Year: 1898

page_text: We, WILLIAM HENRY LOCK, Manager and Secretary of The Linotype Company,
Limited, of No. 188, Fleet Street, in the City of London, and CHARLES WALTER
PASHLEY, of Sinderland, Dunham, in the County of Chester, Engineer, do here-
by declare the nature of this invention to be as follows:-
The present invention relates to improvements in ball and socket joints.
In ball and socket joints as generally made up to the present time, the wear
can be taken up only by setting one portion of the socket or one of the so called
cones, as the case may be, up towards the other, and consequently moving the
ball or moving portion of the joint, till its centre stands away from its original
position by a distance equal to the take up.
The object of the present invention is to endow any joint of the type just
described, with a faculty of being taken up without either portion of the socket
or either cone being advanced towards the old centre of the joint more than the
other portion or cone, or without moving the ball or moving member of the
joint out of its original position.
That object is realised by the following means. There is a loose ring on each
side of the ball or moving part, such ring being coned internally. Both rings
are of a proper diameter to hold the ball between them in practically the same
way, as far as the mere holding of it is concerned, as the moving part has been
held hitherto. They themselves are held up to the said moving part by two
bushes. Each bush is conveniently L-shaped in section so as to fit over and up
to the whole outer surface of the respective ring. The meeting portions of the
bushes are prolonged, the diameter of one being enlarged and both screw-
threaded to engage with each other. Further, the outside of the female pro-
longation is screw-threaded to engage in a correspondingly screw-threaded socket
in the fixed part that carries the whole joint. But the pitch of this last men-
tioned pair of screw threads is exactly twice as fine as that by which the two
bushes engage each other, so that the bush having only the male screw-thread
on it being held to the said fixed part, and the other bush screwed up towards
it, both are advanced towards each other and the centre of the moving part and
set up towards the latter equally.
Suitable devices are provided for locking the two bushes to the said fixed
part independently of each other after they have been set up.
Dated this 17th day of March 1898.
CHARLES S. WOODROFFE,
Agent for the Applicants.

page_text: Improvements in Ball and Socket Joints.
We, WILLIAM HENRY LOCK, Manager and Secretary of The Linotype Company
Limited, of 188, Fleet Street, in the City of London and CHARLES WALTER
PASHLEY, of Sinderland Lane, Dunham, in the County of Chester, Engineer, do here-
by 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:
.
. I
The present invention relates to improvements in ball and socket joints. In
the latter as generally made hitherto, the wear can be taken up only by setting
one portion of the socket, or one of the so-called cones, as the case may be, up
towards the other, and consequently moving the ball or moving portion of the
joint, till its centre stands away from its original position by a distance equal
to the take up.
-
The object of the invention is to endow any joint of the type just
described, with a faculty of being taken up without either portion of the socket
or either cone being advanced towards the old centre of the joint more than the
other portion or cone, or without moving the ball or moving member of the
joint out of its original position. That object is realised by the means illustrated
in the accompanying drawings which are to be taken as part of this specification
and read therewith. In them
Figure 1 is a side elevation illustrating the application of the invention to the
tracer rod of the engraving machine described in the Specification of Letters
Patent 11938 of 1895, and
Figure 2 is a plan,
The tracer rod D works through a ball and socket joint supported by a bracket C¹
adjustable upon the standard C. is the ball or moving part of the joint
through which the rod D passes and is capable of working freely therein in a
vertical direction. These parts are not affected by the present invention and
for that reason more detailed specification of them is unnecessary, further than
this that the bracket C stands for the fixed part that carries the improved
joint.
There is a cone a on each side of the ball. Both cones x are of a proper
diameter to hold the ball between them in practically the same way, as far
as the mere holding it is concerned, as the moving part of any ball or socket
joint has been usually held hitherto. The faces which bear upon the bail.
are straight. The two cones are held up to the ball by two bushes
The bush is. T shaped in cross section. One portion, 7, of it, fast down
upon the respective face of the respective core, and the central portion
which is parallel with the axis of the rod D, fits up to the respective face of the
said cone, each in the way usual in cone bearings; while the third portion a
stands in a recess 10 in the bracket C¹, but at a proper distance from the bottom
of that recess to allow of it being moved up to the said bottom to take up wear,
as indicated in Figure 1 which shews an appreciable distance between the two.
Further, the portion is prolonged for as much as is required by the take up
action described further on.
The bush is shaped in cross section and embraces the respective cone x
in the same way as the portions, 8, of the bush, embrace their cone x. all
is an annular prolongation of that portion 12 of the bush which is aligned with
the portion above described. There is a suitable recess in the bracket C¹ to
receive the bush 6. The outer surface of the portion and the inner surface
of the prolongation all are screw threaded to engage with each other. The outer

page_text: surface of the prolongation and of the portion and the opposite surface
of the last mentioned recess in the bracket C, are screw-threaded to engage
with each other. The two screw threads just described, being the one between
the bush and the bush a6 and that between the bush 6 and the bracket C1
are dissimilar in pitch, the latter being twice as fine as the former, i.e., if the
thread of the bush has 20 threads to the inch, that of the bush 2 has
40 threads.
a is a pin and ¹ a locking nut for respectively holding the bushes, 6,
in their adjusted positions to the bracket C¹..
The parts of the improved joint are put together in the following way. The
cones a, a, are inserted in their respective bushes, x, and the bush with
the ball resting upon the respective cone a, is screwed into the bracket C¹
until that ball is in its correct position. The bush is next screwed into the
bush, until its cone just touches the ball . The hole for the holding pin 13
is then drilled, half of it in the bracket C¹ and half of it in the bush, and the
pin inserted therein. The locking nut 4 is then screwed over the bush 26
and up to the bracket C to prevent the said bush working loose.
screwed up
To take up wear, the locking nut is loosened and the bush
until both cones a press with sufficient tightness upon the ball x², whereupon
the nut 4 is screwed up again.
ti
The above described proportion between the two screw threads, ensures
constant position for the ball no matter how much wear has to be taken up,
because the bush is moved twice as far in the direction of the rod D as the
bush is, the motion in the same direction of the bush over-lapping half of
the corresponding motion of the bush ³.
The said proportion between the screw threads is the correct one for a joint
where the weight of the moving part will not cause more wear on one side than
on another. To meet a case in which the wear is unequal, that proportion may
be varied according to the excess wear on the one side.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:
-
1. In a ball and socket joint, the herein before described combination with
the ball or moving portion of the joint, of a cone and bush on each of two opposite
sides of it, one bush engaging the other by a screw thread on the outside thereof
and the fixed part that carries the joint, by a screw thread twice as fine as the
former.
2. In a ball and socket joint, the hereinbefore described combination with
the ball or moving portion of the joint, of a cone and bush on each of the opposite
sides of it, one bush engaging the other by a screw thread on the outside thereof
and the fixed part that carries the joint by a second screw thread, the respective
pitches of the threads having the specified relation to each other.
Dated the 29th day of December 1898.
CHARLES S. WOODROFFE,
188, Fleet Street, E.C., Agent for the Applicants.