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Патент USA US2404146

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July 16, 1946.
Filed Aug. 16, 1944
5 ~Shee1'.s-Shee’o 1
Lnuenfor; ;
.—-——_ I
July 16, 1946.
Filed Aug. 16, ‘1944
7 2,404,146
'5 Sheets-Sheet 2
vHarold Mboarff
July 16, 1946.
~ 2,404,146
Fiiled Aug. 16, 1944
_ s Sheets-Sheep s
'7’ i?
[Z? n
Harold MScarff
July 16, 1946.
' ‘2,404,146
Filed Aug. 16, 1944
5 Sheets-Sheet 4
Harold M. Scarff I
Juiy 156, 1946.
H. M. scARFF
Filed Aug. 16, 1944
5 Sheets-Sheet 5 v
94 ‘93
/ I
90 9]
Patented July 16, 1946
Q “Harold M. Scarff, Muskegon, Mich., assign'or to
. Muskegon Piston Ring Company, Muskegon,
- Mich., a corporation of Michigan
Application August 16, 1944, Serial No. 1549.707
6 Claims.
(01. 90—.—15.1)
vThis invention relates to a piston ring slotting
machine- Piston rings used in the lower groove
or grooves of pistons in internal combustion en
tion, showing the mounting of one of’the ring
arbor carrying units and the manner in which the
ring arbor and rings thereon'are detachably con-:
gines are in many cases provided with slots cut
by saws, such slots being located between the 5
Fig. 7 is a fragmentary horizontal section
opposed ?at sides of the rings and extending their
. through a "piston'ring' showing the-manner in
outer curved bearing faces to the inner sides
which the slots are cutltherethrough, and ' '
thereof. The slots are, spaced from each other
Fig. 8 is a diagrammatic view of the‘el‘ectrical
around the ring and in the circumference of a
controls used in connection with the machine.
ring a plurality of the slots are cut, the number .10
Like reference-characters refer to like parts .in
of which may vary. ‘The present invention is di
‘the different ?gures of the drawings.
rected to a machine by means of'w'hich a num
ber of piston rings may be simultaneously slotted,
‘The machine has a supporting cast frame I
from the upper rear portion of which a sleeve 2
one slot after another, until all of the slots in
extends upwardly. At the front the frame has
a ring support and guide 3, within and below
which is ‘a vertical vsleeve '4 (Fig. 2) ,‘ for the
time of removal and replacement a second plu
mounting and support of a turntable 5._ The
rality of rings be undergoing the slotting process.
turntable has a downwardly extending vertical
This provides a very rapid production machine
stem 6 passing substantially‘ithrough and rotat-'
and one with which the slotting operation is per 20 able in the bearing provided by the sleeve 4 and
the rings ‘are completed, the processed rings re
moved and replaced by others, and during such
formed rapidly and accurately so that with the
machine and‘one operator, therefor, large quan
tity production is obtained at low cost.
at its lower end a retaining plate 8 is detachably
connected as shown in Fig. 2.- The table at its
upper ‘peripheral portions has an outwardly ex- ,
Another feature and object and purpose of the
tending annular ledge '! resting upon and movable
present invention is to provide the machine with 25 over the upper edgesof the ring 3. (Fig. 6). The
at least two slot cutting or sawing units either
table at its upper side is provided with a plu
of which may be used in slotting the rings. The
rality of upwardly extending handles 9‘ which
other is idle and is conveniently located for access
be grasped to turnthe table about its vertical
so that the cutting saws may be sharpened or re
axis of movement.
placed if necessary, the work which the ma 30
The ‘turntable .is adapted to occupy two posi
chine is doing not being interrupted. This
tions and be releasably held in such positions. A
makes it possible for the machine to be contin
locking bolt It (Fig. 4) is normally pressed out
ued in production operation all of the time with
wardly by a spring H to enter an opening l2 in
out need for it to be idle in the event that a saw
or saws have teeth broken therefrom or- become
dull and need resharpening.
Many other novel constructions and useful ‘re
sults coming therefrom will be apparent upon an
understanding of the invention had from the fol
lowing description, taken in connection with the
accompanying drawings, in which
Fig. 1 is a side elevation of a machine ‘made in
accordance with my invention.
Fig. 2 is a vertical section and ‘partial side ele
vation, the section being on the plane of line 2—-2
of Fig. 3.
Fig. 3 is a horizontal section substantially-on
the plane of line 3—3 of Fig.2, looking in a down
ward direction.
Fig. 4 is a .fragmentary enlarged vertical sec
tion on the plane of line 4-4 of Fig. 3, looking in
the direction indicated.
