CERTAIN IMPROVEMENTS APPLIED TO JACQUARD Looms
Year: 1866

page_text: LETTERS PATENT to William Edward Gedge, of the Firm of John Gedge
and Son, of Number 11, Wellington Street, Strand, in the County of
Middlesex, Patent Agent, for the Invention of "CERTAIN IMPROVEMENTS
APPLIED TO JACQUARD Looms."-A communication from abroad by Charles
Devillaine. of Lyons, France, Merchant.
COMPLETE SPECIFICATION filed by the said William Edward Gedge
at the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 18th October 1866, pursuant to the 9th Section of
the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
EDWARD GEDGE, of the Firm of John Gedge and Son, of Number 11,
Wellington Street, Strand, in the County of Middlesex, Patent Agent, send
greeting.
WHEREAS I am in possession of an Invention for "CERTAIN IMPROVEMENTS
APPLIED TO JACQUARD LOOMS," and have petitioned Her Majesty to grant unto
me, my-executors,-administrators, and assigns, Her Royal Letters Patent-for-

page_text: •
the same, and have made solemn Declaration that the same is a communica-
tion to me from abroad by Charles Devillaine, of Lyons, France, Merchant.
NOW KNOW YE, that I, the said William Edward Gedge, do hereby
declare that the following Complete Specification under my hand and seal
particularly describes and ascertains the nature of the said Invention, and
the manner in which the same is to be performed, reference being had to.
the accompanying Sheet of Drawing, and to the figures and letters of
reference placed thereon.
"
The function of the mechanism known as the jacquard in the weaving of
stuffs consists in choosing the warped threads of the fabric which are to be lifted
for the passage of the shoot. For this purpose the warp threads are attached
to the said mechanism, which carries a greater or lesser number of these
partial lifting parts. The upper extremity of each crotchet hook or lifting
wire is susceptible of a certain displacement in order to withdraw them from
the action of the grif leash box or lifting bar, which is the main uplifting
organ or instrument; this displacement and the return of the lifting wires to
their normal position is produced for each of them by a needle acting on a
certain point in the height of the lifting wire. The needle is governed by its
spring or elastic, which keeps the lifting wire which it works in gear with the
leash box. The card of the loom acts on the extremities of all the needles by
its corresponding perforation. If the needle meets the solid part of the card
it is pushed back, and bending its elastic it retires its corresponding lifting
wire further from the lifting blades of the leash box; on the contrary, if the
end of a needle meets a hole pierced in the card it receives no pressure, its
elastic keeping the corresponding lifting wire in gear. The leash box being
raised by the workman lifts all the lifting wires which are in gear with it, and
consequently the warp threads attached to them, and leaves stationary the
lifting wires displaced by the needles because the leash box has been unable
to meet them in its ascent. The pressure of the card on the needles is
effected by the aid of a piece which retires from the needles for a change of
card and approaches them to apply the new card on their ends and press
them. The action of the motor, whether animate or inanimate, is exercised
on the frame carrying the leash box, and gives it a vertical movement,
alternately ascending and descending the frame of the leash box transmits this
movement in a modified manner to the pressing piece to retire it from or
approach it to the needles. These two motions although different are in fact
one, that is to say, if the leash box rises the pressing piece retires, and if the
leash box lowers the pressing piece approaches and presses. The pressing
piece further acts on the needles, when the leash box seizes the lifting wires

