A BRAKE FOR TULLE LOOMS AND SIMILAR MACHINES
Year: 1880

page_text: LETTERS PATENT to Patrick O'Halloran, of High Court Chambers, 28,
Southampton Buildings, Chancery Lane, in the County of Middlesex, Patent
Agent, for an Invention of "A BRAKE FOR TULLE LOOMS AND SIMILAR
MACHINES." A communication from abroad by Auguste Masson, of St. Pierre-
les-Calais, in the Republic of France.
PROVISIONAL SPECIFICATION left by the said Patrick O'Halloran at the
Office of the Commissioners of Patents on the 28th July 1880.
PATRICK O'HALLORAN, of High Court Chambers, 28, Southampton Buildings,
Chancery Lane, in the County of Middlesex, Patent Agent.
"A BRAKE FOR
TULLE LOOMS AND SIMILAR MACHINES." A communication from abroad by
Auguste Masson, of St. Pierre-les-Calais, in the Republic of France.
It often happens that in consequence of a lack in the supply of cards, or by like
accident, the loom suddenly choaks, in consequence of which serious loss may
result unless the weaver be on the spot to instantly stop the loom. It is not an
unusual thing for accidents of this kind to be of so extensive a character as to
cause the stoppage of the loom for several weeks pending the completion of the
necessary repairs. To remove this cause of delay and to render practicable the
instantaneous stoppage of the loom without necessitating the presence of the
weaver the brake hereinafter described has been invented.
The brake consists of a mechanical arrangement of a balance-bar, of a shape and
size adapted to the frame of the loom, and acting in conjunction with a draw-bar
and lever. When there is a deficiency in the supply of cards a stud-catch at the
end of the aforesaid balance-bar drops into a hollow in the periphery of an eccentric
fixed upon the main frame of the loom. The continuous motion of the loom causes
the aforesaid lever to travel or glide upon a cone, and thereby to slip the driving-
belt off the fast pulley. This Invention may also be arranged by means of the
addition of suitable cranks and connecting-rods, so that it can be actuated by the
weaver from either side of the frame.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Patrick O'Halloran in the Great Seal Patent Office on the 28th
January 1881.
PATRICK O'HALLORAN, of High Court Chambers, 28, 'Southampton Buildings,
Chancery Lane, in the County of Middlesex, Patent Agent.
"A BRAKE FOR
TULLE-LOOMS AND SIMILAR MACHINES." A communication from abroad by
Auguste Masson, of St. Pierre-les-Calais, in the Republic of France.
My Invention relates to an improved brake for use with tulle-looms as well as
with such other machines as it is suitable for.
It often happens in the working of a tulle or of a jacquard loom, that in
consequence of a lack in the supply of cards to the latter, or of the bobbin-carriages
of the former springing out of comb-plates, that the loom suddenly chokes and
serious damage may then result, not only to the loom itself, but also to the materials
in process of being woven, unless the loom minder or weaver be present at the time
of the accident to at once stop the loom, and so prevent further mischief. It is of
no uncommon occurrence for accidents of this kind, referred to in the preceding
paragraph, to be of so serious a nature as to incapacitate the loom in which they
happen for several weeks, pending the completion of the necessary repairs. The
object which my correspondent has had in view in perfecting the mechanism which
is the subject matter of this Patent, and rendering it capable of working satis-
factorily as a brake under either of the conditions of accident mentioned above, has
been to obviate the losses occasioned by a loom's becoming choked and damaging
itself and the materials upon which it was operating at the time of the accident
by making it capable of instantaneously and automatically stopping without the
watchfulness or assistance of the minder being in any way depended upon.
My said correspondent's improved brake consists of a mechanical arrangement
of a balance-bar, of a shape and size adapted to the frame of the loom, and acting
in conjunction with a draw-bar or connecting rod and a lever. The balance-bar
is pivotted upon the lever, which latter is held up and prevented from liberating
the brake-strap by a swinging-bar connected in any convenient or well known way
with the grid, or grille, or other equivalent part of the loom. So soon as there occurs
either of the accidents referred to above the swinging-bar releases the brake-lever,
the balance-bar at once applies the brake-strap to the brake-eccentric, whilst a stud
or knuckle on the balance-bar catches in a gap in the periphery of the brake-
eccentric. The draw-bar through the medium of a sliding wedge-block to which
it is fastened, and a connecting-rod carrying the strap-fork slips the driving-belt
off the fast pulley on to the loose pulley. In order that this Invention and the
way in which it is to be put into practice may be clearly understood, reference is
made to the accompanying Sheets of Drawings. These Drawings are furnished
with reference letters, the same.parts of the Invention being indicated throughout
the said Drawings by the same reference letters. It has not been deemed necessary
to detail in the Drawings in this Specification any particular method of connecting
the working parts of either a tulle or a jacquard loom with my said correspondent's
Invention, as such mechanisins are well known, only the. point of junction of such
a mechanisin with my improved brake being indicated.
A is the point of junction of my improved brake with the mechanism of the
loom; B is the swinging-bar; C, the brake-lever; C₁, notch at its upper end to
receive the swinging bar; C2, shoe in which the brake-lever works; D, draw-bar
or connecting-rod; D', sliding wedge-block to which D is fastened; D², sliding

