Improvements in the Manufacture of Scroll Irons for Carriage, Cart, and Waggon Springs, and in Dies to be used in the said Manufacture.
Year: 1894

page_text: Date of Application, 26th Nov., 1894-Accepted, 26th Jan., 1895
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Scroll Irons for Carriage,
Cart, and Waggon Springs, and in Dies to be used in the said
Manufacture.
I, JOHN BROCKHOUSE, of the Firm of John Brockhouse & Co., of Victoria
Works, Hill Top, West Bromwich, Staffordshire, Coach Spring 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 :-
This invention consists of the herein-described improvements in the manu-
facture of scroll irons for carriage, cart and waggon springs and in dies to be used
in the said manufacture.
Heretofore in making the said scroll irons it has been customary to stamp or
otherwise form the scroll part and the lug or eye end and then forge the strap or
base part of the scroll iron and then to heat and weld the said two parts together
and afterwards to bend the same to form the scroll and punch the holes for the
fixing bolts. Thus three or more heats were required to complete the manufacture
of the scroll iron.
According to this invention I make the scroll iron complete at one heat by
stamping a heated metal bar between dies of the form herein described, and while
the partly formed scroll iron is hot I clip off the web or fin and bend the scroll iron
to the required shape. The dies which I employ are or may be also shaped to
form prints in the strap where the holes are to be for the fixing bolts, thus ensuring
the holes in different scrolls being in exactly the same positions, which is very
important when a new scroll is required to be supplied to fix on a vehicle in place
of a broken scroll.
I will describe my invention by referring to the accompanying drawings on
which-
Fig. 1 represents a scroll iron made in accordance with this invention;
Fig. 2 is a side view and Fig. 3 is an inverted plan of the scroll iron as it
leaves the dies and before it is bent into the scroll shape, but with the web or fin
clipped off;
Fig. 4 is a sectional elevation of the pair of stamping dies which I employ for
making the scroll iron shewn by Figs. 1, 2 and 3 ;
Fig. 5 is an inverted plan of the top die;
Fig. 6 is an inverted plan of the bottom die;
Fig. 7 represents another form of scroll iron made in accordance with this
invention;
Fig. 8 is a side elevation, and Fig. 9 is an inverted plan of the said scroll iron
shewn by Fig. 7 in the form it leaves the dies but with the web or fin clipped off
and before being bent into the scroll shape.
In making the scroll iron shewn by Fig. 1 I employ a pair of top and bottom
stamping dies as shewn by Figs. 4, 5 and 6 marked repectively A and B. One of
the dies, say the bottom die B is sunk at ¹ to correspond with the under side
(shewn by Fig. 3) of the complete scroll iron, that is to say, this depression b¹
corresponds with the strap part C' the scroll proper C and the forked end C³ and
standing up from that part of the sinking which corresponds with the strap part C₁
there are two projecting centre pins d' d² which form the countersunk prints el e³
in the strap part C¹ corresponding with the holes for the fixing bolts. The other
[Price 821

page_text: die, that is the top die A, is sunk at a¹ to correspond with the upper side of the
complete scroll iron that is the part which is above the dotted line X X in Fig. 2
which corresponds to the faces of the two dies.
In stamping the scroll iron by the dies A and B I use a heated bar of iron
or steel of a section which will rather more than fill the dies this bar having a lump
forged at one end large enough to form the fork part C³. When the stamping is
removed from the dies the web or fin is clipped off and the hot stamping will then
have the form shewn by Figs. 2 and 3. This whilst hot is then bent round a block
to the well known scroll form shewn by Fig. 1.
I make the kind of scroll iron shewn by Figs. 7 8 and 9 in the same way as
above described with reference to Figs. to 6 both inclusive except that the
dies A and B have to be sunk to the shape of the bossed end C of the scroll iron
instead of being made to form the forked end C³ as above described.
It will be evident that without departing from the nature of my invention what
I have described as the top die A may if desired be the bottom die, and the bottom
die B will then be the top.
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 :-
1. The manufacture of scroll irons for carriage, cart and waggon springs, by a
pair of stamping dies which are sunk so as to form the complete scroll iron at one
heat with the prints for the holes of the fixing bolts in the strap part, substantially
as hereinbefore described with reference to the accompanying drawings.
2. The herein described improved stamping dies for the manufacture of scroll
irons for carriage, cart and waggon springs, the said dies being sunk so as to form
the complete scroll iron at one heat with the prints for the holes of the fixing bolts
in the strap part, substantially as hereinbefore described with reference to the
accompanying drawings.
Dated this 19th day of November 1894.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.