Jacquard Mechanism Employed in Looms for Weaving.
Year: 1888

page_text: Date of Application, 13th Feb., 1888
Specification Accepted, 16th Mar., 1888
Jacquard Mechanism Employed in Looms for Weaving.
I, EDWARD HOLLINGWORTH, of Dobcross, Yorkshire, Power Loom Maker, 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 has reference to that class of loom commonly called the Holling-
worth and Knowles loom, the object of my present invention being to simplify the
construction of the form of apparatus hitherto employed in reversing the chain or
pegging cylinder of the Jacquard.
In carrying out my invention I fix on the end of the top chilled gear shaft and
also on the end of the bottom chilled gear shaft a peg wheel. These peg wheels are
arranged not to be exactly opposite each other, but one a little to the side of the other;
and midway between the peg wheels is arranged a star wheel formed on or connected
to the boss of a spur wheel, which spur wheel is in gear with a spur wheel on the end
of the shaft carrying the Jacquard and chain or pegging cylinder, the arrangement
being such that when the peg wheel revolves, the stud thereon enters one of the
notches in the star wheel, causing such star wheel and consequently the chain cylinder
to partially rotate, but when it is necessary for the chain cylinder to be reversed or
moved back, I employ additional apparatus which moves the star wheel from contact
with one peg wheel into gear with another peg wheel revolving in the opposite
direction, whereby the motion of the chain cylinder which is intermittent, is reversed
as and when required by the weaver. The mechanism I employ for giving lateral or
sidewise movement to the star wheel comprises a clutch fixed upon a shaft which is
made to oscillate by the weaver moving a suitable form of hand lever, and in order

page_text: to ensure that the lever may not be operated of itself a grooved pulley is attached to
the said lever in contact with the pointed end of a piston forced against the pulley
by means of a spiral or other form of spring, the position of the point of the piston
being so placed that it must be on either one side or the other of the said grooved
pulley.
In order that my invention may be better understood, I will now make reference
to the accompanying sheet of Drawings illustrative thereof, wherein Fig. 1 is front
view of such parts of the Jacquard mechanism as is necessary to illustrate my
improvements, and Fig. 2 is end view thereof. A and B are respectively top and
bottom shafts of the chilled gears, which chilled gears are represented by letters (
and D, whilst E and F are the peg wheels, which are placed as shewn in Fig. 2 at
different sides of the star wheel G. The said star wheel G is attached to the boss of
the spur wheel H, both of which are capable of sliding endwise upon the shaft I.
The peg or chain cylinder shaft J, which shaft carries a spur wheel K in gear with
wheel H, is driven by said wheel H; or if necessary there may be an intermediate
wheel between wheels H and K. In order to place the star wheel out of gear with
peg wheel E and into gear with peg wheel F a groove is formed at a in the boss of
the star wheel into which groove is placed a clutch fork 6 fixed to the end of the
horizontal shaft c, on which said shaft is also fixed the hand lever d, which for
convenience' sake may be placed midway of the loom or in other convenient position
as required. The lever d carries a grooved pulley e, and for the purpose of keeping
the lever arm & in a given position according to the selection of the peg wheel
employ a pointed piston f, working in a tube or cylinder g, which cylinder also
contains a spiral spring, whose function is to press the pointed end of the piston out-
ward. With reference to Fig. 2 it will be observed that the pointed end of the
piston is immediately under the centre of horizontal shaft c and in contact with one
side of the grooved pulley e so as to keep the hand lever d in its position and prevent
its moving sideway, but when the weaver requires to move the star wheel into contact
with the peg wheel F the hand lever is moved in the direction of the arrow, whereby
the opposite side of the grooved pulley e is taken against the other side of the pointed
end of the piston f and retained there, the piston during the movement of the pulley
being pushed into its cylinder until the centre of the pulley e is taken past the point
of the said piston, whereupon the piston is immediately forced out by its spiral spring
and makes itself safe against the opposite side of the pulley e, consequently whilst the
handle d is easily moved from one position to another, it is effectually retained in its
position by the point of the piston.
It must be understood that the shafts A and B are positively driven but in opposite
directions, and that therefore the peg wheels C and D are continuously revolving, so
that when the weaver desires to reverse the rotary motion of the chain wheel he or
she operates the hand lever, which through the intervention of the clutch 6 moves the
star wheel from one peg wheel to another, and therefore reverses the motion of the
chain wheel.
Instead of the star wheel having an endwise motion for the purpose of being brought
into contact with one or other of the peg wheels as already described and illustrated,"
the star wheel may be fixed upon its shaft, whilst the peg wheels may be capable of
sliding endwise upon their shafts, as illustrated in Fig. 3, where in this case I place
upon the horizontal shaft c a lever L having a fork at each end for taking into
grooves a formed on the bosses of the two peg wheels, so that when the hand lever
previously described is moved so as to oscillate the horizontal shaft e, the double ended
forked lever L is operated so as to place into gear with the star wheel either the upper
or lower peg wheel.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
:-
Firstly. In the Jacquard mechanism of looms for weaving having chilled wheels

page_text: wheels E and F for the purpose of reversing the rotary motion of the peg or chain
cylinder in manner and for purposes substantially as herein shewn and described.
Secondly. In the Jacquard mechanism of looms for weaving having chilled wheels
such as C and D, the combination therewith of the hand lever d, grooved pulley e,
and pointed piston f employed for the purpose of moving the star wheel G into
contact with the upper or lower pegging wheels substantially as herein shown and
described.
Thirdly. In the Jacquard mechanism of looms for weaving, having chilled wheels
such as C and D, the combination therewith of the double forked lever L for sliding
or placing pegging wheels into gear with a star wheol for the purpose of reversing
the rotary motion of the chain cylinder, the whole being employed and operated in
manner and for purposes substantially as herein described.