Year: 1888

page_text: Date of Application, 11th Feb., 1888
Specification Accepted, 16th Mar., 1888
I, EDWARD HOLLINGWORTH, of Dobcross, in the County of York, power Loom
Maker, do hereby declare the nature of this invention, (being an invention_com-
municated to me from abroad by George Frank Hutchins, of the Knowles Loom
Works, Worcester, in the State of Massachusetts, United States of America) and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
"
This invention consists in new and useful improvements connected with the Jacquard
mechanism of looms, the object being to render the parts automatic in their action,
and to give greater facility to the weaver when it is necessary to reverse or "lag back
the Jacquard cylinder mechanism for the purpose of finding a broken or loose end of
weft, the several improvements herein enumerated being specially applicable to that
class of loom commonly called the Hollingworth & Knowles' loom.
According to the present construction of this class of loom, the Jacquard mechanism
is operated by a vertical shaft driven by spur and bevol gearing from the crank shaft
of the loom, a clutch in such said upright shaft being employed for the purpose of
breaking the connection, which is now done by the weaver operating a lever previous
to lagging back.
This invention consists in dispensing with the clutch and the lever for operating
same; the improved parts being of such a character as to make it unnecessary for
the weaver to operate any part of the mechanisin previous to lagging back.
In carrying out this invention I mount loosely upon the said upright shaft a bevel
wheel made with a deep boss having a cup on the top thereof, and within the said cup
is a collar or boss fixed upon the said upright shaft. A vertical hole is made in the
said fixed boss in which is placed a weighted pin, the bottom thereof entering a
concentric cam groove formed in the bottom of the cup on the top of the driven bevel
wheel, so that on the rotation of the driven bevel wheel the bottom of the vertical pin
enters the cam groovo, and on its arrival at the end of the said groove the pin and
vertical shaft (which meanwhile remains stationary) are now caused to revolve, and
consequently the Jacquard mechanism at the top thereof is set in motion, and in order

page_text: to prevent the Jacquard mechanism running quicker or ahead of the other parts, as
might possibly occur, through the momentum it has received, tho cup carries a
weighted finger, which as the cup rotates, such weight is thrown outwards by centri-
fugal force, causing the opposite end of the said finger to enter or drop into a notch
or recess in the boss fixed upon the upright shaft, consequently the driven bevel wheel
and the vertical shaft rotate together, rendering it impossible for the parts to revolve
at different speeds.
Such being the nature and object of said invention, I will now proceed to describe
the same more fully, and for that purpose make reference to the accompanying sheets
of Drawings, wherein Fig. 1 is end view of so much of a loom as is necessary to
illustrate the invention; Fig. 2 is section of the improved parts, and Fig. 3 plan
view thereof. A is the lower chilled gear segment wheel and B the upper
chilled gear
segment wheel in connection with the Jacquard mechanism, caused to revolve by two
sets or pairs of bevel wheels C and D fixed upon the upper end of the vertical shaft E,
which upright shaft receives its motion from another pair of bevel wheels F and F¹,
driven by spur wheels G and H from the crank shaft I, all arranged and operated in
the ordinary manner according to the Hollingworth and Knowles' loom. The bevel
wheel F working loosely on the upright shaft E carries a boss J and cup K, in the
bottom of which cup K is cut or formed the cam groove a (see Figs. 2 and 3). The
entrance to this cam groove commences at point b which is level or flush with the
bottom of the cup. The cam groove is concentric with the shaft E, and it gradually
gets deeper, until it terminates at point c, where it may be about half an inch deep,
or other convenient or suitable depth. Upon shaft E is fastened by key d or other
suitable device the boss L, of a diameter equal to the inside diameter of the cup K,
and in this boss is a vertical hole for the reception of the pin M, which is sufficiently
long to pass through the boss L and rest in the bottom of cam groove a formed in
bottom of cup K, the said pin being also weighted to ensure its descent. Therefore,
when the loom is set in motion, the toothed boss F and cup K are caused to revolve,
and if the pin M is resting on any part of the bottom of the cup, the vertical shaft
would remain stationary until the end of the cam groove c had been brought into
contact with the vertical pin M, whereupon the pin would be carried around with the
bevel wheel F, in doing which the fixed boss L would be driven thereby, consequently
the shaft E would also be driven and the Jacquard mechanisin set in motion. To
ensure that the Jacquard revolves no faster than the loom, the finger N is employed,
carrying a weight P, and by the centrifugal force of the cup the said weight is thrown
out as shewn in dotted lines, causing the opposite finger N to enter or drop into a
notch formed in the rotating boss L, so that the cup and boss revolve together. Care
inust, however, be taken to cut the notch in such a part of the boss L that the weight
can only get into the notch when the pin M is engaged with the end c of the cam
groove a, therefore when the loom is set in motion the parts just described are always
in position for acting, but when the weaver wishes to find a broken or a lost end of
weft thread, and it is necessary for him or her to "lag back" or reverse the position
of the Jacquard cylinder the loom is stopped in the ordinary manner, whereupon the
weight Plowers again as shewn in full line, lifting the finger N out of the notch in
the boss L, whereby the bevel wheel F is automatically disconnected with the upright
shaft E, making it unnecessary for the weaver to disconnect the parts as was hitherto
the case, consequently the weaver is at liberty to at once turn over the Jacquard and
cylinder by hand in the process of "lagging back" without disturbing the position
of the crank I.
By the employment of the driven cup, the fixed boss and pin M, and the weighted
lever P, whenever the loom is set in motion tho Jacquard and parts are automatically
connected as the crank or loom proceeds, but when the loom stops, the shaft E and
Jacquard are automatically disconnected with the driving parts, permitting the weaver
to attend to the "lagging back" without the necessity of walking from one end of the
looni to the other to disconnect the parts, as is now the case, consequently a saving
of time is effected, especially when the apparatus is applied to very broad looms.
Although I have described this invention and shewn the formation of a cup
carried

page_text: by the bevel wheel and the use of a boss entering such cup, I would here remark that
the parts may be made vice versa, the cup fixed to the shaft and the boss formed on
the upper part of the bevel wheel.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what I
claim is:-
Firstly. In a loom, for operating the Jacquard mechanism, the combination of the
driven cup K, fixed boss L, and pin M employed in the manner and for purposes
substantially as herein shewn and described."
Secondly. In a loom, for operating the Jacquard mechanism, the combination of
the driven cup K, fixed boss L, and pin M, one end of which pin works in a concentric
cam groove a operated and employed in manner and for purposes substantially as
herein shewn and described.
Thirdly. In a loom, for operating the Jacquard mechanism, the employment of the
weighted finger N, which by centrifugal force is made to drop into a notch formed in
the rotary boss L, all operated and employed for purposes substantially as herein shewn
and described.
Dated this 10th day of Februar 1888
TASKER & CROSSLEY,
Halifax, Agents.