An Improved Disc Adjustment for Ball-bearings.
Year: 1899

page_text: An Improved Disc Adjustment for Ball-bearings.
I, ENRICO DE TONI, of 25, Richmond Street, in the County of London, Cycle
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in ball bearing disc adjustments of
the kind wherein the adjustable cup is screwed into the split end of the hub and
is retained in the position to which it is adjusted by a ring or collar which is
screwed on to the outside of the split hub end.
Now, my invention has for its object to provide improved means for tightening
the split hub-end upon the adjustable cup and to this end I form an annular
semicircular or tapering recess upon the outside of the split hub end, the said
semicircular annular recess serving as a ball race for a number of balls which
are held in position therein by an external ring or collar which is screwed upon
the externally screw-threaded split hub end.
With this arrangement when the external ring is turned so as to allow the
balls to rest in the bottom of the recess, the cup can be adjusted, but when the
said ring is turned so as to force the balls to one side of the recess, the split end
is tightened upon the cup which is thereby rigidly held in the position to which
it has been adjusted.
The cup at the chain wheel end of the hub can also be fixed in position by
splitting the hub end and tightening it upon the said cup by the ring usually
employed for securing the chain wheel to the hub.
Dated the 13th day of January 1899
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
An Improved Disc Adjustment for Ball-bearings.
I, ENRICO DE TONI, of 25, Richmond Street, in the County of London, Cycle
Engineer, 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 improvements in ball bearing disc adjustments of
the kind wherein the adjustable cup is screwed into the split end of the hub and
is retained in the position to which it is adjusted by a ring or collar which is
screwed on to the outside of the split hub end.

page_text: Now, my invention has for its object to provide improved means for tightening
the split hub-end upon the adjustable cup and to this end I form an annular
semicircular or tapering recess upon the outside of the split hub-end, the said
annular semicircular recess serving as a ball race or holder for a number of
balls which are held in position therein by an external ring or collar screwed
upon the externally screw-threaded split hub-end.
With this arrangement when the external ring is turned so as to allow the
balls to rest in the bottom of the recess, the cup can be adjusted, but when the
said ring is turned so as to force the balls to one side of the recess, the split end
is tightened upon the cup which is thereby rigidly held in the position to which
it has been adjusted.
To enable the invention to be fully understood I will describe it by reference
to the accompanying drawing, in which:-
Figure 1 is a sectional elevation of a bicycle hub having my improvements
applied thereto :
Figure 2 is a section of the end of the hub shewn in Figure 1 the said section
being drawn to an exaggerated scale; and
Figures 3 and 4 are sections of the hub-end and external ring or collar shewing
the parts in different relative positions.
a is the axle or spindle and b is the hub, the said hub having its ends split in
the usual manner to enable them to be tightened upon the adjustable bearing
cups c, c.
dis the approximately semicircular recess which is made upon the outside of
the split end of the hub b, the said recess serving to receive a number of balls c,
and is the external ring or collar which is internally screw-threaded so that it
can be screwed upon the externally screw-threaded split hub-end. The said ring
is formed with an internal recess which can be brought to coincide with the
external recess upon the split hub-end, as shewn in Figure 2, in which position
of the parts the balls can be introduced into the ball race thus formed by
removing the screw h.
With this arrangement when the external ring f is turned in either direction
so as to bring the parts into the position shewn in Figure 3 or 4, the ring f
forces the balls to one side of the recess d thereby tightening the split end of
the hub on to the cup c which is thus rigidly held in the position to which it
has been adjusted. When it is required to readjust the bearing the external
ring is turned so as to bring the parts into the position indicated in Figure 2,
that is to say, so as to allow the balls to rest in the bottom of the recess d whereby
the split end of the hub b is loosened from the adjusting cup which can then
be turned as desired.
In the drawings I have shewn my improvements applied to one end of the hub
only but it will be obvious that they can be applied to both ends if desired.
Where the usual chain wheel i is screwed upon one end of the hub, as is the
case in the hub shewn in Figure 1 of the drawing, I secure the cup cat this
end of the hub in position by splitting the hub-end in the usual manner and
tightening it upon the cup by the ring which is usually employed for securing
the chain wheel to the hub.
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. In disc adjustments for ball bearings of the kind wherein the adjustable
cup is screwed into the split end of the hub and retained in position by an
external ring or collar, providing an external recess upon the split hub end and
an internal recess in the external ring thereby forming a space for balls which
can tighten the split hub end on to the adjusting cup when the said external
ing is turned in either direction, from its central position, substantially as
hei inbefore described.

page_text: 2. Dise adjustments for ball bearings constructed substantially as hereinbefore
described.
3. Hubs having ball bearings constructed substantially as hereinbefore described
and illustrated in the accompanying drawing.
Dated the 10th day of October 1899.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.