Improvements in or connected with the Swells and Shuttle-boxes of Looms for Weaving Textile Fabrics.
Year: 1892

page_text: Date of Application, 8th Nov., 1892
Complete Specification Left, 13th Mar., 1893-Accepted, 15th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with the Swells and Shuttle-boxes of
Looms for Weaving Textile Fabrics.
I, THOMAS MATHEWSON, of 41 Hawkhill, Dundee, in the County of Forfar,
N.B. Foreman Mechanic, do hereby declare the nature of this invention to be as
follows:-
My said invention has for its objects to reduce wear and tear on the swells, box
backs, and shuttles of looms for weaving textile fabrics.
In looms as heretofore constructed, the swells and the box backs are made of
wood, consequently they soon deteriorate because of the rubbing action of the
shuttle, with the result that it is not shot truly across the lathe, thus causing it to
fly out and break the yarn or injure the attendant.
To obviate these defects, I protect the swells and the box backs by flat steel
springs, each spring being firmly fixed at the innermost end of the box back, that
is to say where the shuttle enters between the box front and back, and held against
the other end of the box back by a screw which passes through an elongated hole
in such spring. The spring conforms to the shape of the swell and is flattened
when the side of the shuttle presses against it.
From the foregoing it will be seen that the shuttle slides against this steel spring,
and that the swell is merely used to press it out and keep it in position for the
reception of the shuttle. The action of the spring is to soften this reception, to
keep the shuttle cool in working, and to put a smooth face upon it.
Dated this 5th day of November 1892.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.
COMPLETE SPECIFICATION
Improvements in or connected with the Swells and Shuttle-boxes of
Looms for Weaving Textile Fabrics.
1, THOMAS MATHEWSON, of 41 Hawkhill, Dundee, in the County of Forfar,
N.B. Foreman Mechanic, 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 :-
My said invention has for its objects to reduce wear and tear, on the swells, box
backs, and shuttles of looms for weaving textile fabrics.
In looms as heretofore constructed, the swells and the box backs are generally
made of wood or iron, consequently they soon deteriorate because of the rubbing
action of the shuttle, with the result that it is not shot truly across the lathe, or
lay, thus causing it to fly out and break the yarn, or injure the attendant.
And in order that my said invention may be properly understood, I now proceed
more particularly to set forth the system, mode or manner, in or under which the
same is or may be used, or practically carried into effect, reference being made to
the accompanying drawings, and to the letters and figures marked thereon, that is
to say:
Figure 1. is a front elevation, with front of box and shuttle removed to show the
method of attaching the swell protector.
Figure 2. is a sectional elevation at A. A. (Figure 1.) with sword and reed, and
hand cap or upper shell removed, and

page_text: Figure 3. is a plan with sword and reed removed showing the shuttle just entering
the box.
Figures 4. and 5. respectively illustrate a side view and a plan of the shuttle and
swell protector.
To obviate these defects, namely the defects recited in the preamble, I protect
the swells 6. and the box backs 7. by shuttle and swell protectors 8, that is to say
flat steel springs, each spring being firmly fixed at the innermost end 9. of the box
back, and held against the other end of the box back by a screw or bolt 10. which
passes through an elongated hole 11. in such shuttle and swell protector or spring.
The shuttle and swell protector or spring 8. conformis to the shape of the swell 6.
but is not attached to it, and is straightened when the back of the shuttle 12.
presses against it.
From the foregoing it will be seen that the shuttle 12. slides against this shuttle
and swell protector or steel spring 8, and that the swell 6. is pressed against it
helping to keep it in position for the reception of the shuttle. The action of the
shuttle and swell protector or spring is to soften this reception, (thus lessening the
possibility of the cop breaking down) to reduce wear and tear on the swells, box
backs and shuttles, also to keep the shuttle cool in working, and to put a smooth
face upon it.
And further, its use tends to the reduction of the wear and tear on
the pickers, picker straps, and martingales, and reduces the liability of the shuttle
to fly out, hence preventing "chapping off" and thus saving wear and tear on the
loom generally, or the possibility of an accident happening to the attendant.
Having now particularly described and ascertained the nature of my said inven-
tion, and the system, mode, or manner in or under which the same is or may be
used or practically carried into effect, what I consider to be novel and original, and
therefore claim as the invention secured to me by the herein before in part recited
Letters Patent is :-
In looms for weaving textile fabrics.
(1) The improved system, mode, or manner in or under which the same is, or
may be used, or practically carried into effect, as hereinbefore described and shewn
in the accompanying drawings.
(2) The use of shuttle and swell protectors, that is to say flat steel springs,
substantially as hereinbefore described and illustrated in the accompanying
drawings.
(3) The method of guiding the shuttle and swell protector, or spring with
particular reference to Figures 1. 3. 4. and 5, and the reference figures or
numbers 10. and 11.
(4) The method of protecting the swell by a spring fixed or attached to the box
back only.
Dated this 11th day of March 1893.
March 1893.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.