Improvements in Bolt-heading Machines.
Year: 1890

page_text: Date of Application, 31st July, 1890-Accepted, 4th Oct., 1890
COMPLETE SPECIFICATION.
Improvements in Bolt-heading Machines.
I, EDWARD HOLLINGWORTH, of Dobcross Loom Works, Dobcross, in the County of
York, Loom Maker, 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 said invention having been communicated to me
from abroad by George Webb, of Pawtucket, Rhode Island, one of the United States
of America, Engineer):-
:-
This invention relates to machines for forming heads of bolts from a hot bar of
metal. The formation of the bolt head is accomplished by a reciprocating die or
raminer which strikes the end of the hot bar of metal, but the sides of the bolt head
are shaped by means of forging dies or hammers. These forging dies or hammers
are mounted on slides working in grooves or guides, formed in the arms or framework
of the crosshead of the machine. The metal bar upon which the head is to be formed
is highly heated previous to being forged, and the dies or hammers which operate
upon the heated metal would therefore be injuriously heated, were it not that jets or
sprays of water are being continuously discharged upon them, for the purpose of
reducing the temperature thereof. As the hot bars of metal are rapidly struck by the
hammers and forging dies, scales fall off the metal, as is common when forging such
scales fall into and mingle with the water, passing away with the said water, and
entering into the grooves or guides wherein the slides travel, thereby wearing away
and otherwise injuriously affecting both the slides and grooves by the friction caused
by the said scales. To prevent the scales and the water which has been used to cool
the hammers getting into the grooves and slides is the object of my invention, and this
I accomplish by making the usual tubular guard surrounding the heated forging
instruments with a box like extension in front, formed at the bottom with a convex
water trough, made to extend laterally on each side beyond the box portion. I also
employ a convex trough forming part of, or separately secured upon the upper end
of the lower slide of the crosshead, which trough is so located or in such a position as
to receive the scales and used water discharged from the water collecting box, and
in turn deliver it upon sloping surfaces formed in the crosshead, or into a recess
in the said crosshead, as hereinafter more fully described.
Such being the nature and object of my invention, I will now proceed to describe
the same more fully, and for that purpose make reference to the accompanying sheets
of drawings, wherein
Figs. 1 and 2 are respectively a front and side elevation of my improved water box
and drip;
Figs. 3 and 4 are respectively a front and side elevation of the trough for conveying
away the scales and used water;
Fig. 5 is a front elevation of the crosshead of a bolt heading machine with my
improved water box and trough in position thereon;
Fig. 6 is a vertical section on line 1-2 of Fig. 5, the several hammers and dies
being shewn in side elevation;
Figs. 7, 8, and 9 shew modified forms of my invention.
Referring to the drawings, A represents the crossbead of a bolt heading machine,
the four radial arms of the said crosshead being grooved for the reception of the
slides B which have a reciprocatory motion imparted to them by the levers C operated
in any well known manner. Each slide B carries a bammer D, adjustably secured to
the said slide B by the screw bolt a. A screw-threaded rod b passes through a nut or
screwed boss d projecting from each reciprocating slide B, such screw threaded rod
being adjustable so that its inner end bears against the outer end of the dies D, all
DQ1

page_text: arranged and working in the ordinary manner, and forming no part of my invention.
The usual reciprocating rammer or upsetting die is shewn at E and a portion of the
metal on the under surface thereof is cut away as shewn at e, leaving an angle at f so
as to form at this point a water drip. Instead of the usual tubular guard m which
surrounds the reciprocating die B being made in the ordinary way, I add thereto a
guard of peculiar construction; the rear portion is marked m and is tubular in
section, but the front end is extended at n and comprises three rectangular sides,
giving to it a box-like appearance, whilst the lower portion of this extended part n
has a convex channel or drip box o projecting downward below the under surface of
the tubular part n, both opposite ends of which are open as seen in Figs. 1 and 2.
The central portion of the crosshead A is cut away to make room for this extended
guard and drip box; the crosshead is also cut away as shewn at s so as to form convex
surfaces terminating at each end with projecting dripping points t over which the
water and scales flow away and get clear of the machine. On the top of the lower
slide B, which is made convex, secure a convex trough G, details of which are shewn
in Figs. 3 and 4. This convex trough is formed with ears by means of which it is
fastened to the slide B.
The water used to cool the several reciprocating hammers and die to prevent them
overheating is discharged in a series of jets or sprays, (not shewn in the drawing)
such water, as well as the scales of iron struck off by the operation of forging,
collecting in the said central tubular guards m and n, and passing therefrom into the
drip box o, thence falling into the trough G and afterwards upon the convex
surfaces s, and finally passing off the drip points t onto the ground or into a
receptacle placed to receive it. By examining drawing Fig. 6 it will be observed
that the trough G is wider than the drip box o so as to ensure that all the matter
discharged from the said drip box shall fall into the said trough G. The water
received at the end of the reciprocating die B gravitates to the angle 'f and drops
therefrom into the tubular part of the guard m. A projection prevents the water
running the wrong way. The length of the tubular portion m of the central guard
is equal to the thickness of the crosshead A, as illustrated in Fig. 6, and the box
portion n extends from the front of the said crosshead into the open space left by the
four slides B as shewn in the drawings.
In Figs. 7, 8, and 9 1 have shewn at G' a modified form of water trough. It is
formed convex as in the previous case, having a vertical projecting part w, but the
opposite side is turned downward as shewn at y, so as to conduct the water falling
thereon from the drip box into a recess H formed in the crosshead, from whence the
water may flow or pass from the machine to either side thereof.
By the use of the drip box o, collecting trough G, and the inclined surface
3, the
water which has been used to cool the hammers and die, together with the scales, are
all collected and taken away, so that they cannot get into the grooves and slides of the
machine and damage them, as is now the case.
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 :-
Firstly. In a bolt heading machine, the combination, with a grooved crosshead A
and hammer slides B, of the central compound guard m n, having a drip box o, all
arranged substantially as shewn and for the purpose specified.
Secondly. In a bolt heading machine, the combination with a grooved crosshead A,
slides B, hammers D, of the central compound guard mn, having a drip box o̟, and
the convex trough G placed to receive and conduct away the contents discharged from
the said drip box, all arranged substantially as and for the purpose specified.
Thirdly. In a bolt heading machine, the combination, with a grooved crosshead A,
formed with sloping surfaces s and dripping edges t, together with hammers D,
slides B, central guard m n, having the drip. box o and the convex trough G,
substantially as described.

page_text: Fourthly. The combination of the crosshead A, having a central aperture, the
reciprocating die E, formed with a dripping edge f, and the central guard m n
together with the drip box o, substantially shewn and specified.
Fifthly. The combination of the grooved crosshead, having the recess or channel H,
the hammers D, slides B, the central guard m n with drip box o, the trough G', formed
with a projection w and the rear part y bent down, such said trough G' being fastened
on the top edge of the lower slide B and adapted to discharge the drip received from
the box o into the recess H, substantially as described and shewn in Figs. 7, 8, and 9.
Dated this 29th day of July 1890.
TASKER & CROSSLEY,
Halifax and Huddersfield, Agents.