Improved Manufacture of Canvas Fabric for Pneumatic Tyres and Apparatus or Appliances therefor
Year: 1899

page_text: "
PROVISIONAL SPECIFICATION.
Improved Manufacture of Canvas Fabric for Pneumatic Tyres and
Apparatus or Appliances therefor."
I, EDWARD LYCETT, of 161 Adderley Street, in the City of Birmingham.
Manufacturer. do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved manufacture of canvas fabric for pneu-
matic tyres and apparatus or appliances therefor.
For the purpose of this invention, I make by weaving a web or width of fabric
of straight threads of linen cotton, or other material all of the same length as
the warp and cross weave the weft transversely upon what is known as twill
weaving, and in conjunction therewith I make rather wide selvedge edges in
threads of linen, cotton or other material somewhat more closely beaten up for
stiffness, the result is the production of an arched like fabric transversely and
of bridge or circular sweep like formation longitudinally as the weaving pro-
gresses, as to form in a given length a ring shaped double winged web of which
the centre threads serve as the larger outer periphery and the selvedge edges
the inner or smaller periphery.
As a pneumatic cycle cover such as when by rubber or otherwise protected or
coated and the ends overlapped and cemented, the selvedge edges lie in the rin
of the wheel and nip close thereto from inflation of the pneumatic tube within
it if one be applied.
Two of such cover canvases can be secured together at one of the selvedge
edges with an overlap strip to form a double cover to an inflatable tube in which
casc one of the selvedge edges would be enclosed for pressure in conjunction
with the other free selvedge to the rim, the fixing being without cores, wires, or
other appliances usually adapted for that purpose.
and
The apparatus or appliances consists of bellied or oval shaped rollers or guides
fitted in the loom or weaving frame, weights being employed for regulating the
tension on the respective threads over under which rollers the warp threads
are carried, the weights being proportionately lighter for the intermediate warp
threads than for the outside edge threads.
or
The warps can for the purpose of this system of weaving pneumatic cycle
covers be in sections of from, say, 4 to 10 divisions, the weft being straight
across in the usual manner.
.
1000

page_text: Improved Manufacture of Canvas Fabric for Pneumatic Tyres and
Apparatus or Appliances therefor.
I, EDWARD LACETT, of 161, Adderley Street, 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 relates to the apparatus or appliances for the manufacture of
canvas fabric for pneumatic tyres, by which a fabric of arch like shape trans-
versely and of a bridge or circular sweep like formation longitudinally is
produced.
I will describe my invention with the aid of the accompanying drawings to
which I will more particularly refer as occasion arises.
The apparatus or appliances consists of bellied or oval shaped rollers or guides
fitted in the loom or weaving frame, weights being employed for regulating the
tension on the respective threads over under which rollers the warp threads
and
or
are carried the weights being proportionately lighter for the intermediate warp
threads than for the outside edge threads.
The warps can for the purpose of this system of weaving pneumatic cycle
covers be in sections of from say, 4 to 10 divisions, the weft being straight across
in the usual manner.
A loom adapted to produce the fabric is illustrated in Figs. 1, 2, and 3, which
are respectively side, front and end elevations, portions of the loom, forming
no part of my invention, being removed for the sake of clearness.
The loom generally is arranged and constructed in the ordinary way.
Bis the warp which is divided into sections or divisions as explained above.
Four divisions b, b, b, b are exemplified in the said figures. Each of these
divisions is wound on and unwound from one of the bobbins or spools C, C, C, C
arranged in pairs, one pair being above the other. Each pair of bobbins is
revolubly mounted upon a spindle e suitably carried by the loom framing, and
for preventing the threads being drawn off too quickly a brake is applied to every
bobbin. A convenient form of brake consists, as shown, of a band passing
over a grooved or channelled guide or drum formed in one with or fixed to
the bobbin C.
For putting the requisite tension on the divisions or sections b, b, b, b various
devices may be adopted, but the one that I find very effective in practice is
represented in the figures under description. This comprises pulleys or
sheaves D . . D loosely mounted on spindles d, d, d carried by the loom
framing and pulleys or sheaves d', d', d', to which weights d², d³, d², d² are
attached. Over these two sets of pulleys or sheaves the threads are led before
passing to the back-roll E, the heddles F, F, and the shuttle beam G as shown.
The weights are so proportioned as to be greatest at the outer or selvedge
divisions and least at the centre, consequently the warp threads at the sides are
stretched more tightly than the intermediate ones with the result that the curva-
ture above described obtains. As will be apparent, the amount of curvature
depends upon the degree of tension applied to each division b and the number
of such divisions, for obviously the greater the number of the divisions the
greater will the curvature be.
As the fabric is woven, to complete its manufacture I pass it over rollers H,
H, H, which are shaped as described and which may be fixed or loosely mounted

page_text: on the loom frame as clearly shown in Figs. 1, 2, and 3, the fabric being drawn
by the ordinary means indicated at I.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I would have it
understood that 1 do not claim the use of bellied or oval shaped rollers or guides
generally, but I declare that what I claim is :-
and
1. Apparatus or appliances for the manufacture of the specified fabric con-
sisting of bellied or oval shaped rollers or guides arranged in the loom or weaving
frame over
under which rollers the fabric is carried, in combination with
weights for regulating the tension on the warp threads, substantially as
described in reference to the accompanying drawings.
or
2. In a loom or weaving frame, the use of weights for regulating the tension
on the respective threads, the said weights being proportionately lighter for
the intermediate warp threads than for the outside edge threads substantially as
and for the purpose described.
3. The apparatus or appliances for manufacturing canvas fabric for pneumatic
tyres substantially as described.
Dated this 30th. day of March 1900.
J. A. HARVEY:
Chartered Patent Agent, 3, St. Nicholas' Buildings, Newcastle-on-Tyne.