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Патент USA US2116243

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Mgy 3, 1938.
R. W. JOHNSON
2,1 16,243
CHUCK
Filed NOV. 19, 1936
'3 Sheets-Sheet l.
May 3, 19%-
l.
R. w. JOHNSON
2,116,243
CHUCK
Filed Nov. 19, 1936
>3_Sheets-Shee’r, 2
May _3, 1938.
R. W. JOHNSON I
2,1 16,243>
CHUCK
Filed Nov. 419, 193e
53%È?@
5 sheets-sheet 5 '
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Patented May 3,1938
y
l
-
2,116,243
UNITED STATES PATENT OFFICE
2,116,243
CHUCK
Ray W. Johnson, Chicago, Ill.
Application November 19, 1936, Serial No. 111,660
10 Claims. (Cl. 242-68)
This invention relates to chucks, and is par- ating mechanism of the chuck in order to effect
ticularly concerned with chucks of the type securement.
adapted to be employed in combination with a
shaft for holding rolls of paper or other materials
5 which are to be mounted on a shaft for wrapping
or unwrapping.
,
means of a special tool.
The devices of the prior art are subject to the
disadvantage that the engaging jaws -have an
Another object is the provision of an improved
chuck of the class‘described which is adaptable
axial movement with respect to the shaft on
for use on either end of the paper roll or shaft
10 which the roll is mounted, and thus it is frequently found that after the roll has been secured in place the paper is out oí alignment with
the other mechanism of the press or other machine in which the paper is used.
'
15
One of the objects of the invention is the pro-
and which is sturdy, economical, and capable of 10
manufacture with a minimum amount of ma
chine operations. ‘
-
\
vision of an improved chuck for paper rolls or the
characters of reference indicate similar ‘ parts
throughout the several views.
` ` they secure and engage, thereby assuring the se-
2b curement of the roll in aligned position, once it
is moved into that position.
,
The devices of the prior art are also subje
to the disadvantage that the jaws are actuated byV
rotatable threaded members, and the threaded
25' parts of those chucks `have to be so arranged with
a left handand a right hand thread that they
will be tightened by the rotation of the shaft.
However, such devices are frequently loosened
when the shaft is temporarily rotated in the
3G other direction, or the mechanics may become
‘
’ Referring to the three sheets of drawings ac
companying the specification,
‘
Fig. 1 is a fragmentary diagrammatic view of a 2‘0"
pair of chucks constructed according to the in
vention, mounted on a roll supporting shaft,
showing the usual mode of use 0f Such Chucks;
Fig. 2‘is a fragmentary vertical sectional view,
taken through the mechanism of Fig, 1, on the 25
plane 2_2 of Fig. 6, passing through the axis
of the shaft;
‘
‘
Fig. 3 is- a sectional view, taken on the plane
of the line 3--.-3 of Fig. 1, looking in the direction
of the arrows, and showing the jaw securing 30
confused in the assembly of the devices so that
mechanism;
the threads may be wrongly arranged.
Another> object of the invention is the provi-
Fig. ‘l` is a vertical sectional view, taken on
the plane of the line 4_4 of Fig. l, looking in
` sion of an improved chuck for paper rolls or the
35 like which does not require any right hand or left
hand threaded members, so that the chuck is not
loosened by rotation in the opposite direction
Y
Other objects and advantages of the invention
will be apparent from the following description
and the accompanying drawings, in which similar 15
like in which the engagingjaws do not have an
axial movement with respect to theV 'roll which
40
Another object of the invention is the provision
of an improved chuck of the class described which
is adapted to be quickly and easily released by 5
g
the direction of the arrows, showing the means
for moving the jaws into engagement with the 35
interior of the roll;
Fig. 5 is an elevational view of a combination
and there is no possibility of assembling the
chuck with the shaft in the wrong way.
'
wrench and chuck-releasing tool;
‘ Fig. 6 is a sectional View, taken on the plan
Another object of the invention is the provision
of an improved chuck of the class described, the
of the line 6-6 of Fig. 1, looking in the direction 40
of thearrows, showing the means for securing
jaws of Awhich are adapted to be brought into
the chuck tothe shaft;
tight engagement with the interior of a paper
roll by the peripheral> motion of certain parts
Fig. 7 is a View in perspective of the mecha
nism with the jaw retaining housing and the
»
i
.
