Year: 1886

page_text: Date of Application, 7th Aug., 1886.
Complete Left, 16th Apr., 1887.
Complete Accepted, 17th May, 1887.
I EDWARD BOYCE PODMORE trading as James Boyce and Son of Alcester Street
Works Birmingham in the County of Warwick General Brassfounder and Manufacturer
of Umbrella and Parasol Furniture do hereby declare the nature of this Invention to
be as follows:-
My invention consists of the method of and machinery or apparatus for manufacturing
the top notches of umbrellas and parasols herein after described. By the said method
of manufacture and by the use of the said machinery or apparatus the said top notches
are manufactured economically and with great uniformity.
I will describe my invention as applied to the manufacture of a zinc top notch for
an umbrella and as effected by the machinery or apparatus constituting part of my
invention. I take a circular disc of zinc having the diameter and thickness which it
is intended the rim or ring of the finished top notch shall have. In the centre of
this disc is a small hole. To the spindle of a lathe I attach a chuck or clamp for
holding a die or tool. The said die or tool has an internal figure the counterpart of
the external figure of the finished top notch. The disc of zinc is inserted in the
mouth of the said die or tool and is concentric with the axis of the lathe. A tool
whose axis is in the same line as the lathe axis is capable of advancing and receding
from the zinc disc in the die carried by the spindle of the lathe. The front end
of the said tool is of a size which permits it when advanced to enter the hole in the
zinc disc. The rear part of the said tool has a diameter similar to the internal
diameter of the top notch to be made. As the tool advances against the rotating disc
of zinc the shoulder of the said tool at the junction at the front end of the tool with

page_text: the rear part pressing upon the central portions of the disc forces them into the
tubular part of the rotating die and the displaced metal entering the space between
the tubular part of the rotating die and the advancing tool forms a tube of the
required length and thickness for the tubular part of the top notch. After the disc of
zinc has been operated upon it has the general figure of a top notch and is finished in
the ordinary way.
Although my invention is specially suited for the manufacture of top notches mado
of zinc yet my said invention may be applied to the manufacture of top notches of
brass and other metals or alloys having sufficient ductility to permit of the treatment
described.
Dated this Seventh day of August 1886.
W. T. WHITEMAN,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of the Top Notches of Umbrellas
and Parasols and in Machinery or Apparatus Employed in the
said Manufacture.
I EDWARD BOYCE PODMORE, trading as James Boyce and Son, of Alcester Street
Works, Birmingham in the County of Warwick, General Brassfounder and Manufac-
turer of Umbrella and Parasol Furniture, do hereby declare the nature of my
Invention and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :—
My invention consists of the method of and machinery or apparatus for manufac-
turing the top notches of umbrellas and parasols herein after described. By the said
method of manufacture and by the use of the said machinery or apparatus the said
top notches are manufactured economically and with great uniformity.
I will describe my invention as applied to the manufacture of a zinc top notch for
an umbrella and as effected by the machinery or apparatus constituting part of my
invention. I take a circular disc of zinc having the diameter and thickness which it
is intended the rim or ring of the finished top notch shall have: To the spindle of a
lathe I attach a chuck or clamp for holding a die or tool. The said die or tool has an
internal figure the counter part of the external figure of the finished top notch. The
disc of zinc is inserted in the mouth of the said die or tool and is concentric with the
axis of the lathe. A tool whose axis is in the same line as the lathe axis is capable of
advancing and receding from the zinc disc in the die carried by the spindle of the

