CERTAIN IMPROVEMENTS IN THE METHOD OF STOPPING POWER LOOMS TO PREVENT INJURY TO THE FABRIC
Year: 1849

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
JOWETT, of Burrage House, in the West Riding of the County of York, send
greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by
Her Royal Letters Patent under the Great Seal of Great Britain and
Ireland, bearing date at Westminster, the Fifth day of June, in the
twelfth year of Her reign, did give and grant unto me, the said Thomas
Jowett, my exors, adiñiors, and assigns, Her especial licence, full power, sole
privilege and authority, that I, the said Thomas Jowett, my exors, adiñiors,
and assigns, and such others as I, the said Thomas Jowett, my exors, admors,
and assigns, should at any time agree with, and no others, at all times during
the term of years therein expressed, should and lawfully might make, use,
exercise, and vend, within England, Wales, and the Town of Berwick-upon-
Tweed, my Invention of "CERTAIN IMPROVEMENTS IN THE METHOD OF STOPPING
POWER LOOMS TO PREVENT INJURY TO THE FABRIC;" in which said Letters Patent
is contained a proviso obliging me, the said Thomas Jowett, particularly to
ascertain and describe the nature of my Invention, and in what manner the
same is to be performed, by an instrument in writing under my hand and seal,
and cause the same to be inrolled in Her said Majesty's High Court of
Chancery within six calendar months from the date thereof.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Thomas Jowett, do hereby declare that the nature of my said Invention, and

page_text: in what manner it is to be performed, are herein fully described and ascer-
tained, reference being had to the Drawings hereunto annexed, and to figures
and letters marked thereon, that is to say:-
My Invention relates to the arresting and suspending of the movements of
looms employed in weaving textile fabrics, and preventing injury being done to
the. fabric manufactured whenever the shuttle carrying the weft thread fails to
complete its traverse across the warp and through the shed, but remains in the
shed..
And my Invention consists in the construction, arrangement, and appli-
cation to power looms of apparatus by which the swells in the shuttle boxes
are caused to effect with greater certainty the stoppage of the movements of
the loom upon the absence of the shuttle from the shuttle box at the proper
time, that is when the slay is proceding to beat up. It is desirable that the
apparatus employed for this purpose should be as effective and certain as
possible in its action, and this end is certainly very imperfectly accomplished
by the ordinary apparatus omployed for the purpose, namely, the common stop
rod and finger, which stop the movements of the loom by the depression of the
finger whenever the shuttle is absent from the shuttle box, when, as the slay
proceeds to beat up the fabric, strikes against the frog upon the side framing,
and thereby serves to stop the movements of the loom. This apparatus is also
uncertain in its operation, and it is for the removal of this uncertainty of
action and for more effectually stopping all further movements of the loom
that my Invention is intended.
In the accompanying Sheet of Drawings, Figures 1 and 2 represent two
views of a portion of a power loom to which my improvements are applied;
the parts of the loom arc of the ordinary construction, with the exception of
the parts attached as the disengaging apparatus, and which constitutes my
Invention. The shuttle box a is provided with the ordinary swell b and stop
rod c in the usual manner, but instead of the ordinary finger upon the stop
rod c is fixed the lever d, the end of which is received in a slot or mortice in
the bolt e, which moves in a vertical direction within the guide f attached to
the front of the slay. The bolt is thus caused to move vertically in the guide,
being up or down, according as the shuttle is present or absent from the
shuttle box. Thus it is depressed when the shuttle is absent and the swell
projects into the shuttle box, and is elevated when the shuttle is present.
Should the shuttle complete its traverse across the shed and arrive in the
opposite shuttle box the bolt will be elevated, and as the slay proceeds to beat
up will
pass over the sliding frog without touching it, and allow the movements
of the loom to proceed; but should the shuttle fail to traverse the shed and be

page_text: absent from the shuttle box as the slay proceeds to beat up, the bolt will be
depressed, and will not now pass over the frog, but will strike against it, and
carrying it along with it will immediately, by means of the projecting pin h
attached to it, release the spring lever i by throwing it out of its notch, by
which, through the ordinary strap guide, the traverse of the driving strap from
the fast to the loose pulley is immediately effected, and the movements of the
loom suspended.
Having now described the nature of my said Invention, and the mode of
carrying the same into effect, I wish it to be understood that what I claim as
my Invention is the construction and arrangement of apparatus applicable to
power looms, being the sliding bolt or bar actuated by the ordinary swell in
the shuttle box for the purpose of stopping the movements of the loom when-
ever the shuttle fails to complete its traverse, or is otherwise absent from the
shuttle box, and thus prevent injury to the fabric.
In witness whereof, I, the said Thomas Jowett, have hereunto set my
hand and seal, this Third day of December, One thousand eight
hundred and forty-nine.
prosence of
SAM. WEATHERHEAD,
Sol', Bingley.
AND BE IT REMEMBERED, that on the Third day of December, in the
year of our Lord 1849, the aforesaid Thomas Jowett came before our
said Lady the Queen in Her Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stamped according to
the tenor of the Statute made for that purpose.