page_text: to raise them, otherwise the displaced lifting wires would not now be out of
gear; consequently, when the leash box re-descends, the pressure is exercised
on the lifting wires still seized; the needle over and above the resistance
of its elastic further meets all the resistance necessary to bend the lifting
wire; these two resistances, which unite, are overcome by the pressure of. the
'card on the extremity of the needle, which quickly pierces it or necessitates
the use of a stronger and consequently more expensive card causes con-
siderable wear of the compressed (réfoulé) lifting wires and the part which
compresses or drives them back; and in looms without case or spring box,
where the lifting wire acts only by its own elasticity, the power which brings
it back into gear is soon weakened.
The first of the improvements, the subject of this Invention, has for object
to do away with the cause of expense and the other disadvantages resulting
from the above defective arrangement of jacquard looms.
It consists in sup-
pressing the resistance offered to the movement of the needles by the lifting
wires still retained at the leash box during the pressure, and that by accom-
panying the lifting wires in their recoil movement by a movement either of
the entire leash box or of its blades. Thanks to this displacement of the
leash box or of its blades, that is to say, if the resisting point of the hooking
or catching, the needles no longer have any tendency to pierce and destroy the
cards. The means of producing these displacements of the hooking point
may vary in their action and their detail; it is possible to effect them by
acting either on the frame of the leash box or on the leash box, or also only
on the blades of the leash box, but they must always tend to the same end,
-namely, to impart to the hooking point a movement in the direction in which
the lifting wires are pressed ("foulée ") accompanying this pressure in order-
to suppress resistance.
Figure A of the annexed Sheet of Drawing represents a vertical section of
the parts of a jacquard loom necessary to the demonstration of the system
above set forth, the displacement being obtained by the displacement of the
entire leash box. A, framing of the loom; B, frame of the leash box having
an alternate ascentional movement; C, pressing piece receiving its horizontal
movement from the frame B by the friction roller 6 acting on the piece c;
D, needle; E, hook or lifting wire; F, leash box or grif composed of hook-
ing or lifting blades f; the leash box is held in a horizontal direction by slots
or slides or between friction rollers; G, roller fixed to the leash box F to give
it motion; H, oscillating angle block fixed to the frame A to be met by the
roller G in the descent of the leash box. This angle block has its oscillating
point at hand-its-stop-ath, it-thus resists the roller G when the-leash box

page_text: descends and forces it to deviate, bending the spring I which brings the
leash box back into position when in continuing its descent the roller G has
passed the angle block; in rising again the friction. roller causes the angle
block to pivot backward on the point h, and the leash box is not displaced;
there may be several corresponding rollers and angle blocks; I, antagonistic
spring bringing the leash box back into position. This Figure, drawn for
the explanation of the system, represents a particular type of loom, but this
mode of working possesses the particularity that it may be added to every type
or description of jacquard loom. The displacement of the hooking point is
not necessarily effected accordingly as the lifting wires are compressed, it may
take place considerably before the compressing ("refoulement"). This dis-
placement may even be effected in the ascent after the lifting wires are taken,
provided that a pressing piece independent of the needles brings back the
lifting wires behind the leash box before the descent. This improvement
includes any displacement of the hooking point no matter at what moment it
is effected, and also the compression or driving back ("refoulement") partly
in rising, partly in lowering, which results from such arrangement.
In conclusion, I claim the exclusive use of the process above described of
doing away with the abnormal resistance offered to the cards of jacquard
.looms by the needles still held by the leash box by the aid of any movement
which displaces the hooking point, and possesses the particular character of
being applicable to all jacquard .looms, no matter what may be the form of
these looms.
The next improvement, forming part of this Invention, relates to a new
method of unleashing applied to the jacquard loom; and in order that this
improvement may be thoroughly understood and appreciated the description is
divided into four parts, each accompanied by a Drawing, and if there are
repetitions in the description it is in order to render more intelligable the
Drawings, which each represent a system of unleashing..
FIRST PART (see Part 1 of the Sheet of Drawing).
In all jacquard looms there has always existed a very great friction of the
needle against the crotchet or lifting wire, and of the lifting wire against the
leash box, a friction occasioned by the recoil of the needle on to the lifting wire
while this latter is still suspended to the leash box; this friction continuing
some time, and becoming always greater and greater as the lifting wire
descends does not cease until the moment that the heel of the lifting wire
coming on the collar board is arrested. in its descending mevement; then the
leash box continuing to descend permits the lifting wire to effect its recoil

