An Improved Weft-breaking Device for Loom Shuttles for Stopping the Loom upon the Occurrence of Warp Floats or Defective Picking.
Year: 1891

page_text: Date of Application, 10th Mar., 1891
Complete Specification Left, 10th Dec., 1891-Accepted, 16th Jan., 1892
PROVISIONAL SPECIFICATION.
An Improved Weft-breaking Device for Loom Shuttles for Stopping
the Loom upon the Occurrence of Warp Floats or Defective
Picking.
I, ROGER CHARNLEY, of 2, Havelock Street, Preston, in the County of
Lancaster, Weaving Manager do hereby declare the nature of this invention to
be as follows:-
This invention relates to an improved weft-breaking device for loom shuttles for
stopping the loom when the shuttle meets a "float in the shed, and consists in
providing the upper side of a shuttle with a long wire spring (hereinafter termed
the "depressor wire") fastened at one of its ends to the shuttle near to that end
thereof at which the shuttle peg is jointed the free end of the said depressor wire
entering a hole in a flat pivotted arm or blade capable of moving in a plane at
right angles to the depressor wire. The pivotted end of the arm or blade adjoins
(and in its horizontal or normal position fits and is held squarely thereupon) a thin
flat metal spring (hereinafter termed the "back spring ") and is made with a short
finger or catch which (when the arm or blade is pressed downwardly by the
depressor wire as hereinafter described) slips into a notch in the back spring and is
firmly held or retained in its downward position until the pressure of the back
spring is withdrawn. The pivotted arm or blade stands over and somewhat in
front of the point of the shuttle peg and the body of the shuttle below the arm or
blade is cut out so as to leave a slot or narrow opening into which the arm or blade
enters when moved downwardly. The depressor wire is bent or curved so as to
stand convexly somewhat above the upper side or edge of the shuttle the latter
having a correspondingly curved or concavely recessed part opposite to the convex
curve of the depressor wire.
The action of the apparatus above described is as follows:-When the shuttle in
its passage through the shed meets a float or other obstruction the pressure of the
warp yarn or threads in which the float occurs compresses the depressor wire which
thereupon moves the pivotted arm or blade downwardly into the slot in the lower
part of the shuttle the said arm or blade meeting and taking down with it into the
slot the weft thread which thus becomes trapped and immediately breaks whereupon
the loom is stopped through the medium of the ordinary weft-fork stop motion
apparatus in the usual way, the pivotted arm or blade remaining locked in its
downward position in the slot until the pressure of the back spring has been
withdrawn whereupon the pivotted arm or blade will resume its normal or
horizontal position over and free of the weft-thread by the upward spring of the
depressor wire.
The improved device as above described is also applicable for breaking the weft
thread when the shuttle "kicks" or jumps upwardly during its passage through
the shed the pressure of the upper threads of the shed compressing or pressing
downwardly the depressor wire and operating the device in the manner herein-
before described.
Dated thin 10th SML 1001

page_text: COMPLETE SPECIFICATION.
An Improved Weft-breaking Device for Loom Shuttles for Stopping
the Loom upon the Occurrence of Warp Floats or Defective
Picking.
I, ROGER CHARNLEY, of 2 Havelock Street, Preston, in the County of
Lancaster, Weaving Manager, do hereby declare the nature of this invention and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
This invention relates to an improved weft-breaking device for loom shuttles for
stopping the loom when the shuttle meets a "float"in the shed, and consists in
providing the upper side of a shuttle with a long wire spring (hereinafter termed
the "depressor wire") fastened at one of its ends to the shuttle near to that
end thereof at which the shuttle peg is jointed the free end of the said
depressor wire entering a hole in a flat pivcted arm or blade capable of
moving in a plane at right angles to the depressor wire. The pivoted end
of the arm
or blade adjoins (and in its horizontal or normal position fits and
is held squarely thereupon) a thin flat metal spring (hereinafter termed the
"back spring") and is made with a short finger or catch which (when the arm
or blade is pressed downwardly by the depressor wire as hereinafter described)
slips into a notch in the back spring and is firmly held or retained in its downward
position until the pressure of the back spring is withdrawn. The pivoted arm or
blade stands over and somewhat in front of the point of the shuttle peg and the
body of the shuttle below the arm or blade is cut out so as to leave a slot or narrow
opening into which the arm or blade enters when moved downwardly. The
depressor wire is bent or curved so as to stand convexly somewhat above the upper
side or edge of the shuttle the latter having a correspondingly curved or concavely
recessed part opposite to the convex curve of the depressor wire.
The action of the apparatus above described is as follows:-When the shuttle
in its passage through the shed meets a float or other obstruction the pressure of the
warp yarn or threads in which the float occurs compresses the depressor wire which
thereupon moves the pivoted arm or blade downwardly into the slot in the lower
part of the shuttle the said arm or blade meeting and taking down with it into the
slot the weft thread which thus becomes trapped and immediately breaks whereupon
the loom is stopped through the medium of the ordinary weft-fork stop motion
apparatus in the usual way, the pivoted arm or blade remaining locked in its
downward position in the slot until the pressure of the back spring has been
withdrawn whereupon the pivoted arm or blade will resume its normal or horizontal
position over and free of the weft-thread by the upward spring of the depressor
wire.
"
The improved device as above described is also applicable for breaking the weft
thread when the shuttle " kicks or jumps upwardly during its passage through
the shed the pressure of the upper threads of the shed compressing or pressing
downwardly the depressor wire and operating the device in the manner hereinbefore
described.
In the accompanying drawings
Fig. 1 is a side view partly in section and
Fig. 2 a plan view of a loom shuttle having my said improved weft-breaking
device applied thereto.
Figs. 3, 4 and 5 are cross sectional views of the same drawn to a larger scale
shewing the arrangement of the said weft-breaking device in end view.
a is the shuttle & the weft thread c the depressor wire d the pivoted arm or blade
working on the pivot i and having a hole e through which the free extremity of the
depressor wire c passes (see Fig. 2). The pivoted arm or blade d is made preferably
of thin sheet steel and has a hook or catch (see Figs. 3, 4 and 5) which when the

page_text: blade d is pressed down as shewn at Fig. 3 takes into a slot or opening in the back
spring 9 and thereby becomes locked.
g
When the pivoted arm'd is to be released
so as to enable it to return to its normal position as shewn at Fig. 4 the back
spring is pressed or sprung back by hand so that the hook or catch may be clear
of or liberated from the slot. The back spring g is formed in one piece with the
plate being bent at right angles thereto as shewn. The plate carries the pin i
on which the arm or blade d is pivoted and may be fastened in place in the shuttle
by means of screws as shewn at Figs. 3, 4 and 5.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is :-
The combination with a loom shuttle and a depressor wire such as c of a pivoted
arm or blade such as d arranged to be moved downwardly in a vertical plane by
the downward pressure of said depressor wire and a back spring for locking or
holding the said arm or plate when down substantially as described and shewn in
the drawings for the purpose set forth.
Dated this 10th d... of D
1001
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.