Improvements in the Manufacture of Corner Mounts for Fenders and Curbs.
Year: 1896

page_text: Date of Application, 7th May, 1896-Accepted, 13th June, 1896
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Corner Mounts for Fenders
and Curbs.
I, GEORGE ERNEST LANCELOTT, of 49, Tenby Street North, in the City of
Birmingham, 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:-
This invention has reference to the manufacture of corner mounts for fenders
and curbs and consists in making the same in the manner hereindescribed from
ductile sheet metal by means of suitable tools and dies. By my invention the cost
of manufacture of the said corner mounts is considerably reduced and they
bave a better appearance and finish than when made of the cast metal as
heretofore.
I will describe my invention by referring to the accompanying drawings on
which Fig. 1 is a side elevation of my improved corner mount when finished;
Fig. 2 shews a plan of the same with part of the front and end of the fender
indicated by dotted lines; Fig. 3 shews a sectional elevation of the same on
a line X X of Fig. 2; Fig. 4 shews the blank from which the corner mount is
made; Fig. 5 shews the same in the next stage of manufacture; Fig. 6 is a
sectional elevation of the bottom die for raising the blank, one of the blanks being
shewn in position; Fig. 7 is a plan of the said bottom die with the blank removed;
Fig. 8 is a side elevation of the top die which forces the blank into the bottom die;
Fig. 9 is an inverted plan of the said top die; Fig. 10 is an inverted sectional
elevation of the said corner mount after leaving the said die; Fig. 11 is a plan
looking at the inside of the same; Fig. 12 is a front elevation and sectional side
elevation of the top clipping tool and Fig. 13 is a plan and sectional side elevation
of the bottom clipping tool used for cutting away the superfluous metal as shewn
by dotted lines in Fig. 10; and Figs. 14 and 15 shew an elevation and plan of how
I use a milling cutter for finishing the edges of the said corner mount, so that they
will properly fit the fender mouldings.
In carrying out my invention I first form a brass or other ductile sheet metal
blank A of about the shape shewn by Fig. 4 somewhat like a sector of a circle and
having a projection a' at the smaller part of the size and shape to form the angular
clip a² as which, as shewn in Figs. 2 and 3, projects down inside the corner of the
fender or curb to strengthen the same. The part a' of this blank is then by means
of suitable dies raised into the shape shewn by Fig. 5 with the parts a² a sloping
away from each other at an angle of about 45 degrees the apex a having been also
raised slightly above the level of the blank. The blank formed as shewn in Fig. 5
is now placed on the bottom die B (Figs. 6 and 7) this latter having a recess b¹
formed in its upper surface for receiving the blank and being also made with a
recess at corresponding with the outside shape of the required corner mount and
also having a central angular projection corresponding with the shape of the
corner clip a² a³. There are two parallel grooves 65 in the face of the die to
take the edges of the parts a² a³ of the blank. The top die C is as shewn made of
a shape to correspond with the recess 63 and projecting part 6 of the bottom die B.
When the top die C descends it forces the blank into the recess b³, the sloping
sides a a³ of the projection a¹ ultimately assuming almost a vertical position and
fitting against the projection 6. The blank will now have the shape as represented
by Fig. 10. It is then placed in another die which is practically of the same shape
as B and operated on by a top die which is practically the same shape as C except
that these finishing dies are shaped so as to bring up the angles and exact form of

page_text: the corner which when removed from this die will have the form as represented
by Figs. 10 and 11.
When the corner mount is removed from the finishing dies it will be found that
there is a certain amount of burr along the edges as a a' as which is removed by
means of a rotary milling cutter H as shewn in Figs. 14 aud 15 which is made of
a shape to match the outside of the section of the moulding on which the corner
mount is required to fit. The corner mount A is, whilst being operated upon by
the rotary cutter H, held in an inverted position in the blank F which is recessed
to correspond with the corner mount and has an upwardly projecting part f' to fit
into the outside of the angular clip a a³. The burr on the edges a a has to be
removed in a similar manner by a rotary cutter made of the opposite hand to that
shewn in Figs. 14 and 15. After the burr has been removed as aforesaid there
will still be a small piece of superfluous metal at a and at a (see Fig. 11) which
has to be removed so as to leave the finished corner mount of the shape indicated
by the dotted lines in Fig. 11. This is effected by the clipping tools shewn
by Figs. 12 and 13 which consist of a bottom tool D having a recess d' in which
the corner mount will fit in an inverted position and also having two holes d³ d³
which at d d are shaped to correspond with the finished shape of the corner
mount. The top tool E has two projecting punches el e corresponding with the
holes d d of the bottom tool D and when this top tool descends it clips off the
superfluous metal a a' leaving the corner mount finished to the shape shewn
by Fig. 2.
If preferred the superfluous metal a a' may be clipped off before the corner
mount is operated upon by the rotary cutters which remove the burr.
It will be understood that my invention is applicable to corner mounts of other
shapes than that shewn as for instance the corner mount may, instead of being
rounded in plan, be of an angular shape and the section may be varied to suit the
particular moulding with which the corner mount is used as my invention is
applicable to the manufacture of corner mounts of all shapes for fenders and
curbs.
I am aware that prior to my invention corner mounts for fenders and curbs have
been raised from sheet metal blanks but owing to the manner in which these corner
mounts have been made they have not been provided with the downwardly
projecting clip a² as for the inside corner of the fender or curb which by my
method of manufacture I am enabled to make in a piece with the corner mount
itself.
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 improved method of making a corner mount for a fender or curb from a
sheet metal blank, consisting in first cutting out a sheet metal blank of the shape
substantially as shewn by Fig. 4 with the projection a', then raising the sides of
the said projection so as to slope at a2 a³, and then raising the blank by dies such
as C and D which raise the body of the blank into the shape of the required
corner mount and turn up the said projection a¹ to form the downwardly projecting
clip for the inside corner of the fender or curb substantially as herein-
described.
2. Making corner mounts for fenders and curbs from sheet metal blanks in
the manner substantially as hereindescribed and illustrated by the accompany
drawings.
Dated this 5th day of May 1896.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.