A Warp Thread Stop Motion for Power Looms.
Year: 1891

page_text: Date of Application, 5th Dec., 1891
Complete Specification Left, 3rd Sept., 1892-Accepted, 15th Oct., 1892
PROVISIONAL SPECIFICATION.
A Warp Thread Stop Motion for Power Looms.
I, JOHN HALL, of the firm of Robert Hall and Sons, of Hope Foundry, Bury,
in the County of Lancaster, Engineer do hereby declare the nature of this invention,
which has been communicated to me from abroad by Joseph Tantin, of Flers
de l'Orme, in the Republic of France, Manufacturer, to be as follows:-
In power looms for weaving when a warp thread or warp end breaks it frequently
becomes entangled with the other warp threads or warp ends and produces what is
technically termed a "float." These floats are often the cause of serious faults in
the cloth thereby necessitating the stoppage of the loom to remedy the same and
consequently considerable loss of time is the result.
The essential feature of this invention consists in the arrangement and application
of a warp thread stop motion whereby the immediate and automatic stoppage of
the power loom is effected whenever a float begins to form through the breakage of
a warp thread or threads and consequently before a fault is produced in the cloth.
A convenient arrangement of mechanism for carrying out the invention consists
in a rod passing along the full width of the warp in the back shed and receiving a
regular continuous reciprocating motion from any convenient moving part of the
loom. When a float begins to form the broken threads block the open shed and so
the motion of this rod is arrested and this stoppage is communicated at once by
suitable connections to the weft stop motion of the loom, whereby the loom is
stopped.
Dated this 4th day of December 1891.
H. B. BARLOW,
Agent for Applicant.
COMPLETE SPECIFICATION.
A Warp Thread Stop Motion for Power Looms.
I, JOHN HALL, of the firm of Robert Hall and Sons, of Hope Foundry, Bury, in
the County of Lancaster, Engineer do hereby declare the nature of this invention,
which has been communicated to me from abroad by Joseph Tantin, of Flers.
de l'Orme, in the Republic of France, Manufacturer, and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
In power looms for weaving when a warp thread or warp end breaks it frequently
becomes entangled with the other warp threads or warp ends and produces what is
technically termed a "float." These floats are often the cause of serious faults in
the cloth thereby necessitating the stoppage of the loom to remedy the same and
consequently considerable loss of time is the result.
The essential feature of this invention consists in the arrangement and application
of a warp thread stop motion whereby the immediate and automatic stoppage of
the power loom is effected whenever a float begins to form through the breakage
of a warp thread or threads and consequently before a fault is produced or continued
in the cloth.
A convenient arrangement of mechanism for carrying out the invention consists
in a rod passing along the full width of the warp in the back shed and receiving a
regular continuous reciprocating motion from any convenient moving part of the
loom. When a float begins to form the broken threads block the open shed and so
the motion of this rod is arrested and this stoppage is communicated at once by

page_text: suitable connections to the weft stop motion of the loom whereby the loom is
stopped.
And in order that this invention may be fully understood and readily carried
into effect I will describe the accompanying four sheets of drawings reference being
had to the figures and letters marked thereon.
Fig. 1 is a back elevation, Fig: 2 an end elevation, and Fig. 3 a plan view of part
of a loom to which the warp thread stop motion is applied.
Figs. 4 and 5 are two views of the mechanism for stopping the loom when a
float occurs.
In the drawings-
a designates the loom frame, 6 the crank shaft and c the tappet shaft or stud for
carrying the tappet for actuating the treadles d. The stop motion for the warp
threads e consists of the following parts :-
A rod or plate f is supported by arms a secured to a cross shaft / held in
bearings h¹ on a rail a¹ secured to the loom frame; near one end of the shaft h is
mounted loosely a slotted arm i in which slot rests a pinj which is secured to a
rod k connected below at ¹ to one of the treadles d. On the armi is a projection
or half clutch which engages a corresponding projection on a boss /* fixed on the
shaft on the other end of which is also secured an arm pivoted to one end of, a
rod m which is connected at the other end to an arm n, secured to a cranked rod o
provided with a bill or neb o¹ at its other end, the rod o is mounted on a bracket p
fixed upon the ordinary breast beam lever or weft stop motion lever q pivoted to
the loom frame at q'; on a shaft r, driven continuously from the crank or other shaft,
is a tappet upon which rests one end of a lever s fulcrumed on a stud, the
other end of the lever transmits the motion from the tappet to an arm t also
fulcrumed on the studs and provided with a finger t¹ which moves to and fro, the
spring or starting handle u rests in a slot v in the breast beam of the loom and
is connected to the belt fork w.
8
In operation the rod k is raised and lowered alternately or otherwise as desired
by means of the pin k on the treadle d, the movement of k being conveyed by
the pin in the slotted arm i through the projection and boss * so as to cause the
shaft to oscillate and thereby move the rod f in the shed of the warp towards the
healds, and as the rod k moves downward' with the treadle d the rod freturns to its
position as indicated in Fig. 2, a spring, not shown, being placed in any convenient
part of the connections in order to assist and ensure the return of the rod f to its
proper position these to and fro movements of the rod f continue so long as the
warp threads are straight and the shed is clear; the oscillating motion of the shaft h
is conveyed to a rod o by means of the arm land rod m which in its turn is pivoted
to an arm n secured to the rod o by which means the latter has the same oscillating
or vibrating movement às the shaft h; the rod o is carried by a bracket p fixed on
the breast beam lever or weft stop motion lever g pivoted to the loom frame at q';
the bracket p being caused by the rod o to oscillate or vibrate with each movement
of the shaft h, the free end of the rod o is cranked and has at its end a bill or neb y'.
On the shaft driven from the crankshaft or otherwise is the tappet r¹, see Figs. 4
and 5, the extremity of a levers fulcrumed on a stud ¹ rests freely by its own
weight upon the tappet r¹ and receives from it a regular up and down movement,
which it communicates to an arm t which terminates in a finger t¹: The vibrating
finger t¹ and the vibrating bill o' miss one another so long as, the plate moves to
and fro in the shed; but as soon as the latter is stopped by a float or entanglement
and
in the warp; the shaft remains stationary and with it the parts l, m, n, o, p, 9:
until the following revolution of the shaft r when the tappet lifts the levers s
and t and causes the finger t¹ to come against the bill o', and pressing it pushes, the
which
rodo forward and with it the breast beam lever, or weft stop motion lever
disengages the spring or starting handle u and allows it to spring back in the slot v
and so move the belt shipping lever w and change the driving belt, not shown, from
the fast to the loose pulley thereby stopping the loom before any damage is done to
the cloth.

page_text: It will be readily understood that the details of the invention can be varied
according to the type of loom to which it is applied; for example although a
convenient arrangement of parts is shown for imparting a reciprocating movement
to the rod or plate f any other suitable arrangement may be employed; again the
connections between the reciprocating rod or plate fand the weft stop motion may
be varied or modified as desired without departing from the nature of the
invention.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The combination with the weft stop motion of a loom, of a rod or plate passing
along the full width of the warp in the back shed and receiving a regular continuous
reciprocating movement from the crank shaft or other convenient moving part
until said motion is arrested by the breakage of a warp thread or threads and the
loom is stopped substantially as herein described with reference to the drawings
annexed.
Dated this 2nd den of Cantambon 1900
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicant.