Improvements in or relating to the Manufacture of the Covers of Pneumatic Tires and similar Articles.
Year: 1893

page_text: Date of Application, 8th Aug, 1893
Complete Specification Left, 7th May, 1894-Accepted, 9th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Manufacture of the Covers of
Pneumatic Tires and similar Articles.
We, JOHN WILD of No. 6 Richmond Terrace Cox Street, Coventry and JOHN
JAMES HORNE of Chester House, Chester Street, Coventry both in the County
of Warwick Tire Manufacturers do hereby declare the nature of this invention to
be as follows :-
Our invention relates to certain appliances used in the manufacture of the covers
of pneumatic tires and other similar articles, the said appliances being commonly
known as "forms," the same being used as blocks on which to shape and construct
the said articles.
We will describe our invention as applied to a form to be used in the manufacture
of the cover of a pneumatic tire. We take a strip of sheet steel or other suitable
material of suitable dimensions and roll or draw it to a somewhat circular
transverse section but preferably with edges or flanges projecting more or less
horizontally like the Greek letter Q. The curved portion is bent more or less
nearly to the size and shape which it is desired the interior of the cover shall
possess. The strip is then rolled into a circle longitudinally, the flanged edges
lying towards the centre of the circle and more or less transversely to the plane
thereof. The circumference of the circle measures approximately the same as it
is desired the interior of the cover shall measure. To strengthen the form a
continuous strip of metal or other suitable material may be secured across the
circumferential opening or a series of struts may be placed from side to side.
The ends of the form are attached to one another by any suitable means so as to
complete the ring and, to enable a cover to be removed from the form after having
been made up thereon, the said form is constructed of two or more pieces which
may be hinged or otherwise attached to one another so that one or more of them
may, when required, be moved in towards the centre of the circle preferably
without departing materially from the plane thereof. Scarf joints may be used
and in this case if a continuous strengthening piece or pieces be used we prefer to
extend the same so as to close the ends or faces of the joints. In all cases we
arrange that there shall be no material projection beyond the outer curved surface
of the form.
Our form is used in a similar way to those heretofore in use and it may be
adapted by suitable modifications to suit other circular articles than the covers of
pneumatic tires. If desired for further convenience in using the form, it may be
made up into a rotatable wheel.
Dated this 5th day of August 1893.
W. B. MAXFIELD,
Applicants' Agent:
COMPLETE SPECIFICATION..
Improvements in or relating to the Manufacture of the Covers of
Pneumatic Tires and similar Articles.
We, JOHN WILD, of Clarendon Street, Earlsdon near Coventry late of
No. 6 Richmond Terrace, Cox Street, Coventry and JOHN JAMES HORNE of
Chester House, Chester Street, Coventry both in the County of Warwick, Tire
[Price 8d.1