Fig. 5 ‘is a horizontal section on the plane of line
5—'5 of Fig. 2, lookingin a downward direction. '
the underside of the ledge "I, said bolt It being
' mounted vertically underneath the ledge on the
support 3. There are two of the bolt receiving
openings [2 (Fig. 3) thereby governing the two
positions in which the turntable is held. The
40 bolt is manually retracted by means of a short
horizontal stub shaft I3, having gear teeth at its
innerend and engaging with a rack atone side of
the pin l0, and with a handle l4 connected with
the shaft for manual operation to retract the
45 bolt and lift it out of the recess 12 with which it
is engaged.
At diametrically opposed places on the table
vertical openings are made therethrough forthe
mounting of two sleeves [5 which are rotatable
50 therein'and which are ?anged at their upper ends
to bear against adjacent upper portions of the
turntable. At the lower end of each of the
sleeves IS an indexing wheel It is permanently
secured, provided 'at its periphery with spaced '
Fig. 61'is a fragmentary enlarged vertical sec .65 apartlradial vnotches I‘! (Fig. 5). A pin I8 is
j extends below the lower side thereof.
In the upper end portion of the sleeve I5 a ver
1‘ tical stem 19 of a ring‘holding arbor is adapted
} to be inserted. At the upper end of the stem a
?xed collar 25 is formed as a part of the arbor,
. being notched‘ at its lower side to engageewith a
1 key 2| at the upper end of the sleeve ‘l5 to hold
the arbor against rotation withrrespect to the
31, and'extends below it, the axes of each of said
shafts being offset from the axis of its associated
shaft .38. Each saw arbor shaft at its lower end
carries a plurality of thin saws 4|, spaced from
secured to each oftheindexing wheels l6 and
each other, there being one of the saws for each
of the rings 22,, carried by a ring holding arbor. .
It is, of course, to be understood that the saws '
4| are releasablyv connected with their arbor
I . shafts 40. the detail not being shown as it is old I
and well known. The saw arbor shafts 40 are
‘ sleeve J5 on which it is mounted. Above the col-f .10..‘. driven
bytheshaft's 38 through gearing indicated
‘ lar-20 a plurality of piston rings 22 which are .to
at'42, in Fig.2.
be'slottedare located in superimposed relation
. ‘,f and
and aclamped
24. ofithe’collar
A stem
'23 ex2i) . .
V . tends'upwardly from the collar 24 through the l
piston rings and is provided at its upper end por- “
,An'elect-ric motor 43 is supported on a suitable
bracketsupport 44 'at the upper side of the sup
porting. casting I, the shaft of the motor being
- equipped. with?‘ a grooved
driving pulley
around which‘ and theadjacent pulley 36 end
, tion with a slot to receive a key 25 therethrough I f less lbelts 45 are adapted to be, placed for driv
ing the saws continuously, that’is, the saws on
1 which bears with a considerable wedging force 5
1 against "the upper side ofi'the collar 24 tohold
20 one arbor shaft 43. .‘One, of the pulleys, asshown "
in Figsl, will be driven and the other idle. But
‘ the rings'in closed clamped position. ; The struc
the, pulleys and saws are interchanged in
ture of the arbor need not'ibe entered into in de-" .
position, as later'desoribed, the belts 46 are re
'; 'tail as it is shown in the pending application, 6
moved from the pulley 36 which has been driven
1 -Serial.No;§503,097,' ?led September 20, 1943. I,
and are placed around the other pulley 36 for the
. 131 The stem il9'near its'lowerend has a notch or
.driving of itand the slotting saws 4| associated
recess 26in a' side'ther‘eof in which the upper
' 1. iendiof?a spring ‘actuated retaining ‘dog 121, is
adapted ‘to belreceived to releasably retain the
3 arbor inplace; i. The vdog2'i is pivotally mounted
between its ends and at its lower endis provided
with‘ an 'angularly‘ disposed tail piece, as shown "
V in Fig.6: VA rod 28 passes freely upward through ‘
From each of the housings 31, upper and lower
‘arms » 4T extend outwardly :(Fhgs. 1 and’ 2),
through which a shaft 48 extends. A pinion-49
is'at the lower end of the shaftjbelow the lower -
arm 41, and'the‘ upperend of the shaft is shaped
' to receive a wrench for turning it. A curved arm’
1 théindexing'wheellB and the lower part of the
‘sleeve 15, andhas a beveled :upperpnd bearing‘ 7 56- is adjustably mounted at a side of eachhous
31; below the lower arm 41 on suitable ways
‘against the inclined lower side. of the tail piece‘ 35 ing
5| (Fig. l) with bolts as shown for securing the
'offthe‘dog 21'." A lever29 is pivotally, mounted
arm in any position to ‘which adjusted longitu
between'its' ends on a bracket 36 depending from
dinally of said ways. The adjustment is effect
‘ ”th€JSlIpp01‘t,/3; andyat its inner end Nils-Provided;
with a‘?projection g3! :whichbears againgst‘the ' ed by releasing the bolts and turning the shaft
v43, each arm being I provided with rack teeth 7
lower end of rod 23. -. A downward push upon the"
‘outer end of, rod 29 (Figs. 2 and ,6) moves the rod
1, »23 upwardly; and shifts the, dog 21 toa position
:to release the arbor so that it can beeremoved.‘
(Fig. 3) with which an associated Pinion 43 en--'
gages. Each arm at its free end is provided .with
"a roller 52. Two tension springs 53 are connect~ ,» '
each at one end to the upper sleeve extension
,Qn replacing an arbor which has been removedi 45. ed
and at their opposite ends to rods adjustably
with anew arbor loaded with unslotted piston
through lugs 54' projecting from the
‘rings, the lower‘end' of ?the'stemr l9 engages vthe extending
housings 3?. Said springs 'under‘tension' nor-,
I hupperend portion‘ of the dog 21, pressing ‘at its
.mally tend to pull the housings in a clockwise
one sideuntil notch 26 hasreached a‘ position
to receive the upper‘ end of the dog, it being" 60 idirection'(Fig. 3) about the axes of the shafts 38
and pins 39.‘
moved into retaining position ‘by the spring‘act
M'The’ sleeve 2 of the main ‘supporting frame
. casting receives within it and provides a bearing
r ‘The unit described and which ismounted upon
the central sleeves 32, 34 with their outwardly
. extending arms 33 and 35 may be turned as a
whole aboutthe vertical axis of the sleevepor
'for‘a. downwardly'extending sleeve 32 (Fig. 2)
32 which is'within the bearing sleeve 2, and
~fronithe upper part of which oppositely extend 55 tion
inv either of two positions by a spring,
‘in‘g horizontal arms 33 project. Above the arms
the ‘sleeve is extended as shown at 34 and imme
diately over said arms said sleeve is slotted at
actuated lock bolt 55.
In one position one gang .
of saws will be over the inner portion of the turn
table 5 and will be driven by the motor 43. The
opposite sides (Fig. 3). The upper end» of the
other gang» of saws will be diametrically opposite
sleeve is closediby a head 35, likewise having 60 and back of the main'supporting casting I (Fig.
oppositely extending arms, adjacent the'outer
2) accessible for inspection, repair, removing‘
' end of each of which a belt pulley 36 (preferably
and replacement.
7 g
jgrooved as shown, Figs. l and 2), is mounted for
The rollers 52 drawn inwardly by springs 53
rotation. Between the ends of each pair of arms 65 pass through the slots in the sleeve extension 34
33 and35 a housing'3l of the form shown in
(Fig. 3) and normally bear against a cam 56
3 is located. A shaft 38 connected with each
ibelt} pulley 35 extends downwardly through the
’ arms of the head 35 into'eachhousing 31. 'The
’ vertical axes of shafts 38 are coincident substan
.st the upper end of a vertical shaft 51 which
extends through the lower sleeve 32 and is',r0
tatably mounted at its lower end on a horizontal
tially with‘ the axes of'pins 39 (Fig. 2) projecting 70 portion la of the main casting frame (Fig. 2).
The unit which is idle may be held at an ‘outer
:upwardly from ‘arms 33. The pins. 39 extend
- position in any suitable manner so ‘that the spring
. . “jinto openings in the ‘lower sides of the housings
53 associated with it is maintained ina stretched
condition, with the roller 52.,.out.o_f‘ engagement
:lcommon vertical. axes of shafts38;and~pin.s 39. '7 5, with
the cam'56 as shown inFig.' 3; ’With‘a roller
A saw arbor shaft 40‘ is mounted in each housing
i 3150' that, said housing may be rocked about the
, 6
52 bearing against the edge of cam 56 and with
‘shaft 51 continuously rotating, the housing 31
with which'such roller 52 is associated is rocked
back and forth' about ‘the axis of the shaft 38 so
that the saws M are moved back and forth with
‘such rocking movements.
