J. KRALUND BEARING. APBLIOATIOH FILED SEPT.30,1912
Patented Dec. 22, 1914.
JOHN KRALUND, OF NEW YORK, N. '21, ASSIGNOR TO DOEHLER DIE CASTING COM- ?ANY, OF BROOKLYN, YORK, A CORPORATION OF NEW YQRK.
4 I BEARING.
' particularly to a bearing having an outer shell of non-frangible metal, and a lining of anti-friction metal.
The main object of the invention is to I provide a bearing composed of ashell of a compacted or compressed brass alloy formed to shape so as to provide a walled depression therein for the babbitt, a'sheet of previously compactedBabbitt metal being seated within said depression to confine the entire edge of said babbitt in a manner to prevent the expansion thereof under the stresses of use. And a further object is to provide a bearing wherein both the outer shell and the Babbitt lining will not only be free from blow-holes, but will be so compacted as to insure higher efficiency as an anti-friction agent and greater durability without likelihood of contraction of the bearing upon the shaft, or breakage througlrthe weakening of the structure resulting from Wear.
The invention consists primarily in a bearing 'comprising an outer shell of rolled or drawn brass having a depression therein defined by a continuous Wall, and a sheet of compacted Babbitt metal seated within said depression with its edges engaging the Wall thereof, and in such'other novel features of construction and combination of parts as are hereinafter set forth and described, all as more particularly pointed out in the claims hereto appended.
Referring to the drawings F igure 1 is a perspective view of a bearing embodying my invention; Fig. 2, is a cross section thereof; Fig. 3 is a perspective view of the rolled brass blank; Fig. l is a perspective view of said blank with the raised beads forming the depression and oil pockets pressed up; Fig. 5 is a plan View; with the Babbitt lining in position-- preparatory to giving the final-forming operation to complete the bearing.
out the several views.
Specification of Letters Patent. Pgt-gntgd Dec, 22, 1914;
Application filed September 30, 1812. Serial No. 723,006-
Like letters refer to like other types of bearings, cheapness, compac'tness and durability are special desiderata. For this class of work integrally parts throughcast Babbitt bearings are now being ex tensively used, but in practice this type of hearing has not proven highly satisfactory because of the likelihood of the formation of blow holes in the castings; the inability contracting upon the journal or shaft, owing to the expansion of the alloy; and the liability of the disruption of the casting under the stresses thereon, causing it to break down at the ends. In heavier work, these conditions are obviated by pouring babbitt ma suitable housing and finishing after so poured, or by providing interchangeable brasses. For lightwork such as that for which the bearing hereindescribed is particularly adapted, these practices are impracticable, and are not followed.
By my invention, -1 provide a bearing which may be composed of two elements-so united as 'to form a unitary structure, finished and applicableto a journal or shaft without requiring any fittin One of the elements is o Babbitt metal adapted to bearupon the journal or shaft, and the other element isa tough outer shell having a depression therein in which they fine and hold it against. displacement, ex-' or breaking down under the 111 pension, stresses of use. The dimensions of this outer shell and its formation are such as to impart to the bearing the desired rigidity to avoid contracting of the bearing upon the shaft.
To secure high efliciency, both of the elements entering into the bearing are composed of previously roll'ed'or drawn metal, thus insuring that compacting of the molecules thereof which is desirableas imparting durability to the higher efiiciency as an anti-friction element. In the accompanying drawings, I have in a manner to produce oil pockets g g Structure and shown a blank of drawn or rolled brass having a web a and upon the opposite ends thereof flanges 5 0 b and 0", extending substantially per endicularly from both sides of said Web. See Fig. 3). The outer edges of the flanges b o are rounded or chamfered asshown to minimize the area of outer shell contacting with the hearing or shaft.
The web a adjacent to the sides thereof, is formed upwardly as shown more particularly in Figs. 2 and l, to form the beads d and e, extending from flange Z) to flange 0, these beads being. of substantially the same height as said flanges intermediate these heads. By this means a depression is formed upon. the inner face of the blank, which de inner walls of the flanges b c and the beads (Z and e. In forming up these beads d and e, that portion of the web a between them an the sides of the blank are inclined from the top of the bead to the plane of the Web a at the sides of the depression, which poc ets have the old and well known fdnction of minimizing the expression of thev lubricant from the hearing.
The outer shell, being of brass, not only possesses antifriction qualities, but wears more rapidly than Babbitt metal, sothat with wear upon the babbitt, the bearing of the journal or shaft upon this outer shell instead of tending to cut the journal or shaft, would merely result in such wear upon said outer shell as will preserve the journal or shaft and bring it to bear upon the babbitt.
