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Патент USA US2411303

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Nov. 19, 1946.
E. s1‘. PIERRE
2,411,303
CLUTCH AND PATTERN DRUM MECHANISM
Filed June 25, 1945
F1611.
5 Sheets-Sheet 1
F1610.
1|
Nov. 19, 1946.
E. ST. PIERRE
2,411,303
CLUTCH AND PATTERN DRUM MECHANISM
Filed June 23, 1945
5 Sheets—Sheet 2
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Nov. 19, 1946.
E. 81'. PIERRE
2,411,303
CLUTCH AND PATTERN DRUM MECHANISM
Filed June 23, 1945
5 Sheets-Sheet 3
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Nov. 19, 1946.
E. ST. PIERRE
2,411,303
CLUTCH AND PATTERN DRUM MECHANISM
Filed June 23, 1945
Fig.6.
5 Sheets-Sheet 4
FIG. 7.
Nov. 19, 1946.
E. ST. PIERRE
2,411,303
CLUTCH AND PATTERN DRUM MECHANISM
Filed June 25, 1945
5 Sheets-Sheet 5
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Patented Nov. 19, 1946
2,411,303
UNITED STATES PATENT ‘ OFFICE
2,411,303
CLUTCH AND PATTERN DRUM MECHANISM
Eugene St. Pierre, Pawtucket, R. I., assignor t0
'
Hemphill Company, Providence County, R. I.,
a corporation of Massachusetts
Application June 23, 1945, Serial No. 601,296
10 Claims.
(01. 66—155)
1
2
Fig. 10 is a developed view of the clutch ratchet,
This invention relates to a new and useful im
provement in mechanism for operating the clutch
.and pattern drum or drums of a knitting ma--‘
chine particularly of the circular independent
needle type such as the well-known Banner ma
chine.
Heretofore it has been customary to affix the
drum and clutch cams.
As shown in Fig. 1 the invention includes a
‘clutch drum l provided with eight clutch oper
ating cams 2 and 3 in‘two sets. A clutch operat
ing lever 4 is so pivoted as at 5 that its end 6 will
follow the track provided by cams 2 ‘and’ 3.
Ordinarily, when the end 6 of clutch lever 4 ison
clutch drum and one or more pattern drums to
“a cam 2, the clutch is shifted to cause the ma
the same shaft. To operate the clutch it has
been necessary to rotate the clutch drum the 10 chine to knit in a rotary manner. vWhen the. end
, 6 of clutch lever 4 is riding upon a cam 3 the
‘equivalent of four moves of the pattern drum.
Consequently, each time clutching was performed »
> at least three pattern drum moves were lost.
. clutch is reversed so that the machine is _re
A
‘
ciprocating.
‘
.
The nature of theclutch is too well known to
total of twelve to sixteen moves for each revolu
tion of the pattern drum were wasted in this 15 require‘ detailed description. It is generally
.. shown in Figs. 1 and 2‘as consisting of ‘a clutch
way. By this invention the loss of pattern drum
. member ‘I and operating mechanism including
moves through clutching is reduced to one per
a yoke 8 and a shifting rod 9 pivotally connected
operation and the operation of the pattern drum
to the end it of clutch lever 4 whereby the clutch
is made independent of the clutch drum at all
is shifted. Ordinarily, clutching occurs four
other times unless the clutch drum is also used as 20
times during the knitting of a stocking-at the
a pattern drum for certain special operations.
beginning and end of the heel and. at the begin
The form of the invention selected for descrip
ning and end of the toe. Since the pattern drum
tion herein is designed for the Banner type, in
shown herein provides for eight clutching oper
dependent needle, knitting machine but the in
ations, only one-half of one revolution of the
vention is not so limited because it may readily 25 clutch drum is required for a stocking. This
be adapted to other types of knitting machines.
makes it possible to utilize the clutch drum for
In the drawings:
other purposes such as “tipping.” In such case,
Fig. 1 is a front elevation of a part of a knit
the cams are altered to provide four clutching
ting machine illustrating the clutch drum, the 30 operations per revolution, the reciprocatory
pattern chain and its sprocket and a pattern
clutching operation being extended through the
drum together with their operation mechanisms
normally intervening rotary period. Yarn change
and also the clutch operating mechanism;
levers such as those indicated at H may then
Fig. 2 is a side elevation illustrating partic
‘ularly the clutch drum, ratchet and pawl, the
clutch operating mechanism and the means
be operated by suitably positioned rows of cams
(not shown) on the clutch drum to effect the
O
. necessary yarn changes.'
whereby the pawl is controlled;
As usual, the clutch drum is rotated by a pawl
l2 (Fig. 2) mounted upon the quadrant shaft 13
nisms of Fig. 1;
and adapted to engage clutch drum ratchet l4.
