Improvements in and relating to Roller Bearings.
Year: 1898

page_text: Date of Application, 10th Sept., 1898-Accepted, 15th Oct., 1898-
COMPLETE SPECIFICATION.
Improvements in and relating to Roller Bearings.
I, GEORGE CROYDON MARKS, of 18, Southampton Buildings, Chancery Lane,
London, W.C., Consulting Engineer and Patent Agent, (being a communication
from Bernard Granville, of Providence, Rhode Island, in the United States of
America), do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
-
The
This invention relates to roller bearings of the type in which a cage is employed:
for maintaining the rollers spaced apart and parallel to the axle of rotation."
invention has for its object to effect greater economy in the production of such
bearings by the formation of the cages from sheet metal or drawn tube in such
a manner that the rollers shall be spaced apart by the cage and not necessarily
held thereby.
Heretofore it has been customary in the production of roller bearings of this
class to provide a retaining cage from cast metal in which the pockets for the
reception of the rollers were milled to form a smooth bearing of a corresponding
shape to that of the rollers while the rollers were held and retained in their
pockets by means of a cap secured to the cage. The milling. of the circular shaped
pockets and the formation of the cage to permit of the rollers passing into
the pockets is costly and it is the object of the present invention to avoid the trouble.
and expense incurred by such a construction of the bearing.
The invention consists in providing a cage for such a roller bearing from sheet
metal or drawn tube in which the pockets are formed by being pressed out from the
metal, and in which when sheet metal is employed the sheet is formed to a circular
shape with its ends dovetailed or otherwise connected together thus forming a
complete roller cage into the pockets of which the rollers may be conveniently
introduced.
In the accompanying, drawings,
Figure 1 is a plan of the metal blank pierced for the formation of the cage.
Figure 2 is an elevation of the same strip with the cut lips diverted to form
pockets for the rollers,
Figure 3 is a plan corresponding to Figure 2, and
Figure 4 is a sectional elevation of a complete cage made from metal strip,
and,
Figure 5 is a front elevation corresponding thereto.
Figure 6 is an elevation of a tube or cup H from which the cage may be
made.
Figure 7 is a cross section of a cage formed from a tube or cup H, and
Figure 8 is a plan corresponding to Figure 7.
In carrying the invention into effect as illustrated in Figures 1 to 5 of the
accompanying drawings I take a continuous strip of metal A of a width corre-
sponding to the length of the cage to be made and I feed this strip A into a power
press where it may be cut and formed by the necessary series of operations in one

page_text: press or in a series of presses. The strip A is first pierced or cut on the lines b
along the length that is cut to form one complete cage by the formation of two
lips aa for eventual formation into a pocket. The extremities of the strip are
preferably provided with dovetailed projections D and recesses E for engagement
one with the other in completing the formation of the cage. The lips a a are next
pressed out and formed to a curvature corresponding to that of the rollers G and
as illustrated in Figure 2 to such an extent that internal apertures c shall be left
through which the rollers may be introduced so as to loosely lie therein while
external apertures shall be left of a width smaller than the diameter of the
rollers G. The strip is next formed into a circle (Figures 4 and 5) and its ends
are secured together by a dovetail or other joint.
In the withdrawal of the cage A from a bearing, the introduction of an internal
plug to substitute the shaft or spindle will prevent the rollers falling out.
In carrying the invention into effect as illustrated in Figures 6 to 8 of the
accompanying drawings, I may produce a tube H of a corresponding length to that
of the cage required either by cupping or stamping the tube from a blank or by
cutting from a length of drawn tubing and I pierce or cut this tube from each
of the pockets preferably at one operation cutting and forming the pockets in
succession on the cage upon the lines indicated in dotted lines in Figure 6.
By so forming the cage the necessity of a dovetail or other joint is avoided.
In the modifications illustrated in the drawings the cage is formed for the
reception of the rollers from within but it is obvious that the lips may be so
formed as to permit of the introduction of the rollers from within or from without
or solely from without.
No limitation is placed to the actual means illustrated of fastening the ends of
the strip for the formation of the cage nor yet to the actual shape of the lips
forming the pockets. The strip is preferably of Bessemer sheet steel.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. A roller bearing consisting of a cage provided from strip metal or drawn tube
and having pockets for the reception of the rollers formed of the metal of which
the strip forming the cage is composed substantially as and for the purpose
herein before described.
2. The formation of a roller bearing from strip metal or drawn tube in the
manner for the purpose and substantially as herein before described.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
HOUR
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.