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Патент USA US2118975

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May 31, 1938.
Filed Nov. 5, 1936
17 '
24_ 2619-29156’
Sheets-Sheet l
May 31, 1938.
T. B. HUNT ‘
Filed Nov. 3, 1936
} $3383???
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2 Sheets-Sheet 2
Patented May 31', 1938
Thomas Bethel Hunt, Macon, Ga.
Application November 3, 1936, Serial No. 109,044
1 Claim. (Cl. 19—-106)
This invention relates to improvements in therein, and reducing the consumption of oil to
doffer-comb oscillating mechanisms of carding
machines, and it consists of the constructions,
combinations and arrangements herein described
5 and claimed.
Those portions of the present carding machine
with which the invention is most directly con
cerned, comprise a rotating doffer cylinder from
the toothed surface of which an accumulation of
cotton lint is stripped in the form of a web by the
operation of a comb. This comb oscillates at a
set location in the carding machine, and the do?‘er
cylinder rotates past the comb.
Said comb makes approximately eight hundred
15 complete oscillations per minute, and the known
means for producing the oscillations happens to
be of such a construction that it suffers excessive
wear because of the necessarily high rate of op
eration. As the wear increases it creates a vi
20 bration in the comb shaft. This vibration causes
an uneven stroke of the comb and, consequently,
impairs the ei?ciency of the comb in stripping the
cotton web off of the do?er cylinder. A further
e?ect of this vibration is an unsteady ?apping
25 motion of the drive belt, which will in a short
time destroy the belt as well as the oscillating
The foregoing wear in the oscillating mecha
nism makes the looseness between the moving
30 parts evident. This looseness results in excessive
rubbing and pounding, and the consequent heat
consumes an execssive amountof lubricating oil.
In present carding machines there is no pro
vision for varying the stroke of the comb. A
35 decrease in the speed of its drive shaft, in an en
deavor to damp out some of the undesired vibra
tion in the comb shaft and to steady the stroke
of the comb, will directly reduce the rate of oscil
lation of the comb, without necessarily relieving
40 the foregoing defects, with the result that the
comb will not operate at a sufficiently rapid rate
to properly strip the web from the doffer cylinder.
Therefore the objects of the invention are as fol
First, to provide an oscillating mechanism for a
carding machine, by means of which the comb
will strip the cotton web off of the doifer cylinder
without vibration.
Second, to provide an oscillating mechanism of
50 the type described in which the connection be
tween the driving and comb shafts is constructed
both with a view to reducing the frictional con
tacting area from what it is in current machines,
consequently lessening the possibilities of loosen
55 ing of the parts and the development of heat
a minimum.
Third, to provide an oscillating mechanism for
the purpose described which lends itself to an in
crease in the stroke of the comb with a reduction
of the speed of the driving shaft, thereby further
reducing friction and wear.
Fourth, to provide an oscillating mechanism
that is simple in construction, inexpensive to
manufacture, economical in operation, and which
can be installed without making any alterations
in the present carding machines other than to
replace the known oscillating mechanisms of the
Other objects and advantages will appear‘ in the 1.5:.
following speci?catiomreference being had to the
accompanying drawings, in which:
Figure 1 is a plan view of the front end of a
carding machine in which the improved oscillat
ing mechanism is installed,
Figure 2 is a side elevation of the structure
shown in Figure 1,
Figure 3 is a vertical section taken substan
tially on the line 3-3 of Figure 2,
Figure 4 is a vertical section taken on the line 25
4-4 of Figure 3, but also illustrating a portion
of the adjacent doffer cylinder, and
Figure 5 is a detail perspective view of the im
proved oscillating mechanism.
Those portions of the known carding machine 30'
with which the invention is directly concerned,
are briefly described as follows: The base It
carries a doffer cylinder II, the shaft of which is
journaled in bearings I2 that are a?ixed to the
base. A doffer comb I3 is secured to the rocker 35
or comb shaft M by means of ?ngers l 5.
The mid-portion of the shaft is of greater di
ameter than its end extensions Ma, and said
mid-portion is situated eccentrically to said ex
tensions so as to counterbalance the comb l3. 40
One of the extensions Ma is mounted in an ad
justable bearing which is securable to the base I I]
by bolts I‘! after any necessary adjustment.
The other extension Illa is mounted in an ad
justable bearing box l8 (Fig. 3) which is secured 45
to the base ID by a bolt N) (Fig. 4). The adjust
ing means for this box is shown in Figs. 1 and 2.
