Improvements in Weft Stop Motions of Looms for Weaving.
Year: 1893

page_text: Date of Application, 19th Oct., 1893
Complete Specification Left, 13th July, 1894-Accepted, 18th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in Weft Stop Motions of Looms for Weaving.
We, JOHN BROADHEAD, of 40, Türrschmidt Strasse, Rummelsburg, Berlin, in
the Empire of Germany, Weaving Master, and JOHN WILLIAM SCHOFIELD, of.
7, Prince Albert Strasse, Rummelsburg, Tuner, do hereby declare the nature of
this invention to be as follows:-
י
This invention has reference to that class of weft stop motion fixed about
midway of the slay and where the weft fork or feelers oscillate up and down within
a recess formed in the top of the slay board.
In constructing a weft stop motion according to our invention we mount the
feelers in a suitable bracket secured in front of the slay board or "going part." To
this bracket is pivotted a cam plate connected by a short vertical arm and
horizontal rod to a stud attached to a bracket fixed to the breast beam, the
operation being such, that each time the slay board moves backwards and forwards
the vertical arm and horizontal rod causes the cam plate to oscillate up and down,
the upward movement raises the feelers into a vertical position, the cam also
brings the feelers down until they rest upon the weft, the tail piece at this move-
ment being free in the slot of the cam and there is nothing but the weight of the
feelers upon the weft and under these conditions the loom proceeds, but if there be
no shoot of weft lying on the slay board the feelers drop into the bottom of the
groove cut therein, the effect of which is that a sneck in the pirotted cam would be
caught by the tail projecting from the boss of the feelers, consequently, the dagger
on the said cam would remain in a direct line with the stop rod mechanism, against
which it would strike in such a manner as to stop the loom. The pivotted plate
moving up and down in front of the slay board is made with peculiar shaped slotted
cams or openings so that the said plate in its upward movement will raise the
feelers and also bring the feelers down, and if weft is present the cam plate drops.
to its lowest position placing the dagger lower than the stop rod mechanism against
which it does not strike, but if weft be absent the plate is caught by the tail on the
heel of the feelers and held opposite the stop rod mechanism whereby the loom is
stopped.
The stud on the breast beam to which the connecting arm is attached is main-
tained in a certain position by a spring, but if any of the parts became locked the
spring would yield and so prevent a breakage.
The invention above described is adapted for either quick running looms or slow
looms and will be found quick in action and positive in all its movements.
Dated this 18th day of October 1902
TASKER & CROSSLEY
Halifax, Agents.
Halifax, Agents.
COMPLETE SPECIFICATION.
Improvements in Weft Stop Motions of Looms for Weaving.
We, JOHN BROAdhead, of 40, Türrschmidt Strasse, Rummelsburg, Berlin, in
the Empire of Germany, Weaving Master, and JOHN WILLIAM SCHOFIELD, of
7, Prince Albert Strasse, Rummelsburg, aforesaid, Tuner, 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 has reference to that class of weft stop motion fixed about
I Price xd l

page_text: midway of the slay and where the weft fork or feelers oscillate up and down within
a recess formed in the top of the slay board.
In order that our invention may be more clearly understood, we will make
reference to the accompanying sheet of drawings, wherein
Fig. 1 is a plan view of our improved arrangement of weft stop motion, Fig. 2
is front elevation of same and Fig. 3 an end view partly in section.
The three figures just enumerated shew the position which the mechanism
occupies when the weft is absent and the feelers a are down within the groove b in
the slay board c whilst Figs. 4 and. 5 shew the feelers a in an elevated position
which is the position occupied when the shuttle is passing through the shed.
The feelers a are mounted in a suitable bracket d secured in front of the slay
board or "going part" c. To this bracket d is pivoted a cam plate e connected by
a short vertical arm fand horizontal rod g to a stud h attached to a lever i fixed
to the breast beam j, the operation being such that each time the slay board moves
backwards and forwards the vertical arm fand horizontal rod 9 causes the cam
plate e to oscillate up and down on the face of the slay board the upward movement
raising the feelers a into a vertical position whilst the opposite movement of the
cam plate e allows the feelers to descend until they rest upon the weft if present,
or if absent to descend into the groove 6 into the slay board.
On reference to the drawings it will be seen that the heel of the feelers is
provided with a tailpiece k which enters the cam slot in the oscillating plate e.
When the feelers are down, the tailpiece is resting upon the lower part of the
cam slot and as the cam plate ascends the tailpiece together with the feelers
ascend, but when the cam plate commences to descend, the tailpiece forces the
feelers down until they rest upon the weft if present, whereupon the loom proceeds
but if there be no shoot of weft lying on the slay board, the feelers drop into the
bottom of the groove cut therein, the effect of which is, that a sneck m in the cam
groove would be caught by the tailpiece, consequently the dagger n projecting
from the oscillating cam plate e would remain in a direct line with the stop rod o,
against which it would strike in such a manner as to throw the strap from the fast
to the loose pulley, and thus stop the loom. If however weft be present the
dagger n would occupy a position above the stop rod and thereby prevent the loom
being stopped. The short lever i arranged under the breast beam, to which the
connecting rod g is attached, is maintained in position by a spring p, but if any of
the parts became locked the spring would yield so as to prevent a breakage.
Figs. 6 and 7 illustrate two opposite sides of the oscillating cam plate c.
The invention above described is adapted to be used for either quick running
looms or slow looms, the mechanism being quick in its action and positive in all its
movements.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
In a weft stop motion the use of the oscillating slotted cam plate e provided with
a dagger n in combination with tailpiece k and feelers a, the latter being operated
by connecting rod g, all arranged as described.
Dated this 12th day of July 1894
TASKER & CROSSLEY,
Halifax, Agents.