AN IMPROVED SELF-ACTING MACHINERY FOR STOPPING WEAVING LOOMS WHEN A THREAD OF WARP BREAKS
Year: 1876

page_text: LETTERS PATENT to Léon Frey, of the Firm Ferdinand et Th. Frey, of
Guebwiller (Alsace), Manufacturers, for the Invention of "AN IMPROVED
SELF-ACTING MACHINERY FOR STOPPING WEAVING LOOMS WHEN A THREAD OF
WARP BREAKS."
PROVISIONAL SPECIFICATION left by the said Léon Frey at the Office of
the Commissioners of Patents on the 25th November 1876.
LEON FREY, of the Firm Ferdinand et Th. Frey, of Guebwiller (Alsace), Manu-
facturers. "AN IMPROVED SELF-ACTING MACHINERY FOR STOPPING WEAVING
LOOMS WHEN A THREAD OF WARP BREAKS."
This Invention relates to self-acting machinery whereby when one of the warp
threads of a loom breaks the loom is automatically stopped. For this purpose I
hang from each of the warp threads, between their transverse supports, a looped
piece of wire or piece of plate with a long slot in it, the two limbs of the loop or
sides of the slot embracing between them a blade, which serves to guide the piece,
so that it can only move up and down vertically. A number of these looped or
slotted pieces are guided by a single blade, which extends across the loom under
the warp, and a number of such blades being arranged side by side serve to
accommodate the required number of looped or slotted pieces, one for cach warp
thread.
Under the set of blades an arm is made by an eccentric or crank to vibrate to
and fro lengthwise of the loom, and it has a spring or weighted connection to its
motor, which is sufficient to give its usual motion, but which permits it to yield
when the motion is obstructed. When all the warp threads are entire this
vibrating arm at every stroke raises a detent, which is mounted on a sliding bar
connected to the ordinary striking and stopping gear, and which engages with a
lever moved to and fro by a crank cam or eccentric. When the detent is raised
the lever makes its stroke without moving the stopping bar, and consequently
while the warp threads are whole the loom goes on working; but when a warp
thread breaks the looped or slotted piece suspended from it descends in front of
the vibrating arın, and obstructing its movement prevents it from raising the

page_text: detent. The lever thus remaining engaged with the detent on the stopping
bar causes the said bar to slide so as to stop the loom until the broken thread is
repaired and the parts restored to their normal working condition.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Léon Frey in the Great Seal Patent Office on the 23rd May 1877.
LEON FREY, of the Firm Ferdinand et Th. Frey, of Guebwiller (Alsace), Manu-
facturers. "AN IMPROVED SELF-ACTING MACHINERY FOR STOPPING WEAVING
LOOMS WHEN A THREAD OF WARP BREAKS."
This Invention relates to self-acting machinery whereby when one of the warp
threads of a loom breaks the loom is automatically stopped. For this purpose [
hang from each of the warp threads between their transverse supports a looped
piece of wire or piece of plate with a long slot in it, the two limbs of the loop or
sides of the slot embracing between them a blade, which serves to guide the piece,
so that it can only move up and down vertically. A number of these looped or
slotted pieces are guided by a single blade, which extends across the loom under
the warp, and a number of such blades being arranged side by side serve to
accommodate the required number of looped or slotted pieces, one for each warp
thread.
Under the set of blades an arm is made by an eccentric or crank to vibrate to
and fro lengthwise of the loom, and it has a spring or weighted connection to its
motor, which is sufficient to give its usual motion, but which permits it to yield
when the motion is obstructed. When all the warp threads are entire this
vibrating arm at every stroke raises a detent which is mounted on a sliding bar
connected to the ordinary striking and stopping gear, and which engages with n
lever moved to and fro by a crank, cam, or eccentric. When the detent is raised
the lever makes its stroke without moving the stopping bar, and consequently
while the warp threads are whole the loom goes on working; but when a warp
thread breaks the looped or slotted piece suspended from it descends in front of
the vibrating arm, and obstructing its movement prevents it from raising the
detent. The lever thus remaining engaged with the detent on the stopping bar
causes the said bar to slide so as to stop the loom until the broken thread is repaired
and the parts restored to their normal working condition.
Fig. 1 shews diagrammatically the parts of a loom with the before-described self-
acting stopping motion applied thereto; Fig. 2 shews a part plan of the transverse
bars with the loops thereon; and Figs. 3 and 4 shew enlarged front and side views
of a loop and transverse bar.
Tare the fixed transverse bars serving as guides to the looped or forked pieces F
that are closed at the upper end and open or closed at the lower end, one of which
is suspended from each warp thread by any convenient connection L. The loops F
may be of wire or any suitable material, but by preference they are stamped out
of sheet metal, of the form shewn at Figs. 3 and 4. The transverse guide bars T
are carried at the ends in notched supports P, and the loops F are arranged thereon
in oblique positions, as shewn at Fig. 2. Each warp thread coming from the
beam C and led over the guide roller A passes through one of the attachments L,
and is then supported by the bar B on its way to the harness. If the warp threads
are all in proper order the loops F are all suspended in the positions shewn at F, F,
but if one or more of the warp threads should break the loops fall from that
position to the position shewn at E1, Fig. 1, and at Figs. 3 and 4, in which position
the loop is supported by the guide bar.

page_text: Below the guide bars T is an arın G, which receives a to-and-fro motion by
means of a crank Q, which motion is interrupted on a loop falling into the
position F by the arm G coming in contact therewith. At each end of its move-
ment the arm G acts either directly or indirectly upon the catch M, hinged at m to
the bar N, thereby raising it so as to bring it out of reach of a lever H pivotted
at I, and held by a spring against a stop P, and receiving a slight periodical move-
ment by means of the tappet or cam K. If now the movement of G be arrested
by the fallen loop F', as described, it will fail to raise the catch M, and consequently
this will be acted upon by the lever H, which will thereby push the bar N so as to
actuate the detent V that effects the stopping of the loom. The connection of the
crank Q to the arm G is such that it will readily give way without fracture so, as
to allow of the continued notion of tho crank when the arm is arrested.
Having thus described the nature of my Invention and in what manner the
same is to be performed, I claim in respect of apparatus for automatically stopping
the motion of a loom on the breaking of a warp thread,
2.
First. The arrangement of the loops F suspended from the warp and placed upon
the guido bar T, so that on a thread breaking they fall and arrest the motion of an
arm forming part of the stopping gear, substantially as herein described.
Second. The arrangement of the reciprocating arm G, operating in combination
with the hook M. and lever H, so that on the falling of one of the loops F'the
arm G, in being arrested, causes the hook to be actuated by the lever, substantially
as hercin described.
In witness whereof, I, the said Léon Frey, have hereunto set my hand
and seal, this Fifth day of. May, in the year of our Lord One thousand eight
und and cavanty-seven.
Witness,
CH. ARMENGAUD,
Civil Engineer,
Bd. de Strasbourg, 23, Paris.
LÉON FREY. (L.S.)