AN IMPROVED APPARATUS FOR DRIVING OR GIVING MOTION TO POWER LOOMS, WHICH SAID IMPROVEMENT IS ALSO APPLICABLE TO DRIVING OTHER MACHINERY
Year: 1857

page_text: LETTERS PATENT to John Robinson, of Glossop, in the County of
Derby, Manager, for the Invention of "AN IMPROVED APPARATUS FOR
DRIVING OR GIVING MOTION TO POWER LOOMS, WHICH SAID IMPROVEMENT IS
ALSO APPLICABLE TO DRIVING OTHER MACHINERY."
PROVISIONAL SPECIFICATION left by the said John Robinson at the
Office of the Commissioners of Patents, with his Petition, on the
7th April 1857.
I, JOHN ROBINSON, of Glossop, in the County of Derby, Manager, do
hereby declare the nature of my said Invention for "AN IMPROVED APPARATUS
FOR DRIVING OR GIVING MOTION TO POWER LOOMS, WHICH SAID IMPROVEMENT IS
ALSO APPLICABLE TO DRIVING OTHER MACHINERY," to be as follows:-
My Invention relates to the "fast and loose" pulleys round which the
driving strap passes, and by which the loom is put in motion or stopped, and
is intended to accomodate or adjust the driving to the different motions of
the loom, and considerably to prevent the slipping of the driving strap. The
improvement consists in the employment of one pulley only, which is capable
of revolving loosely as a "loose pulley, or with the shaft as a fast or driving
pulley." Near one end of the driving shaft of the loom (for example) is secured
a flange or plate, upon which is formed a bush, fitting on to the said shaft

page_text: and upon which bush the driving pulley revolves freely or loosely when the
action of the loom is not required. A similar plate or flange is placed on the
other side of the pulley (the pulley being between the two), having also a
bush or collar, so as to enable the said plate to slide freely upon the shaft to
and from the side of the pulley, but keyed upon and revolving with the shaft ;
behind this bush is situated a spiral or other spring, exerting pressure against
the said plate and a collar upon the shaft.
It will now be understood that when the spring is compressed and the
plate drawn from the side of the pulley (by means of a lever or otherwise)
that the pulley will revolve upon the bush, after the manner of an ordinary
loose pulley, and motion will cease to be given to the loom, but upon the spring
being released it will force the plate again into contact with the pulley, which
will then act as a fast or driving pulley, by which the loom will be again set
in motion. It will be evident that this apparatus is equally applicable in
all instances where "fast and loose" pulleys are employed, but is more par-
ticularly adapted to looms and other similar machinery.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Robinson in the Great Seal Patent Office on the
5th October 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
ROBINSON, of Glossop, in the County of Derby, Manager, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of April, in the year of our Lord
One thousand eight hundred and fifty-seven, in the twentieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said John Robinson, Her especial licence that I, the said John Robinson, my
executors, administrators, and assigns, or such others as I, the said John
Robinson, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, tho
Channel Islands, and Isle of Man, an Invention for "AN IMPROVED APPA-
RATUS FOR DRIVING OR GIVING MOTION TO POWER LOOMS, WHICH SAID IMPROVEMENT
IS ALSO APPLICABLE TO DRIVING OTHER MACHINERY," upon the condition, amongst
others, that I, the said John Robinson, by an instrument in writing under
my hand and seal, should particularly describe and ascertain the nature

page_text: of the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said John Robinson, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement and accompanying Drawings (that is to say):-
My Invention relates to the "fast and loose" pulleys round which the
driving strap passes, and by which the loom is put in motion or stopped, and
is intended to accommodate or adjust the driving to the different motions of the
loom, and considerably to prevent the slipping of the driving strap. The
improvement consists in the employment of one pulley only, which is capable
of revolving loosely as a "loose pulley," or with the shaft as a fast or driving
pulley. Near one end of the crank or driving shaft of the loom, for example,
is secured a flange or plate, upon which is formed a bush, fitting on to the said
shaft, and upon which bush the driving pulley revolves freely or loosely when
the action of the loom is not required. A similar plate or flange is placed on
the other side of the pulley (the pulley being between the two), having also a
bush or collar, so as to enable the said plate to slide freely upon the shaft to
and from the side of the pulley, but keyed upon and revolving with the shaft;
behind this bush is situated a spiral or other spring, exerting pressure against
the said plate and a collar upon the shaft.
It will now be evident that when the spring is compressed and the plate
drawn from the side of the pulley (by means of a lever or otherwise), that
the pulley will revolve upon the bush, after the manner of an ordinary loose
pulley, and motion will cease to be given to the loom, but upon the spring
being released it will force the plate again into contact with the pulley which
will then act as a fast or driving pulley, by which the loom will be again set
in motion. It will be understood that this apparatus is equally applicable
in all instances where "fast and loose" pulleys are employed, but is more
particularly adapted to looms and other similar machinery.
In order that the Invention may be more readily understood and explained
in detail, I have hereunto annexed a Sheet of Drawings, made about half the
real size, Fig. 1 being illustrative of the simplest and most approved form of
apparatus adapted for looms, and being shewn as applied thereto.
In Fig. 1, a is the crank or driving shaft, and 6 is a bush or collar secured
thereupon, the spring c being compressed between such collar and the boss d'
of the plate or flange d; the boss and flange are internally grooved, and slide

page_text: upon the shaft and revolve with it by the key or stud e, fitting into such groove.
f is the driving pulley, revolving loosely upon the shaft, and not giving motion
to the loom when disconnected from the plate or flange; g is a lever in con-
nection with the spring handle of the loom, which when the handle is moved
to set the loom in motion allows the spring ċ to force the plate d against the
revolving pulley f, and thus motion is communicated to the crank shaft, and
the spring handle being employed to stop the loom causes the lever to draw
the plate from the pulley, and by such disconnection stop the loom.
Having now described the nature of my said Invention, together with the
most approved method of performing the same, I would remark, in conclusion,
that I claim the novel and peculiar construction and arrangement of apparatus
as applied for driving or giving motion to power looms, being also applicable
to driving other machinery, as herein-before described, set forth, and par-
ticularly exhibited in the Drawings hereunto annexed.
In witness whereof, I, the said John Robinson, have hereunto set my
hand and seal, this Third day of October, in the year of our Lord
One thousand eight hundred and fifty-seven.
JOHN ROBINSON. (L.S.)