Improvements in Dobbies, Harness Jacquards, and Undermotions employed in Looms for Weaving.
Year: 1892

page_text: Date of Application, 12th Dec., 1892
Complete Specification Left, 12th Sept., 1893-Accepted, 21st Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Dobbies, Harness Jacquards, and Undermotions
employed in Looms for Weaving.
-I, CHARLES BEDFORD, of 63 Alexandra Road, Shipley, Yorkshire, Machine
Designer, do hereby declare the nature of this invention to be as follows:-
The first part of my invention has reference to dobbies and my improvements
therein consist in employing a vertical lever or radial arm mounted loosely upon a
suitable shaft or stud. On the top of this radial arm is a rack or segment, in
which gears, a gear crank attached by a connecting rod to harness or jack levers
for the purpose of operating the shed. The radial arm is caused to be operated by
means of vertical balk levers carrying catches at each end operated by draw bars
as is usually employed in what is called the Hattersley dobby. The catches
may be connected to the balk levers in the usual manner, but I propose to crank
each end of the balk lever to which the catches are attached, for the purpose of
causing the catches to assume a more horizontal position when drawn out, and also
for the purpose of placing the line of strain at a less obtuse angle to the catches
than formerly. My invention in dobbies also refer to the uprights employed to
support the catches, and my improvements therein consist in enabling one upright
to operate the upper and lower catches, and this is effected by forming on each
upright two additional lugs or projections, the upper projection supporting the
upper catch and the lower projection supporting the lower catch, by which
means one upright is caused to act upon each of the upper and lower catches
respectively.
Secondly-My invention has reference to double lift harness jacquards, and my
improvements consist in the construction of a new device or appliance for attaching
the "neck band" to the upright hooks commonly used in harness jacquards.
According to my invention 1 employ a piece of wire or other material suitably
bent and formed with two upright pieces, at the top of each of which, is a loop or
eyelet, and a little way below each loop the wire is twisted or another loop is
formed, the second or lower twist or loop being employed to rest upon the bottom
of the upright hooks.
To the bottom of this appliance the "neck band" is attached, which is also
attached to the harness which is raised and lowered thereby. This appliance is
placed onto two upright hooks and the double loop keeps the "neck band
vertical position and prevents abrasion of the "neck bands" by lateral or sidewise
movement.
in a
Thirdly-My invention refers to the hooked upright wires used in jacquard
harness, the object of my invention being to so arrange and construct these vertical
wires as to cause them to be retained or held up when required by the pattern
cards. To effect my object instead of having two separate wires as formerly,
three hooked uprights are connected together at the bottom. These three vertical
wires all pass through one needle and are all operated by the card mechanism.
The two outside vertical hooked wires are raised and lowered by the lifting
bars but the third wire is employed for the purpose of retaining or holding up the
harness attached to each series of wires until required to be changed. For the
purpose of unhooking the central vertical wire from its retaining bar the other
hooks are cranked below the needles so that on the said cranked hooks being lifted
to their highest point, the cranked part causes the central hook to be released and
free to be acted upon by the pattern cards..
Fourthly: My invention has reference to what is called an under-motion which

