IMPROVEMENTS IN JACQUARD MACHINES
Year: 1883

page_text: LETTERS PATENT to Isaac Thomis of Eccleshill in the county of York,
Designer, and Mahlon Priestley, of Wibsey in the same county Jacquard
Machine Maker for an Invention of IMPROVEMENTS IN JACQUARD MACHINES
PROVISIONAL SPECIFICATION left by the said Isaac Thomis and Mahlon
Priestley at the Office of the Commissioners of Patents on the 10th February
1883.
ISAAC THOMIS of Eccleshill in the County of York, Designer and MAHLON
PRIESTLEY of Wibsey in the same County, Jacquard Machine Maker IMPROVEMENTS
IN JACQUARD MACHINES
The object of this invention is to regulate the harness of a Jacquard machine in
such a manner that less power is required to work the machine, the wear and tear
of the harness threads reduced, the loom shuttle to make two or more picks without
the warp changing until required to do so to alter the pattern of the fabric, and the
loom run at a quicker rate of speed than can be accomplished with Jacquard
machines as ordinarily constructed
We accomplish our object by mounting in the frame of the Jacquard machine
double or single upright bars, baving the ordinary hook formed at the top of each
upright for being raised by what are commonly known as knives or grates which
are actuated in the ordinary manner.
Each of these upright bars is formed with a bend in such a position that the
bend coming in contact with the needle eye or a cross bar causes the hooked end to
be moved such a distance that the ascending knife or grate can freely pass.
When any of the uprights harness and warp connected thereto have been raised,
in order to retain the same in the position, we form a hooked projection on the
upright, which, after the upright has been raised and is beginning to descend
catches hold of a stationary cross bar by which means the upright, jacquard harness
and warp are retained until released by the action of the needle in connection with
the upright.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Isaac Thomis and Mahlon Priestley in the Great Seal Patent Office
on the 10th August 1883.
ISAAC THOMIS of Eccleshill in the County of York, Designer, and MAHLON
PRIESTLEY of Wibsey in the same County, Jacquard Machine Maker IMPROVEMENTS
IN JACQUARD MACHINES
The object of this invention is to regulate the harness of a Jacquard machine, or
the healds used for weaving, in such, a manner, that the power required to work
the machine, and the wear and tear of the harness is reduced, the loom shuttle may
make two or more picks without the warp changing until required, in order to alter 1
the pattern of the fabric, and the loom to run at a quicker rate of speed than can
be accomplished with Jacquard machines as ordinarily constructed.
Our invention consists in mounting in the jacquard frame, double or aingle
upright bars, which are raised by reciprocating knives or grates actuated in the
-ordinary manner. Each upright is formed with one or two bends, which on passing
through the needle eye or against a cross bar as the case may be, causes the hooked
end or ends-to-be moved clear of the ascending knife or grate: and in order to
retain the warp threads that have been raised in the position until required to
change, we form a.hook on each upright, which we term the bottom hook, which,
after the upright has been raised, and is beginning to descend, is hooked on
to a stationary cross bar and held thereby until released by the action of the card
cylinder and needle.
In order that our invention may be more fully understood,-we have appended
drawings illustrative thereof, and have marked the same with letters of reference.
Figure 1 represents such portions of the end elevation of a Jacquard machine as
are required to describe the action of our improved upright bars. The reciprocating
knives or grates A and A' are of the ordinary construction mounted and actuated
in the usual manner, as are also the needles B, and the card cylinder C. The
uprights D mounted in the machine are of the same construction as shewn by
Figure 2, having a hook at the top of each upright for being raised by the
reciprocating knives or grates A and A¹, and on one of the uprights is formed a
hook E which we call the bottom hook, and is for the purpose of holding up the
healds or harness when they are required to remain up for more than one pick of
the shuttle.
The harness threads or the healds as the case may be, are connected to the
bottom of the uprights by cords, which pass through the perforated board fixed
near the bottom of the Jacquard machine in the same manner as with ordinary
uprights.
The improved uprights are formed with bends F. F. in the requisite position,
that when any upright has been raised and is descending, the bent portion F on
passing through the needle eye, causes the loose end of the upright to spring a
sufficient distance that the ascending knife or grate can freely pass, and thus
allow the upright to continue its downward course.
When the uprights are raised by either of the reciprocating grates A and A¹,
and at the full extent of the upward portion of the traverse, the bottom hooks E
are slightly above the cross bars in the stationary grate G, and on beginning to
descend, the hooks E will rest upon the said cross bars Q¹ and thus retain the
uprights and warp threads connected therewith elevated: unless the needles in
connection with the raised uprights are actuated by being pressed in the direction
of the arrow by the card cylinder, thereby moving the hooks E clear of the cross

page_text: bars G¹, thus allowing the uprights and warp threads to descend. Should any of
the uprights remain up for more than one pick of the shuttle, the same will be
raised until the hooks E are clear of the cross bars G¹, but on the reciprocating
grate descending, the uprights will again rest upon the cross bars G¹ until actuated
upon by the needles in the manner before described.
Figures 3 & 4 shew two different kinds of uprights used when the reciprocating
grates A and A¹ are placed one above the other and do not pass each other when
in motion, the latter illustrates single uprights which may be used and dislodged
from the reciprocating grates by stationary bars H passing across the machine.
We can accomplish our object by using the modified bars shewn by Figure 5,
which have no swells F formed thereon, but in order to obtain the necessary time
for the top of the uprights to be clear of the reciprocating grates whilst they pass
each other, we dispense with the ordinary eccentric or crank, and mount in lieu
thereof a cam on one of the loom shafts somewhat similar to the one shewn by
Figure 6, and connect the cam to the Jacquard cylinder by such rods as are required
to suit the loom.
By using a cam constructed somewhat in the form as shewn, we obtain a
considerable "dwell" whilst the flat portions of the cam at K are passing over the
pin in the cam groove, that is attached to the connecting rods, coupled to the card
cylinder.
Having thus described the nature of the invention, and in what manner the same
is or may be performed, we wish it to be understood that we do not confine ourselves
to the exact forms of the uprights shewn and described, nor to the deliniation of
the cam groove, as both the uprights and the cam can be considerably varied
without departing from the peculiar character of the invention, but what we do
claim is:
The use of Jacquard uprights used for regulating the warp in looms for
weaving, constructed with a projection E in some part of each upright for the
purpose as hereinbefore described.
Upright bars constructed with bends F in the manner and for the purpose as
hereinbefore described and as illustrated by the accompanying drawings.
The use of the adjustable stationary grate G for the purpose as hereinbefore
described
In Witness whereof we the said Isaac Thomis and Mahlon Priestley have
hereunto set our hands and seals this seventh day of August in the year of our
Lord One thousand eight hundred and eighty-three.
JOHN WAUGH C.E.
Sunbridge Chambers
Bradford Yorks,
ISAAC THOMIS
(L.S.)
MAHLON PRIESTLEY (L.S.)