IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1872

page_text: LETTERS PATENT to Edward Louis Paraire, of Mornington Crescent,
Regent's Park, in the County of Middlesex, Architect and Civil
Engineer, for the Invention of "IMPROVEMENTS IN LOOMS FOR
WEAVING."
Scaled the 9th July 1872, and dated the 16th January 1872.
PROVISIONAL SPECIFICATION left by the said Edward Louis Paraire
at the Office of the Commissioners of Patents, with his Petition, on
the 16th January 1872.
I, EDWARD LOUIS PARAIRE, of Mornington Crescent, Regent's Park,
in the County of Middlesex, Architect and Civil Engineer, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN LOOMS FOR
WEAVING," to be as follows:-
The object of the said Invention is to open by impact the valves or
other contrivances in looms in which the shuttle is thrown by the agency
of compressed air. To this end I have designed a novel arrangement
which consists of a tumbler, a raiser, a striker, and a throw-off. These

page_text: various parts are fixed as most convenient to the frame of the loom, and
are of no special form or design. The tumbler is depressed by a cam of
any form attached to any appropriate working part of the loom, or such
other as may be so provided, whereby the tumbler is depressed at one
extremity while the other elevates the raiser, which is thus brought in
contact with the striker. The momentum of the raiser being conveyed
or transmitted to the striker is thrown off by the throw-off, and the
striker is left free. The momentum thus conveyed to the striker is spent
either directly or indirectly on the part or parts of the contrivance as are
now in use for opening the valves, or on the valve itself. The point of
impact at which the blow is delivered being so designed and arranged as
to take place on the retrograde motion of the sley beam or other moving
parts of the loom. The combination is kept in position and regulated
by stops, springs, and other contrivances placed as may be found most
convenient.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Louis Paraire in the Great Seal Patent
Office on the 16th July 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
LOUIS PARAIRE, of Mornington Crescent, Regent's Park, in the County
of Middlesex, Architect and Civil Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Sixteenth day of January, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Edward Louis Paraire, Her special licence
that I, the said Edward Louis Paraire, my executors, administrators, and
assigns, or such others as I, the said Edward Louis Paraire, 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, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN LOOMS FOR
WEAVING," upon the condition (amongst others) that I, the said
Edward Louis Paraire, my executors or administrators, by an instru-

page_text: ment in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature 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 Edward Louis Paraire, do hereby
declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in
and by the following statement:-
My Invention relates to the effecting a saving of the compressed air
in throwing the shuttle across the sley beam in looms for weaving in
which the shuttle is actuated by compressed air in accordance with my
Patent dated the Fourth December One thousand eight hundred and
sixty-six, and in which the air is compressed into a common receiver and
conveyed from thence by pipes to the valves fixed at the extremitics of
the sley, and in which the valves are at the moment of the pick caused
to open by means of a combination of mechanical parts which are more
or less rapid in their action, and consequently allow more or less com-
pressed air to escape and be thrown on the shuttle. Now, as the valves
are fixed to the sley beam and are carried backward and forward by its
motion, I find that there is in the looms which I have described a
retardation of the action of the mechanical contrivances by which the
valves are opened, and there is in consequence a waste of the compressed
air which prejudicially affects the throw of the shuttle. This saving
of the compressed air is effected by a combination of mechanical parts
so arranged as to produce a free blow without any drag, dwell, or
following action for the purpose of opening by percussion the valves or
other contrivances used to release the compressed air.
The mode in which this combination of mechanical parts is effected
is described in the following statement and in the Drawings therein
referred to.
The tumbler is depressed by a cam which is attached to any appropriate
working part of the loom, and is so constructed as to depress the
tumbler suddenly at one extremity, while the other extremity to which
the raiser is attached is elevated, thereby bringing the top of such
misor A R into sudden contact with the striker The momentum.

page_text: imparted to the raiser is thus conveyed to and absorbed by the striker.
An inclined surface or raiser at c, d, then comes in contact with the
throw-off wheel e, by which the top of the raiser is pushed forward
to a¹, b', and thus freeing the striker and leaving it ready for the next
blow.
The momentum imparted to the striker is suddenly conveyed to the
valves so as to cause their instantaneous opening without drag, dwell, or
retardation of action.
I so design the part of the striker g, h, that in delivering the blow
the impact takes place on the retrogade motion of the sley beam.
The throw-off being fixed I regulate the action of the raiser by means
of the screw i acting against the raiser on the surface c, d.
I keep the parts in their respective positions by stops, springs, and
other contrivances as may be found most convenient.
Now having described the nature of my said Invention, and in what
manner the same is performed, I declare that I do not confine myself to
the details herein given, inasmuch as they may be, and must be, varied
to suit looms of various constructions, which may be accomplished
without departing from the main feature as the peculiar character of my
Invention. What I claim is, the instantaneous opening of valves in
looms wherein the shuttle is actuated by compressed air by the com-
munication of a free blow, such free blow being obtained by a
combination of machinery, substantially as herein-before described.
In witness whereof, I, the said Edward Louis Paraire, have hereunto
set my hand and seal, this Sixteenth day of July, in the year of
our Lord One thousand eight hundred and seventy-two.
EDWARD L. PARAIRE. (L.S.)