The bearing box 18 also carries a driving shaft
20. Its inner end is supported by an internal
boss 2| (Fig. 3), and adjacent to its outer end it 50
is supported by a bearing 22. A double-grooved
pulley 23 on the end of the driving shaft 20 is
connected with a similar pulley 24 on a counter
shaft 25 (Fig. 2) by a belt 26.
At this point it is thought desirable to introduce 55
following improved oscillating mechanism: The
full effect to the lever 28. The rotation of the
driving shaft 20 is uniform. The off-center posi
hub 21 (Fig. 3) of a double~armed lever 28 is
?rmly secured to that extension [4a of the comb
tion of the eccentric 31 is balanced by a counter
weight 39 (Fig. 3) which is in a position similar
shaft which occupies the bearing box [8. The
securing means comprises a pair of screws 29, 30
(Fig. 4), one preferably being headed, the other
to that of the eccentric but on the opposite side
of the driving shaft.
the details of the invention which comprise the
provided with a socket, each bearing on a sleeve
3| on the extension 14a. The sleeve is slotted
10 at 32 to divide it into segments. The screws bear
on two of the segments, and when they are driven
home they not only cause the adjacent segments
to press against the extension Ma, but also in re
acting upon the hub 21 cause the latter to draw
15 up on the remaining segments and so ?rmly
clamp the extension all around.
While the screws 29, 30 produce an extremely
?rm connection between the hub 21 and the
extension Ma, yet the hub is readily removed
20 upon undoing the screws, and this is essential
to enable the substitution of a lever having
longer or shorter arms 28 than those depicted
in the drawing. The particular length of the
lever between the points 33 and 34 (Fig. 4.) is
25 to be understood as being such as will produce
an approximately 2" stroke of the comb I3 be
tween the full and dotted line positions.
This stroke is longer than the comb stroke
in known carding machines by approximately
30 three quarters of an inch, and the increased
stroke is herein produced by running the driv
ing shaft 28 at a less speed than in known card
ing machines. This, therefore, illustrates one of
the outstanding objects of the invention, namely,
35 the ability to reduce the speed of the driving
shaft 20 but at the same time increase the stroke
of the comb 13. Further increases in the stroke
of the comb I3 may be obtained, still adhering
to the same driving shaft speed, by substituting
40 other levers 28 with progressively shorter arms.
Thus there is no inherent vibration in the
driving shaft itself. The motion of the eccentric
31 is transmitted to the lever 28 very smoothly,
and inasmuch as the contact of the single arm 1O
35 with the double-armed lever 28 is con?ned to
a. small area it follows that any heating at this
point will almost be imperceptible. The bearing
box I8 contains a quantity of lubricating oil (Fig.
4) and the motion of the eccentric strap 36 15
serves to distribute the oil to the adjacent moving
The operation is readily understood. As the
doffer cylinder II revolves (Fig. 2), the cotton
lint adhering to the carding pins is doifed or
stripped off by the rapid vibration of the comb
l3. The resulting product is a Web, so marked
in each of Figs. 1 and 2. This web is drawn
away by the calender rolls 40 which reduce the
web to a strand. The strand is conducted into 25
a coiler head (not shown) where it is condensed
into what is known as sliver. The invention has
no concern with the product of the carding ma
chine excepting the eflicient manner in which
the improved oscillating mechanism, which is the 30
invention, strips the lint from the carding cylin
I claim:—
In a carding machine, a pair of bearing boxes
of which one is hollow, an actuating arm con
tained by said hollow box, a drive shaft jour
nalled in the hollow box and carrying an eccen
tric upon which said arm is mounted, a comb
Or the stroke of the comb can be reduced, with
shaft having end extensions journalled upon the
respective boxes, a double-armed lever having 40
means by which it is removably secured upon
out changing the driving shaft speed, by substi
tuting levers 28 having progressively longer arms.
one of the extensions in such position as to
straddle and contain the free end of the actu
Oscillating motion is transmitted to the double
45 armed lever 28 by the single arm 35 (Fig. 4) on
the strap 36 of an eccentric 31 on the driving
shaft 20. The double arms 28 straddle the single
arm 35, and a connection is made between the
two by a pin 38. It will be seen (Fig. 4) that
50 the arms 28, 35 are practically at right angles
to each other. The slightest reciprocatory mo
tion of the single arm 35 is thus transmitted with
ating arm, means pivotally connecting the free
ends of the actuating and lever arms, and caps 45
upon the bearing boxes, completing the journals
for the extensions and having means by which
they are removably secured thereby enabling the
removal of the caps and of the comb shaft for
the replacement of the double-armed lever.
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