page_text: is employed in looms for pulling down the healds. According to my invention I
mount a segment on a suitable shaft provided with an arm to which a cord is
attached connected to the underside of the heddles or shafts. I also employ
another segment in gear with the one previously mentioned mounted upon a separate
shaft. To this second segment I attach a short connecting link which is connected
by a spiral spring to a corresponding connecting link on the other side of the loom
also connected to the opposite end of the heddles.
This arrangement of toothed segments and spiral springs will draw the healds
and shafts down on being liberated and I would here observe that the teeth of the
segments are eccentric to their centres and this is done for the purpose of
obtaining an increased power or leverage when the heddles are at the bottom.
The eccentric teeth also ensures that the power or pull upon the shafts to be
quickly removed.
Fifthly: My invention relates to what is now called "Kenyon's under-motion,"
protected by Letters Patent No. 296083. In the Specification of this Letters
Patent the underside of the healds are connected to oscillating levers and these
in turn are connected to corresponding levers at the opposite side of the loom by
means of spiral springs. My invention is intended to obtain increased power or
leverage in this description of under-motion, and this I accomplish by an arrange-
ment of compound levers comprising a bell crank lever on one end of which is a
hooked finger attached by leather or other means to the oscillating lever, whilst
the opposite end of the said bell crank lever is connected to a bent form of link
which is attached by a spiral spring to a corresponding set of levers at the other
end of the loom.
By this arrangement of compound levers I attain considerable increased power,
consequently, one spiral spring will effect the purpose of two or more.
This
arrangement of levers also more quickly releases the pull upon the heddles when
they are being changed.
Dated this 10th day of December 1892.
TASKER & CROSSLEY,
Halifax, Agents.
COMPLETE SPECIFICATION.
Improvements in Dobbies, Harness Jacquards, and Undermotions
employed in Looms for Weaving.
I, CHARLES BEDFORD, of 63, Alexandra Road, Shipley, Yorkshire, Machine
Designer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
This invention relates to improvements in dobbies and in harness jacquards, and
also in undermotions employed in looms for weaving; and in order that such
improvements may be clearly understood I will make reference to the accompanying
sheets of drawings wherein
Fig. 1 is sectional elevation of such parts of a dobby as is necessary to illustrate
the application thereto of my invention which consists in the employment of a
vertical lever or radial arm A mounted loosely upon a suitable shaft or stud B.
On the top of this radial arm is a toothed rack or segment C in which gears a gear
crank D mounted on shaft E and attached by a connecting rod F and crank pin P
to the harness or jack levers G for the purpose of operating the heald shafts to
form the shed. The radial arm A is caused to be operated backward and forward
by means of a vertical balk lever H at each end of which are connected horizontal
catches I operated by reciprocating draw bars J or held in position by retaining
bars R as is usual in the Hattersley dobby. The catches I may be connected to
the balk levers H in the usual manner but I propose to crank each end of the said
balk lever as shewn in Fig. 1 for the purpose of causing the catches I to assume a

page_text: more horizontal position when drawn out and also for the purpose of placing the
lines of strain at a less obtuse angle than formerly.
It will thus be seen that as the catches are drawn backward and forward by the
action of the ordinary draw bars J that the lever A will be made to oscillate on its
shaft B consequently the rack C will impart a backward and forward rotary motion
to the gear crank D which will transmit the movement by the rod F to the jack
lever G and also to the healds.
My invention in dobbies also refers to the uprights K employed to support the
catches, and my improvements therein consist in enabling one upright to operate
both the upper and lower catch and this is effected by forming on each upright,
two lugs or projections a and the upper projection supporting the upper
catch and the lower projection supporting the lower catch, by which means
one upright only is required to act upon the upper and lower catch I of
each balk lever H. These uprights K together with a sectional end view of
that end of a weighted lever L which act upon the upright K are shewn in
detail Fig. 2. The uprights K are operated at the proper time by weighted
levers L these being selected by peg lag arrangement M as is well understood.
The grate S is made with projections T which serve as guides to the upright K and
prevents them rubbing against each other; a bar N is also bolted to the grate S
to allow the uprights to move freely up and down.
In Fig. 3 I have shewn a modification of Fig. 1 in this case the gear crank D is
made with two arms N and N' having crank pins P and P' one arm being connected
to the connecting rod F whilst the other arm is connected to another rod F¹. To
the other ends of these rods are attached cords or chains O passing over pulleys P,
which cords are connected to the top and bottom shafts Q of the healds so that on
the vertical lever A being rocked backwards or forwards by the balk levers H
and their respective catches I, the gear cranks are oscillated, in doing which the
healds are raised and lowered positively.
By this arrangement I dispense with the ordinary jack levers G hitherto
employed for that purpose and shewn in Fig. 1.
Secondly. My invention refers to the hooked upright wires used in double lift
harness jacquards, the object of my invention being to so arrange and construct
these vertical wires as to cause the harness to be retained or held up until required
by the pattern cards to be changed. This part of my invention is illustrated in
elevation Fig. 4 and also plan view Fig. 5. The central or hold-up vertical
hooked wire to which the neck band is attached is shewn at a near the bottom of
which it is bent or twisted as at b forming loops which rest on the bottom of the two
outside vertical lifting hooks c supported when at rest by bars d in or on the
grate e. The bar B is fixed upon the grate e to guide the central upright a or
prevent its being pulled sideways by lateral strain of the neck band. The whole
of these three vertical hooked wires pass through the grate e and also through
eyelets formed in the needle f which needle is forced backwards by the pattern
card mechanism but is held forward when released by the open spiral spring g.
The needle when forward as in Fig. 4 places the two outside lifting hooks c into
position to be engaged with the two lifting bars h and i which are shewn at the
extreme extent of their upward and downward positions respectively, and it will
be seen that if the needle, be not acted upon by the pattern cards that one of the
hooked uprights c will engage with its lifting bar and be raised thereby the
middle upright or hold-up hook a will be also raised with it, and the hook a¹ thereon
placed upon the stationary barj úpon which it will rest and remain holding up the
harness threads until the pattern card acts on the needle f and pushes the hook a¹
on the upright a away from the hold-up bar j and so allowing the harness threads to
descend with one of the lifting hooks c and it will remain down so long as the pattern
cards act on the needles and push the hooks away from the lifting bars h and i.
Either of the two outside hooks c will raise the central hook a (each time they
are lifted) clear of the stationary bar j consequently central hook a is left free
to be acted upon by the needle fin either direction.

