Year: 1899

page_text: I, CUTHBERT TUNSTALL, of 3, Bankes Road, Small Heath, in the City of
Birmingham, Manager of Works, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the bearings of the disc-adjusting type, for certain
parts of cycles, such as bottom brackets, wheel hubs, pedals and ball heads, and
has for its object, to provide a more efficient means than has been heretofore
obtained for locking the ball cups or discs in their adjusted positions within the
barrel or body part of the bearing.
In carrying out my invention as applied to a cycle bottom bracket or crank
axle bearing, I take an ordinary barrel or body part, having the usual sockets
or lugs for the reception of the ends of certain of the frame members, and with
the open ends inside screwed, but with the screwing at each said end com-
mencing at a short distance inwards of the mouth, which is made of a diameter a
little larger than the screwed part and is also slightly coned, with the larger end
of the coning coming outermost.
Screwing into each of the wormed parts of the body, a little inwards of the
extreme coned mouth, is a ball cup or disc, which, when screwed home, leaves a
space between the periphery of its outer end and the inside of the mouth.. The
locking ring nut, by which the disc is secured in its adjusted position, may
consist of a washer-shaped ring with a right angle and inside screwed flange
directed from its inner face, the outer periphery of the flange is either plain or
only very slightly coned, and the walls of the same laterally are split, gapped, or
divided at parts up to the washer-like outer ring, which is preferably milled at
its outer edge.
When this locking ring is screwed home into the outer screwed end of the disc,
the flange part of it impinges against the coning at the mouth of the barrel and
the continued rotation of the said ring in being screwed home causes the said
coned mouth to close the split or divided part of the flange around the dise and
increases the frictional contact between the screwed together parts, which are
thus mutually locked.
Instead of the mouths of the barrel being coned they may be plain, and the
coning required to contract the split flanges of the locking rings on to the discs
may be formed on the outer peripheries of the said flanges.
Holes or edge gaps to receive a fork spanner may be formed at the same
distance apart in the outer faces of the discs and locking rings so as to admit
of only one tool being required to screw and unscrew the whole of the parts.
The application of my invention to wheel hubs, ball-heads, pedals and other
bearing parts of cycles differs in no essential respect from its application to a
bottom bracket as herein described.
Dated this 15th day of May 1899.

page_text: Improvements in the Bearings of cycles.
I, CUTHBERT TUNSTALL, of 3, Bankes Road, Small Heath, in the City of
Birmingham, Manager of Works, 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:-
This invention relates to the bearings of the disc-adjusting type for certain
parts of cycles, such as bottom brackets, wheel hubs, pedals, and ball heads, and
has for its object, to provide a more efficient means than has been heretofore
obtained for locking the ball cups or discs in their adjusted positions within the
barrel or body part of the bearing.
Figure 1 of the accompanying drawing represents an elevation of a front-
wheel hub, provided with my improved means for locking the adjustable ball
bearing cup in its adjusted. position.
Figure 2 is an elevation of the adjustable end of the hub.
Figure 3 shows-a-complete longitudinal section of the said hub, and Figure 4
shows a similar view, but with the several component-parts-disassembled from
one another.
Figure 5 represents the said hub upon an enlarged seale, and with one end
thereof in section to represent more clearly the arrangement of the parts by which
the locking of the adjustable bearing cup is effected.
Figure 6 represents an edge view, and an elevation of the inner end, of the
locking ring, which is split at parts, and the split portions contracted around the
cup to be locked, when the ring is screwed home, by the action of an inclined
surface on the body of the hub upon a corresponding surface on the locking ring.
Figure 7 is a view showing the body of the hub only in section (the other parts
being in elevation) and with the locking ring detached.
The same letters of reference indicate corresponding parts in the Figures 1 to 7.
In carrying out this form of my invention as applied to a cycle wheel hub the open
ends a, a of the body part of the hub are inside screwed, but with the
screwing a², at the left hand end a¹, commencing at a short distance inwards of
the mouth, which is made of a diameter a little larger than the screwed part
and is also slightly flared or coned at at, with the larger end of the coning coming
outermost.
Screwing into the wormed part of the body, a little inwards of the extreme
coned mouth; is an adjustable ball cup or disc 7, which, when screwed home,
leaves a space c, between the periphery of its wormed outer end, and the
inside of the taper mouth a. The locking ring nut by which the cup or disc
is secured in its adjusted position, may consist of a washer or ring, with a
right angle and inside screwed flange, directed from its inner face. The outer
periphery of the flange (in the arrangement shown in the drawings) is slightly
coned at, and the walls of the same are laterally split, gapped, or divided at
parts such as, up to the washer-like outer ring, which is preferably milled at
its outer edge.
When this locking ring is screwed home onto the outer screwed end of the
eup or disc (which extends to receive the said ring as shown in Figure 7) the
part of its flange impinges against the coned surface at the mouth of the barrel
and the continued rotation of the said ring in being screwed home causes the said
coned mouth to close the split or divided part of the flange around the bearing
cup and increases the frictional contact between the screwed together parts and
also between the flange of the ring and the body of the hub, so that all the parts

page_text: are thus mutually locked. The opposite mouth end of the hub is usually inside
screwed as at a, and fitted with a screwed in bearing cup e, having a stop
flange e. The ball bearings g, supporting the spindle are located as usual
between races formed in the bearing cups and the cones ¹, on the spindle.
Instead of the mouth a³, of the barrel being coned, it may be plain, as repre-
sented in section in the modified form of wheel hub shown in Figure 8, the
coning on the flange, of the locking rings being sufficient in this arrangement
to contract the splits onto the adjusting disc b, whilst as a further modification,
the split flanges of the rings may be plain and the coned surface for the contrac-
tion of the split parts around the cup to be locked may be formed only within the
mouth or entrance to the body or barrel of the hub or the like.
Holes such as i, or edge gaps, to receive a fork spanner may be formed at the
same distance apart in the outer faces of the discs and locking rings so as to
admit of only one tool being required to screw and unscrew the whole of the parts.
In applying my invention to bottom bracket or crank axle bearings, I propose
to make both the ball-cups adjustable and to secure them by the contraction of
the split flanges of the locking rings by coned surfaces formed either upon both
the mouths of the body and the peripheries of the flanges, or upon the flanges
alone, whilst the application of my invention to the bearings of back-wheel hubs,
ball heads, pedals and other parts of cycles, differs in no essential respect from
its application to a front hub or a crank axle bracket, as herein described.
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:
In the hearings of wheel hubs, crank axle brackets and other parts of cycles in
which adjustable ball cups or discs are employed, locking or securing the said
cups in their adjusted positions by means of a split ring, or split-flanged ring or
washer which is screwed onto the bearing cup and locked thereto, and also to the
barrel or body of the bearing, by the contraction of the split parts through the
medium of coned surfaces formed either around the outer periphery of the ring,
or within the mouth of the body, or upon both the said parts, substantially as
herein described and also as set forth in the accompanying drawing.
Dated this 20th day of December 1899.
CUTHBERT TUNSTALL,
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicant.