Improvements in Board Looms for Weaving Thick or Heavy Fabrics.
Year: 1898

page_text: Date of Application, 4th Aug., 1898-Accepted, 24th Sept., 1898
COMPLETE SPECIFICATION.
Improvements in Board Looms for Weaving Thick or Heavy Fabrics.
I, EDWARD HOLLINGWORTH, of Dobcross Loom Works, Dobcross, in the County of
York, Power Loom Maker, do hereby declare the nature of this invention (which has
been communicated to me by George Frank Hutchins, 311, Main Street, of
Worcester, in the County of Worcester, and State of Massachusetts, United States
of America, Power Loom Maker,) and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:-
My invention relates to looms, and more particularly to a supplemental mechan-
ism to be applied to and used upon wide looms for weaving thick or heavy fabrics,
such as duck cloth, etc., to prevent any bending or back spring of the slay board
intermediate its connections with the crank shaft, when the slay board is in its
forward position.
The object of my invention is to provide a simple and effective mechanism
adapted to be applied to and combined with looms of ordinary construction of the
class above referred to, and for the purpose above stated, and my invention con-
sists in certain novel features of construction of mechanism, as will be hereinafter
fully described.
Referring to the drawing:-
-
Fig. 1 is a rear perspective view of portions of a loom, with my improvements
applied thereto, and,
Fig. 2 is a plan view, on an enlarged scale, of my improved mechanism shown in
Fig. 1.
In the accompanying drawings, 1 is a loom side, 2 is the loom centre or stay.
3 is the driver shaft, and 31 the driving pinion fixed upon shaft 4, 4' is the crank
shaft, 5 and 6 are intermediate gears, 7 is the crank or connecting arm, 8 is the
slay board, 9 one of the lathe swords, secured at its lower end on the rocker shaft 10;
11 is the hand rail, and 12 a portion of the reed, all of which may be of the ordinary
and usual construction.
I will now describe my supplemental mechanism.
On the bottom shaft 3 is fast a gear 13, which meshes with a gear 14 fast on
a short stud 15, journalled in bearings 16 on the cross rail and loom stay 2,
see Fig. 2. On the end of the shaft 15 is fastened a crank disc or wheel 18, and
on the said disc is a pin or stud 19 on which is loosely mounted a roll or bowl 20.
A new or additional lathe sword 21 located between the end or outer lay swords 9
is secured at its upper end to the rear portion of the day 8, and secured at its
lower end on the rocker shaft 10, having thereon a curved or cam surface 22,
which is preferably made removable and adjustable by bolts 23, or otherwise.
The cam surface 22 at the foot of lathe sword 21 is arranged relatively to the
bowl 20 on the crank disc 19, and the revolution of said disc is so timed, that when
the lay board is very near its forward position on its forward stroke, the bowl 20
will be at the back of, and ready to engage the curved or cam surface 22 on the
middle lay sword 21, and if there is any bending or back spring of the slay board 8
as it beats up, the roll 20 will engage the cam surface 22, and push forward the

page_text: said lay 8, and bring it into alignment when the lay is at its extreme forward
movement, thus beating up the cloth in a straight line the whole length of the
slay board.
In the ordinary weaving of the loom, in case there is no back spring of the slay
board the roll 20 may be carried around with the disc 18, and pass by the cam
surface 22 on the stand 21 on the forward stroke of the lay, without any engage-
ment therewith.
a
By the construction of my mechanism, it will be seen that the roll 20 is in
position to engage the cam surface 22 on the middle lathe sword 21 only during
portion of a revolution of the disc '18, and during the rest of the revolution of
said disc, there is no engagement, or possibility of engagement between the roll 20
and cam surface 22. This is an advantage, as it reduces very much the friction
on the parts, and any loss of power.
I have shown in the drawings only one middle lathe sword 21, and one crank disc
or wheel 18 and engaging roll 20, but it will be understood that there can be one or
more on the loom, according to the width of the loom.
It will be understood that the details of construction of some of the parts of my
improvements may be varied if desired, for example, a crank arm carrying the
roll 20 may be used in place of the disc or wheel 18, as indicated by dotted lines 21,
Fig. 1. The roll 20 may be dispensed with, and only a stud or pin used.
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. In a loom, the combination with the slay board, and means for actuating
the same, and an additional lay sword (intermediate of the end lathe swords) having
a curved or cam surface thereon, to be engaged by a roll or pin on a crank disc or
arm, of said crank disc or arm carrying a roll or pin to engage said curved or cam
surface during a portion only of the revolution of said crank; substantially as
shown and described.
2. In a loom, the combination with the lathe sword, and means for actuating
the same, and a lathe sword intermediate of the end lathe swords, having an adjust-
able curved or cam surface thereon to be engaged by a roll or pin on a crank disc
or arm, of said crank disc or arm carrying a roll or pin to engage said curved or
cam surface during a portion only of the revolution of said crank, and means for
supporting and revolving said crank, substantially as shown and described.
Dated this 3rd day of August 1898.
TASKER & CROSSLEY,
Patent Agents, Halifax, Agents for Applicant.