IMPROVEMENTS IN LOOMS FOR WEAVING PILED FABRICS
Year: 1884

page_text: Wo JOHN BRINTON AND COMPANY, Limited, of Kidderminster, in the County
of Worcester, Carpet Manufacturers, and THOMAS GREENWOOD of Chester Road,
Kidderminster aforesaid, Engineer do hereby declare the nature of our invention
for "IMPROVEMENTS IN LOOMS FOR WEAVING PILED FABRICS" to be as follows:-.
This invention has reference to looms for weaving carpets and other piled fabrics
and consists in connecting and disconnecting the wire motion by means of a
coupling or clutch upon the crank shaft so that the wire motion can be started and
stopped at any given time required while the loom is at work. By means of the
invention the loom can continue working while the wire motion is at rest and
the loom can be at once changed when desired from one fabric to another-for
example, from a three-shoot to a two-shoot fabric.
In carrying out the invention we employ a coupling or clutch on the crank shaft
and we actuate this coupling by means of a lever which is operated by a cam on
the cam shaft so that the coupling is put into and out of connection with a pinion
from which the wire motion is actuated; at every revolution of the cam shaft the
coupling is disconnected from the pinion by the action of the cam for a part of
the revolution while during the remainder of the revolution a spring which acts on
the lever keeps the coupling connected with the pinion. The pinion is loose on the
crank shaft and therefore revolves therewith only when connected by the coupling.
If it be intended to make a three-shoot Wilton carpet, for example, the cam shaft
is driven so as to make one revolution for every three revolutions of the crank
shaft and the wire motion is thus disconnected during every third revolution of
the last named shaft. Then if it be required to change the loom so as to make a
two-shoot carpet it is only necessary to shift the cam on the cam shaft so that it
will not act on the lever; the coupling therefore remains in connection with the
pinion during every revolution of the crank shaft.
In the same way if it be intended to make a four-shoot carpet the cam shaft is
geared so as to be driven at one fourth the speed of the crank shaft and the
coupling is thus disconnected from the pinion by the action of the cam at every
fourth revolution of this shaft; while as before the loom can be changed to make a
two-shoot carpet by simply shifting the cam so that it will not act on the lever.

page_text: .
COMPLETE SPECIFICATION.
We JOHN BRINTON AND COMPANY, Limited of Kidderminster, in the County
of Worcester, Carpet Manufacturers, and THOMAS GREENWOOD, of Chester Road,
Kidderminster aforesaid, Engineer do hereby declare the nature of our invention
for "IMPROVEMENTS IN LOOMS FOR WEAVING PILED FABRICS" 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 looms for weaving carpets and other piled fabrics
and consists in connecting and disconnecting the wire motion by means of a
coupling or clutch upon the crank shaft so that the wire motion can be started and
stopped at any given time required while the. loom is at work. By means of the
invention the loom can continue working while the wire motion is at rest and the
loom can be at once changed when desired from one fabric to another,—for
example, from a three-shoot to a two-shoot fabric.
In carrying out the invention we employ a coupling or clutch on the crank shaft
and we actuate this coupling by means of a lever which is operated by a cam on
the cam shaft so that the coupling is put into and out of connection with a pinion
from which the wire motion is actuated; at every revolution of the cam shaft the
coupling is disconnected from the pinion by the action of the cam for a part of
the revolution while during the remainder of the revolution a spring which acts on
the lever keeps the coupling connected with the pinion. The pinion is loose on the
crank shaft and therefore revolves therewith only when connected by the coupling.
If it bo intended to make a three-shoot Wilton carpet for example, the cam-shaft
ja driven so as to make one revolution for every three revolutions of the crank-
shaft and the wire motion is thus disconnected during a portion of every third
revolution of the last named shaft. Then, if it be required to change the loom so as
to make a two-shoot carpet, it is only necessary to shift the cam on the cam-shaft
so that it will not act on the lever; the coupling therefore remains in connection
with the pinion during every revolution of the crank-shaft.
In the same way, if it be intended to make a four shoot carpet, the cam shaft is
geared so as to be driven at one fourth the speed of the crank-shaft and the
coupling is thus disconnected from the pinion by the action of the cam during a
portion of every fourth revolution of this shaft; while as before the loom can be
changed to make a two-shoot carpet by simply shifting the cam so that it will not
nct on the lever.
The annexed drawings represent so much of a loom as is necessary to illustrate
the invention. Figure 1 shows the coupling or clutch in connection or gear with
the pinion from which the wire motion is actuated; Figure 2 shows it dis-
connected. a is the crank shaft of the loom; b is the coupling or clutch thereon;
c is the pinion from which the wire motion is actuated through the intermediation
of the wheel d. e is the cam shaft and f the cam thereon. g is the lever that
actuates the coupling b; this lever has its fulcrum at h, its one end takes into a
grbove in the coupling b while its other end has connected to it a spring i which
acts on the lever so that it normally keeps the coupling 6 in gear with the pinion c.
k is a roller on the lever to serve as the surface that bears against the cam f.

page_text: The action is as follows:—At every revolution of the cam shaft s the coupling b
is disconnected from the pinion c by the action of the cam f upon the lever g for
a part of the revolution while during the remainder of the revolution the spring i
keeps the coupling connected with the pinion. In making a three-shoot Wilton
carpet the cam shaft e is driven at one third of the speed of the crank shaft a, and
the pinion cand therefore the wire motion are thus disconnected during a portion
of every third revolution of the crank shaft. Similarly in making a four-shoot
carpet the cam shaft e is driven at one fourth of the speed of the crank shaft, and
the pinion and therefore the wire motion are thus disconnected during a portion
of every fourth revolution of the crank shaft. In either case, that is to say,
whether the cam shaft is geared to rotate at either one-third or one-fourth the
speed of the crank shaft the loom can be changed so as to make a two-shoot carpet
by simply shifting the cam fon its shaft so that it will not act on the lever g; the
coupling b is therefore kept by the action of the spring i, in connection with the
pinion c during the whole of every revolution of the crank shaft.
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, in respect of looms for weaving piled fabrics, is
The means or arrangement substantially as hereinbefore described whereby the
wire motion is connected with and disconnected from the crank shaft and whereby
the loom can at onco be changed, if desired, from one fabric to another as, for
example, from a three-shoot carpet to a two-shoot carpet.