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Патент USA US2505031

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April 25, 1950
G. HJCOTE
2,505,030
RELEASING TOOLHOLDER
Filed July 29, 1944
2 Sheets-Sheet l
.
14
174.91 28
2001/
18
25b
i5
‘5
23 6m
29
24 {gm/16b INVENTOR
g5 24 2M22161:) I6
Gem: e H. C’ote
-
BY
Yaw-r
ATTORNEYS
l2
April 25, 1950 _
2,505,030
G. H. COTE
‘ RELEASING TOOLHOLDER
Filed July 29, ‘1944
2 Sheets-Sheet 2
INVENTOR
George H. Coz‘e
BY
,
'
,
.
WY
ATTORNEYS
‘
Patented Apr. 25, 1950
2,505,030
'UNITED STATES PATENT OFFICE
‘
r
2,505,030
RELEASING TOOLHOLDER
George H. (Date, Bridgeport, Conn.
Application July 29, 1944, Serial No. 547,257
14 Claims. (Cl. 10-86)
v2
1
matic screw machines, turret lathes and the like,
and more particularly to holders of ‘the releasing
on initial disengagement of the clutch teeth by
the relative advance of the carrier part the cou
pling member is moved from its advanced posi
‘type.
tion to a retracted centralized position as deter
UThis invention relates to tool holders for auto- I
.
"
‘
'
Various means have been employed heretofore
to prevent excessive wear and abrasion of the co
mined by the camming surfaces, to cause further
separation of the clucth teeth.
engaging clutch surfaces in releasing-type
A feature of the invention resides in the struc
ture and arrangement of the various component
parts whereby a compact construction is attained
vanced and ‘spring-retracted coupling member
which has clutch ‘teeth providing a driving con 10 making possible a reversible releasing holder of
small size.
_
nection between the mounting and the tool-car
Other ‘features and advantages will hereinafter
rying parts of the holder,’ this member being so
arranged that when the carrier part is axially ad
In the accompanying drawings showing an em
vanced relative to the mounting part by the
holders, one‘such means employing a cam-ad
appear.
threading operation to the point of release from
,
i
15 bodiment of the invention:
.
,
Figure 1 is an axial sectional view showing the
the latter, the co-engaging" clutch surfaces are
improved tool holder with a right-hand tap be
fore starting a cut.
>
amount by a retractingmovement of the mem
Fig. 2 is a fragmentary axial section on the line
her so that they do‘ not strike each other during
the ensuing rotation of the tool carrier part. 20 2—2 of Fig. 1, with the clutch parts in elevation.
Fig. 3 is a section similar to that of Fig. 2, but
‘This construction-generally operates satisfac
showing the clutch parts after they have moved
torily toreduce the amount of wear of the clutch
to driving position, at the beginning of the cut
‘surfaces, but has a disadvantage in that it re
ting operation.
quires disassembly of the holder when a reverse
Fig. 4 is a similar section, but showing the
thread is to be cut, that is, when a change is ‘to
clutch parts'at the instant of separation. '
be made from right hand to left hand threads vor
, Fig. 5 is a similar section, showing the in
vice versa. In order to make this change in these
creased separation of the clutch surfaces after
prior devices, the coupling member must be re
their initial separation, and after the shell of the
moved’ and reversed in‘its position in the holder,
thereby reversing the action of the camming 30 holder has begun to turn.
Fig. 6 is a fragmentary transverse sectional
teeth associated with the member.
view taken on the line 6--6 of Fig. 1, showing
An object of the present invention is to provide
the ratchet mechanism of the holder.
a releasingtool holder having means for causing
‘immediately further separated a substantial
I Fig. '7 is an end'elevation of the body or sup
‘ a ‘substantial separation of the clutch teeth,
wherein itiis not necessary to alter or repositionv 35 porting boss of the holder, illustrating the clutch
any of the component parts of the clutch mecha
nism in order to change from right hand to left
hand‘threadingQand vice versa.
‘
teeth.
‘
Fig.‘ 8 is a face view of the coupling ring, show
ing-the clutch teeth.
