Improvements in Machinery for Stretching and Brushing Sized Hanks of Yarn or other Fibrous Materials.
Year: 1896

page_text: Date of Application, 30th Dec., 1896-Accepted, 13th Feb., 1897
COMPLETE SPECIFICATION,
Improvements in Machinery for Stretching and Brushing Sized
Hanks of Yarn or other Fibrous Materials.
1 JOHN EDWARD PRESTWICH, of Farnworth, near Bolton, Lancashire,
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 :-
The improvements relate to machinery for stretching and brushing sized hanks
of yarn or other fibrous materials, and refer more particularly to such machinery
for this purpose as is described in Specification Number 4534 of 1889, and the
improvements have for object to obtain greater efficiency in operation, as well as to
provide menus for automatically stopping the apparatus after each bank is
sufficiently, stretched and brushed."
In order that the invention may be more readily understood, I will refer to the
accompanying.sheet of drawings, wherein Fig. 1. is a side view, partly in section,
and Fig. 2. an end view, of a portion of a hank stretching and brushing machine
provided with apparatus according to my improvements. Most of the mechanism
which is not essential to the explanation is omitted for the sake of 'clearness..
The same letters indicate corresponding parts wherever they occur.
Hitherto it has been the custom, with machines of the character desoribed in
Specification No. 4534 of 1889, to employ stretching rollers formed with plain,
cylindrical surfaces, against which the yarn or fibre to be stretched is brought in
close contact. As a result, it is frequently found in practice that the sized yarn or
fibre tends to adhere to the metallic or other surfaces of the rollers, and a tearing
or entangling of the fibres is brought about, to the great deterioration of the hank.
There is likewise a tendency for the sides of the hank, when left slack by the lift
of the falling roller, to approach too closely, whereby fibres are liable to be trapped
by passing too far round the surface of such roller.
To obviate the foregoing drawbacks, and to effect this part of my improvements,
1 form or provide the stretching rollers a. b. with a suitable number of ribs, teeth,
corrugations or other projections al which may be of metal, wood or other
suitable material, and may be caet with,. formed in or upon, or otherwise attached
to the rollers. These ribs, teeth, corrugations or other projections a' b' may be
of any convenient form, both in cross section and in plan formation, and may extend
along the rollers in a direction parallel to the bearing shafts c. d. as shown, or
diagonally, spirally, or in any other convenient manuer. Likewise they may
extend unbroken from end to end of such rollers, or not, as desired.
By this means, the surface of contact presented by each roller is greatly reduced,
and is of a broken character, enabling a hank e. to be operated upon with less
langer of fibres sticking to the rollers..
To prevent the hank e. from passing too far round the roller b. I attach to any
convenient part of the inner brush-bar y. a guard rod or projection h. which, as the
rush lever n. is actuated by the crank -aud' by preference at about that portion
of the stroke when the roller b. lifts and falls-presses against one side of the
ank as shown, and pushes the same away from the said roller b.
The brushes/g' may be formed in the ordinary manner, if desired, but I prefer
so form them that the bristles present a convex surface; whereby the pressure

page_text: of such brushes upon the hank of yarn or other fibre is more equal throughout the
contact.
To automatically stop the machine when a bank is sufficiently brushed, I provide
apparatus as follows:-
Upon the machine frame o. I mount a support or bracket p. carrying a ratchet
wheel 9. which may be operated in any convenient inanner, through the pawl r,
but, in the example shown, is actuated by the lever s, which receives motion from
the brush bar, carrying a fork or bracket t, within which the lever 8. may
slide. u. is an ordinary stop or catch pawl, as will be well understood.
The ratchet wheel. q. is divided into a number of teeth corresponding with
the number of revolutions of the cranks k. l. required for the treatment of each
hank, and is provided with a nog or projection v. which, once in every revolution
of the ratchet wheel, comes in contact with a lever w, (fulcrumed upon the
framing o) whose other extremity w', in the working position, as shown, forms
a temporary stop, to prevent the strap fork moving the strap from the fast.
pulley i. on to the loose pulley j.
As the ratchet wheel revolves, the nog v. pushes forward the lever w, and raises
the end from in front of the lip on the fork bar ., leaving the bar : free to
be actuated by the weight y. and connection y' (or by equivalent means), and
thus to move-the-strap fork on to the loose pulley. j. to stop the machino.
A band lever z. and suitable connection may be employed to readjust the fork
bar to the operating position when necessary. p' is a gong or sounder, to
automatically announce the stoppage of the machine to the attendant; and in
the case shown, is struck by a spring hammer p2 having a lever leg which is
actuated by a nog. q' on the inner side of the ratchet wheel; but neither the
hand lever nor the automatic gong apparatus form any part of this my present
invention.
!.
Variations in detail may be made, such as in the design, size and material of the
various parts, without departing from the peculiar character of the invention.
Having now particularly described and ascertained the nature of iny said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In machines, of the character indicated, for stretching and brushing sized
hanks of yarn or other fibrous materials, and combined therewith, stretching rollers
formed or provided with ribs teeth, corrugations or other projections for the
purpose and in manner substantially as herein shown and described.
2. In machines of the character indicated for stretching and brushing sized
hanks of yarn or other fibrous materials, and combined therewith, a guard-rod or
projection connected and moving with the brush operating on the inner side of the
hank for the purpose and in manner substantially as herein shown and described.
3. In machines of the character indicated for stretching and brushing sized hanks
of yarn or other fibrous materials, and combined therewith, apparatus for
automatically stopping the machine when a hank has received a predetermined
an ount of stretching and brushing, in manner substantially as berein shown and
described.
Dated this 29th day of December 1896.
WILLIAM GADD, C.E.,
64 Barton Arcade, Mauchester, Agent...