Fig. 4 is a view illustrating the pattern drum 40 When in operation each working stroke of this
ratchet and pawl and the pawl operating mecha
pawl will rotate the clutch drum sui?ciently to
e?‘ect a full clutching operation, i. e., from rotary
Fig. 5 is a view illustrating the pattern chain
to reciprocatory ‘motion or vice versa. Ordi
ratchet, its operating mechanism, the pattern
narily, this is the equivalent of four moves of the
drum' operating pawl and the means for control 45 pattern drum and, heretofore, since the pattern
Fig. 3 is a plan view of a part of the mecha
ling this pawl;
Fig. 6 is a view alsoillustrating the pattern
drum pawl and its controlling means in another
position;
drum has been attached to the same shaft as
- the clutch drum, it has resulted in a loss of at
1 least three pattern drum moves.
In this invention the pattern drum I5 is freely
Fig. '7 is a detail of the pattern chain and its 50 rotatable with its shaft and is turned by its own
relation to the pawl controlling mechanism
pawl I6 operating upon ratchet H (see Figs. 1, 3,
under certain conditions;
4, 5 and 6). Pawl It also is operated from the
quadrant l8. by means of an adjustable link 19.
Pawl I6 is capable of turning pattern drum I5
' ‘ Figs. 8‘ and 9 are a side elevation and plan view
.‘ respectively of an auxiliary control device for the
clutch drum pawl; and
55
to the extent of one or two teeth of ratchet l1
2,411,303
3
4
per working stroke which is the equivalent of
This might not be desired and, consequently,
one or two moves of the pattern drum.
other means to keep clutch pawl l2 out of oper
The machine is also provided with the usual
pattern chain sprocket 20 and pattern chain 2|
ation is provided.
turned at a constant rate by means of ratchet
wrong time when for any reason the timing of
the pattern chain has been disturbed. For ex_
23 and pawl 22 which is operated from quadrant
This means also serves as a‘
safety device for preventing clutching at the
shaft 13 by suitable mechanism such as that
ample, when testing thermachine it is common to
shown in Fig. .5. Pawl 22 isso arranged that .it
pull the pattern chain around by hand .to reduce
‘the timerequired to reach a certain point of the
will move the pattern drum the “distance of one
tooth of ratchet 23 per working stroke.
10 knitting where some di?iculty may have ap
peared. This changes the timing of the pattern
The pattern chain is adapted to carry the
usual lugs by means of which it is able to con
chain so that clutching would occur at the wrong
time. ‘Tomake this impossible under any condi
trol various operations of the machine. .As
sociated with the pattern .chainsprocket 20 so
tions the mechanism shown in Figs. 8 and 9 is
provided. This consists of an additional drum 33
as to be engageable by such lugs ‘is :arock lever
rigidly attached to the same shaft as pattern
24 attached to a shaft 25 rotatably mountedin
drum l5. Consequently, these two drums will
suitable bearings and having an extension pro
turn together. Drum 33 is provided with lugs 34
j ecting towards clutch drum sprocket vI 4 and hav
arranged in a corresponding manner to cams 2
ing af?xed at this end another rock lever 26.
and 3 on clutch drum 1. A pawl 35 is operated
The tail 21 of rock lever 26 is provided with a
by cams 34 and is provided with an extension 36
depending hook 28 (Fig. 2) which passes under
which has a pin J37 ‘under-lying clutch drum pawl
the ‘forward end of pawl {2. Whenever a pat
t2. Whenever pawl ‘35 is raised by a cam 34
tern chain lug passes under rocker 24 it will lift
’ clutch pawl i2 cannot move into operating posi
that end of the rocker and, consequently, de
press vthe other end an amount depending upon 25 tion. Therefore, since drum Mend pattern drum
65 'must turn togetheniit is absolutely impossible
theheig'ht of the ‘lug. If a low lug such as 29
for clutching to occur at an improper time no
shown‘in Fig. 7 passes beneath rocker 24, the tail
matter what has happened tothe pattern ‘chain
3!] of this ‘rocker'will be depressed ‘sufficiently to
and-no'matter -what the adjustment is of rockers
‘permit pattern drum pawl It to engage with its
ratchet l‘! to turn it and, consequently, the pat 30 24 and 26,
I claim:
tern drum to the "extent "of one tooth ‘which is
1. A mechanism for a knitting machine which
ordinarily equivalent to a single move of the pat
»#consists of a pluralityof drums capableof inde
tern drum. 'Since rockers 2'4 and 26 are con
pendent step by step rotation, means for inde
nected together as already described, the tail 2‘!
