Year: 1886

page_text: Date of Application, 3rd Dec., 1886
Complete Left, 5th Sept., 1887
Complete Accepted, 18th Oct., 1887.
I, JOHN DONNELLY, of 70, Studley Road, Clapham, in the County of Surrey,
Engineer, do hereby declare the nature of this invention to be as follows:-
Rods and spindles that have sliding motion, such for examples as piston rods and
valve spindles, are liable to considerable wear which necessitates more or less frequent
re-turning or grinding that involves considerable cost besides weakening and greatly
shortening the durability of such parts.
Now my invention has for objects to obviate the need of such re-turning or grinding,
to prevent the weakening referred to, and to enable rods and spindles having
sliding motion to endure a longer period of service than heretofore has been usual.
For this purpose the rod or spindle is according to my invention provided with a
renewable tubular wearing surface that is secured to the rod or spindle proper in
any convenient manner so as to partake of all its movements and to take all the wear
that ordinarily falls upon this part of the rod or spindle itself. The renewable
surface, which I will call the tube, may be of any suitable metal, and when it requires
to be trued up, can be taken off and a new one be put on.
To make it easier to put the tube on and take it off, and as there is no strain
upon it save that due to friction, the inside of the tube can advantageously be of
larger diameter than the rod or spindle. In order to hold the tube in place it is in
one arrangement made at one end to fit a collar on the rod or spindle, and at the other
end a nut is made to fit partly into the tube and is screwed on to the rod or spindle
so as to make the tube quite tight.
According to a modification, instead of using a separate nut, a female screw thread
is formed within one end of the tube to fit upon a male screw formed upon the rod or
spindle. But I do not limit myself to these modes of securing the tube to the rod
or spindle.
By the use of a renewable wearing surface as described the rod or spindle is kept
cool, and, as it is relieved of friction, the danger of binding is obviated.
Dated this 3rd day of December 1886.
W. LLOYD WISE,
46. Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Rods and Spindles having Sliding Motion.
I, JOHN DONNELLY, of Studley Road Clapham, in the County of Surrey, 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 :-
Rods and spindles that have sliding motion, such for examples as piston rods and
valve spindles, are liable to considerable wear which necessitates more or less frequent
re-turning or grinding that involves considerable cost. besides weakening and greatly
shortening the durability of such parts.
Now my invention has for objects to obviate the need of such re-turning or grinding,
to prevent the weakening referred to, and to enable rods and spindles having sliding
motion to endure a longer period of service than heretofore has been usual. For
this purpose the rod or spindle is according to my invention provided with a renewable
tubular wearing surface that is secured to the rod or spindle proper in such a manner
hereinafter described as to partake of all its movements and to take all the wear
that ordinarily falls upon this part of the rod or spindle itself.
The renewable surface, which I will call the tube, may be of any suitable metal, and
when it has become damaged by wear can be taken off and a new one be put on.
To make it easier to put the tube on and take it off, as there is no strain upon it
save that due to friction, the inside of the tube can advantageously be of larger
diameter than the rod or spindle, so as to leave a little space between them.
Fig. 1 of the drawings annexed illustrates a piston rod provided with a renewable
tubular wearing surface A. A which is secured to the piston rod at one end by the
nut B so arranged as to enter the tubular part as shewn at C. The other end of
the tubular part A fits upon the rounded collar D and is pressed into firm contact
therewith by the nut B.
The interior of the tubular part A is of larger diameter than the piston rod as is
indicated in the drawing.
In fig. 2 a similar arrangement is shewn as applied to a rod or spindle such as a
valve spindle, but in this case the collar D against which the tubular part A is pressed
by the nut B is formed of a square section.
Fig. 3 illustrates a modification of the manner of adapting a renewable tubular
wearing surface to a rod or spindle such as a valve spindle.
The tubular part A is attached to the spindle or rod by means of the screw E which
takes into a corresponding screw thread formed in the interior of the tubular part.
The tubular part A is slightly larger in diameter than the spindle or rod over which
it fits.
By the use of renewable wearing surfaces as described the rods or spindles are
kept cooler, and, as they are relieved of friction, the danger of binding is obviated.

page_text: Having described the nature of my said invention and the manner of performing it
I hereby declare that I do not claim broadly the placing of a tube over a spindle to
take the wear but what I do claim is :-
1. A piston rod with renewable tubular wearing surface applied thereto substantially
in the manner described with reference to the drawings annexed.
2. Fixing renewable tubular wearing surfaces upon sliding spindles such as valve
spindles in the manner described with reference to and shewn in Fig. 2 or as in Fig. 3
of the drawing annexed.