Improvements in Tentering Machines.
Year: 1889

page_text: Date of Application, 6th Sept., 1889
Complete Specification Left, 4th June, 1890-Accepted, 5th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Tentering Machines.
We, JOHN WEBSTER, of 9, Belle Vue Place, Leeds, in the County of York, Pattern
Maker, and EDMUND THOMPSON, of 132 West Street, Leeds in the said County,
Engineer, do hereby declare the nature of this invention to be as follows:-
In machinery or apparatus for tentering woollen, worsted and other fabrics, endless
travelling chains, one at each side thereof, provided with projecting pins for taking
into the lists or edges of the said fabrics, are employed for carrying the fabrics
into and through the machine.
The means usually employed for pressing the fabric upon the projecting pins on its
entering the machine is a rotating brush at each side, directly over each respective
row of pins, the rotation of the said brushes being induced by the travelling move-
ment of the pins or in combination thereof with that of the fabric under treatment.
These rotating brushes are very costly and subject to rapid wear, consequently require
frequent renewal, thereby entailing great expense.
The object of our invention is to press the fabric under treatment upon the afore-
said pins in a cheaper and more certain manner by substituting for rotating brushes
suitably constructed wheels of metal which may be mounted and induced to rotate in
a similar manner to the said brushes or otherwise and so that they will yield to
accommodate various thicknesses of fabric to be tentered as well as an occasional
variation in the pitch of the projecting or carrying pins which latter variation we
find is often the case. These improved wheels we form in parts with a groove on
their peripheries for the said pins to pass through freely.
On the inside of the flanges or shields of the said groove in each wheel and on
the faces thereof we form an annular recess or circular groove into which we insert a
corrugated elastic ring of ribbon-like steel or other metal capable of moving round
freely within the said annular recesses or circular grooves. The said ribbon-like
metal being made to cross say the groove on the periphery, then along one of the
annular grooves in one of the flanges, back again across the firstnamed groove, then
along the annular groove in the other flange until the ribbon-like ring is completed,
when the ends are joined together; the whole ring having the transverse parts of
the normal pitch of the projecting pins of the endless chains. The said transverse
parts of the ribbon-like ring press the fabric under treatment as it enters the machine
fairly upon the said pins, any irregularity in the pitch of the pins causes a corre-
spondingly circular movement of the corrugated ring in the grooves of the wheel
that carries it. The corrugations may be either right angular or thereabout or
circular.
The said wheels when not required to act upon the fabric can be raised so as to
clear it.
-
1000

page_text: COMPLETE SPECIFICATION.
Improvements in Tentering Machines.
We, JOHN WEBSTER, of 9, Belle Vue Place, Leeds, in the County of York, Pattern
Maker, and EDMUND THOMPSON, of 132, West Street, Leeds, in the said County,
Engineer, 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 :-
1
In machinery or apparatus for tentering woollen, worsted and other fabrics, endless
travelling chains, one at each side thereof, provided with projecting pins for taking
into the lists or edges of the said fabrics, are employed for carrying the fabrics into
and through the machine.
The means usually employed for pressing the fabric upon the projecting pins of the
before mentioned endless travelling chains on its entering the machine, is a rotating
brush located at each side thereof directly over each respective row of pins, the
rotation of the said brushes being induced by the travelling movement of the pins
(or endless chains) or in combination therewith of the fabric under treatment.
These rotating brushes are very costly and being subject to rapid wear require
frequent renewal, thereby entailing great expence.
The object of our invention is to cause the fabric under treatment to be pressed
upon the aforesaid pins of the travelling chains in a cheaper and more certain
manner by substituting for rotating brushes metallic wheels mounted and induced to
rotate in a similar manner to the aforesaid brushes or otherwise and so that they
will yield to accommodate various thicknesses of fabric to be tentered as well as an
occasional variation in the pitch of the projecting or carrying pins which variation
we find is of frequent occurrence.
These improved wheels we form in two parts or planes which when put together
their respective rims are such a distance apart as to admit of the aforesaid carrying
pins of the endless chains passing between them.
On the inside of each of the said rims and facing each other we form near their
peripheries an annular recess or circular groove in which an endless corrugated or
zigzag elastic ring of ribbon-like steel or other metal is placed so as to be capable of
moving freely around and within the said annular recesses or circular grooves to
accommodate any variation in the pitch of the carrying pins previously referred to.
The end portions or the bends of the ribbon-like corrugated or zigzag metal
ring may be either right angular or circular for taking into the circular or annular
grooves of the respective parts of the wheel and the straight portions of the said
ribbon-like metal ring cross the peripheric groove between the two parts or rims of
the wheel and are of the same pitch or a multiple thereof as the projecting pins of
the carrying chains and press the fabric under treatment upon the said pins as it
enters the machine. When the character or texture of the material under treatment
is such as not to require to be pressed upon the carrying pins, means are provided
for readily raising and fixing the wheels clear of such fabric.
In the annexed drawings Fig. 1, is a plan. Fig. 2, a side elevation and Fig. 3. a
front elevation of the improvements according to our invention. Similar letters
refer to like parts in all the Figures. Fig. 4 shews to an enlarged scale a portion of
the corrugated or zigzag ribbon-like metal ring with bent ends circular, and Fig. 5,
shows the same with rectangularly bent ends 2-a, is one of the chain boxes or races
of a tentering machine in which the endless chains b, travel, c, are pins in the latter
for carrying the piece or fabric through the machine, d, is a standard, one being
fixed upon each of the chain boxes a, e, is a sliding bush therein and held some
what elastically by the cap d'and spring f, g, a stud carried in a vertical slot e¹,
in e, h, a pressure wheel mounted freely upon the stud g,-i, i, are circular grooves
on the insides of the rims thereof,-j, the corrugated or zigzag metal ring within the
said grooves. k a nut for fixing the stud 9, in any required position, 1, a lever

page_text: mounted on the fulcrum m, (the stud 9, passing through it) by means of which the
stud 9, and the pressure wheel h, are raised as above referred to.
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 :-
In combination with the usual carrying chains in tentering machines, the improved
pressure wheel h, above each chain, with the corrugated or zigzag endless ribbon-like
inetal ring j, free to rotate in the grooves i, i, of such wheel, the whole constructed,
arranged and operating substantially as described for the purpose specified.
Dated this 3rd day of June 1890.
Witness,
THOS. E. CRAVEN, Fel. Inst. P.A.,
24, Victoria Chambers, Leeds.
JOHN WEBSTER.
EDMUND THOMPSON.