Improvements in Letting-off Motion for Looms for Weaving.
Year: 1890

page_text: Date of Application, 5th July, 1890
Complete Specification Left, 20th Dec., 1890-Accepted, 24th Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in Letting-off Motion for Looms for Weaving.
I, ARTHUR ANTROBUS, of Apprentice House, Styal, near Handforth, in the County
of Chester, Mill Joiner, do hereby, declare the nature of this invention to be as
follows:-
This invention relates to improvements in letting-off motions for looms for weaving
and has for its object to reduce the weight, wear and tear of the parts thereof, make
the same easier for manipulation and more effective so as to produce a more level fabric
than heretofore has been the case.
To this end my improvements consist in effecting the letting off of the warp by applying
lateral friction unto the ends of the warp beam or the flanges in lieu of exerting the
friction or pressure necessary, axially on the warp beam as heretofore has been the case.
This may be carried out in various ways.
According to one form of my invention I employ at each end of the warp beam
a lever which I suitably suspend from the loom side. To this lever I connect by
means of a screw spindle a bracket with semi-circular or similarly shaped arms,
which reach over and under the bearing of the warp beam. The free end of each
of the said arms is furnished with a segmental or other friction plate arranged to be
brought into contact with the side of the flange of the warp beam. On the s
rail below the warp beam is suitably mounted a lever having an adjustable weight
and being formed with a link, each end of which link, by means of a rod is connected
with the free end of the aforesaid suspended lever respectively. The weight on the
said lever causes the link to move and draw the suspended levers towards each other
so as to force and bring the segmental plates connected thereto in frictional contact
with the side of the warp beam flange and thus control the letting-off of the warp as
required.
According to another form of my invention I employ the said segmental or other
friction plates on a lever placed on the end or boss of the warp beam or its flange,
by forming the said lever somewhat hook shaped and with four arms, two of which
serve to hold the said segmental or other friction plates and the other two, to permit
of tieing the said levers together. The lower extremity of the said levers are connected
as hereinbefore described to a link and weighted lever by means of rods, while the
upper extremities receive a screwed rod, furnished at each end with a nut or wheel
which bears against the outside of the said levers and permit of increasing or decreasing
the adhesion between the segmental or other friction plates and the side of the warp
beam flange as may be required. On the loom side a stud is provided, which engages
the said lever so as to prevent it being rotated with the warp beam. The face of the
said segmental or other friction plates, if deemed necessary, I may cover with leather
or other such material which will increase its adhesion, and in order to ensure the
whole of the face thereof coming into contact with the warp beam flange I connect
the said plate to the respective lever, hinge or universal joint like.
Either of the two forms of my invention described may be used with a self-acting
weight device, i.e. the weight which otherwise requires moving by hand nearer to
the fulcrum of its lever, as the warp gets less in diameter on the beam, I effect in the
following manner:
In connection with the warp beam I employ a feeler, formed with two racks and
arranged to bear constantly against the warp by means of a weighted lever oscillating
on a stud and formed with a toothed segment, in gear with one of the said racks.
In gear with the second named racks of the said feeler I employ a pinion fixed on a
shaft on which turns loosely the link aforesaid. Another pinion is fixed onto the same
shaft in front of the first name pinion which is brought into gear with a rack, one.

page_text: end of which is arranged to slide in the upper extremity of the aforesaid link, while
the other end is permitted to ride on the lever connected with the said link and is
provided with a weight arranged adjustable thereon.
As the diameter of the warp decreases the said feeler by means of the weighted
segmental toothed lever is caused to rise and impart motion to the said pinions, which
cause the rack and consequently the weight thereon to be drawn nearer to the fulcrum
of its lever and link and thus reduce the pressure on the latter and segmental or other
friction plates.
Dated thin l 1
TI 1000
F. BOSSHARDT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements in Letting-off Motion for Looms for Weaving.
I, ARTHUR ANTROBUS, of Apprentice House, Styal, near Handforth, in the County
of Chester, Mill Joiner, 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:-
My invention relates to improvements in letting-off motion for looms for weaving
and has for its object to reduce the weight, wear and tear of the parts thereof, to
render the same easier for manipulation and more effective, so as to produce a more
level fabric than heretofore has been the case.
To this end my improvements consist in effecting the letting-off of the warp by
applying lateral friction unto the ends of the warp beam or the flanges in lieu of
exerting the friction or pressure necessary, axially on the warp beam as heretofore has
been the case.
This may be carried out in various ways.
And in order that my invention may be more fully understood I have caused to be
appended hereunto one sheet of drawings marked with letters of reference indicating
like parts in the various figures.
Figs. 1 & 3, are end views and Figs. 2 & 4, side views respectively of the back
ortion of the looms showing my improvements applied. Fig. 5 is a cross section of
Fig. 3.
According to one form of my invention and referring to Figs. 1 & 2, I employ at
each end of the warp beam a a lever b which I suitably suspend from the loom c al a¹.
To this lever I connect by means of a screw spindle d a bracket e with semi-circular
or similarly shaped arms e, which reach over and under the bearing c¹ of the warp
beam a and which bracket e is prevented from rotating by means of a finger e² bearing
against the same, and fixed to the cross rail h. The free end of each of the said
arms e¹ is furnished with a segmental or other friction plate hinged thereto and
arranged to be brought into contact with the side of the flange g of the warp beam a.
On the cross rail below the warp beam a is suitably mounted on the stud /¹ of the
bracket a lever i having an adjustable weight k and being formed with a link ¹,
each end of which, by means of a rod 1, is connected with the free end of the aforesaid
suspended lever 6 respectively. The weight k on the lever i causes the link to move
and draw the suspended levers 6 towards each other so as to force and bring the
segmental or other friction plates f connected thereto in frictional contact with the
side of the warp beam flange g and thus control the letting-off of the warp as
required.
According to another form of my invention and referring to Figs. 3, 4 & 5, I
employ the said segmental or other friction plates f on a lever 6 placed on the end or
boss of the warp beam a or its flange g, by forming the said lever b somewhat hook
shaped and with four arms, two of which b' serve to hold the said segmental or other
friction plates and the other two 62, 63, to permit of tieing the said levers 6 together.
The lower extremity or arm 62 of the said levers bare connected as hereinbefore