page_text: wedge-block fastened to the strap-fork connecting-rod; D³, point of junction of
draw-bar and brake-lever; E, shelf upon which the blocks D', D2, ride; E¹, E², E³,
a ledge running round the shelf E and serving to keep D¹, D³, in position; F,
connecting-rod connecting D2 with the strap-fork; F, a screw or bolt passing
through a longitudinal slot in E², and fastening D² to F; G, brake-eccentric keyed
upon the shaft which carries the driving pulley; G is the gap in its periphery;
H, balance-bar; H', points of junction of balance bar and brake-lever C; H2,
adjustable weight; H³, stud or knuckle in the balance-bar; H*, brake-strap; I,
brake-bracket; I', blocks to which the brake-strap is bolted. Figure 1 is a side
elevation of one side of a tulle-loom (the driving pulley taken as fixed at the other
side) shewing the improved brake in position at "off;" Figure 2 is an elevation of
brake standing at "off;" Figure 3 is, an elevation of brake standing at "on;"
Figure 4 is a front elevation shewing another arrangement of brake-lever; Figure 5
is a side elevation of Figure 4; Figure 6 is the balance-bar and brake-strap;
Figure 7 is an elevation of brake-bracket; Figure 8 is a plan of brake-bracket,
shewing arrangement of shelf and sliding wedge-blocks; Figure 9 is a plan of brake-
bracket drawn to a larger scale; Figure 10 is an elevation of a jacquard loom,
shewing the application of the improved brake; Figure 11 is a longitudinal
elevation partly in section of the trigger; Figure 12 is a plan of Figure 11;
Figure 13 is a plan of principal support.
The action of the improved brake is as follows:-So soon as anything goes wrong
with either the cards or the bobbins, as described above, the swinging-bar B
releases the brake-lever C, which is at once pulled over by the weight on the
balance-bar H. The connecting-rod (or draw-bar) D pulls the sliding wedge-block
D', and so forces the second block D2 towards the ledge E³. As D2 is connected
by F and F with the strap-fork the driving-belt is at once shifted on to the loose
pulley. Moreover, as the weight H2 falls the brake-strap H is brought to bear
upon the periphery of the brake-eccentric G, and the knuckle H³ lowered, so as to
scotch the brake-eccentric by catching in the gap G2. In Figures 4 and 5 the
brake lever is shewn as fitted with a saddle-shape foot C (in place of the shoe (2)
to which it is pivotted at C³. It connects with the draw-bar D by means of the
reciprocating-bar Co. It is obvious that by inserting in the connecting-rod F a
reciprocating-bar, as Co, Figure 5, the motion of the block D towards the ledge E³
may be to either push or pull the driving-belt off the fast pulley. My corre-
spondent does not confine himself to the exact position of the brake as shewn in
either Figures 1 or 10, as by the use of the necessary cranks, etcetera, the brake may
be fixed wherever may be most convenient. When desirable such loops or guides
as may be required may be used to ensure the several parts of the said Invention
travelling in right lines in the directions prescribed for them by their several
functions. He may use any convenient method of restarting the loom after it has
been stopped by the action of said brake, and of restoring the status in quo of the
several parts of said brake by connecting the block D2 with the setting on (or
slanting) lever or by means of a separate lever fixed at any convenient point.
Having now fully described this Invention as communicated to me by my
correspondent, and how the same is to be carried into effect, I wish it to be
distinctly understood that what I consider new therein, and therefore secured to
me by the hereinbefore in part recited Letters Patent is as set forth in the following
claims:-
First. In a brake for a tulle-loom or similar machine the use of a brake-eccentric
and balance-bar furnished with a knuckle, as and for the purpose hereinbefore
described and illustrated in the accompanying Drawings.
Second. In a brake for a tulle-loom or similar machine the use of two sliding
wedge-blocks, as and for the purpose hereinbefore described and illustrated in the
said Drawings.
Third. In a tulle-loom or similar machine the arrangement of brake-eccentric,
balance-bar, lever, and draw-bar with their several parts and connections, all

page_text: combined and operating substantially and essentially as and for the purpose herein-
before described and illustrated in the said Drawings.
In witness whereof, I, the said Patrick O'Halloran, have hereunto set my
hand and seal, this Twenty eighth day of January, in the year of our Lord
One thousand eight hundred and eighty one.
PATRICK O'HALLORAN. (L.S.