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Патент USA US2112933

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April 5, 1938.
Filed March 9, 1935
Patented Apr. 5', 1938
Walter M. Spring, Springvale, Maine, assignor
to Arlington Mills, Lawrence, Mass, a corpo
ration of Massachusetts
Application March 9, 1935, Serial No. 10,188
1 Claim.
(Cl. 19-124) '
The present invention relates to wool combing
One of the limiting factors in the speed of a
combing machine is the vibration which is prin
5 cipally caused by the rapid reciprocation of the
Measured in terms of angular displacement, the
dabbers. The vibration may be reduced and the
speed consequently increased by a proper de
crank for the dabber I8 is 90° behind the crank
of the dabber I6 or, in other words, the dabber
sign of the dabbing brush motion, as described,
for example, in my co-pending application Serial
No. 2,520, ?led January 19, 1935. Regardless of
re?nements in the motions themselves, however,
some residual vibration may remain, presumably
due to the combined effects of the dabber mo
tions and the combs.
I have discovered that in a combing machine
mately one-quarter cycle, that is to say, the dab
bing brush for the front dabber i6 is just ar
riving at the bottom of its stroke while the brush
for the rear dabber I8 is about halfway down.
l8 lags the dabber l6 by 90°. At this setting, the
vibration of the wholemachine is almost com
pletely eliminated, or at least sufficiently re 10
duced to permit a great increase in speed.
So far as I have been able to determine, there is
one and. only one setting for satisfactory reduc
tion of vibration. It might be supposed that
since the 90° setting herein shown has been found 15
having a plurality of dabbers, the vibration may
to give minimum vibration, another minimum
be almost completely eliminated or at least re
would be found by setting the dabber l8 to lead
the dabber l6 by 90°. This, however, is not the
case, as I have determined experimentally. It
is di?'icult, if not impossible, to account for the
failure to ?nd a second minimum. It is appar 20
ently true that the setting for minimum vibration
duced sufficiently to permit greatly increased
speed of operation, by setting and maintaining
20 a de?nite displacement between the dabbers.
According to the present invention, the several
dabbing brushes do not operate in complete in
dependence of each other but are caused to recip
rocate in a de?nite phase relation.
Since the
phase relation must be maintained, the belt drive
usually employed for dabbing motions is inade
quate and the present invention therefore con
templates a positive drive.
In the accompanying drawing, Fig. 1 is an ele
vation of a combing machine embodying the
features of the present invention, and Fig. 2 is an
elevation of the machine as viewed from the
right-hand end of Fig. 1.
The illustrated embodiment of the invention
comprises the machine having the pillars 2 each
surmounted by‘a gear box 4. The main driving
shaft 6 of the machine passes through the gear
boxes and carries at the center the fast and loose
pulleys 8 by which the machine is driven. The
40 gear boxes and pillars contain the usual gear
and shaft connections for driving the combs,
of which only the great circle comb I0 is illus
The shaft 6 carries at its ends sprocket wheels
l2 and M for driving the two dabbers l6 and
I8 respectively, which are disposed at diametri
cally opposite points of the comb. Each dabbing
brush motion is preferably, although not neces
sarily, of the type described in my co-pending
0 application above referred to, comprising a
sprocket driven by a chain 22 and operating a
crank 24 to reciprocate a slide 26 to the bottom
of which the dabbing brush 28 is attached.
As shown in Fig. 2, the dabbers do not operate
in unison but are set out of phase by approxi
is dependent in some complex manner on the di
rection of rotation of the combs and also on the
direction of rotation of the gear and shaft con
nections in the gear boxes and pillars. But
Whatever the theoretical considerations may be,
it is true that an optimum setting exists and may
be quickly determined by a simple test. It is
therefore inadvisable to attempt to specify the
particular setting in advance of operation. The
phase relations of the two dabbers may be ad
justed by varying the chain connections 22 to one
of the dabbers and the point of minimum vi
bration may be readily discovered by ?rst setting
one of the dabbers- about 90° in advance and
then 90° behind the other; The difference in
vibration between the two settings is great
enough so that the proper choice can be made
without difficulty. A ?ner adjustment may then
be made by slipping the chain one link at a time
until the vibration is brought to the absolute
Although the best phase displacement is found
to- be 90° or one-quarter cycle in the combing
machine of the type shown, it is possible that
with other types of machines. and dabbers, the
setting for minimum vibration may differ some
what from that value. In any case, however,
this setting can be very quickly determined by
trial. It is essential that both dabbers be posi
tively driven to maintain the setting after it has
once been established.
The conventional dabbing brush motions are
ordinary operated at not more than 900
R. P. M. By the present invention, the machine
A combing machine having, in combination,
may be speeded up to at least 1500 R. P. M.
with no more vibration than in the conventional
machine at the lower speed. The increased dab
bing speed may be utilized in either of two ways:
a great circle comb, two dabbing brush motions
a shaft, and means for positively driving both
dabbing brush motions from the shaft, the dab
by correspondingly increasing the comb speed for
bing brush motions being displaced in ?xed phase
a production increase of 60 to 7.0%, or by holding
the comb speed to a lower value for improved
at a setting of minimum vibration.
quality of wool.
relationship by approximately one-quarter cycle
The invention having been thus described, what
10 is claimed is:
at diametrically opposite points of the comb,
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