for Levelling the Healds of Looms for Weaving.
Year: 1885

page_text: for Levelling the Healds of Looms for Weaving.
We FRANK LEEMING, Machine Maker, and ROBERT WILKINSON, Overlooker,
both of North Vale Works, Bradford, in the County of York, do hereby declare the
nature of our said invention for "IMPROVEMENTS IN MECHANISM FOR WORKING OR
OPERATING AND FOR LEVELLING THE HEALDS OF LOOMS FOR WEAVING" to be as
follows:-
This invention consists of improved mechanism to be employed in working or
operating the healds of looms for weaving, and of apparatus for levelling the healds,
so constructed and designed as that the healds may be worked as open shed or
centre shed at will and being an improvement, enlarging the utility of an inven-
tion for which Letters Patent No 22335 were granted to the present applicants.
According to this our present invention, we employ like levers, composed of two
parts, operated by reciprocating cross bars, and cross shafts, to those described and
illustrated in drawings of specification N° 223380. Such levers we employ in
duplicate the heald cords ends of the said levers are "end to end" and being also
connected to each other by horizontal or cross links, and to the centre of each link
is binged a vertical link, the lower end of which is attached to one arm of the jack
or heald levers-The joints of the horizontal or cross links, as also of the vertical
links, act as fulcrums-so that as the jointed levers are operated by their
reciprocating cross bars, or cross shafts, motion is communicated by the horizontal
links, and by the vertical links to the heald levers-When the duplicate levers are
both operated alternately the motion is on the centre fulcrum, and the healds
remain up so long as this order of treadding is continued.
"
For levelling the healds, we connect the rocking arms, which operate the
reciprocating cross bars or shafts," by means of a jointed rod or bar, to which a
connecting rod and levelling handle are attached, so that when it is necessary to
level the healds, the handle on being forced downwards, will cause the cross bars
to lift all the levers, to one position, and level the healds-When the handle is put
back, the levers and healds resume their original position.
When weaving centre shed, but one pattern barrel is employed, and the jointed
rod connecting the rocking levers, is made rigid by a pin, passed through it, and
one of its ends is placed on a stud nearer the axis of the rocking lever, so that one
set of reciprocating levers, are caused to traverse by the cross bar one half or less
distance than their previous traverse.

page_text: Improv
for Levelling the Healds of Looms for Weaving.
We FRANK LEEMING, Machine Maker and ROBERT WILKINSON, Overlooker, both
of North Vale Works, Bradford in the County of York do hereby declare the nature
of our invention for "IMPROVEMENTS IN MECHANISM FOR WORKING OR OPERATING
AND FOR LEVELLING THE HEALDS OF LOOMS FOR WEAVING" to be as follows:―
This invention consists of improved Mechanism to be employed in working or
operating the healds of looms for weaving and of apparatus for levelling the healds,
so constructed and designed as that the healds may be worked as open shed or
centre shed at will and being an improvement enlarging the utility of an invention,
for which Letters patent Number 223383 were granted to the present Applicants
and 15,979 granted to the said Frank Leeming.
Such being the nature and object of our said Invention, the following is a
complete description of same, reference being had to the accompanying drawings
forming a part of this Specification in which
Fig. 1. is a side elevation of our improved duplicate dobby or duplicate heald
operating Mechanism for use in open shedding.
Fig. 2. is a side elevation of the same apparatus as used in centre shedding.
According to this our present invention we employ like levers, 1. 2. composed of
two parts operated by reciprocating cross bars or rollers 3. 3. and cross shaft 4. 4.
to those described and illustrated in drawings of Specification Number 223383.
Such levers 1. 2. we employ in duplicate, the said levers 1. 2. are end to end,
and being also connected to each other by horizontal or cross links 6, there being
a like cross link 6. vertical link 7, and jack lever 8 to each pair of levers 1. 2. and
to the centre of each cross link 6 is hinged a vertical link 7 the lower end of which
is attached to one arm of the jack or heald levers 8 the joints of the horizontal or
cross links 6. as also of the vertical links 7 act as fulcrums, so that as the jointed
levers 1. or 2. as the case may be is operated by its reciprocating cross bars or
rollers 3. 3. and cross shafts 4. Motion is communicated by the horizontal links 6
and by the vertical links 7. to the heald levers, the fulcrum then being the end 5
of the opposite lever 1 or 2.-When the duplicate levers 1 2. are operated
alternately the motion is on the centre fulcrum 9 and the healds remain up so long
as this order of treading is continued.
For levelling the healds, we connect the rocking arms 10. 11. which operate the
reciprocating cross bars or shafts 3. 3.-4. 4. by means of a jointed lever in lieu
of a rigid rod or bar 12. to which a connecting rod 13 and levelling handle 14 are
attached, so that when it is necessary to level the healds, the handle on being
forced downwards, will cause the cross bars 4. 4., to lift all the levers to one
position and level the healds. When the handle is put back, the levers and healds
resume their original position, or position from which they were so moved-In open
shedding the rocking arm 11. is drawn by means of the rod 15. which receives its
motion from the sweep 16. on the bottom or tappet shaft.

page_text: There are pattern cylinders 17. 18 to operate the indicating or loose part of the
levers 1 and 2 and when the rocking lever 11 is at its highest lift the roller 3. is
then clear of the indicating part of the Lever 2. the cylinder is then turned or
moved, whilst by means of the connecting rod 12. and the lever 10. the roller 3 ou
the opposite or lift side of the dobby will be at the extremity of its stroke and
under or over the indicating or loose part of the lever 1.
When the rocking lever 11 discends to its lowest position the opposite lever 10
and its roller 3 will be clear of the indicating part of the lever 1 and the pattern
cylinder 17 mounted upon a slotted lever 18 so as by means of handle 19 to admit
of its being lowered out of contact with the indicating or loose part of the lever 1
for the purpose of (after the healds have been levelled as described) drawing each
or any particular heald up and clear of the remainder; this is of great advantage
for facilitating ascertaining that all the ends of the Warp are intact.
When weaving centre shed, but one pattern Cylinder 18 is employed for
operating its levers 2. Cylinder 17 remaining stationary, and the jointed rod 12
connecting the rocking levers 10. 11. is made rigid by a pin 15 passed through it,
and its end 12ª is placed on a stud 16 nearer the axis 16 of the rocking lever 11,
so that one set of reciprocating levers 1. 2. are caused to traverse by the cross
bars 3. 3. half or less distance than their previous traverse.
The rocking lever 11 is now connected by means of its rod 15 to the sweep 16.
on the top or crank shaft of the loom, and when in its highest position the
levers 2 are all level and their indicating or loose ends are clear of the roller 3. the
Cylinder is now turned whilst by means of rod 12 as before described the roller 4
connected to rocking lever 10 is at its full stroke but which is half its former
traverse as described in relation to open shedding the Cross links 6. and vertical
links 7. hold the jack levers 8. in the central or horizontal position.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is :-
1. The duplicate levers 1. 2. connecting link 6. link 7. all in combination and for
purpose herein set forth.
2. The duplicate levers 1. 2. connecting link 6. link 7 in combination with the
levelling apparatus all substantially as illustrated and herein described.
3. The hand lever together with the slotted connections for raising and lowering
the indicating cylinder in combination with the appliances for levelling the yarn
all substantially as illustrated and as herein set forth.
Dated this twenty fourth day of March 1886.