Shaft 51 carries a worm wheel 58 driven by a
worm 59 on a shaft YGZK‘Figs. 2'and 5). In align
ment with the shaft.v '6'2is a second shaft (not
from the full "line to dotted line position shown in
Fig.- 55, ‘the member 81 is lifted to a position above
a'switch lever>89 (Fig. 1)., the member'f88 pass
ing thereby, whereby ‘when it is released and the
weight‘ of the member 81 causes it-to return to its .
initial position, the lower side o‘fthe'part 88 en
gages the switch lever '89 to turn it as is evident,
said lever'89 returning ‘to initial position after
numbered, Fig. '5) having a pulley driven by ‘a 10 ~ The‘ switch lever 89 is a part of the control
belt 60 which in turn is driven by an electric
mechanismfor the clutch 83 for its connection
motor 51 mounted at the back of the machine.
‘and disconnection through a ?uid pressure oper
Between ‘the shaft 62 and its aligned ‘shaft is a
ated cylinder and piston 90 and 9|. --Said cyl
clutch 633 (Fig. 5) so that vthough the motor ‘6|
inder 90 is located at the back of the machine
may be'c‘ontinuously operating, shaft 62-is driven 15 (Fig. 5) and the piston rod connected with a
only whenithe clutch ~at~63 vis connected.
The index wheel 16 of the-sleeve l5 which car
ries a loadedarbor of ring's- which are to be ‘acted
‘upon by the saws hasfa locking dog 64 engaging
lever ‘92, the movement of which shifts the :mov-é
'abl‘e member of clutché?3- into or out of ‘engages. _ '
ment with the drivenicliutch members. Cylinder
.90‘ (Fig. 8) has pipes 93 leading to oppositeends
successively in the notches ['1 to hold the sleeve
15 and the rings associated therewith from rota
tive movement while the slotlsawing takes place.
thereof, which pipes'Y-are connected with'a’lvalve
The dog 64 is guided in ‘a sleeve guide 65 (Fig.
ing '94 is a valve which selectively openseither .
housing 94 to which a ?uid pressure ‘medium’ is
conducted ith'roughr‘a pipe 95-. Within the house
5) and normally pressed outward by a spring 66.
of the pipes 93, at the-same time closing the
'Allever 51‘ is pivotall'y'mounted between its ends 25 other. Associated therewith is- a- housing. ‘96.
and connected with the dogat one end, the other
which carries an-electrical appliance, for exam-'
endcarrying a roller 68 bearing upon a collar
'ple, a solenoid construction connected withfthe
?l?xe‘d on and rotatable ‘with shaft'51 and which
valve,- with electric wires ‘91 in one of which a
has a, projection 10 at one side, so that with each
manual switch 98 is interposed, vand other wires
rotation of the ‘shaft 51, lever 61 is actuatedto
"99 in which the switch'controlled by the ‘leverl89
withdraw the locking dog 64 from a notch H in
isinterposed. The detail'of this construction 3is
the index wheel 16 with which it has beenyen
not set forth as it is not in itself new and is
gaged, as shown in Fig. 5.
A second cam 1| (Fig. 5) is secured to the
known to those skilled in the electrical-?eld. - '
In operation, with the motor 43 continuously
shaft 51 below the collar 69 bearing against which 35 running, therefore driving the “saws 41 at the
is a roller 12 mounted between the ends of a
lever arm 13 pivotally mounted at one end on a
front of the machine‘;"and with the motor ‘61
continuously running but with clutch 63 discon
'nec'te'd, an arbor loaded with rings 22 is ‘moved
lug 14 extending inwardly from a side of the
main supporting frame I. vA rod 15 passes freely
into processing position as indicated'in dotted
through the other end of the lever arm 13 and 40 lines inFig; 1. The switch at 98 is manually
has nuts at its outer end between which and the
closed which effects a now of liquid pressure to
arm 13 a coiled spring 16 is located. The oppo
the proper end of the cylinder 90 to move the
site end of the rod 15 is pivotally connected to
piston and the rod 9| and connect the clutch at
the outer end of an 'arm 11 which, as shown in
'63. When this occurs the rotation of the shaft
Fig. 2, is located below a part of the main cast 45 51 causing a turning of cam 56 (Fig. 3) moves
ing support and is connected by a vertical shaft
vthe operating housing 31 and with it the oper
82 ‘with a second arm 18, the two arms 11 and 18
‘ating saws 4| toward and into sawing engage
providing in ‘effect a bell crank lever. A tension
ment with the rings 22 to cut one of slots I00
spring 16a (Fig. 5) acts upon the arm 11 to nor
(Fig. '7) in all of the rings 22. With a con
mally pull it to the left. At the outer end of 50 tinuation of movement of cam 55 and when the
‘arm 18 a spring actuated ?nger 19, ‘with a dog
roller 52 reaches the proper position on said
80 thereon projecting laterally, is pivotally
cam, the spring 53 which has been stretched
mounted, the spring acting to turn the arm
‘withdraws the housing 31 and the saws associated
clockwise (Fig. 5) for the ‘dog to ride against the
peripheral edge of the index ‘wheel [6 and at 55
During this time that such withdrawal has
times enter the notches l1 therein. The dog is
taken place the projection 10 ‘on the collar 69
limited in its movement by an adjustable stop
comes to the roller 68 and operates lever 61 to
provided by the screw 8| (Fig. 5).
