IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1882

page_text: LETTERS PATENT to John Leeming and Frank Leeming Machine Makers and
Robert Wilkinson, Overlooker all of Bradford in the County of York for
an invention of "IMPROVEMENTS IN LOOMS FOR WEAVING."
PROVISIONAL SPECIFICATION left by the said John Leeming, Frank
Leeming, and Robert Wilkinson at the Office of the Commissioners of
Patents on the 13th March 1882.
JOHN LEEMING and FRANK LEEMING Machine Makers and ROBERT WILKINSON
Overlooker all of Bradford in the County of York. "IMPROVEMENTS IN LOOMS
FOR WEAVING."
"
This invention relates, Firstly to improvements in the construction combination
and arrangement of the knives and draw bars of (positive dobby) so that the draw
bars and knives may form either single or double catches at will or as determined by
the card or pattern mechanism Secondly To improved combination of springs and
catches (operated by slide bar) whereby the tumblers are held in proper position
admitting the cylinder being turned without altering or affecting the position of
the tumblers so far as relates to the two last indicated picks Thirdly improved
apparatus for levelling the healds Fourthly. To improved construction of pattern
peg and appliance for securing same in the lags, barrel or other pattern mechanism,
Fifthly, To improved fast and loose reed motion Sixthly To improved mechanism
for gauze or
cross" weaving The draw bars for actuating the "knives are
three in number arranged one above the other and the upper and lower ones are
connected to each other, the central one working between the two. The knives
are in pairs and connected to vertical cam slides for operating the top jack levers
each knife has double catches or snecks one in the upper edge and one in the lower
edge so as when placed by the needles and pattern mechanism to be acted upon by
the upper or lower or the central draw bars the upper draw bar engages with the
sneck or notch in the upper edge of the top knive whilst the upper edge of the
central draw bar engages with the notch formed in the under edge of the top knife,
the lower draw bar acts in conjunction with the under notch of the bottom knife
and the under part of the central draw bar acts on the notch on the upper edge of
the lower knife.

page_text: The knives are operated and put into position for the draw bars by means of
pegs acting upon and charging a blade spring attached to the under side of each of
the tumbler levers the ends of the latter are held by spring catches until the next
forward movement of the draw bars whereon an adjustable arm or bar comes in
contact with the upper ends of the spring catches and pressing these back releases
or sets free the ends of the tumbler levers (at alternate picks) which levers being
acted on by peg then raise (by the needles) the knives or permit the latter to fall
into position to engage with the draw bar or bars according to the change of shed
or as the pattern being woven may require
For levelling the healds and warp the cam slides which operate and lock the
jack levers work upon and along cross guide bars carried by T levers (one of the
latter on each side of a supporting frame) to one of the T levers is attached a hand
slotted lever by means of which the cross bars and cam slides are raised or lifted
thereby permitting the upper jacks to descend to the central position whilst the
lower levers are lifted by means of a cross rod or bar so that the whole are brought
into a central position and the warp is levelled
In the improved peg lag or barrel peg the pegs are of metal and have formed on one
end thereof a head or button which is received in counter sunk portion of hole formed
through the lag, the peg being put in and through lags from the back thereof and
when all the pegs are so inserted a blade spring or other covering secures the pegs
in position the covering may be removed at pleasure and the pegs changed to other
holes for other pattern. The defect of wooden pegs either by "drying" in or
other cause falling out and so dis-arranging the pattern is avoided and remedied.
The fast reed is secured by slide locking pieces shot or bolted (across fingers
connected with the reed rod) by means of lever and friction bowl operated by the
latter entering an adjustable cam groove or cam fork fixed under the breast beam
BO as to be fast for the beat up. When the slay recedes the bowl and lever and
locking pieces are again operated when running out of the cam groove referred to
withdrawing the locking pieces or bolts behind the holding fingers of the reed bar
and the reed is then loose or free to open should the shuttle be trapped in the
latter event when the reed flys open its movement puts a catch lever in gear with
a spring catch and prevents the reed closing until the shuttle is recovered and the
loom adjusted.
In the weaving of "gauze" or other fabrics or "cross weaving" we employ a
cam slide so formed and acting upon a jack lever as to depress and lock the latter
at the bottom that is to say when the shed is down and thereby dispensing with
springs or weights for holding the healds.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Leeming, Frank Leeming, and Robert Wilkinson in the
Great Seal Patent Office on the 13th September 1882.
JOHN LEEMING and FRANK LEEMING Machine Makers and ROBERT WILKINSON,
Overlooker all of Bradford in the County of York "IMPROVEMENTS IN LOOMS
FOR WEAVING"
"
This invention relates-Firstly-to improvements in the construction, com-
bination and arrangement of the knives and draw bars of (positive dobby) so that
the draw bars and knives may form either single or double catches at will or as
determined by the card or pattern mechanism. Secondly-to improved combination
of lever and catches (operated by slide bar) whereby the tumblers are held in
proper position admitting the cylinder being turned without altering or affecting
the position of the tumblers so far as relates to the two last indicated picks-
Thirdly improved apparatus for levelling the healds-Fourthly-to improved
construction of pattern peg and appliance for securing same in the lags, barrel or
other pattern mechanism-Fifthly-to improved mechanism for gauze or "cross
weaving-The draw bars for actuating the "knives" are arranged one above the
other and the upper and lower ones are connected to each other, the central one
working between the two. The knives are in pairs and connected to the vertical
cam slides for operating the top jack levers each knife has double catches or snecks
one in the upper edge and one in the lower edge so as when placed by the needles
and pattern mechanism to be acted upon by the upper and lower or the central
draw bars the upper draw bar engages with the sneck or notch in the upper edge
of the top knive whilst the upper edge of the central draw bar engages with the
notch formed in the under edge of the top knive, the lower draw bar acts in con-
junction with the under notch of the bottom knife and the under part of the
central draw bar acts on the notch on the upper edge of the lower knife.
The knives are operated and put into position for the draw bars by means of
pegs acting upon and charging a blade spring attached to the under side of each of
the tumbler levers the ends of the latter are held by weighted catch until the next
forward movement of the draw bars whereon the end of lever comes in contact with
the underside of the tumbler lever (at alternate picks) which lever being acted on
by the weighted lever then raises (by the needles) the knives and permits the
latter to fall into position to engage with the draw bars according to the change of
shed or as the pattern being woven may require.
For levelling the healds and warp the cam slides which operate and lock the
jack lever work upon and along cross guide bars carried by T levers (one of the
latter on each side of a supporting frame) to one of the T levers is attached a hand
slotted lever by means of which the cross bars and cam slides are raised or lifted
thereby permitting the upper jacks to descend to the central position whilst the
lower levers are lifted by means of a cross rod or bar so that the whole are brought
into a central position and the warp is thus levelled.
In the improved peg lag and barrel peg, the pegs are of metal and have formed
on one end thereof a head or button which is received in counter sunk portion of
hole through the lag, the peg being put in and through lags from the back thereof
and when all the pegs are so inserted a blade spring or other covering secures the
pegs in position the covering may be removed at pleasure and the pegs changed to
other holes for other pattern. The defect of wooden pegs either by "drying" in
other cause falling out and so disarranging the pattern is avoided and remedied-
In the weaving of " guaze or other fabrics or "cross weaving" we employ a cam
دو

page_text: slide so formed and acting upon a jack lever as to depress and lock the latter at
the bottom, that is to say when the shed is down and thereby dispensing with
springs or weights for bolding the healds.
Such being the nature and object of this our invention we will now proceed to
describe the same in detail and in order that the invention may be fully understood
we have hereunto annexed 5 sheets of drawings and have marked the same with
figures and letters of reference like letters referring to the same parts in the several
views or figures.
DESCRIPTION OF THE DRAWINGS.
Fig: 1 is a side elevation of dobby having our improvements attached-Fig: 1ª
is a side elevation of tumbler lever and blade spring-Fig: 2 is a side elevation in
section Fig: 2 is a side elevation of weighted catch lever about full size-
Fig 3 is an end elevation in section through line A. B of fig: 1-Fig: 4 a plan-
Fig 5 side elevation of lag, pattern peg and holding device-Fig: 6 end elevation
of Fig: 5-Fig: 7 a plan-Fig: 8 is elevation of knife and draw bars about full
size Fig: 9 is a modification where three knives are employed-Fig: 10 is a
side elevation of cam slide for guaze weaving.
:
The draw bars 1. 2. 3. 4 for actuating the "knives" are arranged one above the
other and the bars 1 and 4 are connected to each other by the brackets 5. 6 the
central bars 2. and 3 being united and working between bars 1 and 4. The
knives 7. 8 are connected to the vertical cam slide 9 which latter operates the top
jack lever 10. each knife 7. 8 has double catches or snecks one in the upper edge
and one in the lower edge so that the knives 7 and 8 are placed by the needles 13. 14
and pattern pegs and lags, 15 in position to be acted upon by the upper bar 1 or
lower bar 4, or the central draw bars 2. 3 The upper draw bar 1 engages with
the sneck or notch a in the upper edge of the top knive 7 whilst the upper edge
of the central draw bar 2 engages with the notch 6 formed in the under edge of
the top knive 7 the lower draw bar 4 acts in conjunction with the under
notch d of the bottom knife 8 and the under part of the central draw bar 3 acts
on the notch c on the upper edge of the lower knife 8 see figs 2, and 8-Fig: 9 is
a modification of above wherein three knives 7. 8 and 9 are employed in connection
with the draw bars 1. 2. 3. 4. The knives 7 and 9 are connected by link 10
operated by one needle 11 the knife 8 being operated by needle 12.
If a shaft is required to be lifted for one pick and to remain for a second pick
both knives 7 and 8 must be up for example if knives 7 and 8 are lifted the
notches a and c will engage with draw bars 1 and 3 so drawing the said knives
outward, the draw bar returns leaving the knives but if a shaft is required to be
lifted for one pick only and to be dropped for the succeeding pick then one knife
must be up and the other down for example if knife 7 is lifted and knife 8 dropped
then the notch a of knife 7 is in position for draw bar 1 and the notch d of knife 8
is in position for draw bar 4 consequently the knives are drawn forward by a
catch a and at the next stroke are returned by the catch d. When a shaft has to
be dropped for one pick and to remain down for a second pick, both the knives 7
and 8 must be down but when a shaft has to be dropped for one pick and lifted
for the succeeding pick, then one knife must be down and the other up. From above
it will be seen that by this arrangement of knives and draw bars only one
indication is requisite for two picks that is there is no indication for each separate
pick so enabling machine to be worked at increased speed-The knives 7 and 8
are operated and put into position for the draw bars 1. 2. 3. 4 by means of pegs or
lags (if blank) 16, and the heavy ended lever 17 moving on its fulcrum 18 acting
through its end 19 upon the under side of each of the tumbler levers 20 on which
the lower ends of needles 13. 14 for operating the knives 7. 8 rest the ends 21 of
the levers 20 are held by weighted catches 22 in the position indicated by the last
lag or peg (as the movement of the rocking arm 23 turns the cylinder 15 every
alternate pick only) at 19ª are two cranked pusher bars which at each forward
movement of the bracket 5. 6 pushes back the holding bars 19' the latter press

page_text: back all the heavy ended levers 22 clear of the points 21 of the tumbler lever 20
meanwhile the same forward movement has by the catch 192 and catch wheel 193
turned the cylinder 15 and its peg or blank has indicated or set the lever 17 as
required by the pattern and the tumbler levers 20 being thus set free as described
the ends 19 of the lever 17 set the levers 20 and by the needles 13. 14 set the
knives 7. 8 in position as indicated by pegs or lags.
On the return movement of the rocking lever 23 the bracket 5. 6 are likewise
withdrawn and the support of the pusher bar 19 being thus removed permits the
weighted levers 22 to return the holding bar 19% along its slot, the upper ends of
the lever 22 now lock the tumbler lever 20 in the position to which it had been
set by the lever 17. If the lever 20 is in the highest position it is locked by the
incline 19 if in the lower position then it is locked by the notch 195 see fig: 2
being thus held until the next indication that is to say for two picks or instead of
the lever 17 acting upon tumbler lever 20 a blade spring 20* (fig: 1°) is attached
to the tumbler lever 20 and the cylinder 15 is placed thereunder the point 21 of
lever 20 is locked by the upright spring catch 22 (the equivalent of the weighted
lever 22) the latter being operated by cross bars 19" as heretofore described-For
levelling the healds and warp the cam slides 9 which operate and lock the jack
lever 10 work upon and along cross guide bars 22 carried by T slide 23 (one of
the latter on each side of a supporting frame 24) to one of the T slides is attached
a hand slotted lever 25* by means of which the cross bars 22 and cam slides 9 are
raised or lifted thereby permitting any raised jack levers to descend to the central
position whilst the lowered jack levers 10 are lifted' to the central position by
means of a cross rod or bar 25 so that the whole are brought into a central position
and the warp is thus levelled.
In the improved lag and peg 26-27 the pegs are of metal and have formed on
one end thereof a head or button 28 which is received in counter sunk portion of
hole 29 through the lag 26, the peg 27 being put in and through lag from the back
thereof and when all the pegs are so inserted a blade spring 30 or other covering
secures the pegs in position The covering 30 may be removed at pleasure by
springing its end clear of the pin 31 and then turning it aside on its pin 32 and
the pegs changed to other holes for other pattern.
The defect of wooden pegs either by "drying" in or other cause falling out and
so disarranging the pattern is avoided and remedied.
In the weaving of gauze or cross weaving we employ a cam slide A so formed in
the plate B (working in guides b) or the cam surface may be formed along the
lower edge of plate B and acting upon a runner in the jack lever C and depress and
lock the latter at its lowest position only-that is to say when the shed is down
thereby dispensing with the weights and springs for holding the healds in such
lower position.
Having thus fully described the nature and particulars of this our said Inven-
tion together with the manner in which the same is to be or may be performed or
carried into practical effect we would have it understood that what we claim as our
invention is
Firstly The combination of the knives 7. 8 and draw bars 1. 2. 3. 4 constructed
and as operating in manner and for purpose herein described and illustrated by the
drawings.
Secondly-The modification of the above apparatus as illustrated by fig: 9 and
herein described.
Thirdly The combination of bar Z weighted catch lever 22, tumbler lever 20,
weighted lever 17 operated by card or peg mechanism for the purpose and as
illustrated.
Fourthly The modification of above illustrated by fig 1* and as described.
Fifthly The combination of a T slide 23 guide bars 22 by means of which the
slides 9 are raised out of contact with jack levers 10 permitting levelling of the
bealds as herein described

page_text: Sixthly The combination of lag 26. peg 27 and holding and releasing spring 32
as described and illustrated:
Lastly-The construction and combination of the cam slide plate B, jack lever C
operating the latter so as to lock the healds in manner and for purpose herein
described.
In witness whereof I the said John Leeming for and on behalf of myself and
the said Frank Leeming and Robert Wilkinson, have hereunto set my hand
and seal this eleventh day of September in the year of our Lord one
thousand eight hundred and eighty two.
Witness
HERBERT TURNER
Clerk to Walter Brierley
Patent Agent
Halifax and Blackburn.
JOHN LEEMING. (L.S)