Fig. 9 is an opposite face view of the coupling
. -
v‘This ‘is ‘accomplished by. the provision of a
novel coupling member and. cooperating struc-. 40 ring, showing the camming teeth.
'
Fig. 10 is a face view of the camming disk car
“ture therefor having oppositely directed camming
surfaces for advancing the member which are so
ried by the shell of the holder, and
arranged as to be operative respectively without
' Fig. 11 is an opposite face view of the camming
disk, showing the lugs by which it is keyed to
ing of the, tool carrier. Thus, if a right hand 45 the shell.
‘ As shown in Fig. 1, the releasing tool holder of
thread is being cut, one set of camming surfaces
this invention comprises a shank [0 extending
‘functions to advance the member to the point
. into a turret or other supporting machine struc
Wherev the clutch teeth thereof are initially fully
ture II and held therein by a set screw l2. For
“meshed with those of‘ the mounting part of the
holder preparatory to the driving or thread cut 50 conveniently initially aligning the tool and tool
carrier of the holder with the work, the shank I0
ting operation‘, and if a'left hand thread isbeing
has a two-cared ?ange l3 cooperating witha
cut the. other set’ ofcamming surfaces becomes
similar ?ange l4 carrying the releasing and tool
,operativeto' advance the coupling member and
carrying mechanism of the holder, each of vthe
cause full engagement of. the clutch teeth. Upon
‘repositioning for either forward or reverse driv
~completion of the desired thread cutting and up
55
“?anges having alignedapertures receiving screws
2,605,030
I5, the apertures in the ?ange I 4 being su?l
ciently large to permit adjustable relative posi
tioning of the ?anges.
The ?ange I 4 is provided with a supporting boss
or body I6 extending laterally thereof and fas
tened thereto by a neck portion I6a pressed into
a central aperture in the ?ange and welded, as
shown at H.
A tool carrier or shell I8 is provided having
a chuck IS'shown .carrying a right-hand tap 20
engaging a workpiece 20a, the shell I8 having a
bore 2| receiving the body It of the holder. The
body I6 and shell I8 are cylindrical so that the
4
stud 21 between the washer 3| and the collar
29 to prevent possible shifting of the latter.
According to this construction, the coupling
ring 23 provides a positive driving connection
between the body It and the shell I8 by func
tioning in the following manner: Considering
Figs. 1 and 2, if a torque were to be applied to
the shell in either direction, the latter would turn
a predetermined amount, which would cause the
clutch teeth 16b and 22 to become engaged, and
also cause one of the sets of camming surfaces
23a, 23b, depending on the direction of turning,
"to engage the camming lugs 24. This latter would
latter when necessary may rotate about the body.
In threading operations performed with taps,
cause the ring 23 to move axially away from the
dies or other thread cutters held in :a tool holder
of the clutch teeth I61) and 22. This may be seen
’ in .Fig. .3. The amount of separation would be
of the present releasing type,tlie .cuttingtool 20
disk 25, resulting in a more complete meshing
is applied to the work 20a, which latter is being
limited, however, by engagement of the ring with
rotated in the machine‘so that a thread-may be
the collar 29, this occurring before the camming
cut therein. The tool holder is advanced vduring 20 surfaces could entirely disengage each other,
the thread cutting operation by the turret H ‘of
so that the ring'23 would be thereby locked to the
the machine, the chuck I9. and the-tool 20 being
disk 25, and the shell I8. If accidentally the
held against turning by clutch means connected
torque should be removed from the shell IS, the
to the mounting part of the holder. ‘At .a point
coil spring 28 would merely return the ring 23
~.immediately priorrto completion of the thread 25 to the position of Fig. l, returning the shell I8
cutting, the turret I-I ceasesyto advanceand the
substantially to its initial rotation position. It
remainder of the cutting operation causes the
will be noted that, due to the disposition of the
chuck I9 and shell I8 to advancerelative-to the
camming surfaces of the disk 25 and ring 23, the
body 86 to a point wheretheclutch'means is re
action above described would take place regard
leased to permit rotation of the chuck with the 30 less of whether the applied torque were clockwise
work. The clutch, after initial separation of the
or counterclockwise.
teeth thereof, operates to cause a further separa
For cooperating with the clutch mechanism de—
tion of these to prevent them from striking during
scribed above, to provide for control of the chuck
.the rotation of the shell I8. thereby preventing
I9 and shell I8 during operation of the tool
excessive wear.
