-Improvements in Roller Bearings for Axles and Shafts.
Year: 1896

page_text: Date of Application, 6th Oct., 1896-Accepted, 6th Mar., 1897
"
COMPLETE SPECIFICATION.
-Improvements in Roller Bearings for Axles and Shafts.
1, LEE OLIVER GILLILAND of 107 Dearborn Street, Chicago in the State of
Illinois one of the United States of America, Broker, 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 invention relates generally to roller bearings for shafting, and the object is
to provide means for holding the rollers apart from one another in action or
preventing such displacement as might cause the rollers to come in contact or shift
fongitudinally.
This object is attained by the means illustrated in the accompanying drawings.
in which:
Fig. 1 is a side elevation partly in section of a hub and shaft or spindle for a
bicycle wheel provided with a roller bearing embodying the invention.
Fig. 2 is a cross section on the line 2-2 of Fig. 1.
Fig. 3 is a detail showing a perspective view of one of the rollers detached.
In the drawings, A designates the hub, B the shaft and C the rollers, the shaft
being fixed and the hub revoluble, and the shaft and rollers being made of tubing-
in order to reduce their weight.
The interior of the hub A, or journal box, near its ends, and the exterior of the
shaft B, are provided with two or more rows of projections a and b which are
preferably semi-globular in form. Generally these projections are best made and
secured in position by being in the form of pins applied in holes through the wall
of the box aud in the shaft, the pins being forced in under sufficient pressure to
cause them to become fixed in the holes. But for bicycle hubs, as distinguished
from other journal boxes, I prefer to make the hub of an inner part A 1 and an
outer part A 2, the inner part having the ends thickened where the pin holes are,..
so that the pins may have heads a 1 countersunk therein to be covered with the
outer part A 2, which is fixed to the part A1 by means of caps B1 threaded
thereupon and abutting the ends of the outer part. In this manner the interior-
projections a of the hub may be maintained in place without being so rigidly
fixed in the pin holes as otherwise they should be. The rollers are provided
with two or more rows of depressions or recesses c which are severally formed
and placed to correspond with the projections a and b of the box and its shaft or
journal:
It should be observed that the several depressions or recesses c and the pro-
jections a and b are arranged in helices or twists to the axes of rotation and object.
being to use large recesses and projections and yet have less pitch; and it will be
seen that by increasing the number of rows of recesses and projections the base of
the recesses and projections can be increased and their pitch lessened relatively to
the circle of pitch-line.
The several projections and depressions are in coincident radial position upon.
the several bearing surfaces.
It is essential, when the journal box is one inseparable part, that the projections
on the box be left out until the rollers and shaft are assembled in the box. When
assembled and all the projections are in place the rollers are thereby held in
position so as to revolve freely and carry the shaft without liability to displace-
ment that might cause them to come into contact with one another or to shift.
longitudinally.

page_text: It is obvious that the projections might be put upon the rollers and the
depressions in the shaft and box to produce the same result.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
In a roller bearing the combination of a box, journal and rollers having
cylindrical bearing surfaces and a series of projections and depressions-placed in
separate rows and arranged upon a spiral or twist, said several projections and
depressions being in. coincident radial position upon the several bearing surfaces as
specified.
Dated this 6th day of October 1896
HERBERT, HADDAN & Co.,
18, Buckingham Street, Strand, London.