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Патент USA US2405782

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Aug. 13, 1946.
Fileld Dec. 7, 1944
720314 5
Patented Aug. 13, 1946
2,405,732 ‘
Peter Florjancic and Emil Boral, Zurich, Switzer
land, assignors to Max Bucher, Zurich, Switzer
Application December 7, 1944, Serial No. 567,058
In Switzerland July 26, 1943
5 Claims._ (Cl. 139—32) I
This invention relates to heald shaft motions ‘
for hand looms.
In hand 1ooms the number of eccentrics and
pedal, levers required for the actuation of the
heald shaft motions depends upon the number of 5
heald shafts provided, ‘the latter number depend
ing in turn upon the weaveto be produced, that
is,_t_he number of threads to be differently inserted
in the repeat of pattern of the weave.
In contrast to the conventional mode of pro
cedure, in» the heald shaft motion for hand ‘op
tubular guide 24 the lower end of which is closed
and which houses a helical spring 25 (Fig. 6).
By means of its two supporting rods 23 each shaft
is resiliently supported on the springs 25 in the
two respective guide tubes 24. The four guide
tubes’ 24 that are situated at adjacent ends of
the shafts I‘! to 20 are welded together with
a common connecting rod 26 of the loom frame.
The numeral 21 refers to the slay which is swing
10 ably arranged by means of slay swords 28 in a
manner known per se and carries the reed 29.
erated looms, according to the present invention,
The numerals 38 and 3! denote warp threads
a plurality of shaft actuating lifting members are
arriving-from the Warp beam 32. The-cloth beam
turned by a single reciprocatory control lever.
is referred to. as .33.
By this means the construction and the opera-‘j’ 15 . Ontheshaft 5 carrying the cams 6 to 9 is fur
tion of the heald shaft motion is simpli?ed, there
by to simplify the attendance and to increase the
ther arranged a sprocket 34 the rim of which is
secured to a hub portion 35 which is connected
, An embodiment of’ the invention is illustrated
for rotation with the pivot 5 by a key l8. Be
tween the hub portion 35 and the sprocket rim
e?‘lciency of working.
by way of example-only in the accompanying 20 balls 36 are included so as to form together with
drawing in which
I Fig. 1 shows avheald shaft motion according to
the present invention in elevation;
Fig. 2 shows a partial top plan view of Fig. 1;
said parts ‘a unidirectional coupling, that is, a
free wheel hub arrangement. About the rim of
the sprocket 34 passes a chain 31 one end of which
is attached to a tension spring 38 and the other
. Fig. 3 shows a part of the heald shaft motion in 25 to a two-armed pedal lever 39. The other end
side elevation on a larger scale;
' of the tension spring 38 is hooked to a hook 48
Fig. 4 is a horizontal section of Fig. 3;
which is-fastened on- one of the carriers 3. The
,‘Fig. 5 is a view of one of ‘the ends of a shaft,
pedal lever 39 is mounted on the rod 2 and is
provided on its lower side with a, set screw 4|
Fig.6 shows supporting means for the shaft in a 30 which serves as a stop for limiting the throw of
longitudinal section.
As ‘shown in Figs. 1 and 2, in the frame of the
loom on two-‘lower ‘rods l and 2 extending parallel
to each other, two carriers 3 which extend trans
versely of said rods are supported and have ar
ranged thereon a pivot 5 by means of bearings 4.
On the pivot 5 four lifting cams 6, 1, 8 and 9 are
the pedal lever 39 by hitting the .floor as'this lever
moves in the corresponding direction. A set screw
42 arranged on one of the carriers 3 serves as
an abutment for limiting the throw of the pedal
r lever 39 in the other direction of movement.
The operation of the loom is as follows:
By depressing the pedal lever 39 in the direction
mounted which are united into a block and are
of the arrow shown in Fig. 1 the pivot 5 is ac
connected to the shaft 5 by means of a key l9
cordingly turned by action of the chain 31 and
for common rotation therewith. With each of 40 consequent stressing of the spring 38, due to the
the four lifting cams 6 to 9 which have a form
coupling formed vby the warp beam then be
similar to a quadrant and are all relatively offset
coming e?ective. By way of example it is as
at angles at the center of 90° individual actuat
sumed that the cam 6 is thus rendered operative
ing rods H to M respectively cooperate.
whereby the associated shaft is moved downward
The four actuating rods H to M provided are 45 against the in?uence of the pair of springs 25.’
swingably mounted at one of their ends on a
Relieving of the pressure exerted on the pedal
bolt l5 which is arranged in common with said
lever 39 results in restoring said lever into posi
rods and is secured to both carriers 3. The other
tion of rest under the influence of the tension
ends of said rods are each connected by means
spring 38, while the coupling formed by the
of a cord drive is with one of four shafts l‘! to 50 sprocket 34 is ineffective.
28 respectively, in a known manner.
