Improvements in Loom Shuttle-box, Heald Operating and Driving Mechanisms.
Year: 1893

page_text: Date of Application, 6th Dec., 1893
Complete Specification Left, 6th Sept., 1894-Accepted, 6th Oct., 1894
Improvements in Loom Shuttle-box, Heald Operating and Driving
Mechanisms.
We, WILLIAM ARTHUR CRABTREE and DAVID CRABTREE both of Windhill,
Shipley in the County of York, Machine Makers, do hereby declare the nature of
this invention to be as follows:-
With respect to shuttle box operating mechanism our invention has reference to
the class known as rising or drop box motions and consists of an arrangement and
combination of means whereby one series of pegs or risers are enabled to control or
regulate the movements of one set or portion of the box operating mechanism
thereby causing same to elevate or depress the shuttle-boxes as may be desired.
In carrying out our said invention we make use of cam or toothed segment and
crank wheel mechanism that is put into operation by being coupled with a rotary
shaft as hereinafter described.
When cams are used for operating one or other of the well known arrangements
of box levers, we mount on each of these cams, a key-lever which is formed so that,
when free, it may be forced by a spring into gear with a key-groove formed in the
rotary shaft upon which it is mounted. To this key-lever we couple another
operating lever which has its arm formed (as has the key-lever) for being moved
by the arm of a lever under the control of the pattern surface, and this latter lever
we mount on the opposite side of the cam to that on which the key-lever is mounted,
by which means and by arranging the arms of the lever moved by the pattern
surface (one of these arms being on one side the cam and the other on the other side
thereof) to be in such relative positions that when one of them is in position for
operating the key-lever the other is out of position for operating its lever which
would in turn have operated this said key-lever, one peg or riser in the pattern
chain will at any time operate both these lever arms and will consequently put the
cams into motion or will arrest such motion as the case may be, while when the
process known as "lagging-back" has to be effected, the risk of disarrangement of
the pattern surface with the box' operating mechanism, is avoided.
When toothed-segment-wheels are employed the key-lever and its other operating
lever are mounted thereon in the same manner as they are on the cam above
described, and these toothed-segments are further geared with partly toothed crank
wheels coupled to the box levers in the well known manner.
As regards the heald operating mechanism, our invention relates to that class of
machines wherein one series of levers mounted on another series and operated by
draw-bars, effects the movements of the healds, and our said invention consists of
the employment of coupling pieces or connecting rods which we attach to the latter
series and make to slide in suitable framework so that the former series may be
mounted thereon.
By this arrangement, of paris the centres of motion of the series of levers operated
by the draw-bars are made to move more nearly in a straight line and not as at present
in the segment of a circle the centre of which is the centre of motion of the series of
levers upon which the former were mounted.
These connecting rods we preferably make out of sheet metal by the process of
stamping or pressing. One of such pieces of sheet metal being mounted on one
side of each of said levers while another is mounted on the other, central and
appropriate joining pieces being placed between the two to which and to each other
they are rivetted or otherwise fixed.

