Improvements in the Manufacture of Wheels for Reaping, Mowing, and other Machines, and in Apparatus therefor.
Year: 1889

page_text: Date of Application, 16th Oct., 1889
Complete Specification Left, 15th July, 1890-Accepted, 16th Aug.,
1890
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Wheels for Reaping, Mowing,
and other Machines, and in Apparatus therefor.
ROBERT HALSTEAD, of Greenfield Terrace, Wrexham, in the County of Denbigh,
Foreman Moulder, do hereby declare the nature of this invention to be as follows :-
My invention relates to the manufacture of driving and other wheels for reaping,
mowing and other machines, and especially to wheels of that class having straddled
arms or spokes and a boss cast thereon.
The method heretofore adopted for forming the bosses has been to employ a core
for the outside. According to my invention I dispense with the use of a core and
employ a pattern having a removeable ring between the spokes so that the boss
can be cast in ordinary moulding sand. 1 thus make wheels which are cleaner and
better than those made in cores outside the bosses.
Dated the 16th day of October 1889.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Wheels for Reaping, Mowing,
and other Machines, and in Apparatus therefor.
I, ROBERT HALSTEAD, of Greenfield Terrace, Wrexham, in the County of Denbigh,
Foreman Moulder, 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:-
My invention relates to the manufacture of driving and other wheels for reaping,
mowing and other machines, and especially to wheels of that class having straddled
armis or spokes and a boss cast thereon.
The method heretofore adopted for forming the bosses has been to employ a core for
the outside.
According to my invention I dispense with the use of a core and employ a
special pattern and a removable ring between the spokes, so that the boss can be
cast in ordinary moulding sand. I thus make wheels which are cleaner and
better than those whose bosses are made in cores, and which thus require little or no
trimming.
To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawing, in which-
Figure 1 is a central vertical section through a moulding box represented as filled
with sand and containing a wheel pattern constructed according to my inven-
tion; and,
Figure 2 is a plan of part of the same with the upper box removed.
Figures 3 and 4 are a plan and transverse section respectively of the removeable
ring.
a, b indicate the lower and upper parts respectively of the moulding box, and
c indicates the wheel pattern, which pattern has the boss and portions of the spokes
severed from the other parts of the wheel at d; the said boss is also made in two
parts e, f respectively, dowels or pins g being arranged between them in the ordinary
manner to ensure the two parts being placed in their proper relative positions.
h is the removeable ring which I place between the spokes, which ring, as shewn
in figures 3 and 4, is provided on its upper and lower edges with notches i, i in

page_text: which the spokes lie. The rim of the wheel is also advantageously formed in two
parts k, l, the joint being at m.
The method of moulding a wheel from a pattern constructed as hereinbefore
described is as follows:-that is to say, the wheel pattern, with the part of the rim
removed, is bedded upon a suitably formed plate, upon which the lower part a of the
moulding box is placed upside do; the ring is also placed in position between
the spokes, as shewn in the drawing. The box is then filled with sand and rammed
up in the usual manner, except that the portion of the mould within the ring and
around the boss is jointed, so that the said ring with the sand within it can be
lifted when the box is turned over. The box is next turned over into the position
shewn in figure 1 and the sand jointed, if necessary, around the pattern and level
with the top of the ring, the upper box is then placed on the lower box and rammed
up. After the upper box has been lifted, the first operation in withdrawing the
pattern consists in removing the part of the boss, the ring with the sand which
it contains is then lifted, and lastly the lower part e of the boss is drawn out of
the sand it being understood that the parts k, 1 of the rim of the wheel can be
drawn out either before or after the removal of the boss as desired. After the
pattern has been entirely removed the spokes corresponding with those secured in
the boss e of the pattern are placed in position in the ordinary manner and the
ring with the sand which it contains is then again placed in position. After this
has been performed the ring his itself removed so as to leave the sand within it
intact after which the spokes secured in the part of the boss are placed in position.
The core for the axle can then be introduced and the box closed.
:
:
It is obvious that my invention can be applied to other kinds of wheels than that
shewn in the drawing.
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 wheels of the kind herein before referred to, directly in
the sand without the use of a core around the boss, substantially in the manner
.described.
2. In the manufacture of wheels of the kind herein before described, the use of a
ring adapted to be placed between the spokes of the pattern, substantially in the manner,
and for the purpose, described.
3. The manufacture of wheels, substantially in the manner hereinbefore described
and illustrated in the accompanying drawing.
Dated the 15th day of July 1890.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.