IM- PROVEMENTS IN THE CONSTRUCTION OF 'SWELLS' USED IN LOOMS FOR WEAVING
Year: 1876

page_text: LETTERS PATENT to Richard Redfern, Joseph Ashworth, and James Green-
wood, all of Todmorden, in the County of York, for the Invention of "IM-
PROVEMENTS IN THE CONSTRUCTION OF 'SWELLS' USED IN LOOMS FOR
WEAVING."
Sealed tho 15th June 1877, and dated the 19th December 1876.
PROVISIONAL SPECIFICATION left by the said Richard Redfern, Joseph
Ashworth, and James Greenwood at the Office of the Commissioners of
Patents on the 19th December 1876.
RICHARD REDFERN, JOSEPH ASHWORTH, and JAMES GREENWOOD, all of Tod-
morden, in the County of York. "IMPROVEMENTS IN THE CONSTRUCTION OF
'SWELLS' USED IN LOOMS FOR WEAVING."
This Invention relates to the construction of the "swells" which are used in the
shuttle boxes of power looms for the purpose of stopping the loom whenever the
shuttle "sticks in the shed," or from any other purpose fails to enter the shuttle
box.
"
Hitherto these "swells" have been hinged by a pin to a bracket at the back of
the shuttle box, and the free end of the swell acted against a finger keyed on the
'stop rod."
Our Invention consists principally in dispensing with the hinge joint altogether,
and in attaching the "swell" by a set screw or in any other rigid manner to the
upper end of the stop rod finger. The bracket and pin are thus dispensed with,
there is no hinge joint to be made, or to require oiling and to endanger the soiling
of the work with black grease; the friction between the "swell" and the stock rod
finger is also dispensed with as the two are fixed rigidly together, and thus the
construction of the "swell " itself is more economical, at the same time that the
above advantages are secured.

page_text: "
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Richard Redfern, Joseph Ashworth, and James Greenwood in the
Great Seal Patent Office on the 19th June 1877.
RICHARD REDFERN, JOSEPH ASHWORTH, and JAMES GREENWOOD, all of Tod-
morden, in the County of York.
"IMPROVEMENTS IN THE CONSTRUCTION OF
'SWELLS' USED IN LOOMS FOR WEAVING."
This Invention relates to the construction of the "swells" which are used in the
shuttle boxes of power looms for the purpose of stopping the loom whenever the
shuttle "sticks in the shed," or from any other purpose fails to enter the shuttle box.
Hitherto these swells have been hinged by a pin to a bracket at the back of the
shuttle box, and the free end of the swell acted against a finger keyed on the
'stop rod."
Our Invention consists principally in dispensing with the hinge joint altogether,
and in attaching the "swell" by a set screw, or in any other rigid manner, to the
upper end of the stop rod finger. The bracket and pin are thus dispensed with ;
there is no hinge joint to be made or to require oiling, and to endanger the soiling of
the work with the black grease; the friction between the "swell" and the stop
rod finger is also dispensed with, as the two are fixed rigidly together, and thus
the construction of the "swell" itself is economical, at the same time that the
above advantages are secured. There is also a saving of power owing to the dis-
pensing with the frictional parts, and further, by doing away with the usual black
oil and grease which becomes clogged both at the pin and at the top of the finger,
the power required to overcome this extra friction is also dispensed with.
Such being the nature and object of our said Invention, we will now proceed to
describe more in detail the manner in which the same is to be or may be performed
or carried into practical effect; and in order that the same may be clearly under-
stood we have annexed hereunto a Sheet of Drawings illustrative thereof, and have
marked the same with figures and letters of reference corresponding with those
in the following explanation thereof :-
Fig. 1 in the annexed Drawing is a back view, and Fig. 2 an end view of the
shuttle box of a loom, showing our Invention as applied thereto.
a, a, is the shuttle box, and b, b, the stop rod finger fixed on the end of the stop rod
b, b, by means of a set screw e. The upper end of this finger d, d, has hitherto pressed
against the back of the hinged swell, being kept against it by the tension of the
coiled spring f, f. Instead of this we form the "swell" g, g, as shown at Fig. 1 and
detached plan view Fig. 3, and we attach it rigidly to the upper end of the stop
rod finger d, d, by means of a set screw h.
The above illustrates the method of applying our Invention to an old loom, but
in the case of a new loom we prefer to cast or otherwise form the stop rod finger
and the swell all in one rigid piece.
Having now described. the nature and object of our said Invention, together with
the manner in which the same is to be or may be performed or carried into practical
effect, we wish it to be understood that we claim as our Invention, attaching the
swell directly and rigidly to the stop rod finger, or casting or otherwise forming the
swell and the stop rod finger in one piece in the manner and for the purposes
herein-before more particularly set forth.
In witness whereof, I, the said James Greenwood (on behalf of myself
and the said Richard Redfern and Joseph Ashworth), have hereunto set
my hand and seal, this Fifteenth day of June, in the year of our Lord
One thousand eighhundred and seventy-seven.