IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1879

page_text: LETTERS PATENT to John Brownhill, of Denby Dale, near Huddersfield, in
the County of York, for the Invention of "IMPROVEMENTS IN LOOMS FOR
WEAVING."
Sealed the 2nd March, 1880, and dated the 3rd September 1879.
"
PROVISIONAL SPECIFICATION left by the said John Brownhill at the Office
of the Commissioners of Patents on the 3rd September 1879.
JOHN BROWNHILL, of Denby Dale, near Huddersfield, in the County of York,
'IMPROVEMENTS IN LOOMS FOR WEAVING."
A
This Invention relates to the apparatus for operating the healds and the object
thereof is to render the healds independent of each other instead of baving them
connected as at present.
With this object I dispense with the skips and bowls hitherto employed for
connecting the bottom shafts of the healds, and substitute instead a series of
tongues or levers mounted upon a rod or short shaft supported by a suitable frame
fixed underneath the loom. The ends of these levers are attached to the heald
shafts, and to the underside of each lever about the middle thereof is connected a
cord terminating with a short spiral spring, which springs are secured to the
frame.
These springs keep the healds in a state of tension, and allow them to be raised
the usual distance, though the springs themselves are only slightly extended.
In order to counterbalance the weight of the type, treading rods, and treadles,
each jack rod is furnished with a weighted arm. By my Invention, greater
regularity of weaving is obtained, and a considerable saving of power is effected,
also a saving of labour and healds. The same apparatus is adapted for any number
of healds from two to twenty.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Brownhill in the Great Seal Patent Office on the 3rd March
1880.
JOHN BROWNHILL, of Denby Dale, in the County of York, Manufacturer.
"IMPROVEMENTS IN LOOMS FOR WEAVING."
This Invention relates to the apparatus for operating the healds, and the object
thereof is to render the healds independant of each other instead of having them
connected as at present.

page_text: :
With this object I dispense with the skips and bowls hitherto employed for
connecting the bottom shafts of the healds, and substitute a series of tongues or
levers mounted upon a rod or short shaft supported by a suitable frame fixed under-
neath the loom. The ends of these levers are attached to the healḍ shafts, and to
the underside of each lever about the middle thereof is connected a cord terminating
with a short spiral spring, which springs are secured to the frame. These springs
keep the healds in a state of tension, and allow them to be raised the usual distance,
though the springs themselves are only slightly extended.
In order to counterbalance the weight of the type, treading-rods, and treadles,
each jack-rod is furnished with a weighted arm. By my Invention, greater
regularity of weaving is obtained, and a considerable saving of power is effected
also a saving of labour and healds. The same apparatus is adapted for any number
of healds from two to twenty.
In order that my Invention may be more fully understood, I herein give reference
to, the accompanying Sheets of Drawings illustrative thereof. Fig. 1 is an end eleva-
tion of a loom with portions of framework broken away to shew interior mechanism.
Fig. 2 is front elevation, and Figs. 3, 4, and 5, are details.. Underneath the loom
are two frames or castings A, and on a shaft or axis B, carried by each of the said
frames are mounted a series of tongues or levers C. The ends of the levers C are
attached to the heald shafts D by cords E. At the point a on the underside, each
lever is connected to a spiral spring F, the two series of springs being fastened to
rods F, passing from side to side of the frame. These springs keep the healds in a
state of tension, and although allowing them to move the usual distance are not.
themselves very much extended whereby they retain their elasticity for a long time
without being weakened. In Fig. 5 I have shewn how a flat spring G may be
used instead of a spiral spring, the flat spring being so placed as to act upon the
top side of the lever C.
In order to counterbalance the weight of the type, treading-rods, and treadles,
each jack rod H is provided with a weight J, which may be placed at a variable
distance from the fulcrum C.
Having thus described the nature of my Invention, and shewn the manner in
which the same is to be performed, I would have it understood that I do not confine
myself to the exact details of the mechanism herein shewn and described as the same
may be varied without departing from the Invention, but what I consider to be
new, and therefore claim is,―
Firstly. The employment of springs F and G, and levers C, in combination with
the weighted jack rods H, as and for the purpose herein shewn and described.
Secondly. The parts F, G, and C, when used in manner and for the purpose
substantially as herein shewn and described.
In witness whereof, I, the said John Brownhill, have hereunto set my hand
and seal, the Twenty-eighth day of February, in the year of our Lord One
thoricand night bundred and sight
Witness,
JAMES BROWNHILL.
JOHN BROWNHILL. (L.S.)