Improvements in Looms for Weaving Splits.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Looms for Weaving Splits.
We WILLIAM SIMPSON of number 165 Sussex Street Salford in the County of
Lancaster, Ironfounder, and SYDNEY SMART also of number 165 Sussex Street,
Salford in the County of Lancaster, Agent, do hereby declare the nature of our
invention for IMPROVEMENTS IN LOOMS FOR WEAVING SPLITS" and in what manner
the same is to be performed to be particularly described and ascertained in and by the
following statement and accompanying drawings in all the figures of which the same
letters refer to the saine parts :-
:―
Our said invention relates to improvements in the mechanism used in looms for
imparting an approximately horizontal reciprocating movement to certain eyed rods
through which the warp threads pass for forming selvages to enable the piece of cloth
to be subsequently divided longitudinally into several narrower pieces.
Referring to the accompanying drawings Fig. 1 is an elevation as seen from the
back of the loom of the mechanism to which our said invention relates. Fig. 2 is an
end view as seen from the left hand of Fig. 1. A is a frame carrying the eyed rods
to which a reciprocating motion is to be imparted. The said frame is pivotted at B
and a connecting rod C attached at its upper end to a crank D on the end of the cross
shaft E imparts a reciprocating motion to the eyed rods in the frame A when the
cross shaft E is caused to rotate in the manner hereinafter described. The position of
the pin of the crank D is adjustable in the crank so that the stroke of the crank may
be varied as is well understood. In lieu of the crank D an excentric might be
employed for the same purpose. Secured to the cross shaft E is a ratchet wheel E¹
having four teeth in which the pawls c¹ d' alternately gear and cause the cross
shaft E to rotate.
F is a rocking shaft held in suitable bearings and actuated from the crank shaft or
other part of the loom or parts accessory thereto moving at a suitable speed. Secured
to the rocking shaft F is a lever a which is connected at one end by means of a
shackle to the long end of a bell crank lever 6 pivoted at 61. A stud 62 on the short
end of the bell crank lever b projects through a slot in the lever c pivoted at c². To
the lower end of the lever c the pawl c¹ is hinged at c. When the rocking shaft
moves in such a manner as to depress the lever a the long end of the bell crank lever b
will be pulled downwards and the short end thereof acting on the lever c will pull the pawl c'
and cause the ratchet wheel E¹ and the cross shaft E to rotate a quarter of a revolution.
When the lever a rises the pawl c¹ will ride over the ratchet wheel E' without causing the
same to rotate. At the upper end of the lever c is a stud c* projecting through a slot in the
lever d which is pivotted at its upper end at d². To the lower end of the lever dis
hinged the pawl d', the motion of which on the ratchet wheel is opposed to that of
the pawl c¹, that is to say as the lever a is depressed the pawl d' will ride over the
ratchet wheel while when the lever a is raised the pawl d' will be pulled into gear
with the ratchet wheel and cause it to rotate a quarter of a revolution.
By means of the hereinbefore described device the cross shaft E will be caused to
rotate half a revolution each time the lever a is lifted and depressed and the frame A
will receive a single movement to the right or to the left for each rise and fall of the
lever a.
Although we prefer the arrangement of levers and two pawls working on the same
side of the ratchet wheel as herein before described we may actuate the ratchet wheel
by other arrangements of two ratchets. One such other arrangement is shown in
Fig. 3 which consists of two pawls hinged together at g and drawn towards each other
by means of a spiral spring to allow the device to open and permit either pawl to ride
over the teeth of the ratchet wheel. Such a device could conveniently be hinged at c³
to the lever c in which case the mechanism for actuating the pawl might be
dispensed with.

page_text: Although in most case we find it convenient to drive the cross shaft. E from a
rocking shaft F as above described we do not limit ourselves to the use of such a
shaft for actuating the pawls which cause the cross shaft E to rotate.
The pawls
might derive their motion from any other part of the loom or accessory parts working
in connection therewith and having a suitable speed. For example the pawls might
be actuated from the levers of a jacquard or shaft machine mounted over the
loom.
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 shaft E actuated by a ratchet wheel and pawls having at one end a crank D
or its equivalent for imparting a reciprocating motion to eyed rods used for carrying
selvage threads for weaving splits" substantially as bereinbefore described and set
forth.
6:
2. The combination of the bell crank lever with the levers c and d the pawls c¹ d'
and the ratchet wheel E' rotating the rocking shaft E substantially as and for the
purpose hereinbefore described and shown.
Dated this Twelfth day of Octahan 1000
JULIUS ALLMANN & Co.,
70, Deansgate, Manchester, Agents for Applicants.