Seated within the recess defined by the walls of the flanges 7/ c and beads d e, is a sheet h of previously compacted Babbitt metal, this Babbitt metal being fitted to the said depression by expanding it with the same simultaneously with the forming of the blank into semi-cylindrical form preparatory to finishing same.
By simultaneously bending or forming the outer; shell and the Babbitt lining under heavy pressure, the metal of both of these 4 dimensions slightly smaller than those-"of elements is still further compacted and the Babbitt lining is so combined with the outer shell as to be substantially integral therewith.
Prior to bending, the sheet it should be of the depression, so as to permit the expansion of thisshe'ct to place. .00
[is it is so expanded it is brought substantially flush with thetop of the flanges 0 and the beads d e, and is forced'tightly against the walls of these flanges and beads.
The flanges Z) and 0 have the functions at reinforcing the web a and of serving as 20 pressionis continuous and defined by the,
tinned use, is eliminated through the resistor shaft with the exception that it is necesa means for positioning the bearing and holding it against movement 1n 1ts housing.
ing, oil grooves 73 are formed in the face of 1 the sheet 71., the clearance for expansion of the sheet h permitting that displacement of metal necessary to the formation of these grooves.
The blank for the outer shell is first formed by rolling or drawing the brass to produce a strip of the desired conformation and density. This strip is then out into blanks of the .desired length, and subjected to heavy pressure in a forming press to raise the beads d e and form the oil pockets f 9, this step still further compacting the molecules of the brass or imparting greater density thereto.
The Babbitt metal is rol ed into sheets to impart the proper density thereto, and is then cut into blanks of dimensions substantially an eighth of an inch less than the distances between the flanges b 0 and walls d e. The blanks are then placed in the depression defined by the flanges 11 c and walls d e and theassembled structure formed into a semi-cylindrical shape under heavy press'ure.- The application of this pressure expands the sheet hinto engagement with the In a bearing made in accordance with my invention, all of the crushing strains upon "the babbitt are transferred to the flanges 72 c and beads (Z c, which being of tough and nonfran'gible material, prevent any distortion or disruption of this babbitt.
Any tendency of the bearing to contract upon the journal or shaft through conance of the outer shell to distortion, great strength being secured by the formation of the flanges b b c and 0' along the ends of the outer shell. 3 p
Upon the final forming to a semi-cylindrical shape, the bearing is complete and finished, ready for application to a journal sary to grind off the side edges of the outer shell. The bearing comes perfectly true, as
is defined by substantially continuous walls,
I thereof whereby and may be in any form to adapt it to the configuration of any particular journal or Having described my claim as new and desire by Letters Patent, is 3 1. A bearing comprisin an outer shell of rolled or drawn brass aving a depression therein defined by a substantiall continuous wall, and a sheet of compacte Babbitt metal seated in said depression with its edge engaging the walls thereof. 4
. 2. A hearing comprising an outer shell of to have protected rolled or drawn brass semi-cylindrical in form, and consisting of a central Web, end flanges projecting therefrom, and beads drawn up from said web adjacent the sides a sheet of compacted Babbitt metal seated in sa id depression with its edge engaging beads. I
3. A bearing comprising an outer shell of rolled or drawn brass semi-cylindrical in form and consisting of a central Web, end
flanges projecting therefrom, and beads invention, what I a depression is provided defined by said flanges and said beads, and.
drawn up from said web adjacent the sides thereof, said'web being inclined from each said bead to the side of said web whereby oil pocketsare formed adjacent said depression,1 and a sheet of compacted Babbitt meta seated in said depression with 11's I edge engaging said flanges and said beads.
bear ng comprising an outer shell of rolled or drawn brass semi-cylindrical in form and consisting of a central web, 'end flanges projecting from" both sides thereof,
and beads drawn up from said Webadjacent the sides thereof and within said shell and a sheet of compacted Babbitt metal seated in said depression with its edge engaging said inner flanges and said beads.
- bearing comprising anouter shell of rolled or drawn brass semi-cylindrical in form, andconsisting of a central Web, end flanges projecting therefrom, and beads drawn up from said web adjacent the sides thereof whereby adepression is provided defined by said flanges and. said beads, and a sheet of compacted Babbitt metal seated in said depression with its edge engaging said flanges and said beads, face of saidsheet of Babbitt metal'bein substantially flush with" the tops of sai flanges and said beads. P
In witness whereof, I have hereunto y, aflixed my signature, in the presence of two subscribing Witnesses, this 26th day of September, 1912.
JOHN KRALUND. -Wit nesses:
Orro MUNK, EqoENn UPRING.
the inner sur-