Shedding Motion for Looms, for Weaving all kinds of Fancy Cloths by a Positive Shed.
Year: 1889

page_text: Date of Application, 19th Mar., 1889
Complete Specification Left, 19th Dec., 1889-Accepted, 1st Feb., 1890
PROVISIONAL SPECIFICATION.
Shedding Motion for Looms, for Weaving all kinds of Fancy Cloths
by a Positive Shed.
SAMUEL WALKER, Engineer and Machinist, Radcliffe, Lancashire, and GEORGE
LEEK, Manager, 72, Victoria Street, Radcliffe Lancashire, do hereby declare the nature
of this invention to be as follows:-
Any number of jacks or treadles may be arranged to work on a shaft on the top of
the loom, immediately above the warp, these treadles have a projection cast on them
and on this projection is cast a peg or pap, working on which is an anti-friction bowl,
the bowl in turn works in a groove of a horizontal tappet or cam, the tappets are
arranged to slide backwards and forwards and have a projection cast on them, on these
projections are cast two pegs or paps, attached to which are two hooks, these hooks being
moved backwards and forwards by two knives, the knives being connected to two
rocking levers, which are fastened to a rocking shaft. At the opposite end of one of
the rocking levers is coupled a connecting rod which is in turn connected to a wheel
provided with a slot and stud which stud can thereby be regulated to give the
necessary stroke, the aforesaid wheel being driven from a wheel on the end of the
crank shaft or other suitable place. Immediately under the aforesaid hooks are fixed
two pattern chain barrels, one under each set of hooks, round these barrels work
pattern chains; the barrels and chains may be either wood, metal or other suitable
material. The projections on the chains are arranged to lift the hooks out of the way
of the knives when a change of shed is not required. The chain barrels are worked by
star wheels and peg wheels which in turn are driven from bevel wheels connected to
the crank shaft of the loom or other suitable place.
DJ 101
1000 سكني
SAMUEL WALKER.
GEORGE LEEK.
COMPLETE SPECIFICATION.
Shedding Motion for Looms, for Weaving all kinds of Fancy Cloths
by a Positive Shed.
We, SAMUEL WALKER, of Radcliffe, in the County of Lancaster, Engineer and
Machinist, and GEORGE LEEK, of 72 Victoria Street, Radcliffe, in the County of
Lancaster, Manager, 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 :—
The object of the invention is to provide a pattern shedding mechanism for looms
for weaving various kinds of fancy cloths in which a positive up and down motion
will be given to the "jacks" or levers which actuate the healds without the interven-
tion of springs.
The invention will be fully described with reference to the accompanying drawings,
which show the apparatus constructed according to our invention.
Fig. 1, front elevation showing our improved mechanism in position when at work.
Fig. 2, front elevation of apparatus on an enlarged scale.
Fig. 3, front elevation partly in section with frame work removed, showing cam and
jacks in reverse position to that shown in Fig. 2.
Fig. 4, side elevation.
Fig. 5, modified form of comb rail.
A frame work A, constructed to carry the several parts of the mechanism is mounted
hows the lace being securely attached by the arm a to the side or frame A' of the

page_text: "'
loom. The "jacks" or heald levers B, which actuate the healds are placed imme-
diately above the warp yarn and are pivoted on a shaft C placed across the
top of the apparatus and carried by brackets c one attached to each side of the frame A.
Any number of the jacks or heald levers B may be used according to the number of
healds in the loom and are placed side by side on the shaft C, each free to move or be
moved independently of the others in the usual way.
As each jack or lever B is alike and each is actuated by similar mechanism, we will
describe the invention as applied to the working of one jack or lever B.
Below the jack or heald lever B, is a sliding tappet or cam D, which works to and
fro in a horizontal plane being supported at each end in the comb rail E, which
stretches across and is secured to each side of the frame A. The ends d of the cam or
tappet D slide in the slots e in the comb rails E. On the under side of the jack or
heald lever B is a projection or lug B' with a peg or stud at its lower end on which is
placed an anti-friction bowl. This anti-friction bowl b works in the groove or slot
in the horizontal sliding cam or tappet D and as the cam or tappet moves to and fro
the anti-friction bowl bis caused to traverse the slot and lifting the projection B' up
and down causes the jack or heald lever B to oscillate on the shaft C, on which it is
pivoted. When the machine is working the cam or tappet D is moved first in one
direction and then in the other so that a positive movement first up and then down is
given to each end of the jack or heald lever B.
To a projection on the underside of the sliding cam or tappet D, are pivoted two
hooks F which point in opposite directions and engage with reciprocating sliding
knives or bars G with inclined edges.
The hooks Fare notched or indented towards their points to receive the knife bar G.
so that either bar G may move the sliding cam D, either backwards or forwards or
alternately backwards and forwards as may be required.
The knife bars & are placed one at either side of the apparatus and are moved to
and fro simultaneously, in the slides a' in the frame A by the rocking levers H. The
rocking levers H are pivoted to the shafts I and form in connection therewith a cranked
lever, the lower members of the levers being preferably connected together by a bolt
or stud-pin carrying an antifriction bowl ' attached to the end of one of the
lovers H is a connecting rod K which at the other end is pivoted on the crank pin L
affixed to the side of the spur wheel M. The spur wheel is driven from the crank
shaft or other convenient part of the loom and as it rotates it communicates a recipro-
cating movement to the connecting rod K and a rocking movement to the levers H
which carry the knife bars to and fro simultaneously.
The hooks F rest upon the ends of a bar or lever N which is pivoted or provided
with a fulcrum at two points n-n and held down at the centre by a spring which
draws it back when the pattern pins or pegs pass from under it. Below the lever N are
placed two chain barrels O, one under each end each carrying pattern chains R,
formed of lags in the usual way with pins or pattern pins or pegs inserted at intervals
to form the pattern. The pattern barrels O and the lags of the chains R may be con-
structed either of wood or metal as desired.
The pattern barrels O are driven from the upright shaft P by the bevel wheels p the
pin wheel pland the star wheels o. The pin wheel p' is provided with a pin o' which,
at each revolution of the wheel alternately moves the star wheels one eighth of a
revolution. The lags of the pattern chains R are so placed or arranged upon the
pattern barrels O that one lag will be on top of the barrel during the period of rest or
dwell, while the pin wheel pl makes each revolution.
One end of the jack or heald lever B is connected to the top stave T of one of the
healds by a string or cord t and the other end is connected in a similar way to one
end of the bottom jacks or levers S by the string or cords which are pivoted under
the loom below the healds.
.
The other end of the bottom jacks S are connected to the bottom staves T of the
healds by the strings or cords (see Fig. 1,) so that as the jacks B are moved up and
down the healds are raised and lowered by a positive action whereby they are lifted or
drawn down into the required position to form the shed.

page_text: In weaving light cloths wherein the tension on the warp threads is but slight, we
attach to the comb rail E a bar E' carrying small flat springs el which bear against
the ends d of the tappets and prevent them moving backwards until actuated by the
knife bars (see Fig. 5).
The operation of the mechanism is as follows:-
When the loom is at work a continuous movement is conveyed to the spur wheel M
from the crank shaft and that is transmitted by the connecting rod K and rocking
levers H to the knife bars G which have a continuous reciprocating movement,
moving in one direction for each shot or pick. A continuous movement is also given
to the pin wheel pl which actuates the pattern barrels and these are moved forward
alternately one for each shot or pick to change the shed as required. When the
lever N is horizontal (in the position shown in Fig. 2) the hooks Frest on its turned
up ends and the knife bars G move to and fro under them without engaging with them
and the shed so far as relates to the particular heald to which the jack B is connected
remains unaltered. As the pattern requires the movement of the healds in the altera-
tion of the shed, a pin or peg (as in Fig. 3) raises one end of the lever N depressing
the other end which allows the hook F, resting on the depressed end to fall and engage
with the reciprocating knife bars G below it and carry it with it during its next
movement. By the action of the knife bar G on the hook F the sliding tappet is also
moved in the same direction and the position of the jack B reversed.
When the cam
or tappet D is drawn to the left hand, the projection B', and anti-friction bowl bon
the jack or heald lever B are depressed, and the right hand end of the jack or lever B,
drawn down (see Fig. 2) and when the cam or tappet is moved to the right the reverse
movement takes place and the right hand end of the jack or lever B, is raised and the
other end drawn down (see Fig. 3). The pins or pegs on the pattern chain may be
arranged either to lift the hooks out of contact with the knife bars as described or to
lift them into contact with the the knife bars if so required.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what
we claim is
1. A shedding apparatus or mechanism for looms having a reciprocating sliding
cam or tappet to actuate the jacks or heald levers moved as required by two con-
tinuously reciprocating knife bars with which two hooks carried by the cam are
caused to engage by the pattern chains substantially as and for the purpose
described.
2. A shedding apparatus or mechanism for looms having a reciprocating sliding
cam or tappet to actuate the jacks or heald levers, two hooks attached to the cam
or tappet one at each side, two continuously reciprocating sliding knife bars (G)
to engage with the hooks and give a motion to the sliding cam in both directions as
required by the patterns, and two pattern barrels (0) and chains (R) substantially as
and for the purposes described.
3. A shedding mechanism or motion for looms for weaving fancy cloths constructed
and arranged substantially as herein described and shown.
Dated this 18th day of December 1980
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.