-
45 rather than the axial motion thereof, thereby as-
jaws removed;`
suring the alignment of the roll after the chuck
is secured to the roll.`
Another object of the invention is the provision of an improved chuck of the class described,v
50 which has means for securing the jaws inv any of
a plurality of predetermined positions, which securing means is adapted to elfectV the securement of the jaws upon relatively small steps >of
Fig. 8 is a view in perspective of the jaw re
taining housing, partially broken away to show
the groove for the jaw flanges; and
Fig. 9 is. a `view in perspective of one of the
jaws of the chuck, shown in such a position rela- 50
tive to Fig. 8 as to permit its ready insertion.
Referring to Figs. l and 2, Hl indicates in its
entirety one chuck, and Il the other chuck,
,
45
movement so that there is` little or practically
55V no backlash or backward movement of the actu-
mounted on a shaft i2 for the purpose of securing
a roll of‘ paper I3 to the shaft. The shaft ‘ l2 is 55
2
2,116,243
rotatably mounted in the bearings I4, I5, and
enlarged portions 30 slidably engaging the walls
is adapted to be removed from the bearings for
the purpose of passing the shaft through the
of the sockets 3|.
A portion of the frusto~conical outer wall 35 is
cut away at 40, so that when this part of the
housing is assembled with the other part 4|,
which comprises a ratchet housing, there is an
cylindrical core I6 upon which the paper of the
roll I3 is usually wound. It will be observed that
j the chucks I0 and II are oppositely disposed on
the shaft I 2, but otherwise these chucks are iden
tical in construction and interchangeable so that
there is no possibility of wrong assembly of the
10 chucks with the shaft.
Referring to Figs. '1 and 8, I shall now describe
one of the chucks in detail. The chuck prefer
ably includes a plurality of jaws I1 of identical
construction, and any number of jaws may be
15 used, but I prefer to use three separate jaws in
the preferred embodiment, and have numbered
them I1, I8, and I9 in Figßl.
,
Each of these jaws comprises an elongated cast
metal member which is curved like part of a
20 cylinder, and which is provided at its end with
the retaining flanges 20. The outer surface 2|
of each jaw may be substantially cylindrical, and
it may, if desired, be provided with a plurality
of grooves 22, giving the outer face 2| of the jaw
25 a serrated surface, but I have found such serra
tions are not necessary.
The cylindrical surface 2| is substantially com
plementary to the cylindrical bore 23 on the in
side of the cardboard core IB of the paper roll
30 I3, but each jaw covers less than one-third of
the periphery of the interior of the core I6 so as
to permit enough clearance so that the jaws may
contract and expand within a core I6.
The inner curved surface 24 of each jaw is not
35k
40
45
50
60
cylindrical, but diverges from the cylindrical
for'n'i'by curving farther inward at the point 25
than its location at the point 26; that is, the jaw
aperture 42 for the passage of a force-multiplying
lever 43.
The chuck-retaining housing is provided with
a laterally projecting cylindrical wall 44, serving 10
as part of a housing for the ratchet mechanism,
and it is provided with screw supporting lugs 45,
located to be aligned with similar screw support
ing lugs on the ratchet housing 4| (Fig. 7).
Screws passing through the ratchet housing 4|
and threaded into bores in the jaw retaining
housing 28 secure these two parts together to
form the chuck head.
Referring to Fig. 7, the chuck is preferably
provided with means for positively securing the 20
chuck head 32 to the shaft I2, comprising the
relatively heavy cylindrical extension 46, form
ing a collar which is separated from the housing
4| half-way as by a groove 41.
Collar 46 is also split radially at the slot 48
(Fig. '1), and the two legs 49, 5l) are joined by a
threaded member 5I, located in the bore 52 and
threaded into an aligned bore in the leg 56.