page_text: In plan view Fig. 5 it is shewn that the opening or slot in the grate e for the
central upright a is only wide enough to allow of the free passage up and down
of the upright a, but the openings or slots. in the grate e for the lifting hooks c,
are much wider than the thickness of the wire uprights d require, in order that
the hook may descend more freely when empty or when the harness is not
descending with it.
Thirdly. My invention has reference to that class of apparatus usually called
an undermotion, which is employed in looms for pulling down the healds.
This part of my invention is illustrated in Fig. 6 where a is a segment provided
with an arm connected by cord e to the underside of the heald shafts, the said
segment being mounted upon stud d. I also employ another segment e in
gear with the one previously mentioned, such other segment e being mounted upon
a separate shaft f. To the upper segment e I attach a short link g which is
connected by a closed spiral spring / to a corresponding link on the opposite end
of the loom and connected in like manner by two segments to the opposite end
of the healds or heddles. This arrangement of toothed segments and spiral springs
will draw the healds and shafts down on being liberated, and I would here observe
that the teeth of the said segments are eccentric to their centres and this is done
for the purpose of obtaining an increased power or leverage when the healds are
at the bottom.
The eccentric teeth also ensure that the power or pull upon the shafts will be
more quickly removed. The full lines in Fig. 6 shew the position of the parts
when the healds are down, and the dotted lines shew the position of the same parts
when the healds are up.
By the construction of an under-motion in the manner herein described and shewn
at Fig. 6 a greater power or downward pull upon the healds is attained from the
springs than is attained by what is now called Kenyon's undermotion protected by
Letters Patent No. 296083. In the drawings accompanying this Specification it is
shewn that the underside of the healds are connected to oscillating levers and
these levers in turn are connected to corresponding levers at the opposite end of the
loom by means of spiral springs.
Fourthly. My invention relates to another means or method of attaining an
increased power or leverage in this description of undermotion which is illustrated
at Fig. 7 of the accompanying drawings, my object being obtained by an arrange-
ment of compound levers comprising a bell crank lever a mounted on a stud b. On
one end of this bell crank lever is a hooked finger c connected by a piece of leather
or other material d to the upper end of the oscillating lever e mounted upon stud f
whilst the opposite end of the said bell crank lever a is connected to a bent form of
link 9 which by spiral spring is connected to a corresponding set of levers at the
opposite end of the loom.
By this arrangement of compound levers I attain considerable increased power,
consequently one spiral spring will effect the purpose of two or more, in addition to
which the compounded levers will more quickly release the pull upon the healds
when they are being changed.
In like manner to Fig. 6 the full lines in the drawings shew the healds as having
been pulled down, and the dotted lines indicate that the healds are raised.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manuer the same is to be performed, I declare that what I
claim is :-
Firstly. In a loom dobby, the combination of the toothed radial lever A, gear
crank D, balk lever H catches I and draw bars J as described and shewn in
Fig. 1.
Secondly. In a loom dobby, the combination of the toothed radial lever A, gear
crank D having two arins and crank pins and connecting rods F and F attached
by cords or chains to the healds, the said parts being operated by balk lever H
hooked catches 1 and draw bars J all as described and illustrated in Fig. 3.

page_text: Thirdly. In loom dobbies the cranking of each end of the balk lever H as shewn
in Fig. 1 for the purposes herein shewn and described.
Fourthly. In harness jacquards, the combination of three hooked upright wires
all passing through the same needle and employed for purposes and operated in the
manner shewn in Fig. 4.
Fifthly. An undermotion employed in looms for weaving, comprising the
segment levers a and e in combination with spiral springs as shewn in Fig. 6.
Sixthly. An undermotion employed in looms for weaving, comprising an oscillating
lever e in combination with a supplementary lever a and spiral springs h as shewn
in Fig. 7.
D
antamba 1902
TASKER & CROSSLEY,
Halifax, Agents.