Improvements in Picking Motions of Looms for Weaving.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Picking Motions of Looms for Weaving.
I, THOMAS SHAW, of 32, Church Street, Padiham, Lancashire, Watchmaker
and Jeweller, do hereby declare the nature of this invention to be as follows:-
It is designed to supersede the present form of picking motion as applied to
power looms. It proposes to abolish the tappets, cones, picking shafts, picking
sticks, picking straps and pickers as already existing.
In place of the above I propose to fix two tappets (iron or steel) of a novel
construction under the movable lay, attached to the lay swords and carried along
with them. These tappets are free to work on their own centres, which are placed
in a direction parallel to the sides of the loom, and each consists of two inclined
planes, set on each side of a centre, and curving upwards in a spiral formation.
A short arm is attached to each tappet.
The action of picking the shuttle is obtained by the planes of these tappets,
in their forward movement with the lay swords alternately coming in contact
with, and being depressed by-two rotary pulleys, revolving on a centre-fixed
by a bracket cast on or bolted to the front of the loom-having a motion parallel
to the front of the loom. The alternate motion is obtained by a lever fixed on
a fulcrum to the loom frame, one end of which is attached to the pulley centre,
and the other working on a wheel or disc fixed on, and revolving with the
present tappet shaft, this wheel or disc having an eccentric periphery. This
eccentricity moves the pulleys on to the alternate planes of the tappets, thus
whilst one side is picking the shuttle, the other is being placed back in position.
A wire attachment from the short arm of the tappet to the shuttle spindle, with
a provision made in it for the reception of the shuttle tip, and to act as picker
completes the connection.
100 IN A ICKIng motions of Looms for Weaving,
I, THOMAS SHAW, 32, Church Street, Padiham, Lancashire, Watchmaker and
Jeweller, 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
This invention is designed to supersede the present form of picking motion
as applied to power looms. I dispense with the usual tappets, cones, shafts,
гD 077

page_text: picking sticks, picking straps and check straps already in use, and in substitution
thereof employ two tappets (iron or steel) of a novel construction, which are
loosely mounted on a shaft or stud carried by the lay swords, and are carried
along with them when in motion. These tappets are free to move on their own
centres, and are placed in a direction parallel to the sides of the loom, and each
consists of two inclined planes set on each side of a centre, and curving upwards
in a spiral formation. A short arm is attached to each tappet.
The action of picking the shuttle is obtained by the planes of these tappets in
their backward movement with the lay swords, alternately coming in contact
with and being depressed by two rotary pulleys, revolving on a centre fixed by
The alternate motion is
a bracket (cast on or bolted) to the front of the loom.
obtained by a lever fixed on a fulcrum to the loom frame, one end of which is
attached to the pulley centre, and the other working on a wheel or disc or
drunken cam, fixed on and revolving with the present tappet shaft, and having
an eccentric periphery. This eccentricity moves the pulleys on to the alternate
planes of the tappets, thus whilst one side is picking the shuttle, the other is
being placed back in position. A wire attachment from the short arm of the
tappet to a picker sliding on the loom spindle completes the connection.
Any suitable or usual means may be adopted for checking the shuttle.
In the accompanying drawings, Fig. 1 is a sectional side elevation, and Fig. 2
a detached front view of a loom with my improved picking mechanism applied.
Figs. 3, 4 and 5 are plan, front view and back view respectively of my improved
picking plane or tappet, which is of peculiar and novel construction. It consists
of two inclined planes A and B, set on each side of a centre C, and projecting
upward somewhat, and curved somewhat in reverse directions, participating of
the nature of a spiral formation.
The
The said picking plane is provided or cast with a bracket D having a channel
or groove formation E.
As will be seen by reference to Figs. 1 and 2, the picking
plane is secured by a stud G to the bracket F fixed by a boss H to a cross
shaft J, which extends from sword to sword of the slay. The stay rod K, boss H
and bracket F are cast all in one piece, the said bracket extending above boss H,
and is bored and tapped for the reception at right angles of the stud G.
stay rod K extends downwards from bracket F, and is bolted at its extremity to
a small angular slotted projection L, which projects from the rocking-tree M
of the loom, and by means of which the speed of picking can be regulated to a
nicety, the said rod being moved forward or backward in the slotted projection L,
and thereby the picking tappet is tilted in either direction to the requisite degree.