~
holder, to be described shortly, a ratchet is pro
According to the present invention, the‘clutch
vided which is adapted to lock the shell against
.is‘so constructed that, without disassembly or
turningin one-selected direction and only at a
repositioning of its parts, it will operate to provide
single rotative position. Refer-ring to Fig. 6, this
a positive driving connection, and subsequently a
ratchet'comprises a ball 33 carried in either of
substantial separation between the ‘co-engaging 40 two recesses 34 or 35 in the body I6, the ball be
teeth regardless of whether the holder is being
ing urged outwardly by a coil spring 36 so as to
used to out left hand or right hand threads.
engage a groove 3'! in the bore ZI of the shell
For this purpose the end portion of the body
when the latter is turning on the body I6. If
It is provided with a pair of oppositely disposed
the ball 33 is in therecess 34 it will permit clock
segmental clutch teeth I'Iib cooperating with seg
wise rotation of the shell but prevent counter
mentalteeth 2'2 onone face of a coupling ring .23
clockwise rotation, the action of the ball being
carried Within the shell I 8 adjacent the end of
vreversed if it is in the recess 35. The groove 31
the body IS. The opposite'face of the ring 23 is
extends axially of the shell I8 a sui?cient extent
recessed to provide pairs of camming surfaces
to permit operation of the ball 33 as described,
23a and 2312 respectively circularly oppositely di
during axial movement of the shell relatively to
rected, cooperating with cam-shaped projections
M on the‘ face of a disk 25' mounted in'the shell
I8. The disk 23 is preferably made demountable
as shown, by the provision of a groove 25a in its
periphery, into which extend set screws 18a
threaded in the shell I8, and the latter and-disk
are keyed together by lugs 25b of the disk, which
extend into an elongate recess I'Bb :in the shell.
the body
I6.
~ ‘
In operation, the releasing holder is normally
in the position shown in Figs. 1 and 2, wherein
the clutch-teeth 22 and I6b are partially meshed.
'At the instant that the rotating work 20a en
gages the tap 20 a torque will be applied to the
shell I8 and disk 25, and transmitted through
the coupling ring 23 ‘to the body I6. This torque,
The ring .23 is slidably mounted on a shouldered
as already explained, operates the camming sur
portion 26 of a stud 21, one end 2111 of which ex 60 faces between the disk 25 and the ring 23 so that
tends through the disk ‘25, and is welded thereto
the latter is extended or separated from the disk
as shown, the ring being yieldably held against
until it engages the collar 29; In so doing, the
the disk by a conical compression spring 28 en
clutch teeth 22 and I6b become fully meshed,
gaging a collar 29 which may be press ?tted on
Fig. 3, and engage each other so that further
the stud.
.
