in spaced relation and having their axes in spaced parallel relation, said casings being provided with means for attaching them to a sieve, a continuous wall between said casings and integrally' joined to the inner end walls of said casings to rigidly unit the same and to provide a gear case, and central shaft bearings carried by the inner and outer end walls of said casings.
3. In a sieve shaker, two substantially flat cylindrical weight casings disposed end-to-end in spaced relation and having their axes in spaced parallel relation, a base rigidly joined to peripheral portions of both of said casings to rigidly unite said peripheral portions and to provide for attaching the shaker to a sieve, a continuous wall between said casings and rigidly joined to the inner end walls of said casings to rigidly unite the same and to provide a gear case, and central shaft bearings carried bythe inner and outer end walls of said casings.
4. In a sieve shaker, two substantially flat cylindrical weight casings disposed end-to-end in spaced relation and having their axes in spaced parallel relation, a base rigidly joined to peripheral portions of both of said casings to rigidly unite said peripheral portions and to provide for attaching the shaker to a sieve, a, continuous wall between said casings and integrally joined to the inner end walls of said casings to rigidly unite the same and to provide a gear case, and central shaft bearings carried by the inner and outer end walls of said casings.
5. In a sieve shaker, two semi-cylindrical casing sections disposed end-to-end and having their open sides presented at a common plane in which their axes lie, said axes being laterally offset in said plane and disposed in parallel relation, a base at the closed sides of said casing sections and rigidly joined thereto, a substantially semi-circular wall between the inner end walls of said casing sections and integrally joined thereto, said inner end walls and the outer end walls of said casing sections having central semi-cylindrical bearing seats, and annular shaft bearings engaged throughout half of their diameters with said seats, two additional semi-cylindrical casing sections complementary to the aforesaid sections in forming two cylindrical weight casings, said additional casing sections being integrally joined by a substantially semi-circular wall complemental to the aforesaid substantially semi-cylindrical wall in forming a. gear case, said additionalcasing sections having semi-cylindrical bearing seats cotending transversely around the paths of ,saidweights, the inner ends of said yokes being'r igid-. ly joined to said gear case. the-outer ends of 'said.
yokes being rigidly joined to 'siiidi bearing supports WILLIAM T. SEALER.