Improvements in or appertaining to the Pattern Mechanism or "Head Motion" of Looms for Weaving.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or appertaining to the Pattern Mechanism or
"Head Motion" of Looms for Weaving.
We, EDWARD HOLLINGWORTH, of Dobcross Loom Works, Dobcross, in the
County of York, Power Loom Maker, and BEN BRIERLEY, of the same place,
Foreman, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements, more especially adapted for the Hol-
lingworth and Knowles loom, for actuating the harness and box mechanism, or
head motion and holding the parts in given positions and inoperative when and
so long as no change is called for by the peg cylinder or pattern chain, the object
of our invention being, primarily to considerably relieve the loom by changing
the boxes and each individual harness or shaft only as they are called instead of
at each revolution of the loom as is the case at present.
For the purpose of our invention we prefer to employ a peg cylinder driven
intermittently by peg and star wheel or similar means, but a pattern chain
can, if desired, be used in lieu thereof with equal advantage.
We mount on a fixed shaft or pivot, a number of selector levers or fingers, one
to each of the ordinary vibrator levers of the head motion, these said selector
levers extending over the peg or pattern cylinder in alignment with their respec-
tive vibrator levers and being raised according to selection by the pegs or bowls
presented by the pattern cylinder. To the inside of each vibrator we hinge or
pivot a retaining lever, the tail of which extends over and is adapted to be engaged
by the end of its corresponding selector lever. The front end of the retaining
lever normally rests against a fixed cross bar and at the foot thereof is a recess or
step which, when the vibrator lever is raised to a given position as afterwards
described, will slip over and engage with the upper edge of such fixed cross bar
and hold the parts in their elevated positions until a change is called for by the
pattern being woven. On the shaft of the bottom gear of the head motion we
mount a cam or cams which give a rising and falling motion to a frame mounted
on a fixed shaft or centre and provided with a transverse bar or rail which occupies.
a position a little to one side of the centres on which the retaining levers are
hung and immediately under the feet of same. The said frame has a constant
motion, the transverse bar in same, at each upward movement, engaging with
the hinged retaining levers to be elevated, as selected and raising them, and also
the vibrators to which they are connected, the distance required, which places
the notches or steps at the feet of the retaining levers clear of the fixed cross bar
whereupon, in consequence of the pressure of the rising and falling transverse bar
being applied at one side of the centres of the hinged retaining levers, they are
constrained to move about their pivots to the same side and bring the notches or
steps into engagement with the upper edge of the fixed cross bar. The feet of
the retaining levers and the engaging surface of the transverse bar on the rising
and falling frame, are slightly inclined to assist in moving the levers into engage-
ment with the fixed cross bar.

page_text: In all cases where no peg or bowl is presented under the selector levers, the
elevated retaining levers together with their vibrator levers, are thus locked or
held in their elevated positions until a change is called for by the pattern cylinder,
whereby the power heretofore expended in changing the harness, and 'boxes at
each revolution of the loom, whether required or not, is saved and wear and tear
considerably reduced. The selector levers are actuated by the pegs on the peg
cylinder and, when elevated, they engage with the ends of the retaining levers
and move them on their centres in such manner as to withdraw them from engage-
ment with the fixed cross bar or hold them clear of the rising and falling transverse
bar so that they shall not be raised at its next upward movement.
Dated this 29th day of November 1897.
TASKER & CROSSLEY,
Halifax, Patent Agents.
Improvements in or appertaining to the Pattern Mechanism or
Head Motion" of Looms for Weaving.
[
We, EDWARD HOLLINGWORTH, of Dobcross Loom Works, Dobcross, in the
County of York, Power Loom Maker, and BEN BRIERLEY, of the same place,
Foreman, 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 relates to improvements more especially adapted for the Holling-
worth and Knowles' Loom, for actuating the harness and box mechanism or head
motion and holding the parts in given positions and inoperative when and so long
as no change is called for by the peg cylinder or pattern chain.
The primary object of our invention is to lock the vibrator levers and gear
when elevated to their highest positions and hold them in such positions and
inoperative so long, as no change is called for by the pattern chain whereby wear
and tear are reduced and the loom relieved to the extent that the elevation of the
vibrator levers and gear,. with. the individual harness or boxes, every time a bowl
or peg is presented, will be avoided.
•
For the purpose of our invention we prefer to employ a peg cylinder driven
intermittently by peg and star wheel or similar means, but a pattern chain can,
if desired be used instead thereof with equal advantage...
We mount on, a fixed shaft or pivot, a number of selector levers or fingers, one
to each of the ordinary vibrator levers of the head motion, these said selector levers
extending over the peg or pattern cylinder in alignment with their respective
vibrator levers and being raised according to selection by the pegs or bowls pre-
sented by the pattern cylinder. To the inside of each vibrator we hinge or pivot
a retaining or locking lever, the tail of which extends over and is adapted to be
engaged by the end of its corresponding selector lever. The front ends of the
retaining or locking levers, when in their lowest position rest against a fixed cross
bar and at the foot of each said lever is a recess or step which when the vibrator
lever is raised to a given position as afterwards described, will slip over and
engage with the upper edge of such fixed cross bar and hold the parts in their
elevated positions until a change is called for by the pattern being woven.
shaft of the bottom gear of the head motion we mount a cam or cams which give a
rising and falling motion to a frame mounted on a fixed shaft or centre and pro-
On the

page_text: vided with a transverse bar or rail which occupies a position a little to one side of
the centres on which the retaining levers are hung and immediately under the
feet of same.
The said frame has a constant motion, the transverse bar in same,
at each upward movement, engaging with the hinged retaining levers to be
elevated, and raising them, and also the vibrators to which they are connected,
the distance required, which places the notches or steps at the feet of the retain-
ing levers clear of the fixed crossbar whereupon, in, consequence of the pressure
of the rising and falling transverse bar being applied at one side of the centres
of the hinged retaining levers, they are constrained to move about their pivots to
the same side and bring the notches or steps into engagement with the upper
edge of the fixed cross bar.
The feet of the retaining levers and the engaging surface of the transverse bar
on the rising and falling frame, are slightly inclined to assist in moving the levers
into engagement with the fixed cross bar.
In all cases where no peg or bowl is present under the selector levers, the
elevated retaining levers together with their vibrator levers, are thus locked or
held in their elevated positions until a change is called for by the pattern
cylinder, thereby considerably reducing wear and tear and relieving the loom.
The selector levers are actuated by the pegs on the peg cylinder and, when elevated,
they engage with the ends of the retaining levers and move them on their centres
in such manner as to withdraw them from engagement with the fixed cross bar
and allow them to descend, or, if in their lowest position, hold them clear of the
rising and falling transverse bar so that they shall not be raised at its next upward
movement.
In order that our said invention may be fully understood reference is hereafter
had to the annexed drawings forming a part of this specification, in which
Fig. 1 is side elevation partly in section of so much of the head motion of the
Hollingworth and Knowles loom as is essential to shew the application of our
improvements, the framework being omitted to shew the parts more clearly.
Fig. 2 is a similar elevation to Fig. 1, shewing the retaining or locking levers
and vibrator gear in their elevated positions.
Referring to the drawings letter a represents the bottom chilled gear, a¹ the
top chilled gear, b the vibrator gear wheel, and c the vibrator lover pivoted on
stud and carrying said vibrator gear wheel. d represents the peg cylinder
mounted on shaft d', d² the peg lags and the pegs mounted in or secured thereto.
The cylinder d is driven intermittently as usual by peg and star wheel (not shewn)
all the above parts being arranged and acting in the ordinary and well known
manner.
A pattern chain, having metal bowls secured in position on cross spindles by
means of tubes or bushes, and more commonly employed in the class of head
motion shewn on the drawings, may be substituted for the peg cylinder and will
act equally as well. Above the peg cylinder d and extending at right angles over
same are arranged a number of selector levers or fingers e, one to each vibrator c
and in alignment therewith. These levers are mounted on a fixed shaft el upon
which they are free to turn, and they are raised individually when called upon
according to selection of the pattern by the pegs presented under said levers
by the peg cylinder d. Within the forked or slotted ends of the vibrator levers c
wherein the vibrator gear wheels are located, are hinged or pivoted retaining or
locking levers ƒ having extensions or arms f¹ at right angles thereto which extend
over and are adapted to be engaged by the ends of their respective selector levers e.
The front ends of said locking levers when the vibrator gears bare in gear with the
bottom chilled gears a rest against a fixed cross bar g (as shewn in Fig. 1) secured
to the framework, and near the foot of each lever f there is a shoulder or stop f
which when the levers are raised as afterwards described, will slip upon and
engage with the upper edge of the cross bar 9 (as shewn in Fig. 2) and thereby
hold the vibrator levers and gears in their elevated position until a change is
called for by the pattern being woven.

page_text: On each end of the shaft a² of the bottom gear a of the head motion is mounted
a cam h with which engages a bowl k carried at the end of a frame k mounted
on a fixed cross shaft journalled in bearings in the framework and provided
with a transverse bar or rail which occupies a position a little to the right of the
centres A on which the retaining or locking levers f are hung and immediately
under the feet of same, the said frame receiving a constant rising and
falling motion from the cams h. At each upward movement of the frame k the
transverse bar 3 engages with these hinged retaining or locking levers f, which
are to be elevated according to the selection of the pattern surface, and raises
the said levers f with their vibrator levers and gears to the full extent. As the
pressure of the crossbar is exerted upon the levers f at a short distance to the
right hand of their centres, it will be obvious that when the shoulders or steps f
pass clear of the fixed bar g said levers will be made to made to move about their
centres to the same side whereby when the frame & descends again to its lowest posi-
tion, the shoulders or steps f will engage with the upper edge of the fixed bar
and be held thereby causing vibrator wheel b to be in contact with the top chilled
gear a
So long as no peg or bowl is presented under the selector levers e, the said
locking levers together with their vibrator levers and gears are thus locked
or held in the position shewn in Fig. 2, and inoperative until a change is called
for by the pattern cylinder which may be at the next revolution or after several
revolutions of the loom, whereby the loom is relieved, and wear and tear con-
siderably reduced.
The selector levers e are actuated by the pegs d³ on the peg or pattern
cylinder d and when elevated thereby they engage with the ends f¹ of the retain-
ing or locking levers and move them on their centres so as to withdraw them
from engagement with the fixed cross bar g to allow them to descend (as shewn
in dotted lines in Fig. 2) or hold them clear of the transverse bar on the rising
and falling frame as shewn in dotted line in Fig. 1, so that they shall not be
raised at its next upward movement.
The feet of the retaining levers f and the engaging surface of the transverse
bar are slightly inclined as shewn to assist in moving the levers into engage-
ment with the fixed cross bar.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
In dobbies or head motions of looms for weaving, the combination with a peg
cylinder or pattern chain and vibrator levers and gears of selectors levers e, one to
each vibrator together with retaining or locking levers such as f, an oscillating
frame provided with transverse bar, a cam or cams h for actuating said frame
and a fixed cross bar or rail g all arranged, operated and operating in the manner
and for the purposes substantially as herein shewn and described.
Dated this 16th day of April 1898.