An Improved Positive Picking Motion for Under-pick Looms.
Year: 1889

page_text: Date of Application 27th Nov., 1889
Complete Specification Left, 16th Aug., 1890-Accepted, 20th Sept., 1890
PROVISIONAL SPECIFICATION.
An Improved Positive Picking Motion for Under-pick Looms.
WILLIAM RICHARD MEADOWs 37 Pine Street off Wash Lane Bury Lancashire
Mechanic SAMUEL WILD Mule Overlooker 167 Wash Lane Bury Lancashire
EDWARD WHIPP DAWSON Engineer 3 Clifton Street Bury Lancashire do hereby
declare the nature of this invention to be as follows:-
The looms to work without picking shafts, picking leathers, scrowles, tumblers or
half moons.
For the picking shafts & picking leathers now in use, we shall substitute two
picking stick brackets, with a swivel joint, & two levers attached, for the strikers to
work upon, one lever for each bracket, two levers with strikers attached worked by 3
wheels, viz. Driving wheel on crank shaft, carrier wheel & pick shaft wheel, &
working on the pick shaft, (which shaft crosses the loom) & will take the places of
the scrowles tumblers & half moons at present used.
:
Dated this 4th dow of January 1800
W. R. MEADOWS.
S. WILD.
E. W. DAWSON.
COMPLETE SPECIFICATION.
An Improved Positive Picking Motion for Under-pick Looms.
We WILLIAM RICHARD MEADOWs of 37 Pine Street Wash Lane Bury Lancashire
Mechanic, SAMUEL WILD of 167 Wash Lane aforesaid Mule Overlooker and EDWARD
WHIPP DAWSON of 3 Clifton Street Walmersley Road Bury aforesaid Engineer
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 and accompanying drawings:-
Our said invention relates to an improved mode of operating the picking mechanism
in looms the duty of the said picking mechanism being to throw the shuttle from one
end of the race to the other during the process of weaving as is well understood.
The invention is particularly applicable to underpick looms and the looms used in the
weaving of fustians. In carrying our invention into effect we dispense with the
ordinary or well known means for operating the picking sticks and work them
positively by means of tappets and levers from a shaft or suitable revolving part of
the loom the tappets effecting the quick forward stroke of the picking sticks while
springs or other suitable means are used to return the picking sticks to their normal
position.
To render our invention perfectly clear we will now proceed more particularly to
describe the same with reference to the annexed sheet of illustrative drawings.
Fig. 1 shows an end frame of a loom to which our invention appears attached.
Fig. 2 is a view at right angles to Fig. 1 looking from the front of the loom and
showing one end frame and so much of the loom as is requisite to illustrate our
invention.
The end frame is marked a the crank shaft b and the tappet shaft c. The shaft c
is driven from the crank shaft 6 by a tooth pinion represented in Fig. 1 by the dotted
line d which gears with a tooth wheel represented by the dotted line e both wheels
appearing in full in Fig. 2. It will be understood that although we show and describe
this apparatus as at one end only of the loom the mechanism exists at both ends.
Upon the shaft c we secure a tappet f and we also pivot a double lever 9 upon a
stud projecting from the frame.

page_text: The upper extremity of the double lever g is in the path of the tappet f so that at
each revolution of the shaft c the tappet strikes the end of the double lever and raises
it thus depressing the lower end. The lower end of the lever g is fitted with an
adjustable piece g₁ which can be set so as to operate the picking stick i to a greater
or lesser extent. The bracket to which the picking stick i is secured is pivotted on
a stud projecting from the sleeve the said sleeve being carried on a stud m which
projects from a bracket n bolted to the end frame a. The picking stick bracket j has
a tail o which comes exactly beneath the adjustable piéce g¹ on the lower end of the
double lever g. The bracket j has also a snug p to which one end of the spring is
attached, the other end of the spring being attached to a bracket or other fixed part
of the loom. The tendency of the spring q is to keep the picking stick i constantly
in the normal position shown in Fig. 2. From the foregoing description of the
mechanism it will easily be understood that when the loom is in motion the tappet f
in revolving in the direction of the arrow strikes and lifts the upper extremity of the
double lever g throwing the lower end sharply downward and thus striking the tail o
so as to cause the picking stick i to be jerked inwards towards the side of the loom
by which motion the shuttle is impelled along the race, the return of the shuttle
being effected by the picking stick at the other end of the loom. As soon as the
tappet has passed the upper end of the double lever g the spring q re-acts to bring
the picking stick i back to its normal position as shown in Fig. 2 so as to be ready for
the next revolution of the tappet. By means of the described mechanism we obtain
that a positively communicated motion is given to the picking sticks and we thus
ensure a more certain operation of the shuttle. A secondary advantage of the adjust-
able piece g' on the lever g is that not only can the stroke of the picking stick be
regulated but as this part of the mechanism is liable to considerable fatigue the adjustable
piece gif broken can be easily and cheaply renewed.
The spring of the double lever g is such that no picking leathers need be used and
the apparatus works with a sweetness and ease that renders breakage or straining of
the parts unlikely.
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. The general arrangement construction and combination of parts comprising our
improved positive picking motion for looms as hereinbefore described and shown.
2. As a positive picking motion for looms the combination of the tappet pivotted
double lever with adjustable piece g' and picking stick bracket j formed with a
tail o so as to be operated on by the lever g the said bracket j being also fitted with
a spring to return the picking stick to its normal position substantially as herein-
before described and illustrated.
Dated this 15th day of August 1890
DUTTON & FULTON,
1, St. James Square, Manchester,' Agents.