Improvements in and relating to Ball Bearings for Cycles and the like.
Year: 1897

page_text: [Communicated from abroad by THE BORUSSIA FAHRRAD-WERKE, KICHARD DIEBERT,
of 95, Prinzenstrasse, Berlin, in the Empire of Germany.]
Improvements in and relating to Ball Bearings for Cycles and the
like.
I, CHARLES JUNGE, of Lincoln Chambers, 75, Chancery Lane, London, W.C.,
Consulting Engineer, do hereby declare the nature of this invention to be as
follows:
My invention relates to ball bearings for cycles and the like and comprises a
crank axle bearing which, by reason of its construction, runs very easily and is
perfectly dust proof.
A crank axle bearing constructed according to my said invention comprises a
casing, brasses or cups which form cylinders, each of the cranks being made in
one piece with one half of the axle, and a sleeve surrounding such axle. The
cylindrical cups or brasses are screwed together interiorly, and the halves of the
axle are joined, one half being provided with a right-handed and the other with a
left handed screw thread. At the axle the cranks form dust covers and extend
over the ends of the said brasses or cups. Between these brasses or cups and the
sleeve firmly connecting the halves of the axle the balls are arranged in as close
proximity as practicable to the ends of the crank axle bearing so as to ensure a
very easy and uniform movement of the same. In order to mount the bracket the
two brasses or cups are first connected with each other around the sleeve and are
slid together with this sleeve into the casing. Then the halves of the axle on the
cranks are pushed into the said sleeve, the latter being held by means of a spanner
passed from the outside through the casing and the brasses or cups, thus preventing
the turning of same, whereupon one of the cranks is turned. By this turning
movement the halves of axle, owing to the right handed and left handed screw
threads, are firmly drawn together through the intervention of the sleeve so that
they will constitute a rigid whole. Then the brasses or cups are adjusted and
finally fixed in their position by tightening clamping screws provided on the
casing. With the object of enabling the before-mentioned sleeve to be easily
reached and held from the outside by the spanner the casing is furnished with an
aperture and the brasses or cups with longitudinal slots, the latter serving on the
one hand for the passage of the spanner and on the other hand for diminishing the
weight.
قيم
1
1005

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Ball Bearings for Cycles and the
like.
I, CHARLES JUNGE, of Lincoln Chambers, 75, Chancery Lane, London, W.C.,
Consulting 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 statements :-
My invention relates to ball bearings for cycles and the like, and comprises a
crank axle bearing which by reason of its construction runs very easily and is
perfectly dust proof.
In the accompanying drawing
Figure 1 represents a section of my improved ball bearing fitted into the
bottom bracket of a cycle.
Figure 2 is a detached section thereof.
Figures 3 and 4 are views of the two parts of the crank axle.
Figure 5 is a view of the key.
A crank axle bearing constructed according to my said invention comprises two
cups C¹ C² furnished with screw threads g for screwing them together, and made
so as to form ball races interiorly at their outer ends. Each of the cranks K is
made in one piece with the part K¹ or K² of its axle, one of these parts having a
right handed and the other a left han led screw thread c¹ or c², by means of which
they are screwed into the axle sleeve A which is furnished with a ring or collar
presenting a notch 2 into which the flat end t¹ of the key t fits. At its end the
part K of the axle is recessed to receive the taper end of the part K², and is
provided with a slot q, thereby giving the cranks a certain amount of elasticity.
The axle sleeve A is made near its extremities with collars A¹ constituting together
with the ends of the cups C1 C2 the ball races.
Openings in the ends of the cups C1 C2, through which the extremities of the
sleeve A. extend, are furnished with felt rings f designed to preclude the access of
dust.
In dismounting the bearing the balls are prevented from falling out by perforated
rings w. Any wear of the balls is compensated for by screwing the cups C¹ C²
closer together. In order to mount the bracket the said cups are first connected
with each other around the sleeve A, the whole being fitted into the bracket
casing G.
Then the parts K' and K2 of the crank axle are pushed into the said
sleeve A held by means of the key t which is passed through the hole t2 so that its
point is caused to engage with the notch 2 in the ring or collar r¹ to prevent the
turning of the sleeve A, whereupon one of the cranks K is turned, and as the parts
of the axle have right handed and left handed screw threads they will be firmly
drawn together through the intervention of the said sleeve A, thus constituting a
rigid whole. Finally the cups are adjusted and fixed in their position by set screws
(not shown) provided on the bracket casing G.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
First. A ball bearing for cycles and the like, wherein the crank axle made in two
parts K1 K2 is held by right handed and left handed screw threads c¹ c² in a
sleeve A, the ends of which form ball races in conjunction with the ends of 4
cups CC joined by screw threads and carried in the casing G of the bottom
bracket, dust tight joints being made round the ends of the said sleeve A by means
of felt rings f, substantially as and for the purpose set forth.

page_text: Second. In a ball bearing for cycles and the like the joining of the two
parts K K of the crank axle by the sleeve A, the taper end of one part engaging
with a corresponding recess in the other part provided with a slit q, substantially
as and for the purpose set forth.
Third. A ball bearing for cycles and the like, arranged, constructed and operating
substantially as and for the purpose hereinbefore set forth and shown in the
drawing.