Improvements in Apparatus employed in the Manufacture of Buckles or Hoops for Laminated Springs.
Year: 1893

page_text: Date of Application, 1st July, 1893-Accepted, 26th Aug., 1893
CUMI LEIE DI DUIFICATION,
Improvements in Apparatus employed in the Manufacture of
Buckles or Hoops for Laminated Springs.
We THOMAS HURDLEY of Grange Lane Forge Grange Lane near Rotherham
in the County of York, Manufacturer, HENRY GREEN of Ecclesfield Forge,
Butterthwaite near Sheffield, in the County aforesaid Manufacturer, and
THOMPSON JOWETT of Ecclesfield Forge aforesaid Manufacturer 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:-
Our present invention relates to apparatus employed in the manufacture of those
kind of buckles or hoops for laminated springs, which have lugs or projections at
either one or both ends in order to be connected to a draw bar or bars.
These buckles or hoops are formed out of four pieces of metal, two parallel
pieces forming the sides, and two rectangularly bent pieces forming the ends.
Hitherto these pieces have either been rivetted and welded together in a
common and well known manner, or they have been placed in position in a furnace
and heated to welding temperature, when they adhere together, and have then
been placed in a die arranged with loose mandrils, shaped to suit the finished
form of the buckle or hoop, so that the four parts may be welded together by
one or more blows from a steam hammer, or other pressure applied at the top
of die. In such an apparatus however we find that the welding of the sides to
the bent end is obtained by the pressure outwards of the two end mandrils, and
we have discovered that much better and more satisfactory welds are produced
by applying a simultaneous inward and outward as well as downward pressure
upon the parts to be welded, the object therefore of our present invention is to
arrange our improved welding apparatus in such a manner that the blow from
the steam hammer or other pressure upon the upper part of the apparatus will
produce a simultaneous outward and inward as well as downward pressure upon
the whole area of the hook or buckle; to attain which we employ the mechanism
set forth in the accompanying sheet of drawings in which
Fig. 1 is a plan of a hoop or buckle presumed to be at welding heat ready to be
placed in our improved apparatus.
Fig. 2 is a cross sectional elevation taken on line y y of Fig. 4 of our improved
apparatus with the buckle or hoop placed therein, and the covers open.
Fig. 3 is a cross sectional elevation taken on line z z of Fig. 4 of said apparatus
with covers closed and in position to receive the blow from the steam hammer or
other pressure.
Fig. 4 is a plan of Fig. 2, and Fig. 5 is a longitudinal sectional elevation taken
on line a-a of Fig. 4.
Similar letters of reference denote corresponding parts in each view.
The ordinary hoop or buckle, Fig. 1, is composed of two parallel sides A and
square bent ends B, which are welded together by being heated in a suitable
furnace, and subsequently placed into a specially formed block or anvil C arranged
with a cavity or recess c¹ having tapered or bevelled sides, and also raised parts c²
at the bottom whereon the underside of the hoop or buckle rests when being
welded. The said raised parts may where preferred be made separate from the
rest of the anvil C, so that they may be removed and replaced by a different form
or size to suit the special shape of the hoop or buckle to be welded.
The upper part of the anvil C receives two pivoted or hinged covers or
forgers D, each of which is carried upon a rod or shaft e by links e, the shafts e
hearing in suitable lugs or brackets ca formed on or attached to the said anvil C.

page_text: The
Each cover D has a tapered projecting part d' which corresponds on one side to
the bevel or taper of the side of the cavity or recess c¹, and its ends correspond to
the shape required for the upper parts of the ends of hoop or buckle.
covers D are preferably arranged with handles or cranks d³, or other suitable
mechanism so as to move them as required to the relative positions shown at
Figs. 2 and 3. Suitable removable mandrils E stand perpendicularly within the
recess or cavity c¹ which latter has at its bottom suitable pockets formed for
the reception of said mandrils E. The working of our invention is as follows:-
The apparatus is placed under a steam hammer or other similar appliance in
position shown at Fig. 2 when the recess c¹ receives the heated parts A and B in
form shown at Fig. 1, then the mandrils E are placed in position and the forgers
or covers D are swung to position shown at Fig. 3, when a blow or other pressure
is applied to the top of the covers D, thereby causing the parts d' to press inwards
upon the welding sides A, simultaneously with the pressing outwards upon the
inner sides of the ends B, as well as downwards of the covers D as will be well
understood.
By this means we find that a better and more satisfactory weld is obtained
between the parts A and B than can be secured when employing apparatus as
arranged hitherto.
It will be obvious that our improved apparatus may be so modified that buckles
or hoops with only one extended end, or without any extended end, could be forged
in a similar manner.
We are aware that apparatus for welding buckles and hoops has been arranged
with mandrils fitted in a suitable die on to the upper part of which pressure from a
steam hammer or other power is applied for the purpose of welding the sides A to
the ends B of hoops or buckles, we therefore do not claim the use of such an
apparatus per se, but
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
! 1. In apparatus for forging the hoops or buckles of laminated springs, the use of
an anvil or block C, formed with a recess or cavity c', having tapered or bevelled
sides, in combination with swivelled, hinged or movable covers D, arranged to
operate substantially as described and for the object specified.
Dated this 28th day of June 1893.
H. F. BOUGHTON, M.I. Mech. E.,
Sheffield, Agent.