page_text: Lathe. The front end of the said tool is of a size which permits it when advanced to
pierce the zinc disc. The rear part of the said tool has a diameter similar to the
internal diameter of the top notch to be made. As the tool advances against the
rotating disc of zinc the shoulder of the said tool at the junction of the front end of
the tool with the rear part pressing upon the central portions of the disc forces them
into the tubular part of the rotating die and the displaced metal entering the space
between the tubular part of the rotating die and the advancing tool forms a tube
of the required length and thickness for the tubular part of the top notch. After
the disc of zinc has been operated upon, it has the general figure of a top notch and
is finished in the ordinary way.
I will now proceed to describe with reference to the accompanying Drawings the
manner in which my invention is to be performed.
1. Figure 1 represents in side elevation and Figure 2 in plan, machinery constructed
according to my invention for the manufacture of top notches according to my method:
Figure 3 represents in side elevation and Figure 4 in end elevation the tubular die in
which the top notch is made and Figure 5 represents elevations taken at right angles
to one another of the pressing tool detached from the machine, the said Figures 3, 4
and 5 being drawn to a larger scale than the same parts in the machine Figures 1 and 2.
Figure 6 represents a modification of the pressing tool; Figure 7 represents the die
and tool Figures 3, 4 and 5 arranged for operating upon the zinc disc and Figure 8
represents the same after the pressing tool has advanced and the top notch has been
fashioned in the tubular die: Figure 9 represents the zinc disc; Figure 10 the partly
made top notch as it leaves the tubular die and Figures 11 and 12 show the top notch
after it has been operated upon as hereinafter explained.
The same letters of reference indicate the same parts in the several Figures of the
Drawings.
.
a is the tubular die fixed in any convenient way to the rotating spindle 6 of the
machine. The front part or mouth a² of the tubular die a has an internal figure
the counter part of the external figure of the notch ring of the top notch to be made,
and the part of the die behind the said mouth has the figure of the tube part of the.
top notch to be made. Working in the said die a is an ejecting plunger connected
to the grooved sliding collar d by a cross pin, the said pin working in longitudinal
slots e in the die; is the pressing tool fixed to the square slide working
in the bearings in the headstock of the machine. By the use of the square
slide the pressing tool is held with great steadiness and all flexure in the said tool
prevented. The shape of the tool is best seen in the enlarged views. The front
of the pressing tool f is pointed for piercing the centre of the zinc disc and its rear
part has a diameter similar to the internal diameter of the tube part of the top notch
to be made (see Figure 8). The body of the pressing tool may either consist of a
single blade as represented in Figure 5 or of three ribs or blades arranged in the
manner represented in Figure 6. The axis of the tool f is in the same line as the
axis of the rotating spindle carrying the tubular die a and by means of the lever h
the said tool can be made to advance towards and retire from the zinc disc in the
said tubular die a. The slide a carrying the pressing tool is connected by means
of the carrier i rod k and fork with the the collar d on the plunger c in the die a so
that as the pressing tool advances the plunger c retires in the die and the reverse.
In making a zinc top notch by my method of manufacture and by the use of the
machinery represented I proceed as follows:-
I take the zinc disc m represented in Figure 9 and place it in the mouth a³ of the
tubular die a and advance the point end of the pressing tool against the centre of
the rotating disc in the die. By the advance of the tool fits point end is made to
pierce the centre of the cisc and the shoulder of the tool at the junction of the point
end with the rear part pressing upon the central portions of the disc opens them out
and forces them into the tubular part of the rotating die a, the displaced metal entering
the space between the tubular part of the die and the advancing tool. A tube of the
required length and thickness for the tubular part of the top notch is thus
formed as represented in section in the die Figure 8 and detached in Figure 10,

page_text: The
the marginal part of the disc m in the mouth a² of the die being unoperated
upon and constituting the notch. ring of the top notch. As the tool f
advances and forms the top notch the plunger c retires before it in the die a.
position of the parts after a top notch has been fashioned in the die is indicated in
dotted lines in Figure 7. On withdrawing the pressing tool from the die, after the
formation of the top notch, the plunger c advances in the die a and ejects the top
notch from the said die, the said plunger taking the position represented in Figure 3.
The tubular part of the partly made top notch Figure 10 is cut of the proper length,
the fin removed and the notch ring grooved in the manner represented in Figures 11
and 12 and the top notch is afterwards finished in the ordinary way.
Although my invention is specially suited for the manufacture of top notches
made of zinc yet my said invention may be applied to the manufacture of top
notches of brass and other metals or alloys having sufficient ductility to permit of
the treatment described.
Having now particularly described and ascertained the nature of my invention and
the manner in which the same is to be performed I declare that what I claim is :-
First Manufacturing the top notches of umbrellas and parasols from discs of
zinc brass and other ductile metals or alloys by subjecting the said discs placed in a
rotating tubular die or tool to the action of an advancing pointed and shouldered
pressing tool whereby the centre of the rotating disc is pierced and the central parts
of the disc opened out and forced into the tubular part of the rotating die so as to
form the tube of the top notch, the notch ring of the top notch being formed from
the marginal part of the disc which is not operated upon by the advancing tool
substantially as herein before described and illustrated in the accompanying Drawings.
Secondly The construction and combination of the parts of the machinery or
apparatus herein before described and illustrated in the accompanying Drawings to be
employed in the manufacture of top notches according to the method claimed in the
first claim..
Dated this Thirteenth day of April 1887.