Improvements in the Manufacture of Retaining-rings for Railway- buffer and other Springs.
Year: 1889

page_text: Date of Application, 20th Nov., 1889
Complete Specification Left, 20th Aug., 1890-Accepted, 20th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Retaining-rings for Railway-
buffer and other Springs.
-
I, WILLIAM MCLAREN, of 21, Canfield Gardens, Priory Road, West Hampstead,
in the County of Middlesex do hereby declare the nature of this invention to be as
follows:-
:-
My invention relates to the manufacture of retaining rings for use in springs such
as are employed in the buffers of railway carriages or wagons and other vehicles,
that is to say, springs consisting of a series of rings of elastic material, such as india-
rubber, placed upon a rod or bar one behind another and each having within it a
metal retaining ring which prevents undue compression of the said india-rubber ring.
And my said invention is designed to increase the efficiency and durability of the
said rings.
Heretofore it has been usual to make such retaining rings of malleable cast iron;
but rings so made are objectionable by reason of their liability to breakage or
twisting.
According to my invention I manufacture the said retaining rings from sheets or
plates of steel or other metal as hereinafter described, that is to say; I cut a disc of
sheet metal of the required thickness and of suitable diameter according to the desired
diameter of the retaining ring and to the width of rim required thereon. I then sink
or draw up the said disc to the required form between suitable dies in a drawing
press, I take two discs each formed with a rim or flange in the manner above
mentioned and I secure these discs firmly together by means of rivets or otherwise in
such a manner as to form the retaining ring. The india-rubber ring can be moulded
upon this retaining ring in the ordinary manner.
I find it advantageous in forming in the said discs, the holes for ensuring the
retention of the india-rubber ring upon the retaining ring, to make the holes in one
disc larger than those in the other disc, and to turn or bend the metal around the
holes in the latter disc so that it can pass through the holes in the first named disc and
can then be clinched over, thus very rigidly uniting the two discs.
I sometimes form the entire retaining ring from a single disc of sheet metal by
employing suitably shaped dies in the drawing-press, the disc being dished or cupped
from each side thereof, and one or more holes being formed in the said disc to receive
the india-rubber or other elastic material.
Dated this 20th day of November 1889.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Retaining-rings for Railway-
buffer and other Springs.
I, WILLIAM MCLAREN, of 21 Canfield Gardens, Priory Road, West Hampstead,
in the County of Middlesex, 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 :-
My invention relates to the manufacture of retaining rings for use in springs such
as are frequently employed in the buffers of railway carriages or waggons and other
vehicles, that is to say, springs consisting of a series of rings of elastic material, such
as india-rubber, placed upon a rod or bar one behind another and each having com-
bined with it a metal retaining ring to prevent undue compression of the said india-
rubber ring. And my said invention is designed to increase the efficiency and
durability of the said retaining rings.

page_text: Heretofore it has been usual to inake such retaining rings of malleable cast iron;
but rings so made are objectionable by reason of their liability to breakage or
twisting.
According to my invention, I manufacture the said retaining rings from sheets or
plates of steel or other metal as hereinafter described, with reference to the accom-
panying drawings, in which
Figure 1 is a plan, and
Figure 2 a transverse section on the line a, a, Figure 1, showing one form of
retaining ring constructed according to my present invention.
Figure 3 is a plan, and
Figure 4 a central transverse section, showing another form of modification of my
improved retaining ring.
In making the retaining ring shown in Figures 1 and 2, I proceed as follows,
viz. I take two discs of sheet metal of the required thickness and of suitable
diameter, according to the desired diameter of the retaining ring and to the width of
rim required thereon, and I sink or draw up the said dises between suitable dies in a
drawing-press to the required form, that is to say, until they assume approximately
the form of the pieces A shown in Figures 1 and 2. I then take the two pieces A,
each formed with a rim or flange in the manner above mentioned, and I secure the
said pieces firmly together by means of rivets or otherwise in such a manner as to
form the retaining ring as shown in Figure 2. The india-rubber ring can be moulded
upon this retaining ring in the ordinary manner.
I find it advantageous in forming, in the said discs, the perforations or holes for
ensuring the retention of the india-rubber ring upon the retaining ring, to wake the
holes in one disc larger than those in the other disc, and to turn or bend up the metal
around the holes in the latter disc so that it can pass through the holes in the first
named disc and can then be clinched over, thus very effectually uniting the two
discs.
This arrangement is shown in Figures 1 and 2, wherein one of the said pieces is
provided with suitable elongated perforations or slots B, while the metal of the other
piece in positions corresponding with these perforations, is formed or worked by dies
or other suitable means into projections or lips C, so that, when the two pieces A, A
are placed together, the said projections C will extend through the perforations B.
The edges of the said projections are then turned over or clinched around the edges
of the perforations as shown, thereby securing the two parts A strongly and rigidly
together.
I sometimes form the entire retaining ring from a single disc of sheet metal by
employing suitably shaped dies in the drawing-press, the disc being dished or cupped
from each side thereof, as shown in Figures 3 and 4, and one or more holes being
formed in the said disc to receive the-india-rubber.or other elastic material.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 wish it understood that
I claim :-
First. The manufacture of retaining rings for railway-buffer and other springs
from sheet metal, substantially as hereinbefore described.
*Second. A retaining ring, for the purpose above specified, consisting of two
flanged discs formed from sheet metal and united substantially as hereinbefore
described.
Third. A retaining ring, for the purpose above specified, formed from a single disc
of sheet metal substantially as hereinbefore described with reference to Figures 3 and 4
of the accompanying drawings.
ས-བ
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant