Improvements in Letting Off Motions for Looms for Weaving.
Year: 1894

page_text: Date of Appl.cation, 17th Mar., 139
Complete Specification Left, 17th Dec., 1894-Accepted, 19th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Letting Off Motions for Looms for Weaving.
We SAMUEL SPENCER, of Victoria Engineering Works, Whitefield, Engineer,
and JAMES CHAMBERS, of 31, Edward Street, Bury, Machinist, both in the County
of Lancaster, do hereby declare the nature of this invention to be as follows:-
This invention has for its object an improved letting off motion for looms for
weaving.
According to this invention we fix to one end of the warp beam a worm wheel
into which is geared a worm fixed on a shaft which runs along the loom side to the
front of the loom, on the other end of which shaft is fixed a ratchet wheel also
a Llever working loose on the said shaft furnished with a pawl which works into
the said ratchet wheel. The said lever receives its motion through a connecting
link which is coupled to an arm projecting from a rocking shaft, thus giving motion
to the said worm shaft and winding off the warp from the beam. The said lever
is also furnished with a spring bolt or bar which when the said L lever is drawn
down catches underneath a slide which runs to the back of the loom, and has a
wedge, incline, eccentric or cam at the other end which rests on the bracket that
carries the worm shaft end. The said bracket is provided with a snug on which a
feeler or slide can work from the vibrator as it oscillates backwards and forwards
and as the warp comes from the beam it is passed over a shaft at the extreme end
of which is fixed a lever from which a weight is suspended, the said shaft at given
points being also furnished with levers, one arm of which stands perpendicular
and the other being horizontal. In the end of the perpendicular arms is carried a
second shaft which presses against the warp and attached to one of the horizontal
arms is the said feeler having a slot at the bottom end which slot slides on the snug
provided on the said worm shaft bracket. The weight being suspended from the
lever fixed on the end of the first named shaft causes the seconil shaft to press
against and give tension to the warp which latter causes the second shaft to move
forward and backwards as it is let off and used up. The said feeler is provided
with a projection underneath which the said wedge, incline, eccentric or cain passes
and as the feeler is raised by the warp the wedge, incline, eccentric or cam advances
and filling up the space prevents the vibrator moving forward and thus undue strain
upon the warp and healds.
When the said wedge, incline, eccentric or cam has advanced a certain distance
so as to allow the spring bolt or bar to leave the end of the slide in front of the
loom, the lever by means of a spring is caused to rise and the said catch to
adjust itself in the catch wheel for a further supply of warp, at the same time
putting into position a tumbler which is fixed on the top of the slide, so as to come
in contact with a projection on the slay sword and as the said slay sword is
advancing to draw back the said wedge, incline, eccentric or cam and thus allow
the feeler to fall and a fresh supply of warp to come from the beam. As the slay
retires or returns the tumbler falls into its normal position again and allows the
said wedge, incline, eccentric or cam to readjust itself. By a repetition of the
operation the warp is kept at one uniform tension from top to bottom of the beam.
Dated this 16th day of March 1894.
F. BOSSHARDT & Co.,
Agents to Applicants.

page_text: improvem
We, SAMUEL SPENCER, of Victoria Engineering Works, Whitefield, Engineer,
and JAMES CHAMBERS, of 31, Edward Street, Bury, Machinist, both in the County
ol Lancaster, 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 has for its object an improved letting off motion for looms for
weaving.
And in order that our invention may be more fully understood we have caused
to be appended hereunto two sheets of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1, Sheet I, is a sectional side view, Fig. 2 a plan, Fig. 3 a sectional end
view and Fig. 4 a front view of our improved letting off motion for looms.
Figs. 5, 6, & 7 are detached views of modifications of the vibrator locking
arrangement.
Fig. 8, Sheet II, is a sectional side view, Fig. 9 a plan, Fig. 10 a back view and
Fig. 11 a front view of some further modifications of our improved letting off motion
for looms.
In carrying out our invention and referring to Sheet I, we fix to one end of the
warp beam a a worm wheel b into which is geared a worm c fixed on a shaft d which
runs along the loom side e to the front of the loom, on the other end of which
shaft d is fixed a ratchet wheel falso an L lever g working loose on the shaft d
furnished with a pawl h which works into the ratchet wheelf. The lever g
receives its motion through a connecting link i which is coupled to an arm k pro-
jecting from a rocking shaft thus giving motion to the worm shaft d and letting
off the warp from the beam a. The lever g is also furnished with a spring_bolt
or bar which when the L lever g is drawn down catches underneath the front
end of a slide m guided in the bracket n the back of which slide has a wedge or
incline m¹, see Figs. 1, 2, 3, & 4, which rests on a snug o on the bracket of that
carries the end of the worm shaft d. On the snug o is adapted to slide a feeler p
operated from the vibrator
7. As the latter oscillates backwards and forwards and
as the warp a¹ comes from the beam a it is passed over the shaft r at the extreme
end of which is fixed a lever r¹ from which a weight is suspended, the shaft rat
given points being also furnished with ☐ levers s, s', one arms of which stands
perpendicular and the others s being horizontal. The ends of the perpendicular
arms carry the vibrator q which being under the influence of the weight presses
against and exerts tension upon the warp a' and which is caused to move backwards
and forwards as the warp is let off and used up. Attached to one of the horizontal
arms is the feeler p having a slot p' at the bottom end, which slot slides on the snug o.
The feeler pis provided with a projection underneath which the wedge or
incline m¹ passes and as the feeler p is raised in weaving light goods through
the opening of the shed and in heavy goods through the beating up of the weft, the
wedge or incline m¹ advances and fills up the space between the feeler p and the
snug o, which locks the vibrator q in position and prevents it moving forward and
thus exert undue strain upon the warp a' and healds. When the wedge or incline m'
bas advanced a certain distance through the using up of the warp a¹, which creates
the space aforesaid the spring bolt g' is allowed to leave the end of the slide m in
front of the loom and the Llever g by means of a spring g' is caused to partially
rotate or rise and the catch to adjust itself in the catch wheel for a further
supply of warp. At the same time a tumbler t, carried on the top of the slide m,
is put in position so as to come in contact with a projection u on the slay sword u'
when the latter is advancing and draw back the wedge or incline m' thus allowing

page_text: the feeler p to fall as a fresh supply of warp a¹ comes from the beam a. As the
elay retires or returns the tumbler t falls into its normal position again and allowa
the said wedge or incline m' to re-adjust itself. By a repetition of the operation the
warp is kept at one uniform tension from top to bottom of the beam.
In lieu of the wedge or incline m' on the back end of the slide m, the same result
may be obtained by an eccentric or cam m', see Figs. 5 & 6, having a spur pinion m³
to partially rotate on a stud m³ carried by the worm wheel bracket o¹, the eccentric
or cam m being adapted to bear against the projection p³ on the feeler p and the
pinion m³ to gear into a rack m formed on the back end of the slide m. Fig. 7
shows another arrangement for the same purpose i.e. for locking the feeler p vertically
in position and consists of a worm m having also a spur pinion m³, adapted
partially rotate on the bracket o' the worm m' engaging a projection or tooth p² on
the feeler p and the pinion m² gearing with a rack m formed on the side at the
back end of the slide m.
to
According to the modification shown on Sheet II, we fulcrum to the end of the
horizontal arm of the lever g a draw hook or tumble levert the lower end of
which is formed with a hook t¹ and its upper end curved in an horizontal direction.
To the said lever arm is also connected a link w the bottom end of which fits
loose on a stud w¹ attached to the horizontal arm of a second L lever r carried by
a stud fixed in a bracket .' which is bolted to the loom side. To the top end of
the perpendicular arm of this second lever x is attached a slide m furnished with
a rod m which runs to the back of the loom and is attached to the perpendicular
arm of a third lever y. The slide part m runs to the front of the loom and is
furnished with an angle plate me, above which is a lever y¹ in an horizontal position
working loose on a stud fixed to the loom side. The horizontal arm of which lever
carries a small trigger or latch y one end of which rests on the top of the angle
plate m®.
The other arm of the lever y¹ is curved and carries at its end an adjustable
study for the purpose of putting the lever y into position again. To the outer
end of the horizontal arm of the third lever y is connected a vertical feeler p
formed at its upper end with a wedge or incline, m' which slides between a small
flanged pulley z and the vibrator q, the flanged pulley and vibrator 7 being
carried by a bracket e¹ bolted to a cross rail e which holds the loom sides together.
At one end of the vibrator q is fixed a lever from which a weight r³ is suspended
which gives tension to the warp a'. The latter is drawn from the warp beam a,
passed over the vibrator to the breast beam at the front of the loom and then
underneath onto the cloth beam. The operation of the modification described is as
follows:-
As the weft is beaten up when weaving heavy cloth and as the shed opens when
weaving light cloth, the vibrator q is caused to yield and thus create a space
between the vibrator q and flanged pulley z. This space is filled up by the wedge
or incline m¹ of the feeler p owing to it being raised, so as to lock the vibrator q in
position causing at the same time the lever y to draw the horizontal slide m
towards the back of the loom until the end of the small trigger or latch y* falls off
the end of the angle plate me. This allows the horizontal lever y¹ to fall upon the
upper or curved end of the tumbler lever t and increase its weight which causes it
to swing on the stud and place its hook t¹ underneath the path of the arm k
projecting from the bottom of the slay sword . The down motion of the arm k
then draws the tumbler levert and the latter oscillating the ☐ lever g its pawl
moves the catch wheel one tooth thus letting off a portion of the warp. The
link to then causes the vertical end of this second lever x to move forward, and
coming in contact with the adjustable stud y and through the medium of the lever y¹
places the end of the small trigger or latch y' in position again on the top of the
angle plate m. In the meantime the horizontal slide m draws the third lever y
and which raises the wedge or incline m' thus allowing the vibrator q to tension the
warp a' let off.
A repetition of the above operation keeps the warp supplied and the weighted
vibrator q the same at its proper tension during the letting off of the same, whilst the

page_text: wedge or incline m', or its equivalent, fills up the space between the pulley z and
vibrator g and prevents undue strain upon the warp a¹ during the operation of
changing of the bealds or beating up the weft.
The vibrator locking device described also controls the supply of warp the
amount of which may be altered by varying the number of teeth in the ratchet
wheel f.
We do not confine ourselves to the use of a wedge, incline, cam, eccentric or
worm as described to effect the locking of the vibrator q in the position in which it
has heen adjusted by the warp a' as the said locking may be performed by othe
or equivalent means without departing from the nature of this part of our invention,
that is the following up and locking in position of the vibrator q during the opening
of the shed and beating up of the weft for the purpose of freeing the warp of undue
strain which otherwise would be exerted thereon by the vibrator q.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, we declare that what we
claim, is-
"In letting off motions for looms for weaving."
1st. Locking the vibrator 9 in position during the opening of the shed or the
beating up of the weft, for the purpose of taking the strain off the warp, substantially
as set forth.
2nd. A vibrator q in combination with an incline, wedge, or other equivalent
locking device adapted to follow up and lock in position, either directly or indirectly,
the vibrator q during the opening of the shed and the beating up of the weft and
to release the same when letting off warp, all substantially as set forth.
3rd. The slide m in combination with a tumbler levert and suitable connections
between the same, adapted to effect the withdrawal of the slide m when a fresh
supply of warp is required, all substantially as set forth.
4th. The general combination and construction of parts and modifications thereof
constituting our improvements operating substantially as and for the purpose set
forth.
Dated this 15th day December 1894
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicants.