Improvements in Actuating Healds for Forming Selvedges on Fabrics.
Year: 1891

page_text: Date of Application, 24th Sept., 1891
Complete Specification Left, 23rd June, 1892-Accepted, 24th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Actuating Healds for Forming Selvedges on
Fabrics.
We, THOMAS BRACEWELL of 16 High Street, Windhill, Shipley, Over-
looker, JOSEPH BRACEWELL, 28 Saltaire Road Shipley, Overlooker, and JOHN
BRACEWELL Junior, of Ann Street, Carr Lane Windhill, Shipley, Overlooker
do hereby declare the nature of this invention to be as follows:-
We employ for the purpose of making a plain selvedge upon such fabrics as are
known as Italians" "Satins" "Twills" and other such fabrics two special selvedge
healds, and we actuate these selvedge healds in an entirely novel manner. On the
lower or tappit shaft of the loom we place a scroll cam, that is, a cam with
a groove cut on its surface in such a manner that it will cause an arm of a
lever to move in a direction parallel with the axis upon which the cam is
revolving.
Along with this cam we employ a lever, one end of which is actuated by
the cam and the other end has its motion converted into a reciprocating
vertical one which is communicated to the healds by cords or straps in the usual
manner.
We may employ a separate lever for each heald, or by connecting the healds at
the top in the usual manner of a plain loom, one lever attached to one heald and a
spring or weight to the other would serve the same purposes.
In attaching the healds to each other we use a shaft of small diameter, and
coil a sufficient length of the cord or leather round to give off for the necessary
movement of the healds.
By this arrangement we are enabled to place our edging or selvedge healds
behind the ordinary healds, thus placing the latter more compactly together and
enabling us to form a better shed for the shuttle to pass through.
Dated this 22nd day of September 1891.
THOS. R. ASHENHURST,
71, Ashgrove, Bradford, Agent.
COMPLETE SPECIFICATION.
Improvements in Actuating Healds for Forming Selvedges on
Fabrics.
We THOMAS BRACEWELL of 16 High Street, Windhill, Shipley Over-
looker JOSEPH BRACEWELL, 28 Saltaire Road Shipley, Overlooker, and JOHN
BRACEWELL Junior, of Ann Street, Carr Lane Windhill, Shipley, Overlooker,
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 :-
We employ for the purpose of making a plain selvedge upon such fabrics as are
known as Italians" "Satins' Twills" and other such fabrics two special selvedge
healds in an entirely novel manner. On the lower or tappit shaft of the loom we
place a scroll cam, that is, a cam with a groove cut on its surface in such a manner
that it will cause an arm of a lever to move in a direction parallel with the axis
upon which the cam is revolving.
:
Along with this cam we employ a lever one end of which is actuated by the
cam and the other end has its motion converted into a reciprocating vertical one,
which is communicated to the healds by cords or straps in the usual manner.
We

page_text: may employ a separate lever for each heald or by connecting the healds at the top,
in the usual manner of a plain loom, one lever attached to one heald, and a spring
or weight to the other would serve the same purpose.
In attaching the healds to each other we use a shaft of small diameter, and
coil a sufficient length of cord or leather round it to give off for the necessary
movement of the healds.
By this arrangement we are enabled to place our edging or selvedge healds behind
the ordinary healds, thus placing the latter more compactly together, and enabling
us to form a better shed for the shuttle to pass through.
And in order that our invention may be understood we proceed to describe it as
follows and by reference to the accompanying drawings:-
-
A. Fig. 1 is the lower or tappet shaft of the loom and B is the scroll placed
upon it, and revolving with it. C is the lever arm having its fulcrum at a. D is
another lever arm attached to the same shaft or fulcrum as C and having the
opposite end or extremity attached to the healds by bow bands that is strings from
cach end of the heald to the lever, or other means in the manner shown at F.
From the top of the healds G we carry a strap and coil it round the small shaft H
and connect one heald to the other, the strap being held in its centre by a small
stud, so that by this means one heald may be caused to actuate the other.
The particular method we employ in carrying the strap round the shaft, and
keeping the healds sufficiently close together is by passing the strap round the
shaft in spiral form, and keeping it in position by a species of worm shaped
projection as shewn at Fig. 2.
For some particular patterns, and when the selvedge is not required absolutely
plain cloth, we employ a scroll taking the form of a worm and cause it to act upon
a toothed wheel which carries a tappet, and we arrange the scroll so that it shall
strike the wheel every three, four or any number of teeth according to the number
of picks in each shed in the selvedge or according to the pattern. For example,
to weave a selvedge on an "Italian" cloth with two picks of weft in one shed of
the warp, and three picks of weft in the next shed of the warp, we should employ
a wheel having 20 teeth so that one revolution with the scroll taking four teeth at
once of the tappet wheel we should have one complete pattern, as shown at Fig. 3,
and the tappet would be so formed as to act upon the lever and move the healds in
the desired manner. That is, the heald would be raised for two picks and
depressed for three or raised for one and depressed for four according to the form
of the tappet.
In like manner we should vary the wheel and form of tappet for any desired
pattern.
Having now fully described and ascertained the nature of our said invention
and the manner in which it is to be performed we declare that what we
claim is :-
1st. The employment of a scroll of the form shown in Fig. 1. or that shown in
Fig. 3 or similar arrangement, for actuating a lever or levers for communicating
motion to selvedge healds.
2nd. The use of the particular form of shaft shown and described as in Fig. 2.
3rd. The combination of parts as herein set forth and described, and for the
purposes stated.
Dated this 22nd day of June 1892.
THOS. R. ASHENHURST,
Agent.