IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1881

page_text: LETTERS PATENT to George Kirk, of the Firm of Schofield and Kirk, of
Huddersfield, in the County of York, Machine Makers, for an Invention
of "IMPROVEMENTS IN LOOMS FOR WEAVING."
PROVISIONAL SPECIFICATION left by the said George Kirk at the Office
of the Commissioners of Patents on the 6th October 1881.
GEORGE KIRK, of the Firm of Schofield and Kirk, of Huddersfield, in the
County of York, Machine Makers. "IMPROVEMENTS IN LOOMS FOR WEAVING."
This Invention relates to apparatus for raising and lowering the shuttle boxes.
According to my Invention the boxes are connected by a vertical rod to the
shuttle box lever, and operated upon by a cam on the crank shaft which lifts the
boxes at each revolution thereof. For supporting the shuttle boxes during their
descent I employ a short lever mounted upon the same fulcrum as the shuttle box
lever. The end of this short lever rests upon an incline formed on or attached
to a sliding box. The sliding bar is caused to reciprocate at each revolution of the
crank shaft by means of the usual sliding tappits on the crank shaft and a bell
crank lever and a spiral spring which acts in opposition to the tappits. When the
boxes are raised the end of the short lever rests upon the incline, but when the
boxes are to be lowered the sliding bar and incline are drawn from under the lever,
and the end thereof travels gradually down the incline, so letting the boxes down
with concussion. The boxes are received and held in the required position by one
or other of a series of notches formed on the end of another sliding bar, caused to
slide in one direction by the tappits previously mentioned, and in the opposito
direction by a spiral spring. Instead of sliding the tappits on their shaft by means
of the vertical lever usually employed, they are slided by means of a horizontal
bar operated by a vertical lever from the jacquard.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Kirk in the Great Seal Patent Office on the 6th April
1882.
GEORGE KIRK, of the Firm of Schofield and Kirk, of Huddersfield, in the
County of York, Machine Makers. "IMPROVEMENTS IN LOOMS FOR WEAVING."
This Invention relates to apparatus for raising and lowering the shuttle boxes.
According to my Invention the boxes are connected by a vertical rod to the
shuttle box lever, and operated upon by a cam on the crank shaft which lifts the
boxes at each revolution thereof. For supporting the shuttle boxes during their
descent I employ a short lever mounted upon the same fulcrum as the shuttle box
lever. The end of this short lever rests upon an incline formed on or attached to a
sliding bar. The sliding bar is caused to reciprocate at each revolution of the
crank shaft by means of a cam fixed on the crank shaft acting on a bell crank
lever and a spiral spring which acts in opposition to the cam and tappits. When
the boxes are raised the end of the short lever rests upon the incline, but when the
boxes are to be lowered the sliding bar and incline are drawn from under the lever
and the end thereof travels gradually down the incline, so letting the boxes down
without concussion. The boxes are received and held in the required position by
one or other of a series of notches formed on the end of another sliding bar, caused
to slide in one direction by the tappits previously mentioned and in the opposite
direction by a spiral spring.
In order that my Invention may be more fully understood I herein give reference
to the accompanying Sheet of Drawings, which represents such parts of a loom as
are necessary for the full explanation of my Invention.
Fig. 1 represents end elevation of a loom, and Figs. 2, 3, and 4 are details or
detached views of the principal parts; A are the shuttle boxes which are con-
nected by a rod B with the shuttle box lever C, to the other end of which lever is
attached a rod D which connects the box lever with the tappit lever E. The
boxes are raised by means of the series of cams F, which are mounted and caused
to slide upon the crank shaft by means of the lever G, which is operated by the
jacquard indicating apparatus in the usual manner.
When the boxes are raised to the required extent the spiral spring a draws the
notched sliding bar H under the stud g in the box lever, and thus provides a firm
support for the boxes. An additional support is also afforded by another sliding
bar I upon which is formed an incline J, upon which incline rests the pin or stud K
attached to the lever L which is mounted upon the same fulcrum as the shuttle
box lever C. When the boxes have to be lowered one of the sliding tappits c, d,
is brought into position by the lever G which strikes the lever M, drawing back
the bar H one or two notches as the case may require, whilst the tappit e acting
on the bell crank lever N draws back the sliding bar I and incline J, the stud K
riding down upon the surface thereof, whereby the boxes are lowered gradually
and steadily instead of falling irregularly and with a shock.
In the detached views the various levers are indicated by their respective letters
of reference.
Having thus described my Invention, and the means which I adopt in carrying
the same into effect, I would have it understood that I do not confine myself to
the precise details shewn and described, as these may be varied without departing
from the peculiar character of my Invention; but what I claim is,—
Firstly. The employment of the sliding bar I with the incline J, by means of
which the boxes may be lowered gradually in manner substantially as heroin
shewn and described.

page_text: Secondly. The combination of the box lever C notched bar H and sliding bar I
with incline J, in manner and for the purpose substantially as herein shewn and
described.
In witness whereof, I, the said George Kirk, have hereunto set my hand and
seal, this Thirty first day of March, in the year of our Lord One thousand
eight hundred and eighty-two.
GEORGE KIRK. (L.S.)