When the pedal lever 39 is depressed anew the
Each of said shafts I‘! to 28 which, as shown
cam 8 and thus the cam 'l and eventually also
in Fig. 5, carry healds 22 by means of two shaft
the cam 9 is ‘rendered effective, whereupon the
staves 2|, carries on both of its ends a stationary
cycle of operations is repeated. In consequence
supporting bar 23 for interengagement with a 55 of the cam 8 or‘ 9 respectively operating, the as
1. In a heald drive means for hand looms, a
common cam shaft having a plurality of heald
controlling cams mounted thereon, a plurality of
heald shafts each corresponding to one of the
sociated shafts are obviously moved downward.
As the individual cams 6 or ‘I, 8, 9 respectively
are rendered inoperative the associated shafts
return into their upper positions by in?uence of
cams respectively, a single pedal, means connect
ing the pedal with the cam shaft for operating
the cam shaft always in the same direction, and
a spring connected with the shaft operating
the associated pair of springs 25.
In the present instance the pivot 5 carrying
the cams B to. 9 has performed one revolution
after having been controlled four times by means
means so as to be stressed by the actuation of
of the pedal lever 39. If a lesser or greater num
ber of cams is provided the throw of the pedal ll) the pedal.
2. A heald drive means for hand looms as de
lever 39 is accordingly adjusted to greater or
?ned in claim 1, and having means for adjust
smaller range. Naturally, the angular ranges of
ing ‘the stroke of the pedal.
the cams about the pivot 5, that is, said ranges
‘3. In a heald shaft motion for hand looms, a
of the cams relatively to each vother, may be ad
plurality of heald shafts, a rotary lifting mem
justable. The point at which the tension spring
38 is attached to the loom frame may, if desired,
be adjustable, for example by means of a sliding
. ber operatively ‘connected with each of said
shafts for actuating said shafts, a unidirectional
coupling operatively associated with said lifting
members, and a single reciprocatory control 1e
The possibility of moving all of the shafts o
groups of shafts as a whole through the inter 20 ver operatively associated with said coupling for
rotating said lifting members only in one di
mediairy of a single pedal lever ‘simpli?es the
rection of movement of said control lever ‘by vir
work ‘of ‘the attendant- person to a great ‘extent
tue of said unidirectional coupling.
compared with the conventional mode of using
4. In a heald shaft motion for hand looms, a
both feet for the pedal lever control so that in
the event that more than two pedal levers are 25 plurality of heald shafts, a rotary lifting mem
ber voperatively connected with each of said
shafts for actuating said shafts, a ‘unidirectional
to be dislocated. In the heald shaft motion ac
coupling operatively associated with said lifting
cording to the present invention the attendant
members, said coupling including a sprocket, a.
person may control the ‘pedalleverl‘w'ith either
footyas desired, and in connection therewitnthe 30 free wheel hub arrangement included in ‘said
sprocket, and a single reciprocatory ‘control ‘ile
heel or the front
of the feel: may abut
ver operatively vassociated.‘with said ‘sprocket ‘for
against or ‘be sustained by the ?oor respectively.
rotating said lifting members only‘in oneE‘dii'c'c
'The ‘relief obtained for ‘the attendant person
tion of movement ‘of said‘ control ‘lever ‘by ‘virtue
by means of the heald shaft motion according to
provided the lever ‘control even requires the feet
the _-present ‘invention enables-this person to at
35 of said unidirectional ‘coupling,
tend 'to the ‘other work, that is, ‘to/the 'weaving
operation ‘proper with more concentration of
mind and economy of physical strength in con
sequence ‘whereof theife?'icienc'y of weaving is in
The heald shaft "motion ‘according to ‘the vpries
ent invention lrequires relatively little space and
cost of manufacture, due to being of simplecon
struction, and since ‘the weight bf Iits movable
parts can be kept down the operation ‘of this
heald shaft ‘motion "can 3be -e?ected with little ref»
fort. owing to the iiact that the islay ‘is ~Stip-'
ported, that ‘is, mountediin hearings at its lower
position, and also "for other reasons iup‘pe'r ‘top
mountings are avoided, a ‘loom devoid of -'a ‘top ‘
mounting ‘is ‘devised according to this invention
with ‘its attendant known advantages;
‘We claim:
5. In a 'lheald'shaft motion ror ‘hand ‘looms, ‘a
plurality of heald shafts‘y a v‘rotary lifting mem
ber operatively connected *with each 'of said
shafts for actuating ‘said shafts, a ‘unidirection
al coupling operatively associated ‘with-said ‘lift;
ing members, said coupling including a sprocket,
a ‘free wheel hub arrangement included in :said
sprocket, a rotary pivot provided in :common
with said lifting members and ‘said free wheel
hub v'arrang‘enrlexit for jointly rotating said mem
bers and said free wheel hub arrangement, and
a single ‘reciprocatcry control llever operatively
associated with said ls‘procket for ‘rotating ‘said
lifting members only in one direction of move
ment or said control lever by virtue of said uni
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