The tilting of the picking plane as described has the effect of causing the bowl
or pulley X (hereinafter described) to take the curves A and B of the plane,
either fully or partially, by which means the speed of the pick will be varied.
The more abruptly the curves A and B are traversed the greater the speed of the
pick, and rice versa. The time of the pick is regulated by screwing the stud (+
one way or the other in a tapped hole in the bracket F', when nuts are tightened
upon the same to firmly secure it.
The channelled bracket D cast to the picking plane D' has bolted to it a curved
or bent arm N, to which a wire connection O is made to the picker P, the said
wire connection passing upwards through a slot in the bottom of the shuttle box,
and being formed with a loop or eyelet O¹ which is slipped on a stud Z formed
in a recess in the side of the picker P as shewn, so that it cannot leave its position
owing to being pushed into the slot of the shuttle box.
Having thus described my improved picking tappet or plane D¹ and its connec-
tions, I will proceed to describe the mechanism employed for effecting the throw
of the pick.
For this purpose, I mount on a tappet shaft Q, a drunken cam R. In the
groove R' of this drunken cam enters a stud S fixed at one end of a lever T,
pivotted at T to the bracket extending from the loom frame. The other end
of this lever T is knuckle or otherwise jointed to boss ¹ bolted to the sliding

page_text: shaft V, which slides with a to and fro end movement (by the motion of the said
cam) in a support W fixed to the breast beam of the loom. On this sliding
shaft V, the rotatable pulley or bowl X is mounted, and may have either a plain
or bevel edge as desirable. The particular method of jointing the lever T to
the boss is shewn in Fig. 6, the end of the said lever being formed with a
circular recess, into which fits extension of boss U₁ as shewn, the joint being
secured by a pin, but any other suitable joint may be employed.
The picking of the shuttle is effected on the backward movement of the slay
by the action of the pulley or bowl X on the tappet D', which thereby withdraws
the curved arm N, and by its wire connection acts on the picker, and throws the
shuttle to the opposite box. The drunken cam is so timed that as the crank
of the slay is moving from front to bottom centre, the sliding shaft V, through
the medium of lever T, will bring the pulley or bowl X into such a position
as to act upon the face B (see Fig. 3) of the tappet D', the abrupt curvature
of which effects the throw of the pick. With the forward movement of the slay,
as the picking bowl or pulley is leaving the tappet D', the blade spring Y acts
upon the side of the channel bracket D, causing a partial turn of the tappet D¹,
bringing the picker about midway in the shuttle box by this movement, when it
is then finally carried back into striking position by the bowl or pulley X bearing
upon and turning the opposite plane of face A of the tappet (see Fig. 3) with
the return movement of the slay.
A similar arrangement is made at the opposite side of the loom with the
exception that the drunken cam S and lever T are only required at one end of
the loom, the motion which they effect being transmitted by the sliding shaft V.
Any suitable or usual shuttle checking appliance may be adopted.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. The improved arrangement and construction of picking motions of looms,
substantially as described and illustrated in the accompanying drawing.
2. In picking apparatus of looms, the novel form of tappet substantially as
described and illustrated in Figs. 3, 4 and 5.
3. The drunken cam S or its equivalent and the lever T for effecting a sliding
to and fro end movement to the shaft V, carrying picking bowl or pulley X,
which gives an alternate movement to the tappet D¹, substantially as described
and illustrated for the purpose specified.
4. The picking tappet D in combination with the sliding shaft V, and the
picking bowl or pulley X, substantially as described and illustrated.
5. The attachment of sliding shaft, or some such shaft as V, carrying picking
pulleys X, to the breast beam or front part of the loom, and the connection
of the picking tappets or planes D' to the slay swords, so as to participate in
the rocking movement thereof, substantially as described and illustrated.
Dated this 7th day of September 1898.
RICHMOND & Co.,
Chartered Patent Agents, 12, Standish Street, Burnley.
RICHMOND & Co.,
Chartered Patent Agents, 12, Standish Street, Burnley.