Improvements in the Picking Motions of Looms for Weaving.
Year: 1898

page_text: Date of Application, 20th Apr., 1898
Complete Specification Left; 20th Jan., 1899-Accepted, 4th Mar., 1899
PROVISIONAL SPECIFICATION.
Improvements in the Picking Motions of Looms for Weaving.
We, FREDERICK BROADBENT, of 38, Bengal Street, and HARRY WOOD, of 648,
Manchester Road, both in the City of Bradford, Weaving Overlookers, do hereby
declare the nature of this invention to be as follows:-
This invention has for its object, the arrangement of the picking motion of
looms for weaving in such a manner that, we are enabled to dispense with leather
or other flexible picking straps now commonly used in conjunction with the pick-
ing motions; and to impart to the picker and shuttle a positive and uniform
force of pick with less friction on the picker and guide spindle than is the case
when a leather or flexible strap is used for connecting the picking arm to the
picker.
In carrying out our invention, we mount and operate the vertical spindles of
the picking motions at each end of the loom in the usual manner, and connect
to each upright a metallic arm to which is jointed a link, the opposite end of
which is jointed to a bent bar attached to the picker. Each arm, link and bent
bar, are so arranged that, when the tappet is striking the picking cone, the full
force of the impact is transferred to the link and through the link to the bent
bar and picker, thus transmitting to the picker and shuttle a positive, firm and
regular amount of force.
By connecting the upright spindles to the pickers in the manner described, the
force of the impact is not so much absorbed as is the case by springing and
elasticity of the leather or other flexible connection now in common use, the
picker is not raised against the guide spindle, and by firm and positive force
applied to the picker the wear and tear is reduced.
1041
1
1 1000
COMPLETE SPECIFICATION.
Improvements in the Picking Motions of Looms for Weaving.
We, FREDERICK BROADBENT, of 38, Bengal Street, Bradford, in the County of
York, Weaving Overlooker, and HARRY WOOD, of 648, Manchester Road, Brad-
ford, in the County of York, Newsagent, late Weaving Overlooker, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
-
The use of leather picking straps or bands and wooden picker arms in power
looms for woven fabrics and more especially those of the "overpick" type has been
attended by considerable drawbacks in the way of cost for renewals by reason of

page_text: the wear and tear caused by the rapid reversals in direction of the picking arms
when transmitting motion to the picker driving the shuttle. Considerable risk
is also run by the weaver through the picking sticks and straps breaking as well
as by the shuttle flying out of the shed owing to the picker head being pulled out
of a direct line by the angular action of the arms and straps. From these causes
a considerable loss of power has also been entailed owing to the length of stroke
required to be made by the arm to take up the slack of the picking band and
provide sufficient force to project the shuttle across the loom.
Our invention is designed to overcome these drawbacks and provide mechanism
of a more substantial character which by its movement reduces shocks and drives
the picker head in a more perfect rectilineal direction thus reducing banging or
knocking off to a minimum.
The invention consists essentially in the provision of picking arms made of
metal and jointed in such a way that the objects just referred to are attained.
Our invention will be fully understood by reference to the accompanying draw-
ings in which,
Fig. 1 represents our improvements as fitted to a loom ready to commence the
movement for picking,
Fig. 2 the arms and drag by themselves in the bent position and,
Fig. 3 the arms straightened out.
We accomplish our object by substituting steel, wrought or malleable iron,
bars A in place of the ordinary wooden picker arms and fix them to the bosses a
at the top of the picking rods B by the usual nuts and screws. Each metal arm
is considerably shorter than the wooden one previously used; but is made up to
the length of the latter by another length C joined on to it at c by means of a
knuckle joint and pin. At the extreme end of this additional part is a small
stud c¹ to which is fixed the drag D or connection between the picking arm and
picker head d this connection being made of raw hide, leather, metal or a com-
bination of these or other materials so that the connection be made in a suitable
way.
The joint is made in such a way that the arm will only bend one way so that
when picking the arm can come perfectly straight and when returning give way
in the form of a bent knee, our object being to get, on the first movement of the
pick, which is slow, a straightening out of the arm which just at the moment
when the full force is applied has become stiff and being nearly at the centre of
the pick it draws the picker head in a rectilineal direction. At the end of the
pick there is only the momentum of the jointed end which then gives way with-
out shock and remains bent until another stroke determines the straightening out
preparatory to driving the shuttle.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is: -
1. In looms for weaving the use of picking mechanism for conveying motion
from the picking rods to the picker, consisting in the combination of arms A
and C jointed together and connected to the picking rods and pickers substantially
in the manner and for the purposes described.
2. The improvements in picking mechanism for looms constructed and arranged
substantially as described and as shown in the accompanying drawings.
1011
Tano 1900
TAYLOR & FIRTH,
Osborne Chambers, 48, Sunbridge Road, Bradford,
Agents for the Applicants.