page_text: movement by escaping from above its blades; these several frictions cause,
firstly, a very great wear and tear of the loom; secondly, rigidity and shocks
in its working; thirdly, a very great resistance opposed by the needle to the
card which it often pierces. These defeets disappear by the following un-
leashing, which by a movement of the leash box, independent of that of the
pressure of the lifting wires, permits, firstly, an ascending movement in
which it takes the lifting wires during the compression ("refoulement");
secondly, a descending movement, in which it. leaves the lifting wire free
during the compression; this unleashing is applicable to jacquard looms of
every description, the apparatus varying with the system of compression.
This new unleashing applies to the system of compression called the connecting
rod ("bielle") method. In the support A is made a slide or slot B of a
circular form in which the connecting rod ("bielle ") C can play now left. B',
now right A¹. When the loom is at rest (as in the Figure) and that the
pressure is effected the rod C bears on the left side B¹ of the slot B made in
A. If it is desired to set the loom at work the. support A alone moves, and
the connecting rod C, which is stationary, rubs on the part of the slot
B, maintaining the pressure or driving back of the lifting wires up to the
moment that it touches the right side A1; during this rotary movement the
leash box, lifted by a strap or belt rolling round the cylinder T, is raised along
the lifting wires and has seized those not driven back; if after having finished
this ascending movement a descent takes place the rod C quits the right side A¹
to pass to the left side B' of the slot B and permits the leash box to descend
beneath the beak or hooked end of the lifting wires, and then, effect its
pressure. When the support A moves alone, leaving the rod C.stationary
rubbing in its slot B, the rod C is upheld by means of a notched rod n up
to the moment that the end A¹ of the slot B comes against the point C¹ of
the connecting rod C; then the fixed piece m has pushed back the notched
rod n and permits the connecting rod to follow the movement of its support.).
SECOND PART (see Part No. 2 of the Drawing.)
First description of press rendered moveable by an eccentric.-Figure
No. 1 represents the loom at rest; the friction roller C¹ bears on part 5
(Figure 1) of the sliding piece G and maintains the pressure. If we begin
the ascending movement the piece E rises entirely; the friction roller C¹ rises
to the point 4 of the sliding piece G; the lifting wires, which are in gear,
have been seized and uplifted during this ascending movement; then the
pressure ceases, the rod A following the outline of the piece B pushes back
the piece E, which has become free, and, thus prepares the descent. The

page_text: apparatus is now in the position shewn, Figure 1*; the head of the rod A
being raised more or less high in the eccentric piece B, the workman ceases
to press on the treadle, the friction roller C¹ descends vertically on the hollow
part No. 6, the friction roller C comes on the bossed part No. 7, where it
operates the pressure while directed by the eccentric piece B'acting by the
arm A, it places itself more on the left beneath the hollow part No. 6; by
the same movement the roller C₁ has left the hollow part to pass on the
piece G; the bossed part No. 7 combined with the roller C therefore pro-
duces in descending a short pressure, which commences when the lifting wires
-no longer hold to the leash box, and the roller C¹ combined with the piece G
a lengthened pressure, which continues while the leash box seizes the lifting
-wires. The apparatus thus described operates in descending.
Second description of press movement horizontally and perpendicularly
to the batten, the pressed pieces being rendered moveable.-Figure No. 2
(Part 2). As in the preceding Figure the loom is at rest; the main rod E
carrying the two friction rollers C and C¹ may slide horizontally in the
sides X and X' of the frame of the leash box; the piece B is fixed to
an immoveable part, itself fixed to the upright of the loom. The part A
also holding to this immoveable part may slide in a horizontal" direction
perpendicularly to the main rod; it is surmounted by a cap projecting on the
side towards the main rod; this projection increasing progressively from the
top to the bottom is cut horizontally in this part, leaving a space between
the two pieces A and B; it has on the face towards the friction roller C a slot,
deep at the bottom, but dying away at the upper part; the rod D¹ is at the
entrance of this slot, and the roller C resting on the piece B keeps the
roller C pressing the card; the pièce A and the rod D¹ are held in their
'actual position each by a spring tending to bring them back if they are
driven away by any power; the workman presses down the treadle, the
friction roller C rises leaving 'beneath it the piece B and comes on the piece A
on which it passes maintaining the pressure; then ceding on the inclinėd
plane of this piece it allows the rod E to slide in the slots X and X', being
retired by the elastics G and G¹, and discontinues the pressure on A' when the
lifting wires have been seized and lifted by the leash box. During this
movement (see Figure No. 2*, shewing a detached part) the rod D¹ rises
in the slide A", and giving in its slot D rises over the top part A*, which
pushes it back to permit it afterwards to return to its stationary point brought
back by its spring; the workman ceases to bear on the treadle (see
Figure No. 2**); the rod D¹ comes at A' on the inclined plane of the cap A
and compasses or drives.it back in descending as well as the entire piece A,

page_text: which uncovers the piece B, on which comes the roller pressing progressively
until it arrives on the small surface B, which is it stationary point; the
pressure does not take place on the part B, excepting when the lifting wires
rest on the collar board. During this movement, the rod D' has kept the
piece A outside the piece B and does not allow it to come back on this piece
until the roller being at the end of its journey the rod D¹ finds itself beneath
the
-сар
A and no longer offers any resistance to it, then moved by its spring
it comes back to its stationary position, presenting its slot to the rod D¹ and
allowing it to recommence the movement.
Modification of second description of press. Fixed press. Pressed pieces
moveable. By this arrangement the press of ordinary looms requires no
modification or displacement, it is sufficient to replace the lower part of the
ordinary elbowed or angle piece by the part A and B of the apparatus of the
preceding description, leaving of the elbow piece only that part which serves
to turn the cylinder for each card.
Third description. Vertical movement of the press operating by loss of
time. Figure No. 3 (Part 2). Allow the rod E to oscillate around the axle F
which traverses it at the end furthest from the roller; make a vertical groove
in the casing of the leash box, leaving below the rod a vacant space of a
height equal to that of the pieces which serve to prolong the pressure in the
two first descriptions of press above described; place as a safety piece a
stop A, which can be driven back by the piece D fixed to the casing of the
leash box, and an elastic G holding the rod E at the upper part No. 1 of the
slide A', the loom is at rest; the roller C is at the bottom point No. 1* of
the elbow piece and presses the card. We now begin the upward movement.
The rod E turning on its axle and in conjunction with the roller C maintains
the pressure until the lower part No. 2 of the slide A¹ touches the rod E;
then the piece D having arrived at B pushes back the stop piece A, which
leaves the friction roller free; the roller then begins an ascending movement
and still maintains the pressure until it has arrived at points No. 2; this
prolonged pressure has permitted the leash box to seize the lifting wires which
are no longer pressed; the rod E then withdrawn by its elastic G retakes its
position at the upper part of the slide A, and the descent may take place with
a very short pressure from the point No. 2 to point No. 1, which pressure
acts when the lifting wires are free. This last description of press can only
operate in descending, whereas the three preceding methods, on the contrary,
bave for special characteristic the faculty of effecting the unleashing either in
rising or in descending, or partly in rising and partly in descending, requiring
for this
purpose only to diminish or to increase by modifying the time of the
-
111
FL

page_text: projection on which the roller presses in the descent while preserving the same
arrangements in the piece which is pressed in the rising of the roller and in
the other parts of the apparatus.
.
on.
Fourth description. General means of maintaining or causing the
pressure up to the seizure of the lifting wires (see Figure No. 4, Part 2).
The press is in all points in conformity with ordinary presses; the elbow or
angle piece. only is modified in that part which combined with the press
effects the compression or driving back of the needles. This modification
consists in making the bossed part shorter, and not to cause any pressure until
the lifting wires rest on the collar board. To maintain the pressure until the
seizure of the lifting wires (see Figure 4) there is the cross piece G of the
batten two rods A and A', vertical at their lower part and receding at the
top. On the casing of the leash box at each side is an arm, having one of
its ends held to the said casing by a small rod or vertical axle F which
permits the movement in a horizontal direction of the other end furnished
with long-headed hooks or catches C and C. Horizontal slots X and X'
keep the rods fixed on the casing, à spring K keeps them drawn on
one side of the slot in gear with the rods fixed to the batten ; the
loom is at rest, the cards are pressed, and the lifting wires have seized
the batten rod; the workman lowers the treadle, the casing of the leash
box rises with its supplemetary hooks which slide on the vertical part
of the rods maintaining the pressure until the leash box seizes the ordinary
hooks or lifting wires; then sliding on the receding part of the rods the
supplementary hooks ceasing the pressure permit the batten to recede and
the casing of the leash box ends its ascending movement; the workman
permits the treadle to rise, the frame or casing descends vertically, the batten
re-approaches and presses by its rods on the end. of the end of the head of the
supplementary hooks, which it pushes.back in conséquence of their shape, and
continues to approach by causing its rods to slide on the head of the hooks,
which seize them when the pressure takes place. This arrangement operates.
in all looms of no matter what form, either by preserving in rising the pressure
made in descending, as in the above Figure, or by causing the entire pressure:
in rising and preserving it until the lifting wires are seized, and that by
modifying the shape of the rods, which, instead of being vertical at their
starting point, have the shape of the elbow piece reversed. .
t
Figure No. 5 (Part 2) is necessary to the explanation of Description No. 4,
applied to the power loom with connecting rod. B, cylinder of loom; D, support
of connecting rod; F, connecting rod; C, point at which the connecting rod
is attached 'to 'the batten; X and X', slot made in the rod and permitting the

page_text: cylinder B to turn in displacing the point F without displacing. the point:C of
the connecting rod during the ascent of the leash box, and the maintaining of
the pressure by the supplementary hooks.
THIRD PART (see Part 3 of Sheet of Drawing).
In the first part I state that the unleashing is operated as stated in the
improvement first herein described. An unleashing which by a movement of
the leash box independent of that of the lifting wires permits, firstly, an
ascending movement, in which it takes the lifting wires during the compression
or driving back; secondly, a descending movement, in which it leaves the
lifting wire free before the compression. The first condition of this unleashing
is to effect the compression or driving back of the lifting wires when they are
independent of the leash box. The duration of this movement of inde-
pendance is comprised between the moment when the lifting'wire resting on
the collar, board ceases to descend while the leash box continues to lower and
when the leash box re-ascending again meets the lifting wires to carry them
away. The compression of the free lifting wires can only take place during
this moment of freedom, which comprises two parts of the movement of the
leash box; firstly, end of the ascending movement; secondly, beginning of
the ascending movement. Another absolute necessity of the working is that
if the compression can only begin when the lifting wires come back inde-
pendent in consequence of the descent of the leash box, this compression
must-continue when it rises until the perfect dependance of the lifting wires;
that is. to say, when they are seized and already uplifted. To fulfil these
conditions the only motor is the leash box rising and lowering, actuated by the
workman; the vertical movements of this leash box are transmitted. hori-
zontally to the press in actual use by two general means;. firstly, the elbow or
angle piece; secondly, the connecting rod. These general characteristics
apply as regards the movements of the press to every kind of jacquard .loom.
The elbow or angle piece by its shape and the connecting rod, by the relative
position of its point of attachment, produce a more or less rapid compression,
but commencing at a certain point in the descent of the leash box to cease at
the same point, when it rises again in consequence of the symmetry between
the go and the come: Now this problem is solved by the method of
unleashing, that is to say, the independence of the movements consists in
commencing the compression of the lifting wires at a. given point of, the
journey of the leash box to preserve it up to another given point of the
ascending movement of this leash box independent of the first, which causes
the production with the inverse symmetrical up-and-down movement of the