Threaded member 5| has a non-circular socket
53 for reception of the non-circular (hexagonal) 30
bent end 54 of the wrench and releasing tool
55 (Fig. 5). By means of the collar 46 it is
possible to clamp each chuck in proper position
0n the shaft I2 simply by driving the threaded
membery 5| home into a threaded bore in the 35
leg 50.
The housing member 4| is provided with a
is made thicker at the top of Fig. 9 than it is at radially extending supporting flange 56 and with
the bottom of Fig. 9, and thus the inner surface ' an outer cylindrical flange 51, the latter being
24 is a camming surface, the upper portion of also cut away at 58 at a point which registers
which in Fig. 9 is disposed at a lesser radius with the cut-away portion 40 of the housing 28.
from the center of the shaft than the lower This housing member is provided with a cylin
drical bore 59 for receiving the shaft I2, and it
portion.
Each of the jaws |1-I9 is also provided with is secured to the housing member 28 by a plu
rality of screw bolts 60 (Fig. 3). The flange 56
an alignment flange 21, comprising a radially ex
is provided with apertures for receiving the
tending flange located on its outer surface 2|
spring supporting pins 6|, 62. It is also pro
at a point slightly spaced fromrthe jaw support
ing housing 28, and adapted to engage the end vided with an aperture for receiving the pivot
of the paper roll I3. This ñange determines the pin 63 for a plurality of pawls 64-51. The pins
6|-63 may have a sliding ñt in the bores in
position of the jaws in the core I6 of the paper
the flange 56, and also a sliding fit in similarly
roll.
located bores in the flange 33 of the housing
The retaining flange 20 may comprise an in
tegral radially and outwardly projecting flange, member 28.
Flanges 56 (Fig. 7) and 33 and 34 (Fig. 8) are
having a straight outer edge 29, and provided at
each provided with the through bore 68 to per
each end with a thickened column 30. The
mit passage of the cylindrical end 69 (Fig. 5)
thickened column portions 30 are of such thick
ness that they ñt within the grooves 3|, which of the chuck releasing tool from either side of
the chuck head, although the tool can only be
are formed in the jaw supporting housing.
The jaw supporting housing 28 comprises a inserted from the left of Fig. 1 when a roll is on
part of the chuck head 32. It is a cast metal the chuck. 'I'he action of this tool will be de
scribed in detail later.
member of annular shape, having two flat annu
Each of the pawl members 64-61 is of the
lar end walls 33, 34 joined by a fru'sto-conical
side Wall 35. The end wall 33 has a bore 36 which same shape, but the pawls are successively long
is of sufficient size to pass the camming member 31
(Fig. 7) to facilitate assembly with that part.
The end wall 34 has a larger bore 38, the size of
these bores differing by an amount which is equal
to the largest thickness at the point 25 of a jaw
24. Between the annular end walls 33 and 34
70 there is located rthe groove 3|, this groove being
divided intothree separate pockets 3| by the
equally spaced partitions 39.
The retaining ñanges 20, with their enlarged
portions 39, are adapted to fit in the grooves or
754 sockets 3|, radial movement being permitted, the
40
45
50
55
60
er, as shown in Fig. 3. Each pawl comprises a
steel member which is provided with an in~ 65
wardly projecting tooth 69 at one end, a bear
ing aperture 10 between its ends, and with a
grooved tail 1| at the opposite end. The groove
in the tail 1| is located on the inner side in Fig.
3, as shown by the dotted lines at 12, and is 70
adapted to receive one end of the longer arm 13
of a spring 14.
The pawls are pivotally mounted on the pin
63 for engagement with the teeth 15 of a ratchet
sector 16. Only one pawl actually engages a 75
.2,"11'1 61.2.4.3
tooth at one time, but the pawls being of _suc
cessive length, all within ‘the spacing between
two teeth, it `will be observed "that the .sector 1,6
may be engaged >by any one of <the four pawls,
depending on its position, and thus the iincre
ments of movement and points of `securlement of
the sector 16 are varied by extremely ¿small
4member' :(H, providing another bearing for the
spaces, differing only by the ¿difference in length
¿mentary shape.
of the pawls 641-61.