page_text: described to a link and weighted lever i by means of rods 7, while the upper
extremities or arms ³ receive a screwed rod m, formed at one end with a head m¹ and
furnished at the other end with a nut or internally threaded wheel m², which hears
against the outside of the said levers 6 and permits of increasing or decreasing the
adhesion between the segmental or other friction plates fand the side of the warp
beam flange gas may be required. The rod m and the levers 6 may be formed and
employed as shown in dotted lines Fig. 4, or as shown in full lines, in the latter case
the usual vibrator is dispensed with and the warp passed over the said rod m. On the
loom side a finger e² is provided which engages the said lever so as to prevent it
being rotated with the warp beam a. The free end of the said segmental or other
friction plates f, if deemed necessary, I may cover with leather or other material
which will increase its adhesion and in order to ensure the whole of the face thereof
coming into contact with the warp beam flange g I connect the said plate f to the
respective lever b, hinge or universal joint like.
Either of the two forms of my invention described, may be used without or with a
self adjusting weight device, i.e. the weight which otherwise requires moving by
hand towards the fulcrum of its lever i, as the warp gets less in diameter on the
beam, I effect in the following manner :-
In connection with the warp beam a, I employ a feeler 0, the upper end of which
if deemed necessary I may furnish with a pulley or roller and the lower end I form
with two racks o¹, 02. This feeler o is arranged to bear constantly against the warp
on the beam g by means of a weighted lever poscillating on a stud pl on a bracket p³
fixed to the cross rail and formed with a toothed segment p³, in gear with the rack o¹.
In gear with the second namet rack o² of the feeler o I employ a pinion q fixed on a
shaft on which turns loosely the link aforesaid, the shaft being mounted in a
bracket fixed to the cross rail h. A wheels is fixed onto the shaft in front of
the pinion g which is brought into gear with a rack g', one end of which is arranged
to slide in the upper extremity of the aforesaid link while the other end is permitted
to ride on the lever i connected with the link and is provided with a weight k
having an arm k¹ and additional weight arranged adjustable thereon.
As the diameter of the warp decreases the sail feeler o by means of the weighted
toothed segmental lever p is caused to rise and impart motion to the said pinion g and
wheels, which causes the rack q¹ and consequently the weights k, k² thereon to be
drawn towards the fulcrum h¹ of the lever i and link and thus reduce the pressure
laterally exerted by the segmental or other friction plates onto the warp beam
flange g.
In lieu of employing the link behind the wheels the same may be employed in
front thereof and thus bring the weights k, k² and rack q¹ nearer to the loom end.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what I
claim is―
"In letting-off motions for looms for weaving."
1st. The combination with the warp beam flange g of a laterally movable lever b
furnished indirectly or directly with friction plates fand the upper ends of which
levers are jointed to the loom side c or to a rod m and the lower ends by means of
rods I to a weighted lever i, oscillating on a stud and adapted to draw the lever
and friction plates fagainst the warp beam flange g and thereby exert lateral pressure
thereon, substantially as and for the purpose specified.
2nd. The combination with the weight lever i and its fulcrum /¹ and rods
adapted to draw the friction plates f of the levers laterally against the warp beam
flange g of a wheel s, in gear with the rack q' having attached weights k, k² and
capable of sliding on the lever i, which wheels receives its motion from a fesler o
having two rows of teeth o¹ & o², the latter being in gear with a pinion q fixed on
the fulcrum h' and the former with the weighted segmental toothed lever p adapted to
hold the feeler o constantly against the warp on the beam 9.and to draw the

page_text: weights k, k on the lever i selfactingly towards its fulcrum has the warp decreases
in diameter, substantially as and for the purpose specified.
Dated this 19th day of December 1890.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.