page_text: "
leash box a press movement, that it to say, a compression and abandonment
of the non-symmetrical lifting wires, which advance, retire, or stop during the
movements of the leash box which actuates them, but without connection
between the two movements. This independence or irrelevant movement of
the leash box and of the press which I have herein termed "unleashing"
(dégriffage") may be obtained by various means varying in appearance, but
resembling each other in character. Transform the alternate regular con-
tinuous and symmetrical movement of the leash box into a press movement
for compressing or forcing back the lifting wires alternate, irregular, and
non-symmetrical.
The method abovė specified is the elementary mechanism specially applied
to power looms with connecting rod (mécaniques à bielle). It consists in
leaving the point of attachment of the connecting rod moveable, and in causing
by means of a slot or displacing slide piece, and a stop or moveable support, a
prolonged pressure which after having effected the compression during the
independence of the lifting wires maintains it until they are seized. These
leashing parts may be submitted to many other arrangements producing
always the same result. First method, with an eccentric slot. effecting the
'pressure only during the reascension of the leash box by the displacement of
the attaching point relatively, to the centre of action of the leash box, the
fixture of the connecting rod during the movement of the slide and of the
displacing slide piece both acting on the point of attachment. Second
method, the same displacement slide piece acting alone on the point of
attachment, the fixture taking place at any point of the connecting rod.
Third method, the same as the above turned round, the fixture taking place
at the point of attachment and the displacing slide piece acting on any point
of the connecting rod. Fourth method, displacement slot or slide with
moveable slide piece. Fifth method, displacement slot or slide with fixed
guide.
Part No. 3 of the annexed Sheet of Drawing.-The Drawing represents at
Figure 1 a side view of a jacquard loom with connecting rod, to which loom
is applied No. 4 method with moveable support behind and slide visible,
the compression of the lifting wires taking place when the leash box descends.
Action Rising or lifting of the leash box. The pressure effected according
to the movement of the cylinder ("manchon"), the slot B slides on the pin
of the connecting rod C, held by a moveable spring support placed behind
until it meets the upper end of the slot (the connecting rod is motionless,
and the pressure sustained during this immobility) which carries it along to
drive away the cylinder. Descent of the leash.box.-Return of the slot, which

page_text: by its lower end brings back the pin of the connecting rod back to its first
position upheld by the moveable support, and the pressure being effected the
cylinder T in turning permits the sliding in the slot B of the pin of the con-
necting rod C held by a moveable spring support, which displaces and allows
it to go carried away by the end of the slot, when the upper end of the slot
carries away the connecting rod in its movement, and that the support retires
leaving the slot open, above it a second support arrives, and the movement of
the connecting rod comes and closes the slot, making momentarily its points of
attachment.
:
Figure 2 (Part No. 3 of the Drawing), variation of the first descrip-
tion of movement of the connecting rod by an eccentric slot compres
sion-of the lifting wires, when the leash box reascends support as originally
described. Action.-Lifting of the leash box.-The pressure is not effected:;.
the eccentric slot B descends effecting the pressure by its eccentricity, and
does not draw with it the pin of the connecting rod by its upper end until
after having driven away the moveable support N. Descent of the leash box.
Recall of the pieces into position by the lower end of the slot.
Figure 3 (Part 3), variation of second description of movement of the con-
necting rod by an eccentric slot with displacement support at a point of the
connecting-rod compression of the lifting wires when the leash box rises again.
Action.-Lifting of the leash box. The pressure is not effected, the eccentric
slot.B descends causing the pressure by its eccentricity, and does not draw the
pin of the connecting rod at its upper end until after having brought the
moveable spring support into its groove to permit its descent. Descent.of
the leash box.-Recall of the pieces into position by the lower end of. the
slot, the moveable spring support N not repassing in the groove of the first
movement.
Figure 4 (Part 3), the preceding turned round, the open slot. does
not act on the point of attachment, but on another point of the connecting."
rod.
ActionLifting of the leash box. The pressure is not made, the
eccentric slot.B reascends, acting on the moveable support to cause the
pressure by eccentricity in displacing the pin of the connecting rod C in a
straight slot accordingly as it is carried along. Descent of the leash box.
Recall of the pieces into position by the lower end of the straight slot; the
moveable spring support N does not repass in the groove of the first movement.
Figure 5 (Part 3), variation with slot with fixed displacement guide
compression of the lifting wires in descending or in rising.. Action.-Lifting, of
the leash box. The pressure is not effected, the pin.of the connecting rod C
cannot take into the slot B, the support N opposing it and passing on the
4

page_text: outside causes the pressure to take place ;. by sliding in the straight groove it
regains the slot before rising again by bending the support N. Descent of
the leash box.-Recall of the pieces into position by. the slot; the moveable
support N gives passage to the pin in order afterwards to uphold it, and pre-
vent its returning by the slot.
Figure 6 (Part 3), variation of the fourth description. The displace-
ment piece may according to its form produce the pressure of the leash
box, also either during the descent or the reascent. Action.-Lifting of
the leash box. The pressure may or may not be effected; the pressing
movements is effected by a moveable slot of a shape calculated to force
the pin of the connecting rod to slide to the bottom of the straight groove
which supports it, causing and maintaining the pressure as long as the pin
is under the action of the moveable or shifting slot. Descent of the leash
box. Recall of the pieces; the pin only comes back to its place by bending
the spring of the moveable slot, which retires to place itself under the pin
before the reascent.
Figure 7 (Part 3), loom with elbow or angle piece or cap; loom with
application of the connecting rod ("biélle") modified for this loom. All
the processes of the connecting rod are applicable to it.
In all these Figures the letters of reference are the same, and correspond
with those of Parts 1 and 2 of the annexed Sheet of Drawing.
A, piece with slots or slides; B, slot or slide; C, connecting rod;
T, cylinder of the leash box movement; N, stop or shifting support; M, casing
or frame of the leash box; R, batten carrying the cylinder which forces back
or compresses the lifting wires.
Application of the withdrawing grate or cord lattice to this unleash-
ing. The grate or cord lattice, whether acting directly on the lifting
wires or on the needles, may be added to all the above leashing apparatus,
no matter of which description, but it is applied in a more specially useful
'manner to those which only exercise compression in rising, and those
which have special pieces, some serving for the descending pressure, the
others for the lifting pressure; it modifies advantageously the first by itself,
effecting the compression of the lifting wires in descending when they rest on
the collar board, then instead of pressing on rising, the apparatus (slightly
modified) only maintains or finishes the pressure effected by the grate; s
secondly, it replaces the descending pressure piece by allowing the lifting
pressing piece to work, which ends the movement.
Its application may
therefore always aid in the execution of the methods above set forth by itself
operating the compression in descending during the independence of the lifting

page_text: wires, thus leaving to the apparatus a single action, namely, that of simply
maintaining the pressure until the complete dependence of the lifting. wires.
FOURTH PART (see Part No. 4 of the Drawing).
In all jacquard looms the movement of the batten is directed by the ascent
and descent of the leash box set in motion by the workman; when the leash
box rises the batten recedes to change the card, and when it leaves the
batten batten re-approaches to push the card against the needles.
The apparatus described in the first part of this Specification consists in
interrupting for a moment the carrying away of the batten by the leash box
when this latter reascends. The new means consists in interrupting for a
moment the drawing away of the batten by the leash box when this latter
descends to prevent the pressure until it has rested the lifting wires on the
collar board and left them free. It may be thus designated, a general.means
of obtaining on looms having the ordinary unleashing, that is to say, with
identical pressure in lifting, and in lowering a short pressure during the descent
without changing the pressure during the lifting of the leash box. To fulfil
these conditions, that is to say, to interrupt the movement of the, batten while
allowing that of the leash box to continue and obtain a lifting movement
different to the lowering one, a certain elasticity in the pressure pieces is
an elasticity which brought into play by the descent of the leash box during.
the stoppage of the batten produces the compression, bringing back the
pieces to the resting point when the stop ceases its resistance: This
elasticity is obtained either by means. of counterweights or of springs. The.
counterweights, the springs, and the stop may be placed in different positions.
The apparatuses are very variable.
in
Figure No. 1, (Part 4 of the annexed Drawing).-This Figure represents a
loom with elbow piece, the modified parts being numbered. No. 1, stop
form of a rod carrying a friction roller; No. 2, fixed piece attached to the
batten against which the stop piece comes in its descent; No. 3, spring driving
away the stop when, having arrived at the bottom of its journey, it no longer
bears on the piece No. 2; No; 4, rod bringing back the stop No. 1 beneath
the piece No. 2 to prepare the descent; No. 5, compression counterweight:
acting by its rod on the slotted press and tending to hold the part A pressed
against the part B; No. 6, slotted press with its-friction roller..
Figure No. 2 (Part 4).Front view of part of Figure, No. 1. .:
Figure No. 3 (Part 4).This Figure represents a connecting rod loom
with modification giving to the pressure pieces the necessary elasticity for

page_text: effecting the unleashing by the means above explained. No. 1, elastic arm
of connecting rod, which in the compression bends under the traction of the
support of the connecting rod during the stoppage of the batten; No. 2,
support of the connecting rod.
SUMMARY.
Claim is made to the application of much thinner cards than those hitherto
used as well as to the processes consisting,
Firstly, in leaving the lifting wires free before the compression ("réfoulement").
Secondly, in seizing the lifting wires by means of the leash box during the.
compression.
Thirdly, the application of the retreating grate or lattice to the method
herein described of independence of the pressure moment with all the variations
in the applications as well as their general arrangements.
Fourthly, that of the mobility, no matter in what way the point or one of
-the points of junction or attachment of the connecting rod, having for object
the unleashing and permitting the cylinder (" manchon") to have a movement
independent of that of the batten, whether this mobility be obtained by
means of a sliding slot, springs, counterweight, hinges, or other mechanism,
and and whether it be adopted at the connecting rod, to, the batten, to the
support of the connecting rod, or to the cylinder.
:
⚫ Fifthly, further as the particular combinations by which this improved
unleashing may be effected, while essentially the same, vary too much in form
to be mentioned, they being however all comprised in the general, means
equally applicable to looms. with connecting rod and those with cranked or
elbow piece.
4
.
Claim is therefore made in a general manner to the application of the
system herein set forth to all jacquard looms, no matter what their form, that
is to say, to every combination which allows the leash box,-
Firstly, an ascending movement in which it may take the lifting wires
during the compression.
Secondly, a descending movement in which it will leave the lifting wires
before the compression.
Sixthly, and lastly, claim is made generally to all apparatus having for
object to interrupt the movement of the batten during the rise and fall of the
leash box, whether to prolong the pressure effected or to reduce the pressure
and all combinations tending by these means to obtain the unleashing, forming
te principle of this Invention, namely,-

page_text: Firstly, to re-produce the compression (" réfoulement ")only when the lifting
wires no longer hold to the leash box, and that they rest on the collar board.
Secondly, to cease the compression only when the lifting wires have been
seized and lifted by the leash box.
of
In witness whereof, I, the said William Edward Gedge, have hereunto
set my hand and seal, this Eighteenth day of October, in the
our Lord One thousand eight hundred and sixty-six.
year
W. E. GEDGE.
L.S.)