Improvements in Automatic Stopping and Re-starting Mechanism for Looms Acting on Failure of Weft.
Year: 1899

page_text: Date of Application, 20th June, 1899-Accepted, 17th Már., 1900
Improvements in Automatic Stopping and Re-starting Mechanism for
Looms Acting on Failure of Weft.
I, EZEKIEL GODDARD CRANESHAW, of No. 36, Prescott Street, City of Lowell,
County of Middlesex, and State of Massachusetts, U.S.A., Mechanic, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
The invention relates to stopping and starting mechanism for looms, and is
designed to be used in connection with looms having a filling changer in which
the filling is supplied automatically upon the breakage of the filling or the
exhaustion of the same. This may be done, as at present, either by supplying
a new bobbin to the shuttle running in the loom or by a new shuttle contained
in a hopper attached to the loom. In all forms at present used these opera-
tions are performed during the running of the loom by the action, of the filling
fork bringing into operation a plunger to either replace the bobbin or the
shuttle.
Due to the speed of the loom, the time allowed for the supplying of a new
bobbin or shuttle is very short and the change has to be made with lightening
rapidity, involving very accurate setting and great wear on the operative
parts of the changing mechanism.
To obviate these objections and to provide an easy operating mechanism, I
provide a stopping mechanism which is only brought into, operation by the
action of the weft-fork which is governed by the weft thread in the same
manner as the ordinary loom and in all its operations and uses performs the
same result as the ordinary loom, (eiz.; stops the loom), but at the same time
it releases a catch and starts a supplementary driving apparatus which, in its
operation, supplies fresh filling to the loom and then restarts the same, leaving
all the working parts of the loom in the same relative positions as they are
in the regular running.
In this manner the loom is run under the same conditions as it would be with
the weaver,without a magazine and without shock.
There is ample time for removing and replacing the shuttle which is easily
done in from five to seven seconds.
In the drawings, Figure 1 is a side elevation of a loom.
Figure 2 is a front elevation of the loom.
Figure 3 is a plan of the loom.
The driving or crank shaft A has attached to it the tight and loose
pulleys A¹ and A2 for driving the loom as are ordinarily used. The shipper
handle B is of the usual construction and is held in place by the notch B
when the loom is running. Upon the failure of the filling to raise the filling
fork C, the hammer C comes in contact with the fork C and pushes the block C
against the shipper handle B, forcing the same out of the notch B', releasing
the same to the action of the spring of the lever and forcing it into the position
shown in Figure 3, throwing the shipper yoke B2 over the loose pulley A².

page_text: At the same time the block C, in throwing out the shipper handle B, pulls
the rod D to the front. This rod D) is attached to a catch or pawl D¹ which
holds the supplementary belt-shipper rod D2 in position and which allows the
supplementary belt to run on the loose pulley 13, but as soon as the loom is
stopped the action of the block C, pulling the rod D and releasing the pawl. D',
causes the shipper rod D2 to slide, by the action of the spring D, to the position
shown, over the tight pulley 15 and start the supplementary shaft, D. On
the opposite end of the shaft. De is a pinion D7 which gears into the wheel D8
secured to the shaft D which shaft D passes across the loom and has attached
to the outer end whatever mechanism desired to release and supply a fresh
bobbin or shuttle.
After this has been accomplished the toe or cam E, attached to the wheel D8,
in revolving acts on the roller E' secured in the end of the compound lever E
which moves the shipper handle B into position in the notch B' and at the
same time forces the belt-shipper yoke B2 over the tight pulley A¹ and starts
the loom. At the same time the horn or projection g on the belt-shipper
roke B2 comes in contact with the projection g on the rod D2 and forces the
yoke attached thereto over the loose pulley D³, thereby locking the rod D² by
the catch D, stopping the supplementary driving device and starting up the
loom.
The supplementary driving-pulley is driven by a belt from the small pulley H
attached to the loose pulley A2. Thus it will be seen that the supplementary
loose driving-pulley only runs in case the loose pulley A2 should turn while
the belt is on the tight pulley A¹
.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
1 claim is
CLAIM.
In a loom, driving mechanism for driving the operative parts of the loom,
means operative upon an absence of weft thread to bring the operative parts
of the loom to rest, instrumentalities arranged to act while the operative parts
of the loom are at rest to supply fresh weft thread and then restart the loom
and stop the supplementary driving mechanism, all substantially as described.
Dated this 20th day of May AD 1899
EZEKIEL GODDARD CRANESHAW.
In presence of:–
-
RICHARD P. COUGHLIN,
JAMES E. WALSIT,
Haseltine, Lake & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.