Improvements in Apparatus for Manufacturing Hoops or Buckles for Laminated Springs.
Year: 1890

page_text: Date of Application, 12th Apr., 1890
Complete Specification Left, 9th Jan., 1891-Accepted, 21st Feb., 1891
Improvements in Apparatus for Manufacturing Hoops or Buckles
for Laminated Springs.
1, HERBERT WOODRUFF, of Carr Holme, Wadsley Bridge, near Sheffield, in
the County of York, Engineer, do hereby declare the nature of this invention to be
as follows:-
--
The lamina of railway and other similar springs are held together by a hoop
or buckle which consists of a rectangle enclosing the lamina holding them together.
Two opposite sides of the rectangle are commonly produced sometimes in one and
sometimes in both directions the prolongations serving as attachments.
Such hoops have been generally manufactured in the following manner :-
:-The
two produced sides are connected at their end or ends by means of a shaped
piece of metal, the two sides of the being welded to the ends of the sides of the
rectangle. It is found however difficult to make sound welds and the process
requires great skill and occupies a considerable time each joint being welded
separately.
According to this invention I employ the following apparatus for welding
together the various pieces forming such a hoop.
provide a five sided box or die of sufficient size to receive the rectangle and
the extensions of its sides. The die is preferably made in two halves hinged
together so as to allow of the hoop being readily removed. In the bottom of this
die I form holes through which mandrels rise. One hole receives a mandrel of the
size of the inside of the rectangle and another hole receives a mandrel to fit the
space between the prolongations of two of the sides of the rectangle and the third
side, and if the sides are prolonged in both directions there is a third mandrel to
similarly fit the other end. The pieces forming the hoop having been heated are
placed on the die which rests upon an anvil with the mandrels in it a hammer is
brought down onto the top of the hook forcing it into the die and thus pressing the
parts of the hoop and welding them together or the hoop may be forced into the
dic by other well known means. The mandrels are readily driven out of the hoop
by a hammer, the die being placed over the side of the anvil to allow this to be
done. When the mandrels have been driven out the die is opened, leaving the.
completed hoop.
Dated this 19th 1. LA
1 1000
COMPLETE SPECIFICATION.
Improvements in Apparatus for Manufacturing Hoops or Buckles
for Laminated Springs.
I, HERBERT WOODRUFF, of Carr Holme, Wadsley Bridge, near Sheffield, in
the County of York, 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: -
The lamina of railway and other similar springs are held together by a hoop or
buckle which consists of a rectangle enclosing the laminæ holding them together.
Two opposite sides of the rectangle are commonly produced sometimes in one and
sometimes in both directions the prolongations serving as attachments.
:-The
Such hoops have been generally manufactured in the following manner :-
two produced sides are connected at teir end or ends by means of a
shaped

page_text: piece of metal, the two sides of the ☐ being welded to the ends of the sides of the
rectangle. It is found however difficult to make sound welds and the process
requires great skill and occupies a considerable time each joint being welded
separately.
According to this invention I employ the following apparatus for welding
together the various piecesi forming such a hoop.
I provide a,five sided box or die of sufficient size to receive the rectangle and the
extensions of its sides. The die is preferably made in two halves hinged together
so as to allow of the hoop being readily removed. In the bottom of this die I form
holes through which mandrels rise. One hole receives a mandrel of the size of the
inside of the rectangle and another hole receives a mandrel to fit the space between
the prolongations of two of the sides of the rectangle and the third side, and if the
sides are prolonged in both directions there is a third mandrel to similarly fit the
other end. The pieces forming the hoop having been heated are placed on the die
which rests upon an anvil with the mandrels in it a hammer is brought down onto
the top of the hoop forcing it into the die and thus pressing the parts of the hoop
and welding them together or the hoop may be forced into the die by other well
known means.
The mandrels are readily driven out of the hoop by a hammer, the
die being placed over the side of the anvil to allow this to be done.
mandrels have been driven out the die is opened, leaving the completed hoop.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
When the
Figure 1 is a side view, and Figure 2 is a plan of the four parts of which the
hoop or buckle is composed loosely put together ready for welding, preferably this
is done in the manner described in my Specification No. 5597 in the year 1890.
Figure 3 is a plan of the mould with the mandrels in place.
Figure 4 is an elevation of half of the mould with the mandrels in section.
Figure 5 is an elevation of half of the mould without the mandrels.
Figure 6 is an elevation of the lower part of the top tool.
Figure 7 is a transverse section of the top tool.
Figure 8 is a transverse section of the mould and shows a modification; the
section is taken in a position corresponding to that of the line a. y. in Figure 4.
a a and b b are the four parts to form the hoop or buckle-they are loosely put
together and before they are inserted into the mould they are heated to a welding
temperature.
c and d are the two parts of the mould, they are hinged together at e and also
secured by bolts and keys f. The mould so constituted has four lateral sides
and a bottom, it is open at the top, it stands upon an anvil to which it may if
desired be secured. g, g, g are three loose mandrels projecting up into the mould
through holes in the bottom.
The top tool shown by Figures 6 and 7 may be either fixed to the hammer or
separate it fits the interior of the mould and when in place fills it with the
exception of a space corresponding in form to the hoop or buckle to be welded.
In Figure 8 the mould is shown provided with renewable side pieces of steel
which I sometimes employ to render the mould more durable.
The parts shown by Figures 1 and 2 are when duly heated laid in position over
the mould and the top tool being made to descend drives them down into it.
So the weld is made good, the mandrels are then driven out and the mould.is
opened releasing the hoop or buckle.
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:
:-
Apparatus substantially as described for welding up hoops or buckles for

page_text: laminated springs; such apparatus consisting of a five sided box or die of a size
and shape to receive the rectangle and its extensions, or prolongations and loose
mandrels to enter the rectangle and between the said prolongations.
Dated this 8th day of January 1891
HERBERT WOODRUFF.