IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1877

page_text: PROVISIONAL SPECIFICATION left by William Holroyd and George
Frederick Holroyd at the Office of the Commissioners of Patents on the
19th December 1877.
WILLIAM HOLROYD and GEORGE FREDERICK HOLROYD, both of Parkside Road
Works, in Bradford, in the County of York, Manufacturers. "IMPROVEMENTS IN
LOOMS FOR WEAVING."
The object of our Invention is to dispense with the use of what is commonly
known as the Wytch engine, now used in the manufacture of light piece goods, and
to arrange the loom in such a manner that our improved apparatus will be more
certain in its action of regulating the healds and warp ends to form the pattern
required, and to relieve the tension of the healds and warp ends when lifting to
form the "shed," and thus the strength of the warp is preserved, and the healds
will last much longer than when used in the ordinary manner; at the same time we
are enabled to run the loom at a greater speed, and consequently produce a
corresponding increase in the quantity of cloth woven. We accomplish our object
in the following manner:-We fix to the end of the loom a revolving cylinder,
similar to the jacquard cylinder; this cylinder has a number of pins projecting from
the side of the same, and motion is imparted to the cylinder by means of a rod that
is attached to the tappet lever; this lever is worked in the ordinary manner by
means of a single or double tappet; this tappet lever gives an intermittent vertical
motion to the aforesaid rod, which acts upon one of the pegs or pius in the side of
the cylinder, and causes the same to revolve; the cylinder is kept in position by
means of a spring until it is actuated by the next vertical movement of the aforesaid
rod. Upon the circumference of this said cylinder are fixed a number of pegs; these
pegs actuate a series of light levers that are mounted on a stud; near to one end of
these levers we cut a slot hole, through each of which we pass a rod that is
attached to the jack rod levers.
When one of the pegs in the circumference of the cylinder actuates one of the
light levers, it will cause the rod passing through the same to move into such a
position that the tappet lever will actuate the jack rod and healds that are
connected therewith, and thus move the heald and ends of warp required. We fix
a lever that is in connection with the pegs or pins that project from the side, in
[Price 2d

page_text: order that the attendant can reverse the cylinder, when required, to rectify any
irregularities in the piece.
We relieve the tension of the healds and warp ends by means of tappets that are
fixed to the framework near the bottom of the loom; to each set of healds we attach
a tappet connected therewith at each end of the same, and to a spring that is
placed between the two tappets; these tappets are so arranged that when the
healds lift up, the tension of the spring is released, and thus the stress or power
required to lift the healds is reduced. These tappets are also attached to the levers
of the back rod that is used as an easer, for the purpose of relieving the tension of
the warp, when the warp requires to be duped to form the figure in the piece.