IMPROVEMENTS IN STOP MOTION FOR Looms."
Year: 1872

page_text: LETTERS PATENT to Willard Comey and Sidney Stevens Turner, of
Westborough, County of Worcester, Massachusetts, in the United
States of America, for the Invention of "IMPROVEMENTS IN STOP
MOTION FOR Looms."

page_text: unto us, our executors, administrators, and assigns, Her Royal Letters
Patent for the same, and have made solemn Declaration that we are
the true and first Inventors thereof.
NOW KNOW YE, that we, the said Willard Comey and Sidney Stevens
Turner, do hereby declare that the following Complete Specification,
under our hands and seals, fully describes and ascertains the nature of
the said Invention, and in what manner the same is to be performed,
in and by the following statement, reference being had to the accom-
panying Drawings, making a part of this Specification :—
The nature of our Invention consists in a device for preventing the
threads which have already been beaten up on a loom in which a number
of shuttles are used from falling back on to the lay, and thus becoming
entangled with the weft detector device, and preventing its action when
the weft thread next to be beaten up breaks. These threads, which it
is necessary to prevent from falling onto the lay, are those that extend
from the outer edge of the web to the shuttle that remains in the box.
These threads are only liable to fall on the lay when the same is beating
up, and can only fall on to that portion of the lay that extends beyond
the web, and it is upon this portion of the lay that the detectors are
located.
The device by which this is effected consists of reciprocating rods or
bars attached to the lay outside of the space occupied by the web, and
is actuated by suitable machinery so as to project beyond the face of
the lay while it is beating up, and thus to prevent the threads that have
already been beaten up (and extending from the edge of the web to the
resting shuttles) from falling upon the detector device, and prevent the
action of the stopping device when the weft thread next to be beaten
up) breaks.
The detector that we use. consists of an oscillating comb in com-
bination with a fixed comb, the oscillating comb having combined
1.1
21
11
1.2

page_text: GENERAL DESCRIPTION.
Let A, B, represent the frame of a loom to which the other parts are
attached; D is a lay actuated by the shaft C and link D. H² is a rod
or shaft connected to the lay back of the reed, and is provided with a
series of teeth h, h', h', h', see Figures and 4. These teeth h, h¹, h, h¹,
form the reciprocating comb detector, and are arranged to fall between
the corresponding teeth i, i, i, i, of the fixed comb in the shuttle race,
Figures 1, 2, and 3. By this arrangement of a series of teeth falling
between fixed teeth on the race way, we are sure that so long as the
thread lies on the teeth of the fixed comb the detector cannot pass down,
as the thread is held at so many points that it cannot slip.
In the arrangement heretofore in use the detector consisted of a
single rod dropping into a channel, and as an ordinary thread laying
loosely across this channel would not prevent the detector from dropping
into the channel the driver is doubtful in its action.
.
Our present Invention siezes the thread at a number of points at once,
so that its tensile strength is brought to bear to hold the detector, and
the action is certain, that is, the detector cannot fall low enough to
allow the rod / to come in contact with the shipping device and thus
stop the loom. The reciprocating comb detector h is operated by a
vertical rod H¹, Figures 1 and 3. This rod H¹ passes back and forth
with the lay, and is provided with a friction roll H, which in traversing
on the incline K, Figure 3, causes the rod H³ to rise and fall. This
action of the rod causes the detector to swing up and fall back as the
lay vibrates. N¹, Figures 1 and 2, is a rod extending forward as shown,
so that at cach motion of the lay it enters the channel in the race way
into which the rod ½ of the detector falls when not held back by the
weft thread. In case the rod h does fall into this channel (which occurs
when the weft thread breaks), then it comes in contact with the rod N¹
and pushes it out; this action communicates motion to the lever M' and
thus pushes off the shipping lever M and stops the loom. E' and E' arc
two. vertical rods attached to a lever E² which is connected to the picker
shaft E, as shown in Figures 1 and 3, and receives a vertical recipro-
cating motion from the said picker shaft. These rods E' and E¹ stand
above the raceway, as shown in Figure 3, while the lay is advancing, but
are withdrawn to the position represented in Figure 1 while the lay
retreats; thus the weft threads that have been beaten up cannot fall

page_text: upon the fixed comb i, i, i, of the lay as they would otherwise be liable
to while the lay is bringing up the new weft thread. These rods being
withdrawn just before the commencing of the back stroke of the lay
do not interfere with the weft thread that has just passed up.
We claim as our Invention,—
5
First. In combination with the lay of a loom the vertically recipro-
cating rods E', E³, so arranged and operating that as the lay beats up
they project above the lay and thus prevent the threads that have
alrcady been beaten up from falling back on to the lay, and thus inter-
fering with the action of the weft detector, substantially as described 1
and for the purpose set forth.
Second. The combination of the bar with the movable comb
h, h, h, h, the shifting pin N', and lever M operating substantially as
described and for the purpose set forth.
In witness whereof, wc, Willard Comey and Sidney Stevens Turner, 1
have hereunto set our hands and seals, this Twenty-fifth day of
May, in the year of our Lord One thousand eight hundred and
seventy-two.