IMPROVEMENTS IN THE SHEDDING APPARATUS LOONS
Year: 1882

page_text: LETTERS PATENT to James, Irving of Barnsley in the County of York, Mill
Manager for an Invention of IMPROVEMENTS IN THE SHEDDING APPARATUS
LOONS"
"
PROVISIONAL SPECIFICATION left by the said James Irving at the Office
of the Commissioners of Patents on the 13th December 1882.
JAMES IRVING of Barnsley in the County of York, Mill Manager,
MENTS IN THE SHEDDING APPARATUS OF LOOMS
"
"IMPROVE-
My Invention relates to the apparatus employed to actuate the healds. in looms
for weaving. In looms as ordinarily constructed the healds are connected with
treadles or jacks which are acted upon by tappits and draw down the healds the
upward movement being received from overhead shafts and transmitted through
straps or cords. In lieu of this method I impart positive movements in both
directions by means of excentrics which alternately draw down and push up the
healds the ordinary jacks or treadles being dispensed with. In the arrangement
which I prefer to employ each excentric link or arm is jointed to a bar which is
guided to slide vertically by means of end rods or guides. To this bar are bolted
uprights to which are bolted or secured the shafts of the heald or of the healds
which always rise and fall together. By means of my Invention I obtain more
regular weaving, a saving in the wear and tear of the healds, less necessity for
adjustment and repairs and I also am enabled to run the loom at an increased speed
thereby obtaining an increased production.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said James Irving in the Great Seal Patent Office on the 12th June
1883.
JAMES IRVING of Barnsley in the County of York, Mill Manager, "IMPROVE-
MENTS IN THE SHEDDING APPARATUS OF LOOMS
33
My Invention relates to the apparatus employed to actuate the healds in looms
for weaving. In looms as ordinarily constructed the healds are connected with
treadles or jacks which are acted upon by tappits and draw down the healds the
upward movement being received from overhead shafts and transmitted through
straps or cords. In lieu of this method I impart positive movements in both
directions by means of excentrics which alternately draw down and push up the
healds the ordinary jacks or treadles being dispensed with.
In order that my invention may be fully understood I have attached hereunto a
sheet of drawings made to a scale of about one and a half inches to the foot and
illustrating the manner in which I carry my invention into effect. In the said
drawings Fig 1 is a front-view and Fig 2 an end view of parts of a loom and its
harness. In the said Figs a is a part of the ordinary tappit shaft of the loom,
and b, b¹ are the shafts of two sets of healds the healds themselves being omitted in
the drawings. The said shafts are bolted to flat vertical bars of thin metal C,
c²
the two healds in each set being placed one on each side of the bar and secured by
means of a bolt passing through the shafts and the bar. The lower ends of each
pair of bars are connected together by means of horizontal cross bars d, d' the
upper ends being attached to the belts on the top rocking shaft or being guided
vertically in any suitable manner. To each of the said cross bars are bolted the
upper ends of two rods e, e¹ as seen also in Fig 3. These rods slide in bearings
bored in the projecting flanches of the brackets f. f which are bolted to the inner
cross rails g, g of the loom framing. To the centre of each cross bar d is bolted a
jaw piece h, h¹ to which is jointed the upper end of an excentric rod i each rod
being connected with the strap of an excentric / which is keyed or secured upon
the tappit shaft. It will be seen that as the tappit shaft revolves the sets of
healds are caused to move up and down one set moving upwards as the other is
moving downwards as required in the weaving operation and also that the sliding
guide rods e, e¹ compel the healds to move in a straight line so that a steady
movement with little or no vibration is obtained.
By this means I obtain more regular weaving, a saving in the wear and tear of the
healds, less necessity for adjustment and repairs and am enabled to run the loom
at an increased speed and thereby obtain an increased production. I do not confine
myself to the use of the sliding rods e, el nor.to the attachment of the shafts to the
bars c, c¹ nor to the use of excentrics fitted with straps and rods as the excentrics
may act directly upon bars or upon a suitable frame to alternately draw down and
push up the healds, and cranks might be used in lieu of the excentrics.
Having now fully set forth and indicated the nature of my Invention and the
manner in which I carry the same into practical effect I would have it to be
understood in conclusion that I claim :-
First the combination of parts arranged and acting substantially as and for the
purpose set forth and indicated hereinbefore and in and by, the accompanying
drawings.

page_text: And secondly the employment of excentrics or cranks to impart positive up and
down movements to the healds in looms for weaving substantially as set forth
and indicated.
In witness whereof I the said James Irving have hereunto set my hand and
seal this ninth day of June in the year of our Lord one thousand eight
hundred and eighty three
Signed sealed and delivered by
the within named James Irving
in the presence of
JOHN SPENCE INGALL,
Designer
20 Market Street,
Barnsley.
JAMES IRVING (L.S.)