Improvements in Apparatus for Drawing the Weft Thread or Yarn from a Woven Cloth or Fabric.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Drawing the Weft Thread or Yarn
from a Woven Cloth or Fabric.
We, MIRAN MOURADIAN of Dickinson Street, Manchester, in the County of
Lancaster, Merchant, and RALPH CLEGG, of Wellington Place, Longsight,
Manchester, aforesaid, Mechanical 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 :-
This invention relates to improvements in the apparatus for which the said
Mihran Mouradian obtained Letters Patent No. 5896 of 1888 and is designed with
the object of simplifying the machine and rendering it easy to change and adjust
for cloth of different quality with varying numbers of picks per inch.
ft will be fully described with reference to the annexed drawings.
Fig. 1, is a back clevation.
Fig. 2, plan.
The framing A the feed rollers B the reel D the movable blades E and the
fixed blade F are constructed in a similar manner to those described in the
Specification of the former Patent.
The first part of this invention relates to improvements in the mechanism for
operating the movable blades E. These blades are mounted as before on a stud
or shaft and held up to the fixed blade F by a spring g. Instead however of
operating them by a swinging link moved to and fro as the machine works I now
dispense with any connection between the blades E and the driving shaft C and
connect to each of the blades an upright hand lever or handle so that either can
at any time be moved independently of the other. The hand lever H is affixed
to the shaft G of one blade and the hand lever H₁ is connected to the lever / on
the other shaft G by the connecting rod h¹ running across the machine.
The
arms e on the lower side of the brackets by which the blades E are carried serve
to stop the movement of the blades in either direction and the springs e' raise the
blades when depressed.
The second part of the invention relates to the change mechanism for regulating
the speed of the roller and consequent feed of the cloth. The roller B is rotated
by a worm on the end of shaft i which at the other end carries a ratchet wheel I
actuated by a pawl. On the shaft C' is placed a small eccentric J which gives a
reciprocating movement to an arm or rod K pivoted at to a swinging lever L.
The swinging lever L pivoted to an arm M keyed on one end of a short
shaft m upon the other end of which is affixed the bevel wheel N, and as it swings
to and fro it works in contact with the bell crank lever O having at its other
end the pawl o which engages with and gives motion to the ratchet wheel I.
The throw of the lever Ŏ and ratchet o is regulated by the relative position
thereto of the arm M which is raised and lowered by turning the wheel N and
shaft m.
The wheel N is moved backwards and forwards by the bevel wheel P
on the vertical shaft p on the upper end of which is a graduated disc R working in
conjunction with an index pointer r. The graduations on the disc correspond with
the quality of the cloth and the number of picks per inch so that by setting the
disc R to the pointer the lever M is raised to actuate the ratchet wheel I at
the proper speed to give the required feed to the roller B.
r
The third part of the invention refers to the mechanism which draws out the
weft yarn. It is found that a vibrating movement is required to be given to the
thread to loosen it and this is effected by a cam wheel S rotating against a bowl
or tappet s on the thread guide T. To increase the length of the thread the
guide T is carried out beyond the reel D and rests in a supporting ring T. As
H1

page_text: the shaft C rotates a vibrating movement is imparted to the thread which causes
it to be drawn out of the cloth without breaking. The reel D. is actuated by the
bevil wheels d'on the shaft C" and the counting mechanism by the worm d' which
indicates on the dial U the number of yards wound upon the recl. V is a bell
which is struck by the hammer when 120 yards have been wound upon the reel.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, we declare that what
we claim is:
"
943
1. In apparatus such as described in Specification of Patent No. 58968 the
combination with the movable blades E of the handles or hand levers H H¹the
connecting rod h¹ and lever h substantially as described.
2. In apparatus for drawing the weft thread from woven cloth the mechanism
for regulating the feed having a swinging lever to actuate the pawl and ratchet
wheel which communicate movement to the feed roller, and index plate and bevel
wheel by which the position of the centre, upon which the swinging lever oscillates
is adjusted substantially as described and shown.
3. Apparatus for drawing the weft thread from woven cloth having a cam wheel
such as S in combination with the thread guide to give a vibrating movement
thereto substantially as and for the purpose described.
Dated this 20th day of June 1801
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.