65 turning of the shell I8 on the body It is pre
Positioning of the shell I 8, of the holder on
vented. A positive drive is now effected between
the body It is accomplished by engagement of
the body and shell and, as the tap 20 progresses
the adjacent surfaces of the collar 29 and body,
in cutting the work 20a, a point is reached where
as shown in Fig. 1, and for the purpose of yield
advance of the turret II is halted. Further
ably holding the shell in this retracted position
shown the body is provided with a counterbore
thread cutting will cause the chuck I9 and shell
I8 to advance now with respect to the body I 6,
I6c receiving a helical compression spring 30,
thereby causing separation of the clutch teeth
the outer end'of which engages a washer 3! se
22 and IE1). At the instant of this separation,
I’ cured to the threaded end 211; of the stud by
as shown in Fig. 4, the ring 23 is freed so that
- a nut 32. A spaced sleeve 21:: is carried on the 75 the spring 28 will move it axially into engage—
‘52,605,030
5
ment withv the‘ disk 25,1'as shown in ‘Fig. ,5, fur
v'therisep‘arating the‘ cIutch‘YteethZW The 'tap» 20,
:chuck Iii-and shell IIB, being now. freed‘ from the
body-"16,‘ will‘ rotate-with the work, this rotation
being permitted by the ball 33 due to its func
tioning as a ratchet.: The‘ machine now causes
the workpiece?ilwto reverse its rotation. How
ever, reverse turning of the chuck i9 and shell» [8
:is prevented ata predetermined rotative position
:on-the body~l6 by engagement of the ball 33 with
one Wall of the groove 31, so that the tap 20 be
l'comes‘pnthreaded from the work. When the
‘extended positions with respect to the other part;
imeans'keying the coupling to‘ the said one part so
as ‘to cause a driving force on the coupling in
either of'opposite directions to ?rst move the
coupling to extended position and then lock the
coupling to ' said one part; separable cooper
ating “clutch teeth on the coupling and said
other part, interlocking when the coupling
is in extended position and the said parts
are in a predetermined relative axial posi
tion, to provide-a rotary drive between the parts,
in'eithe'r direction, the mounting for the cou
‘pling enabling it to be retracted from said ex
tended‘position in a direction separating the said
'30Jof‘the. holderiwill return=the shell 18 to the
‘position shown in Figs‘. 1 and 2, wherein the 15 teeth after the tool carrying part has ?rst been
"forced? axially from the said predetermined rela
vclutch‘teethvare partially meshed, sincefthe ro
tive position to initially disengage the teeth and
itative position in which the shell is locked by
relieve the driving force On the coupling; and
the ball 33 is such that the clutch teeth 16b and
yieldable‘ means for moving and holding the cou
22 will be properly aligned for re-engagement.
If at any time it should be desired to replace 20 pling in retracted position so that upon said ini
tial’disengage’ment of the clutch teeth the cou
the-right-hand :tap ‘20 with a left-hand tap, the
pling will be automatically retracted to further
releasing holder of this invention may be con
separate said teeth.
'
veniently- adapted for reverse threading opera
3. A device of the type described having a
tion-in the following manner: The nut 32 carried
by-the stud 21 is loosened an extent but not re 25 mounting part, a tool carrying part, and means
mounting‘ the tool carrying part for rotation and
moved from the stud. This permits the shell l8
axial movement with respect to the mounting
to- be- pulled outwardly on the boss 16 su?iciently
part, one of said parts having a coupling mount
to‘ expose the ratchet ball 33. The latter and the
workpiece ?nally‘ releases the tap‘, the coil spring
spring 36 are then transferred to the opposite re
cess 35in the boss, and the shell is moved back
to.‘ its.’ initial position. The nut 32 is now tight
ened, whereupon the tool is ready for use with
‘left-handthreading tools. In operation, the cou
pling-‘ring. 23 functions in a manner similar to
that described in connection with the right-hand ;
tap wZlhbut of course in a reverse direction.‘ It
will be noted that by this construction it is not
necessary to ‘disassemble the driving clutch of
‘the releasing tool holder, but merely necessary to
loosen one nut and reposition the ratchet mech
anism.
‘
_
v
‘ ‘7 Variations and modi?cations may be made
within the scope of this invention and portions
'ofgthe' improvements used without others.
‘ I claim:
1. A device of the type described having a
mountingpart, a tool carrying part, and means
mounting the tool carrying part for rotation and
axial vmovement with respect to the mounting
part, one of said parts having a coupling mount
ed thereon for movement between retracted and
extended positions with respect to the other part;
means keying the coupling to the said one part
so as‘ to cause a driving force on the coupling in
either of opposite directions to ?rst move the ‘
coupling to extended position and then lock the
coupling to said one part; and separable cooper
ating' clutch 'teeth on the coupling and said other
ed thereon for movement between retracted and
extended position with respect to the other part;
means keying the coupling to the said one part so
as to cause a driving force on the coupling in
either of'opposite directions to ?rst move‘the
coupling to extended position and then lock the
coupling to said one part; separable cooperat
ing‘ clutch teeth on the coupling and said other
part, interlocking when the coupling is in ex
tended position and the said parts are in a pre
determined relative axial position, _to provide a
rotary drive between the parts in either direce
tion, the mounting for the coupling enabling it
to be retracted from said extended position in
a direction separating the said teeth after the
tool ‘carrying part has ?rst been forced axially
from the said predetermined relative position to
initially disengage the teeth and relieve the driv
ing force on the coupling; astop, and spring
means, {yieldably holding the mounting and tool
carrying parts in said predetermined axial posi
tion; and a ratchet unidirectionally locking the
tool carrying part at a predetermined rotative
position with respect to the mounting part, Said
position being such that the separable clutch
teeth are positioned for meshing, so that after
said disengagement of the teeth has taken place
'andi'upon‘ removal of‘the axial force from the
tool carrying part the latter will be returned by
the said spring means to its predetermined axial
position.
‘
‘
part, interlocking when the coupling is in ex
A.
A
device
of the type described having a
60
tended position and the said parts are in a pre
mounting body and a-itool carrying part rotat
determined relative axial position, to provide a
ably and axially movable on the body; a stop
rotary " drive‘between the parts in either direc
carried by ‘the tool; carrying part and locating
tion, the mounting for the coupling“ enabling it
the tool carrying part in a predetermined axial
torbe retracted'irom said extended position vin a
direction‘separating thesaid teeth afterthe't‘ool 65 position on said body; a-coupling part rotatably
and axially movable with respect to the tool
carrying part has ?rst been force‘d'axially from
carrying part and located‘ adjacent said body,
the saidpredetermined-relative: position to ini
the latter and the coupling part having par
tially disengage‘ the teeth and relieve the driving
tially, meshing separable clutch teeth for lock—
force on the coupling.
ingitheibody and coupling part‘ against free rel
»2. A device of the type .described having a
ative rotative movement in either direction; ‘ co-'
mounting part, a tool carrying part, and means
mounting the tool carrying part for rotation and
axial movement with;,.respect to thei'mounti‘ng
part,one_ of_ said parts having a coupling mount;
ed thereon Ior movement between retracted‘ and 75.
operating-cams on the coupling and tool carry
ing parts, comprising a projection on one of said
par-ts‘having'oppositely sloping walls, and a recess
inrtheiother part having respectively cooperat
2,605,030
ring walls whereby relative rotative movement'of
the parts in either direction causes relative axial
movement so as tomore fully mesh the said clutch
teeth; stop means connected to the tool carry
ing part and limiting said axial movement and
holding the said coupling and tool carrying parts
‘against further relative rotative movement so
that the tool carrying part is thereby held by
the clutch teeth against free turning on the
body; and means yieldably holding the coupling
and tool carrying parts against relative axial
movement whereby after they have been so moved
in response to relative turning and when the
tool carrying part is axially moved from said
predetermined position so as to cause initial sep
of ‘said limits when ‘a turning force ‘in one direc
tion or the other respectively is applied to the
tool carrying part and the clutch teeth are in
full meshing engagement; and means automat
ically moving the coupling member to its inter
mediate position wherein its teeth are retracted,
when the tool carrying part has been shifted axi
ally out of its predetermined relative axial posi
tion an extent su?icient to initially separate the
meshed clutch teeth, thereby to further separate
the teeth.
'7. A device of
mounting body;
axially movable
15 mounted on the
the type described having a
a tool carrier rotatably and
thereon; a coupling member
carrier and rotatable thereon
aration of the clutch teeth, the coupling part
between limits and movable thereon from a re
Will be automatically axially moved so as to fur
tracted to an extended position and vice versa
ther separate said teeth.
