Improvements appertaining to Loom Dobbies.
Year: 1899

page_text: Date of Application, 4th Oct., 1899
Complete Specification Left, 4th July, 1900-Accepted, 29th Sept., 1900
Improvements appertaining to Loom Dobbies.
I, AMOS LOCKWOOD, of York Crescent, King Cross, Halifax, in the County
of York, Machine Maker, do hereby declare the nature of this invention to be
as follows, that is to say:-
-
It relates firstly to an improved construction of parts arranged in combination,
to enable the pattern surface mechanism on loom dobbies to exercise their con-
trolment over the movements of said dobbies' levers through a great number
of changes and in a varied manner.
In carrying my invention into effect in accordance with one arrangement I
make use of pattern surface mechanism described in my Specification No. 16,376
of 1893 and to this I add supplementary pattern mechanism for controlling
the movements of the said primary mechanism.
The supplementary mechanism is so arranged that it brings ratchet mechanism
into or places it out of operation for causing a cam to allow another ratchet to
fall into or rise out of the path of motion of the ratchet wheel on the primary
cylinder, thus the movements of this latter may be regulated to bring any one
or other of its peg-lags or other divisions of its pattern surface, to repeatedly
act upon the levers of the dobby, to cause same to maintain their positions to
hold the warp threads separated during several revolutions of the loom or to
enable several shots of weft to be thrown into one and the same shed or opening
in the warp.
The ratchet mechanism for operating the cam is arranged to do so for each pick
or shot of weft, whenever put into action by the supplementary pattern
mechanism.
By arranging the cam mechanism so as to act in a differential manner, and
the supplementary pattern mechanism to govern same, the suspension of the
primary cylinder's rotary motion may be extended as long as desired, while by
coupling the take-up-motion to the ratchet which is put into and out of gear
for operating said primary cylinder, the taking-un of the fabric woven may
also be suspended. so what is known as a cram may be produced.
"
"
In accordance with the second part of my invention I make use of the mechanism
somewhat as set forth in the Specification of Letters Patent granted to me.
the same being numbered 3542 of 1897, but instead of employing a continued
series of pattern or indicating pegs on the supplementary cylinder I only employ
one peg for each change, and this I make to perform both of the functions of
causing the primary cylinder to rest or dwell when passing from one series of
pattern lags to the other whether such change he from one series or from the
other of its pattern lags, while the time of said rest or dwell can, by the means
I now employ, be extended to enable the several parts to perform their functions
more efficiently.
To attain this object I arrange the double inclined piece or notched lever.
which brings the cylinder operating ratches into a central position, or out of
contact with their wheel on said cylinder, to be operated by the sections of an

page_text: inclined swivelling piece mounted upon it being raised by a sliding piece carried
by a sliding rod.
This sliding piece in an ordinary way allows the sliding rod to move beneath
it and its actions are transmitted to the supplementary cylinder, however when
a peg or projection on the pattern surface of the supplementary cylinder is
brought into position thereon certain levers and intermediate parts are moved
to secure the sliding piece to the sliding rod so that on its next advancing move-
ment it acts upon the notched lever as desired after which it recedes and remains
inactive until another peg is brought into position to again indicate for its
movements, thus there is only the same number of pegs to be used as there are
changes required, and the inclined swivelling lever and sliding piece can be
shaped to effect any desired length of dwell.
The third part of my invention relates to loom shedding mechanism of the
class wherein each peg-lag or pattern card is made to carry two distinctive and
separate sets of pegs or holes for two separate and different designs to be pro-
duced and consists in the application of means whereby I am enabled to make
use of pattern cylinder mechanism which only transmit rotary motion to such
cylinder and yet the pattern surface thereon is made to exercise two distinct
or two separate functions on said operating levers at each of its said movements
when desired so to do.
In carrying this part of my invention into effect I mount sliding pieces to
intervene between each of the interceding levers and the draw hooks of the
shedding mechanism and these sliding pieces are formed that when they are in
one position one series of the pegs in the peg-lags will operate their respective
series of hooks, while when they are in another position on the other or neigh-
bouring peg will be brought into use to operate the other series of hooks on
one class of shedding mechanism of the same series at another time in another
class of mechanism, and that without moving the pattern cylinder at such time
laterally or in its circular path.
When the heddle operating levers are to be put into use in a straight forward
or regular manner, I arrange mechanism to transmit motion to the sliding
pieces so that for one pick or shot of weft said pieces are in one position, and
for the next shot they are moved into their other position the former being for
enabling one series of pegs to act, and the latter to enable the other series to
be brought into operation.
When the two series of pegs are to be used to produce two distinct and
separate designs in the fabrics the mechanism for operating the sliding pieces
is arranged to be under the control of a supplementary pattern surface so that
its functions are regulated according to what is desired by such supplementary
pattern cylinder.
Dated this 3rd day of October 1899
COMPLETE SPECIFICATION.
Improvements appertaining to Loom Dobbies.
I. AMOS LOCKWOOD, of York Crescent, King Cross, Halifax, in the County
of York, Machine Maker, 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, that is to say:-
:-
It relates to loom shedding mechanism of the class wherein each peg-lag or

page_text: pattern card is made to carry two distinctive and separate sets of pegs or holes
for two separate and different designs to be produced and consists in the appli-
cation of means whereby I am enabled to make use of pattern cylinder mechanism
which only transmits rotary motion to such cylinder and yet the pattern surface
thereon is made to exercise two distinct or two separate actions on said operating
levers at each of its said movements when desired so to do.
In the accompanying sheets of drawings my invention is illustrated as applied
to shedding mechanism of dobby looms and in said drawings:-
Figs. 1 and 2 are front and back elevations of said shedding mechanism.
Fig. 3 is
view of a portion of said mechanism as seen from above.
Fig. 4 is a sectional elevation of said mechanism with the framework removed
for the sake of clearness.
Fig. 5 is a similar view to a portion of Fig. 4, but shows certain of the parts
in other positions as hereinafter explained.
Fig. 6 is a detail drawing illustrative of certain of the levers, hereinafter
referred to, as seen from above.
Fig. 7 is a side elevation showing a modification of means for operating certain
of the parts hereinafter described, for instance when requiring a plain pattern
that is, one lag two shots of weft.
In carrying my invention into effect. I mount sliding pieces a to intervene
between each pair of interceding levers 66 and the draw-hooks or sliding bars 8
of the shedding mechanism, and these sliding pieces a are formed so that when
they are in one position, say, as that shown by Fig. 4, one series of pegs c and
consequently one series of levers 6 will operate the bars 8 (putting them into
contact with or into the path of motion of their draw-bars 18 and 19 with the
results well known) through the medium of the sliding pieces a, levers d, con-
necting springs e, and sliding pieces f, while when they are in another position,
as that shown by Fig. 5, the other or neighbouring series of pegs c¹ will he
brought into use to operate the other series of levers 61 which will, through,
the medium of the same parts a, d, e and f, operate the bars 8, thus I am
enabled to have one series of pegs c arranged in order to produce one pattern
in the fabric being woven, and the other series to produce another pattern
in said fabric. To bring each series of pegs cor d into operating effect to
produce the two said designs, the pattern barrel g is intermittently rotated for
each shot or pick of weft and the sliding pieces a are kept in their rear forward
positions as shown by Figs. 4 and 5 respectively, during the whole of the time
that one or other of said series of pegs cord is being thus made use of.
This
The sliding pieces a are mounted on their pivotal shaft h which is carried by
the lever arms k, k¹ these being mounted, upon the oscillating shaft m.
shaft m is oscillated by means of the lever m¹ being pressed into contact with
the cam-piece n by the spring so that on the said cam-piece n, being moved
into the position shown by Fig. 1, the lever m² is moved by the spring 。 to
bring the sliding pieces a into their rear positions shown by Fig. 4, while when
the cam-piece is moved so that the bowl on the lever m² rests upon one or
other of the raised parts n¹ of said cam piece, then the sliding pieces a are
moved forward into the position shown by Fig. 5, the lateral projections 611 on
the levers b, 61 being made to extend under the lower surfaces of the sliding
pieces a so as to properly lie in their several and respective paths.
The cam-piece is operated by means of the ratchet wheel p which derives
its intermittent rotary motion from the ratchet pl whenever its operating lever q
is raised by the sliding bar 8 to which it is coupled by the rod 71, said sliding
bar 8 being similar to those which are employed in the machine to operate the
heddle levers r by the connecting rods r¹ so that the movement of such lever q
is effected and controlled by the said bar 8 and its pattern pegs c, c¹ as are the
heddle levers r.
In order that the ratchet p¹ may not operate its wheel P at every movement
of the lever but only at such times as may be desired for the production of

page_text: the required pattern or design, I employ a supplementary pattern cylinder S
(which is operated by the ratchet S¹ carried by the lever q) carrying peg-lags t,
the pegs of which hold the ratchet p¹ against the actions of its gravity
weight p out of the path in which lies the wheel p. From the foregoing it
will be seen that I can arrange the pattern surface on the peg-lags u (or in
case of pattern cards being used in place of these by the substitution and use
of well known parts) to produce two designs, one of which I may have often
repeated while the other is brought into action when necessary and may be
more or less often repeated than the other as requirements demand.
The pattern barrel 9 is operated at each pick or for each shot of weft by means
of its ratchet g¹ being carried by a lever g" which is operated by the lever v
this lever is operated by the treadle lever which is actuated by and at each
revolution of the low shaft of the loom, the said lever vis mounted in position
relatively with said lever g and coupled thereto by rod V¹ its actions being to
force the ratchet g¹ against the teeth of its wheel gli as the lever gl¹¹ is approach-
ing its highest position shown by Fig. 1 or as it is approaching its
lowest position shown by chain lines in same figure.
Provided the pattern surface u and its series of pegs c, el are to produce only
one design and thus the barrel will have only to move once for every two
shots of weft, which movement is attained by the use of well known means,
then the sliding pieces a are made to move (as by being forced in one direction
by the projection won the rod and in the opposite direction by the projection w¹
on same rod) so that for one shot of weft the series of pegs c are in effective
operation while at the next pick or shot of weft the pegs are brought into
use.
Although I have only described my invention and shown it as applied to
shedding mechanism of one class, it will be obvious to those conversant with
such mechanism that it might be with equal advantages applied to or made use
of in connection with other classes of such mechanism wherein double the
number of interceding levers b, b1 as compared with the sliding bars 8 or their
equivalent, draw hooks are employed.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. In loom shedding mechanism, the combination of levers kupon rocking
shaft m, lever m', cam piece m, ratchet wheel p, ratchet p¹, cylinder S, lags t,
and pegs t, whereby the several movements of the sliding pieces a are effected,
in the manner and for the purposes set forth.
2. In loom shedding mechanism, a pattern barrel carrying two series of
indicating surfaces, and means whereby such series may respectively be brought
into effective operation, substantially as set forth.
a
3. In loom shedding mechanism, interceding levers b, b¹, sliding pieces
operating in connection with same, and means whereby such sliding pieces may
be moved to bring said interceding levers into effective operation, substantially
as herein specified.
Dated this 3rd day of July 1900.
JOHN E. WALSH,
Waterhouse Chambers, Crossley Street, Halifax,
Patent Agent for the Applicant.