.'.Iîhe ratchet tooth sector 16 comprises a curved
member, Eh'aving a radially, inwardly extending .10
lug :94, which extends ¿into bore 95 in the tubular
member 31. Lug 84 is adapted to bear the major
,
Each of the springs 14 comprises a relatively
long arm 13, a coiled portion 11 Ycoiled about the
pin 6|, .and afshort arm 18 engaged outside `of
the pin 62.
The springs are placed under such tension `that
they pivot the pawls in a counter-clockwise ,dí-rection in Fig. 3, to urge them into r`engagement
with the ratchet sector 16. They may :be ¿moved
out of engagement with the tooth ;15 of the
ratchet sector 15 by the camming action of the
20 frusto-conical end 19 of 'the tool 55 when thrust
into the bore 68, from either end of the head.
The tool is. to be inserted in Fig. 43, the cylin
drical portion 69 engaging the tails 1-I of all
10
of the pawls `(i4-«61, and holding `them out of
engagement.' `This shows the _action of the tool
in releasing the pawls from the ratchet sector so
that the clutch may be released when the tool
is removed, the pawls `automatically engaging
the teeth.
30
3
Referring to Fig. ’1, the chuck is provided with
a camming member .31, comprising a substantial
ly cylindrical `or tubular cast metal member which
is provided with a multiplicity of integral cam
ming formations 88. The camslßß are merely ribs
or thickened portions on the cylindrical wallof
the tube 31, and it will ‘be observed that at the
cams 88 this wall increases in thickness in a
clockwise direction in Fig. "1.
‘
The cams 88 are preferably 'located `at equally
spaced points along the length ofthe tubular
member 31 and arranged at equally spaced points
about its periphery. In the present oase, where
three jaws are used, three series of cams 80 `are
equally spaced about the periphery of the vcam
. ming member 31 and located to engage the jaws
l1-I9. The endmost cam 80 is provided with a
tapered surface 8! to facilitate the »insertion of`
this camming member through the `bore in the
housing member 32.
The camming member 31 is provided with a
cylindrical bearing flange 82 at its left end (Fig.
7). the bearing ñange 82 fitting within the bore
36 (Fig. 8) for rotatable support of the camming
member in the housing. The camming member
5.5 is also provided with an enlargement or head 83,
which has a radially extending body 84 provided
head 83 of the camming member 31.
.'ïëîleadfßB ofthe camming member 31' is provided
with ,aperipherally extending groove `93 (Fig. 2),
,which `extends over approximately one-third of
the 'periphery of the head, `and which is adapted
.torreeeive ¿the ratchet tooth sector 1.6 of comple
portion of the load on the ratchet tooth sector
16, and positively prevents rotation of this sector
with respect ¿to the camming member 31, but the
ratchet member is secured in place by a plurality
of through 4screw bolts ‘95, which are threaded
into the flange 9|.
`>The method of assembly of the parts is as fol
lows: The tool 55 may have its end 89 inserted in 20
the bore 68 of the housing member 4i, and the
pawl members 54--81 may then be assembled on
this housing member, with the springs and pins.
The vthree jaw members |1-i9 may be inserted
with their fiangesLZil in the sockets 3l of the hous
ing member or .collar '28. The camming member
31 may then be inserted between the jaws i1--l9
and ,rotated until the lugs 81, 88 are located in the
groove 42. The housing members 4l and 32 may
then be placed together, with the bores that re
30
ceive the screw vbolts Si! in registry, and they may
be secured together by the screw bolts.
Thereafter the tool 55 may be removed to per
mit the pawls Sil-51 to come» into engagement
35
with the ratchet sector.
The use and operation of the chucks is de
scribed as follows: The shaft I2 is inserted
through the core I5 of a roll of paper, `with a
chuck HJ, lil at each end of the roll.
The jaws
i 1_19 of each chuck are inserted into the core 40
I6 until the liange 21 engages the end of the
core, and the collar 45 or" each chuck is secured
in place by the threaded member 5 I, which draws
the legs 49, 5i) of the collar together and clamps
the collar on the shaft in the position of Fig. 1. 45
The roll lf3 is then secured on the shaft by means
of the chucks, as follows:
A bar 43 is inserted in its socket 85, and the
camming member 31 is rotated by moving the
bar downward in Fig. '1; that is, in such direction 50
as to rotate the cams 88 counter-clockwise in
Fig. '7. `The thickened portions of the cams 80
come into engagement with the thickened por
tions 25 of the jaws I1-I8 simultaneously, and
effectively spread the jaws i'l--i'â into engage
ment with the core HS. As the camming member
with an aperture 85 that is rectangular in cross 31 is rotated, the pawls läd-«81 are constantly
section so asto receive the rectangular bar 43. urged toward the teeth 15, and one of the pawls
The rectangular bar 43 may be of considerable is always in position to engage one of the teeth'.
69 length, as, for example, 12 to 18 inches, so as to The camming member 31 will be held by the
permit considerable force to be applied to the pawls 64 in substantially the position to which
rotation of the camming member 31. Lug 84 is it is moved, with only a minimum` amount of
provided with a pair of outwardly projecting lugs back movement or backlash, amounting to the
81 and 88, which are of the same thickness as difference in length between successive pawls
the bar 43, and which are adapted to project ` (54»7-61. The roll having once been aligned with
6,5 between
the press or other mechanism with which it is
the edges 58 and 40 of the cut-out por
tions of the housing. Camming member I31 is being -used by location of the chuck lil, it cannot
provided with a cylindrical bore 8S for receiving get out of alignment by any action of the chucks
the shaft l2, and this bore is split by a slot 90, because the chucks merely spread their jaws
70 which extends throughout the effective length of radially and do not slide longitudinally of the
the tubular member 31. The bore 89 communi» roll.
cates with a counterbore 86 at the end flange 9i
Both chucks are identical in construction, and
of the camming member, and counterbore 86` is there is no possibility of wrong assembly of the
adapted toy receive an inwardly projecting cylin
chucks with the shaft, and since there are no
drical bearing flange 92„ carried by the housing threaded members which can be‘loosened by ro
55
60
65
70
'
4
2,116,243
tation of the shaft, the securement of the roll by
the chucks is assured at all times.
The chucks do not depend solely on the collars
46 for their securement to the shaft because this
securement is augmented by the spreading action
of the cams Sii and jaws ll-ES, which acts on
the split sleeve 31 to compress that sleeve into
closer engagement with the shaft l2. The chuck
thus has the complete length and full internal
10 area of the sleeve 3l, as well as the collar 46, for
frictional engagement with the shaft l2 to secure
each chuck to the shaft.
v
tions on their inner surfaces whereby rotation of
said sleeve spreads said jaws into engagement
with a member to be fastened to a shaft, said
head having inwardly open, curved sockets, and
said jaws having outwardly extending iianges for
engagement in said sockets.
3; In a chuck for ksecuring paper rolls or the
like to a shaft, the combination of an annular
head provided with a bore extending through the
same, a sleeve rotatably mounted in said bore
and having peripherally extending camming
The securement of the chuck to the paper roll
effectively secures the chuck more tightly to the
15 shaft. After the roll has been secured by means
of a chuck at each end, the bar 43 is, of course,
removed. The chuck may be released at any time
by merely forcing the conical end 'i9 of the tool 55
into the bore S8. The conical end 'i9 cams the
pawls 64-67 out of engagement with the sector
'i6 and releases the chuck. This may be made
easier by inserting the bar ‘i3 and relieving the
pressure on the teeth at the same time the tool
55 is inserted. The insertion of the tool 55, how
25 ever, permits the camming sleeve 3l' to be rotated
to released position at once so that the chucks
means on its outer surface, and a plurality of
jaws having parts thereof expansively mounted
in said head, said jaws having camming forma 15
tions on their inner surfaces whereby rotation
of said sleeve spreads said jaws into engagement
with a member to be fastened to a shaft, said
sleeve being provided with ratchet teeth adja
cent said head, and pawl means in said head for 20
securing said sleeve in any of a plurality of ro
tative positions.
4. In a chuck for securing paper rolls or the
like to a shaft, the combination of an annular
head provided with a bore extending through the 26
same, a sleeve rotatably mounted in said bore
immediately release the roll.
It will thus be observed that I have invented
and having peripherally extending camming
a ne-w chuck for use in securing paper rolls or
having parts thereof expansively mounted in said
head, said jaws having camming formations on 30
their inner surfaces whereby rotation of said
30 the like to a shaft.
The present chuck is quick and positive in its
action and, as stated before, it is not loosened by
any rotation of the shaft. Its parts comprise
castings which require a minimum amount of ma
35 chining, and it may, therefore, be constructed at
a very low cost.
The chuck facilitates the align
by the chuck does not change the alignment of
the roll.
`
While I have illustrated a preferred embodi
ment of my invention, many modifications may
be made without departing from the spirit of the
invention, and I do not wish to be limited to the
45 precise details of construction set forth, but de
sire to avail myself of all changes within the
scope of the appended claims.
Having thus described my invention, what I
claim as new and desire to secure by Letters Pat
50 end of the United States, is:
l. In a chuck for securing a hollow member to
a shaft, the combination of a supporting head
with a rotatable camming sleeve adapted to be
mounted on the shaft, a plurality of jaws extend
55 ing longitudinally of the -shaft and locatedtout
side of said sleeve, said jaws and sleeve compris
ing camming means operating between said jaws
and said sleeve by the rotation of said sleeve for
spreading said jaws into engagement with a hol
60 low member to be secured to the shaft, pawl >and
ratchet means carried by said head and sleeve
for securing said sleeve in any of a plurality of
predetermined rotative positions, and means for
slidably engaging said pawl means to release said
65 pawls from the ratchet and effect a release of
the chuck, said latter means comprising a tool
having a camming end adapted to be inserted
in a bore in said head.
2. In a. chuck for securing paper rolls or the
70 like to a shaft, the combination of an annular
head provided with a bore extending through the
same, a sleeve rotatably mounted in said bore
and having peripherally extending camming
means on its outer surface, and a plurality of
jaws having parts thereof expansively mounted
means on its outer surface, a plurality of jaws
sleeve spreads said jaws into engagement with a
member to be fastened to a shaft, said sleeve
being provided with ratchet teeth adjacent said
head, and pawl means in said head for securing 35
said sleeve in any of a plurality of rotative po
ment and securement of the roll in proper posi
tion, and the action of securing the paper roll
40
in said head, said jaws having camming forma
'
sitions, said pawl means comprising a plurality
of separately movable pawls having engaging
teeth located within the space between two ad
jacent ratchet teeth.
5. In'a. chuck for securing paper rolls or the
like to a shaft, the combination of an annular
40
head provided with a bore extending through
the same, a sleeve rotatably mounted in said bore
and having peripherally extending camming 45
means on its outer surface, a plurality of jaws
having parts thereof expansively mounted in said
head, said jaws having camming formations on
their inner surfaces whereby rotation of said
sleeve spreads said'jaws into engagement with a
member to be fastened to a shaft, said sleeve 60
being provided with ratchet teeth adjacent said
head, and pawl means in said head for securing
said sleeve in any of a plurality of rotative po
sitions, said >head having a transverse bore lo
cate-d adjacent the pawls, and means slidably 55
mounted in said bore for moving the pawls out
of Aengagement with the adjacent ratchet teeth.
6. In'a chuck for securing paper rolls or the
like to a shaft, the combination of a supporting
head adapted to be iixedly secured to a shaft, 60
with a split sleeve adapted to be rotatably mount
ed on said shaft and rotatably mounted with
respect to said head, said sleeve having a plu
rality of cams and being provided with parts
adapted to clamp the shaft, a plurality of jaws 65
having parts thereof movably mounted on said
head for engaging the interior of a paper roll,
and means for rotating said sleeve, whereby said
jaws are expanded to engage the paper roll and 70
the sleeve is contracted to engage the shaft, a
ratchet carried by said sleeve, said sleeve hav
ing means for securing it selectively to the head
in any of a plurality of adjusted positions, com
prising a multiplicity of pawls located with their 75
54
2,116,243
engaging shoulders at increments of distance
from each other which are less than the dis
tance between the teeth of the ratchet.
7. In a chuckfcr securing paper rolls or the
like to a shaft, the combination of a supporting
head, said head having an inwardly open an
nular groove and having aV sleeve rotatably
mounted on said head, with a plurality of curved
jaws extending longitudinally of said sleeve and
exterior` thereof, said curved jaws having flanges
slidably mounted in said annular groove, said
groove and flanges being of sufficient size to per
mit radial movement of said jaws, camming
formations on said jaws and sleeve increasing in
15 size in a peripheral direction, whereby when the
sleeve is rotated the jaws will be expanded to
engage the paper roll, and means for securing
the sleeve in predetermined position with re
spect to the head, comprising a ratchet carried
20 by said sleeve and a pawl carried by said head,
25
nular groove and ` having a sleeve rotatably
mounted on said head,rwith a plurality of curved
jaws extending longitudinally of said sleeve and 5
exterior thereof, said curved jaws having flanges
slidably mounted in said annular groove, said
groove and flanges being of sufficient size to per
mit radial movement of said jaws, camming
formations on said jaws and sleeve increasing in 10
size Vin a peripheral direction, whereby when
the sleeve is rotated the jaws will be expanded
to engage the paper roll, and means for securing
the sleeve in predetermined position with re
spect to the head, comprising a ratchet carried
by said sleeve and a pawl carried by said head,
said sleeve having a slot extending over the ma
jor portion of its length, whereby the sleeve may
be urged into closer engagement with‘the shaft
by the action of the camming means, said sleeve 20
said sleeve having a slot extending over the ma
having a radially extending lug provided with
jor portion of its length, whereby the sleeve may
be urged into closer engagement with the shaft
socket for rotating said sleeve.
a handle socket and an elongated handle in said
by the action of the camming means.
8. In a chuck for securing paper rolls or the
like to a shaft, the combination of a supporting
head, said head having an inwardly open annular
groove and having a sleeve rotatably mounted
on said head, with a plurality of curved jaws ex
tending longitudinally of said sleeve and ex
10. In a chuck for securing- paper rolls or the
like to a shaft, the combination of a supporting 25
head, said head having an inwardly open annu
lar groove and having a sleeve Vrotatably mount
ed on said head, with a plurality of curved jaws
extending longitudinally of said sleeve and ex->
terior thereof, said curved jaws having flanges
slidably mounted in said annular groove, said
groove and flanges being of sufficient size to per
mit radial movement of said jaws, camming
formations on said jaws and sleeve increasing
in size in a peripheral direction, whereby when
the sleeve is rotated the jaws will be expanded
to engage the paper roll, and means for securing
the sleeve in predetermined position with re
spect to the head, comprising a ratchet car
ried by said sleeve and a pawl carried by said 40
head, said sleeve having a slot extending over the
slidably `mounted in said annular groove,- said
groove and ñanges being of suiiicient size to per
mit radial movement of said jaws, camming
35 formations on said jaws and sleeve increasing in
size in a peripheral direction, whereby whenthe
sleeve is rotated the jaws will be expanded to en
gage the paper roll, and means for securing the
sleeve in predetermined position with respect to
40 the head, comprising a ratchet carried by saidV
sleeve and a pawl carried by said head, said
'sleeve having a slot extending over the major
portion of its length, whereby the sleeve may be
urged into closer engagement with the shaft by
45 the action of the camming means, said head com-`
prising a pair of circular parts, and said sleeve
having an annular portion projecting radially
therefrom secured between said parts for rotative
50
like to a shaft, the combination of a supporting
head», said head having an inwardly open an
movement.
9. In a chuck for securing paper rolls or the
terior thereof, said curved jaws having iianges
major portion of its length, whereby the sleeve
may be urged into closer engagement with the
shaft bythe action of the camming means, said
head having a shaft-engaging collar provided 45
with split ends, and threaded means for drawing
said split ends together to clamp said head to said
shaft.
RAY W. JOHNSON.
50
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