page_text: With respect to the driving mechanism our invention relates to an improved
formation and construction of pulley and friction clutch, that is specially applicable
for use in the driving of looms.
In accordance with our invention we form a lateral flange upon the driving
pulley which runs loosely upon the shaft.
Encircling this flange is a metal strap having lateral projections formed on it to
extend through an opening made in a plate or disc keyed or otherwise rigidly fixed
upon the shaft in juxta-position with the driving pulley.
On this disc are mounted two levers, one arm of each of which is in contact with
one or other of the projections from the metal strap, while their other arms reach
into position to be operated by a wedge or inclined piece which is mounted to slide
upon the driving shaft or upon a sleeve or boss formed on the disc.
When this wedge is moved by the operative so as to act upon the levers, these
levers press the projections on the strap towards each other so that this strap is
thus made to lay firmly hold of the flange on the pulley by which it is then moved
carrying with it the disc and consequently the shaft upon which the latter is
mounted.
On the wedge being withdrawn, a spring mounted between the two loose ends of
the strap forces said ends apart and so the strap is clear of the flange, while the
levers are caused to recede and so follow and remain in contact with the wedge.
By this arrangement of friction clutch, a secure coupling is formed notwith-
standing any stray lubricant finding its way upon the coupling surfaces, neither do
these surfaces suffer from deterioration as do those where one such surface is of
leather.
Doted this 5th day of Danambar 1802
W. A. CRABTREE,
D. GRABTREE,
Per Samuel Hey,
Agent.
COMPLETE SPECIFICATION.
Improvements in Loom Shuttle-box, Heald Operating and Driving
Mechanisms.
We, WILLIAM ARTHUR CRABTREE and DAVID CRABTREE both of Windhill,
Shipley in the County of York, Machine Makers, 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 :-
With respect to shuttle-box operating mechanism our invention has reference
to the class known as rising or drop-box motions and consists of an arrangement
and combination of means whereby one series of pegs or risers are enabled to
control or regulate the movements of one set or portion of the box operating
mechanism thereby causing same to elevate or depress the shuttle-boxes as may be
desired.
As to the heald operating mechanism our invention relates to that class of
machines wherein one series of levers mounted on another series and operated by
draw-bars effects the movements of the healds, and our said invention consists of
the employment of coupling pieces or connecting rods which we attach to the
latter series and make them to slide in suitable framework so that the former series
may be mounted thereon.
As regards the driving mechanism our invention relates to an improved
formation and construction of pulley and friction-clutch that is specially applicable
for use in the driving of looms.
In the accompanying sheets of drawings illustrative of our invention;-
Fig. 1 is end elevation of a sufficient portion of a loom to show the application

page_text: of our improved box-operating mechanism. A shaft and revolving sleeve are
shown in section, so that certain of the parts may be more clearly scen.
Fig. 2 is illustrative of a view of the parts shown by Fig. I but as seen from
above.
Fig. 3 is a drawing in detail showing a modification hereinafter described.
Figs. 4 and 5 are illustrative of parts drawn to an enlarged scale.
Figs. 6 and 7 are side elevations of the operating parts in the heald operating
mechanism showing the relative positions of the several parts when the heald, to
which they are attached is in its lowest and highest positions respectively. The
framework in each case being omitted for the sake of clearness.
Figs. 8 and 9 are end and top views of a portion of a loom showing the application
of our improved driving mechanism.
Figs. 10, 11 and 12 are respectively front and sectional side and front elevations
of a pulley and friction clutch made in accordance with our invention.
.
Similar letters and figures of reference indicate similar parts throughout the
several views.
A indicates the end frame of the loom.
In carrying out the first part of our invention we make use of cam or toothed
seginent and crank wheel mechanism that is put into operation by being coupled,
with a wheel a having a boss or sleeve such wheel a deriving its rotary motion
through the wheel c from the shaft d which is one of the loom's prime motor
shafts.
When cams e el are used for operating one or other of the well known
arrangements of box levers (such as those at ƒ and g which are coupled by the
rods and chain in the usual manner to the shuttle boxes m) we mount on each
of these cams e and e', a key-lever n which is formed so that, when free, it may
be forced by a spring o into gear with one or other of the key-grooves b¹ formed
in the sleeve b of the wheel a which revolves loosely upon its bearing shaft a'.
To this key-lever n we couple by the rod n² another operating lever n¹ which has
its arm formed (as has also the key lever n) for being moved by the arm of a
lever which is under the control of the pattern surface by being coupled with
the rod to the lever operated by said pattern surface (which is herein
shown as consisting of lags and pegs although the one consisting of metal cam
pieces formed in the well known manner might under certain conditions be
employed with equal advantages) and this latter lever n' we mount on the
opposite side of its cam e or el to that on which the key-lever is mounted, by
which meaus and by arranging the arms pl p² of the lever p, shown in detail Fig. 15,
(one of these being on one side of the cam while the other is on the other side
thereof) to be in such relative positions that when one of them as the arm p² is
in position for operating the key-lever n the other arm pl is out of position for
operating the lever n', on the other hand when the lever p² is out of position for
operating the lever n then the lever p' is in position for operating the lever n'
which through the link n still operates the key-lever n thus the pegs or risers
and blanks of the pattern surface have a distinct and constant meaning a peg or
riser carrying the cam into one position and a continuation of said peg or riser
keeping it in such said position while the same effect in the other direction is
produced by the blank, by which means when the process known as "lagging
back" has to be effected, the risk of disarrangement of the pattern surface with the
box operating mechanism is avoided.
When toothed-segments are employed, the key-lever and the lever a¹ are
mounted thereon in the same manner as they are on the cam e above described,
and these segments are further geared with partly toothed crank wheels e
coupled to the box levers (f and y) in the well known manner.
Respecting the second part of our invention which relates to heald operating
mechanism in which a series of levers s are usually mounted upon another series
of levers, and in accordance with this part of our invention we make use of a
series of coupling pieces or connecting rods for joining or coupling the said