with respect to the carrier; means connected to
5. A device of the type described having a
the coupling member and carrier and advancing
mounting body and a tool carrying part includ 20 the coupling member from the retracted to an
ing a shell enclosing a portion of the body, rotat
extended position when it is turned from an in
ably and axially movable thereon; a stop car
termediate rotative ‘position to either of said
ried by the tool carrying part and engaging the
limits in response to application of a turning
body and locating the tool carrying part on the
force, said body and coupling member having
body in a predetermined position; a circular cou
cooperating separable clutch surfaces whereby
pling part rotatably and axially movable in the
when the coupling member is in extended posi
shell adjacent the enclosed portion of the body,
tion and the carrier and body are in a predeter
the latter and the coupling part having partial
mined relative axial position the carrier is locked
ly meshing separable clutch teeth for locking the
by the coupling member against free rotation in
"body and coupling part against free relative 30 either direction on the body, the mounting for
rotative movement in either direction; cooperat
the coupling member enabling it to be retracted
ing cams on the coupling and tool carrying parts,
comprising arprojection on one of said parts hav
ing opposite sloping walls, and a recess in the
other part having respectively cooperating walls
whereby relative rotative movement of the parts
in either direction causes relative axial movement
so as to more fully mesh the said clutch teeth;
stop means connected to the tool carrying part
to limit said relative axial movement and for
holding the tool carrying and coupling parts
against further relative rotative movement, so
that the tool carrying part is thereby held by the
clutch teeth against free turning on the body;
and means yieldably holding the tool carrying
and coupling parts against relative axial move
ment whereby after they have been so moved in
response to relative turning and when the tool
carrying part is axially moved from said prede
termined position so as to cause initial separation .
from‘ said extended position in a direction sepa
rating the said clutch surfaces after the carrier
has ?rst been moved axially vfrom said predeter
mined axial position to initially disengage the
said clutch surfaces and relieve the turning pres
sure on said coupling.
8. A device of
mounting body;
axially movable
mounted on the
the type described having a
a tool carrier rotatably and
thereon; a coupling member
carrier and rotatable thereon
between limits and movable thereon from a re
tracted to an extended position and vice versa
with respect to the carrier; interengaging means
on the coupling member and carrier advancing
the coupling member from the retracted to an
extended position when it is turned from an in
termediate rotative position to either of said
limits in response to application of a turning
force; and yieldable means for moving and for
of the clutch teeth, the coupling part will be auto
holding the coupling member in retracted inter
matically axially moved so as to further separate
mediate rotat-ive position, said body and coupling
said teeth.
member having cooperating separable clutch sur
6. A releasing tool holder comprising a mount
faces whereby when the coupling member is in ex
ing part; a tool carrying part rotatably and axi 55 tended position and the carrier and body are in
ally movable on the mounting part; a coupling
a predetermined relative axial position the car
member having a pair of opposed clutch teeth;
rier is locked by the coupling member against
means movably mounting the coupling member.
free rotation in either direction on the body, the
on one of said parts so as to locate the teeth of
mounting for the coupling member enabling the
the coupling member next to the other part, said 60 said .yieldable means to retract it from its ex
mounting means enabling the coupling member
tended position in a direction separating the said
to be moved from an intermediate position to
clutch surfaces after the carrier has ?rst been
either of two limits wherein at least one of the
moved axially from said predetermined axial po
said clutch teeth are advanced with respect to ,
sition to initially disengage the said clutch sur
the said other part; means engaging and hold— 65 faces and relieve ‘the turning pressure on said
ing together the coupling member and the part
coupling member.
on which it is mounted when the coupling mem
9. A device of the type described having a
ber is in either of said limits; a pair of clutch
mounting body; a shell enclosing a portion of
teeth on the said other part individually en
the body, rotatably and axially movable thereon;
gageable with the individual teeth of the cou 70 a, stop connected with the shell locating the shell
pling member, said engageable teeth fully mesh
on the body in a predetermined position; a mem
ing when the said parts are in a predetermined
ber rotatably and axially movable in the shell
relative axial position and the coupling member
adjacent the enclosed portion of the body, the
is at one of said limits, said coupling member
latter and the \member having partially-mesh
beingvmoved to and held at one or the other
ing separable clutch teeth; cooperating cams on
watat ‘
10
.