page_text: Manufacturers, 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 :-
Our invention relates to certain appliances used in the manufacture of the covers
of pneumatic tires and other similar articles the said appliances being_commonly
known as "forms," the same being used as blocks on which to shape and construct
the said articles. The object of our invention is to produce a form that shall be
cheaper, lighter and generally more convenient than those made of wood and
cast-iron which hitherto have been used.
We shall describe our. invention as applied to a form to be used in the manu-
facture of the cover of a pneumatic tire. We take a strip of sheet steel or other
suitable material, of suitable dimensions and roll or draw it to a somewhat circular
transverse section but preferably with edges or flanges projecting more or less
horizontally like the Greek letter Q. The curved portion is bent more or less
nearly to the size and shape which it is desired the interior of the cover shall
possess. The strip is then rolled into a circle longitudinally, the flanged edges
lying towards the centre of the circle and more or less transversely to the plane
thereof. The circumference of the circle measures approximately the same as it
is desired the interior of the cover shall measure. To strengthen the form, a
continuous strip of metal or other suitable material may be secured across the
circumferential opening or a series of struts may be placed from side to side.
The ends of the form are attached to one another by any suitable means so as
to complete the ring and, to enable a cover to be removed from the form after
having been made up thereon, the said form is constructed of two or more pieces
which may be hinged or othewise attached to one another so that one or more of
them may when required be moved in towards the centre of the circle preferably
without departing materially from the plane thereof.
Scarf joints may be used and in this case if a continuous strengthening piece or
pieces be used we prefer to extend the same so as to close the ends or faces of the
joints. In all cases we arrange that there shall be no material projection beyond
the outer curved surface of the form.
And in order that our invention may be well understood we append a sheet of
drawings showing the general form and arrangement of the parts of our invention
as we prefer to carry it out when constructing a form for use in making the covers
of the well known "Fleetwood" pneumatic tires but modifications may be made
without departing from the spirit of our invention.
Similar numerals refer to similar parts throughout the several views.
Figure I shows a side view in elevation of a form constructed according to our
invention and ready for a pneumatic tire cover to be made thereon.
Figure II shows a similar view of the said form but with a part moved into the
position which it occupies when the said cover is to be removed from the form.
Figure III shows a transverse section of the form on the line 1-1 in Figure I.
The strip of sheet steel 2 is rolled or drawn to the transverse section shewn
in Figure III and rolled to a radius as shewn in Figures I and II with a curved
part 2 and projecting flanges 3, 4. The dimensions of the section and the radius
of each form are made to suit the particular dimensions of the tire covers to be
constructed thereon, a separate form being required for each size of tire.
A second strip 5 about half the length of the first (2) is similarly rolled or
drawn and rolled and the two strips 2 and 5 when put together as hereinafter
described form a complete circle. Both strips are strengthened by the addition of
two other strips 6 and 7 which are soldered to the flanges 3, 4 of each respectively
and two principal parts A and B are thus constructed. One end 15 of A and one
end 16 of B are preferably closed by plates soldered flush into them and these
two ends are jointed together by a horizontal hinge 8 the axis of which lies below
the joint and at right angles to the plane of the form.
The other ends of A and B are stepped as shown at 10, and 11, Figures I and II
respectively and the end 11 is closed by suitable plates soldered flush into it, but

page_text: the end 10 is left open and the adjacent part of the strip 6 is cut away to allow the
movement of the part B on the hinge 8, though the part A may be closed further
in if desired.
The form and construction of the ends 10, 11 prevents the parts B projecting
beyond the outer curved surface and the other parts of the form are also arranged
so that nothing shall interfere with the smoothness of the cover made up on a form
constructed according to our invention. Alternate and alignable guides 12, 13.
are fitted at and below the ends 10, 11 and at right angles to the plane of the
form so that the joint may be fixed by a wire pin 14 in the well known manner.
By placing the guides 12 slightly projecting, as shown in Figure II they act as a.
spring catch to the end 11, and hold the parts A and B in position temporarily
when required. The hinge 8 and guides 12, 13 are preferably made separately
from the strips 6 and 7 and are soldered thereto afterwards. The part B is so
proportioned to the part A that when the former is moved on the hinge 8 it shall
so reduce the effective perimeter of the form as to allow the ready removal of the
cover therefrom, but in so doing shall not require to pass so much within the
part A as to weaken it (the part A) by the cutting away thereof necessary for
such passage. The flanges 3, 4 which act as guides for the edges of the cover,.
may be provided with holes or perforations 17 to receive the studs employed on
the wires of the "Fleetwood" tire and in other details the form may be adapted
to suit other pneumatic tires than the said "Fleetwood." The form is used in a
similar way to those heretofore in use and it may be adapted by suitable modifi-.
cations to suit other circular articles than the covers of pneumatic tires.
If desired for further convenience in using the form, it may be made up into a.
revoluble wheel, connecting the form itself to a centre or hub by means of a disc
or the like or by spokes, such connection being made movable or detachable in
any suitable manner so as not to interfere with the action and use of the.
said form.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A circular form, for use in the manufacture of the covers of pneumatic tires.
and similar articles, made from sheet steel or other suitable material and having
one or more of its parts so attached to the other or others that such part, or one or
more of such parts, may, when required, be moved in towards the centre of the
circle, substantially as and for the purpose set forth.
2. In a form, for use in the manufacture of covers of pneumatic tires and similar
articles, the combination of the parts A and B, the hinge 8, the stepped ends 10,.
and 11, and the sleeves 12, 13 and the pin 14, or the equivalents of any or all of
them, substantially as herein described and illustrated.
3. The improved form, for use in the manufacture of the covers of pneumatic:
tires and similar articles, substantially as herein described and as illustrated.
Dated this 4th day of May 1894.
WILLIAM BESTWICK MAXFIELD,
19, Bowling Green Street, Leicester, Applicants' Agent.