page_text: series of levers s to the series of levers s¹, these coupling pieces t being made
to slide in the framework or fixed guiding pieces to retain or maintain same in
position.
By this arrangement of parts the centres of motion s² of the levers s (which
are operated by the draw bars and through the medium of their catches s
and in the well known manner) are made to move more nearly in a straight line
and not as at present in the segment of a circle, the centre of which is the centre
of motion of the series of levers upon which these levers s have formerly been
mounted.
These coupling pieces t we preferably make out of sheet metal by the process
of stamping or pressing. One of such pieces of sheet metal being mounted on
one side of each of said levers s and s¹ (see detail drawing Fig. 13) while another
is mounted on the other, central pieces t't being placed between the two to which
and to each other they are rivetted or otherwise fixed.
In accordance with the next part of our invention which relates to the driving.
mechanism we form a lateral flange upon the driving pulley which runs loosely
upon the shaft d' or upon a bush or sleeve 2 mounted on said shaft d.
Encircling this flange v is a metal strap w having lateral projections w
and w formed on it to extend through an opening made in a plate or disc
keyed or otherwise rigidly fixed upon the shaft d in juxtaposition with the driving
pulley
On this disc are mounted two levers y y¹ pivoted at y², one arm of each of
which is in contact with one or other of the projections and wo² while their
other arms reach into position to be operated by a wedge or incline piece & see
Fig. 14 which is mounted so as to slide upon the driving shaft d or upon a hub a¹
formed on the disc.
-
When the operative moves the handle so as to operate the wedge, through
the medium of the lever rod 3 and lever 2, in order to cause it to act upon the
levers y y', these levers press the projections to towards each other so that their
strap w is thus made to lay firmly hold of or grip the flange on the pulley by
which it is then moved carrying with it the disc and consequently the shaft d
upon which this disc r is fixed.
On the wedge being withdrawn, a spring a mounted between the two loose
ends of the strap w forces said cuds apart and so the strap w is clear of the
flange e', while the levers y y' are caused to recede and so follow and remain in
contact with the wedge z.
By following this arrangement in the production of a friction clutch, a secure
coupling is formed notwithstanding any stray lubricant finding its way upon the
coupling surfaces, neither do these surfaces suffer from deterioration as do those
where one such coupling or joining surface is of leather.
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 we
claim is ;-
1. The combination of cam, lever and grooved shaft or sleeve mechanism
substantially as herein specified.
2. In box operating mechanism, the combination of a rotary shaft or sleeve in
which are made key-grooves, key and other lever mechanism mounted on cams or
toothed segments taking over said shaft or sleeve, and means for operating said
key or other lever for causing same to engage with or be disengaged from one or
other of said key-grooves substantially as herein specified.
3. In heald operating mechanism of the class described the combination of a
series of coupling pieces or links for joining one series of levers to the other
means for supporting said coupling pieces and the said other series of levers
substantially as and for the purposes set forth.
4. The combination of a driving pulley having a supplementary flange as
described, a metal strap for contact with said flange and otherwise formed as shown

page_text: a disc arranged-and formed to be mounted in proximity with said pulley and strap,
levers mounted on said dise and a wedge for operating said levers substantially as
set forth.
Dated this 5th day of September 1894.
WILLIAM A. CRABTREE,
DAVID CRABTREE,
Per Samuel Hey,
Agent.