axially against the said spring means and out of
said predetermined position to cause initial sepa
movement in either direction causes axial sepa
ration of theclutch teeth, the ring will be auto
rating movement between the member and shell
matically axially moved by the yieldable means
to more fully mesh the said clutch teeth; stop
to further separate said teeth, the shell being
means connected with the shell and engaging
returned to its predetermined position 'by said
the member and limiting said separating move
spring means upon removal of said force,
ment, said cams and stop means holding the shell
12. A device of the type described having a
and member against further relative rotative
centrally bored cylindrical mounting body; a shell
movement, so that the shell is thereby held by
the clutch teeth against free turning‘on the 10 enclosing an end and peripheral portion of the
body,rotatably and axially movable thereon, said
body; and means yieldably holding the member
the member and shell whereby relative rotative
and shell against axial separating movement
shell having chucking means for carrying a
whereby after they have beenso moved in re-'
sponse to relative turning and when the shell is
may be imparted to the tool and shell; a ratchet
thread-cutting tool whereby, turning movements
axially moved from said predetermined position 15 unidirectionally locking the shell against rota
tion at apredetermined rotative position on the
body; a stud fastened to the shell, extending
through the bore of the body; a stop connected
axially moved so as to further separate said
to the shell; spring means engaging the stud and
teeth.
(
10. A device of the type described having a 20 body and yieldably holding the stop on the shell
in engagement with the body in a predetermined
centrally bored cylindrical mounting- body; a
axial position; a ring rotatably and axially mov
shell enclosing an ‘end and peripheral portion of
able on the stud adjacent the inner end of the
the body, rotatably and axially movable thereon;
body, the latter and the ring having partially
a stud fastened to the shell, extending through
the bore of the body; abutment means between 25 meshing separableclutch teeth; cooperating cams
on the ring, and’ shell whereby relative rotative
the stud and body for locating the shell on the
body in a predetermined position; a ring rotat
movement from an vintermediate position in either
ably and axially movable on the stud adjacent
direction‘ causes axial separating movement, be
tween the 'ring and‘shell to more fully mesh the
the inner end of the body, the latter and the ring
having partially-meshing separable clutch teeth; 30 said clutch teeth, the said predetermined rotative
cooperating cams on the ring and shell whereby
position of the shell as controlled by the ratchet
being such that the clutch teeth are positioned
relative rotative movement in either direction
causes axial separating movement between the
for meshing; stop means connected to said shell
ring and shell to more fully mesh the said clutch
and engaging“ the ring, and limiting said separa
teeth; stop means connected with the shell and 35 tion or the ring and shelhsaid cams and stop
engaging the ring and limiting said separating
means holding the‘ same against further relative
movement, said cams and stop means holding
rotative movement, so that the shell is thereby
the shell and ring against further relative rota
held by the clutch teeth against free turning on
the body; and means engaging and yieldably
tive movement, so that the shell is thereby held
by said clutch teeth against free turning on the
holding the ring and shell against axial separat
body; and means for yiedably holding the ring
ing movement whereby after the clutch teeth
and shell against axial separating movement
have been more fully meshed and when force is
so as to cause initial separation of the clutch '
teeth, the said member will be automatically
whereby ‘after the same have been so moved in
exerted on the shell to axially move the same
response to relative turning and when the shell
against the said spring means and cause initial
is axially moved from said predetermined posi 45 separation of the clutch teeth and freeing of the
tion so as to cause initial separation of the clutch
shell for turning, the ring will be automatically
teeth, the ring will be automatically axially
axially moved so as to further separate said teeth,
moved so as to further separate said teeth.
the shell upon the removal of said force and after
11. A device of the type described having a
it has been locked by said ratchet being returned
centrally bored cylindrical mounting body; a 50 by said spring means to its predetermined posi~
shell enclosing an end and peripheral portion uf
tion wherein the clutch teeth mesh.
the body, rotatably and axially movable thereon;
13. A device of the type described having a cen
a stud fastened to the shell, extending through
trally bored cylindrical mounting body; a shell
the bore of the body; a stop connected to the
enclosing an end and peripheral portion of the
shell; spring means engaging the stud and body 55 body, rotatably and axially movable thereon, said
and yieldably holding the stop on the shell in
shell having chucking means for carrying a
engagement with the body in a predetermined
thread-cutting tool whereby turning movements
position; a ring rotatably and axially movable
may be imparted to the tool and shell and having
on the stud adjacent the inner end of the body,
a groove on its inside surface extending partially
the latter and the ring having partially-meshing 60 around the shell; a spring-urged ball movably
separable clutch teeth; cooperating cams on the
mounted in the body to engage the ends of said
ring and shell whereby relative rotative move
groove for unidirectionally locking the shell at a
ment in either direction causes axial’ separating
predetermined rotative postlon; a stud-fastened
movement between the ring and shell to more
to the shell, extending through the bore of the
fully mesh the said clutch teeth; stop means
body; a stop connected to the shell; spring means
connected to said shell and engaging the ring
engaging the stud and body and yieldably holding
and limitng said separating movement, said cams
the stop on the shell in engagement with the body
in a predetermined axial position; a ring rota
and stop means holding the shell and ring
tably and axially movable 0n the stud adjacent
against further relative rotative movement, so
that the shell is thereby held by the clutch 70 the inner end of the body, the latter and the ring
having partially-meshing separable clutch teeth
teeth against free turning on the body; and
for locking the same against free relative rota
means engaging and yieldably holding the ring
tion in either direction; cooperating cams on the
and shell against axial separating movement
ring and shell whereby relative rotative move
whereby after the clutch teeth have been more
fully meshed and the shell is moved under force 75 ment from a predetermined position in either di
11
asceoso
rection causes axial separating movement be
tween the ring and the shell to more fully mesh
the said clutch teeth, the said predetermined r0
tative position of the shell as controlled by the
ball being such that the cooperating clutch teeth
are positioned for meshing; stop means con
12
able.‘ on the stud between’ the‘ disk‘ and the
enclosed portion of the body, the latter and the
ring having partially-meshing separable clutch
teeth for locking the body and ring against free
relative rotative movement in either direction;
cooperating’ cams on the ring and disk whereby
nected to said shell and engaging the ring and
limiting said separating movement of the ring
and shell, said cams and stop means holding the
relative rotative movement in either direction
engaging and yieldably holding the ring and shell
ment, so that the shell is thereby held by the
causes relative axial movement so as to more
fully mesh the said clutch teeth; stop means en
same against further relative’ rotative movement, 10 gaging said ring and limiting said axial move
50 that the shell is thereby held by the clutch
ment, said stop means and cams holding the ring
teeth against, free‘turning on the body; and means
and disk against further relative rotative move
against axial separating movement whereby after
clutch teeth against free turning on the body;
the clutch teeth have been more fully meshed and 15 and means yieldably holding the ring and disk
axial force has been exerted on the shell to axially
move the same‘ against the said spring means and
against relative axial movement whereby after
they have been so moved in response to relative
turning and when the shell is axially moved from
cause initial separation of the clutch teeth and
freeing of the shell for turning, the ring will be
said predetermined position so as to cause initial
automatically axially moved so as tofurther sep 29 separation of the clutch teeth, the ring will be
arate said teeth, the shell upon the removal of
automatically axially moved so as to further
said force and after it has been locked by said
separate said» teeth.
ball being returned by said spring means to its
GEORGE H. COTE.
predetermined position wherein the clutch teeth
mesh.
REFERENCES CITED
25
14. A_ device of the type described having a cen
The following references are of record in the
trally bored cylindrical mounting body; a shell
?le: of this patent:
enclosing an end and peripheral portion of the
UNITED STATES PATENTS
body,v rotatably and axially movable thereon; a
disk'mounted rigidly in the shell in axial align 30 Number
Name
Date
ment with the body; a stud fastened to the disk,
1,050,802
Bryant __________ __ Jan. 21, 1913
extending through the bore of the body; means
1,164,315
Procunier ________ __ Dec. 14, 1915
including a stop, and spring means engaging the
2,147,203
Kylin ____________ __ Feb. 14, 1939
extended end of the stud and the body, for locat
2,206,047
Poorman _, ________ __ July 2, 1940
ing the shell on the latter in a predetermined po-. 3-5 2,378,659
Ross _____________ __ June 19, 1945
sition; a coupling ring rotatably and axially mov
2,392,809
Cote _____________ __ Jan. 15, 1946
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