of rocker 26 will be’ similarly depressed. There 35 pendently .rotating’one of said drums through :a
.fore, ‘pawl I2 ‘which ‘operates the clutch drum
‘givenlangle per step, means for independently ro
ratchet M will be lowered but'not enough 'to'per
mit'the pawl to engage with the ratchet. Con
sequently, the ~clutch~drum remains inactive.
tating another of said‘drums through a smaller
angle per step and cornmonmeansgforlcontrolling
both of said rotating meanssothat one, both or
If a. higher pattern chain vlug such as that 40 neither of said drums is rotated as described
above,
shown at 3| in Fig. '7 passes under rocker 24, the
‘2. ,A mechanism for .aknitting machine which
tail 3!) of that rocker will be depressed sufficiently
to-causeipawl 16 to operate pattern drum ratchet
consists of a plurality .of drums capable of inde
[5 to the extent of two teeth per throw or the
pendent stepby step rotation, means .for rotating
equivalent of two moves of the pattern drum. -
one of said drums through a given. angle per step,
means for rotating another of said drums
through a smaller angle .per step and common
means for controlling both of .said rotatingmeans
so that-said last mentionedtdrumalone is rotated
or both of said drums arerotated-atsaid different
angular step by step ‘speeds or neither .of said
drums is rotated.
The equivalent lowering of tail 2'! of rocker 26
permits vpawl l2 to engage with'and turn clutch
' drum ratchet ‘l4.
As already stated, the move
ement'o'f pawl l 2 when in operation is sufficient to
rotate ratchet M and, consequently, clutch drum ;
l_, a full clutching operation which is ordinarily
the equivalent of ‘four moves of pattern drum I5.
However, since the ‘pattern drum is turned by its
own pawl 16 the equivalent of two moves, the
‘other two moves which heretofore would have i
been wasted are preserved for ‘later use. Since
the double move of the pattern drum which oc
curs when clutching can be utilized, a single
moveinstead of three is wasted ‘when clutching
occurs. Thus the capacity of the pattern drum
and of ‘the machine is greatly increased without
material complication. Whenever rocker '24 is
not riding upon ‘a pattern chain lug, the pattern
‘and clutch drum‘pawls areiboth inactive.
It sometimes happens thatv a 'still'higher pat
’ tern chain lug such ‘as-shown at 32 in Fig. 7 is
used for a special purpose or because it happens
to 'be available. When such a ‘lug "passes under
3. A mechanism ..for .a knitting machine ac
cording to claim -2 in which the means for-oper
atingthe common controlmeans-is an independ
ently operated pattern chain.
4. A mechanism ‘for .a knitting machine ac
cording to claim 2 which also includes lock out
means for rendering ‘inoperative the rotating
means of said ?rst mentioned drumindepend
ently of said common control means.
5. A mechanism for a knitting machine ,ac
cording to claim 2 which includes lockout means
for “rendering inoperative‘the rotating means of
said?rst mentioneddrum independently of said
common control means without affecting the
control of said common control means .upon the
‘operating means of ‘said i?rst mentioned drum.
rocker 24 it would depress tail '30 of this rocker
and also tail 2? of rocker 26 still more. This
would not affect ‘the rate of rotation of pattern
drum I5 because its ‘pawl is arranged to turn it at
a maximum rate of two teeth per throw. How
ever, clutch pawl ‘12 would also be lowered into
‘means for ‘rotating the "pattern drum througha
operating position so that-clutching would occur,
smaller angle per step and common ‘means :for
6. A mechanism fora knitting machine which
consists of a clutch drum and a pattern drum,
each of said drums ‘being capable of independent
step 'by step rotation, means for rotating said
clutch drum through ‘a given angle per step,
5
2,411,303
controlling both said clutch and pattern drums
so that said pattern drum alone is rotated or both
said clutch and pattern drums are rotated at said
di?erent angular step by step speeds or neither
of said drums is rotated.
7. A mechanism for a knitting machine ac
cording to claim 6 in which the means for oper
ating the common control means is an independ
ently operated pattern I chain.
‘8. A mechanism for a knitting machine ac
cording to claim 6 which also includes a third
drum rotatable with said pattern drum and hav
ing means for rendering inoperative the clutch
drum rotating means independently of said com
mon control means.
9. A mechanism for a knitting machine which
6
consists of a plurality of drums capable of inde
pendent step by step rotation, means for rotat
ing one of said drums through a given angle per
step, and through a greater angle per step, means
for rotating another of said drums simultaneous
ly with the rotation of said ?rst mentioned drum
through said greater angle per step and common
means for controlling both of said rotating means
as above described and for preventing the rota
tion of both of said drums.
10. A mechanism for a knitting machine ac
cording to claim 9 which also includes lock out
means for rendering inoperative the rotating
means of said last mentioned drum independent
ly of said common control means.
EUGENE ST. PIERRE.
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