withdraw the locking dog 54 to the position shown
-A ?nger ‘83 has its free end portion normally
in Fig. 5 and thereby release the indexing wheel
interposed in the path of movement of the pin l8 60 with which it has been engaged. The cam 11
extending downwardly from the inner index
moves to release the lever arm 13 which will
wheel l6. Finger 83 is secured at its opposite end
then permit the movement of rod 15 and lever
to a short vertical rock shaft 84 between which
11 by spring 16a counterclockwise (Fig. 5) so
and a, horizontal shaft 85 extending through a
that the dog 80 will move in a counterclockwise
side of the machine gearing connections, as indi 65 direction about the indexing wheel I6 from one
cated ‘at 85, are interposed, whereby the move
notch [1 to the next one and upon cam 1| mov
‘ment of the ?nger 83”»from its full line to its
ing still farther so that it draws the rod 15 and
dotted line position shown in Fig. 5 rocks ‘the
arm 11 to the right (Fig. 5) the indexing wheel
shaft 85 a limited distance. At‘ the outer end of 1
will vbe moved one step to bring the next succeed
the ‘shaft 85 a sector-like weighted block 81 is' 70 ing notch in position to be engaged by the re
secured at the curved edge of which a spring
leased dog 54.
‘actuated ‘member '88 is pivotally suspended (Fig.
This operation is repeated until the indexing
‘ 1). ‘When the pin 18 ‘engages ‘against the ?nger
wheel has made a complete revolution. With
v'83 in the movement of the indexing wheel 16 to
each repetition the position of the rings 22 is
which the pin is connected‘ and-moves said f?nger "Pch‘anged so that succeeding slots. I00. are’ cut
25404, 146.
through theri'ngs until the ?nal/slotis out which
vertical driven shaft extending ‘into, and partly
5by the arbori; It is at this time that pin l8_'oper_
iates'against the, ?nger 83 and, moves theswitch
‘lever 89: as previously ‘described, causing'a change
Qof the position of theifluid pressure control valve
and the reversal of the ?uid pressure movement
of the shaft, twoyhousingsmounted on vsaid sup
port, for rocking movement-each about a vertical
aXis, a cam follower on each housing to bear
‘;completes the process on all of the rings carried , I through said support,'a~cam at theupper end ‘
against said cam, a saw arbor- shaft mounted to
turn about a vertical axis carried by‘ each hous
_ ing and, extending therebelow, each‘ saw arbor
‘to the opposite end'of the cylinder 90, the piston
at its lower portion carrying a plurality ovflspaced‘
connect the clutch 63 and stop the machine when 10 horizontal saws; said arbor shaft being; offset
from the, axis ‘about which the'housing is rocked,
‘a plurality of the ring castings havebeen com
andmeans'for driving said saw arbor shafts,’ said
driving means being in a ?xed position and adapt?
, 'The turntable‘5 is then‘ireleased by; pushing
‘rod 9| ‘in its return movement operatingto'dis- - '
J‘ '
down upon the handle I4 and is turned through ‘ 'ed to drive one ofsaid saw arbor shafts when
180°,§as indicated by the arrow in Fig. 5, to bring
‘the arbor‘loaded with unprocessed rings,‘ which
previously was ,at, the- front of' the-turntable,
into position to be slotted.‘ The switch at 98 is
manuallv closed and the clutch 6,3 reengaged for
repetition of the cycle described- While the sec
ond plurality of rring?castings is being slotted,
said support ‘is intone position andjthea other of’
said saw arbor shafts when the support is; turned
about a vertical axis to another position. * ~
_ ‘3. A constructionhaving theelem'ents de?ned
in claim ,2,‘ and means for mounting: a plurality
of horizontally located piston ,ring »castings_,;in
superimposed , relation one i against the, Obheriand
clamped together in a'position for engagement'by
' .those ‘which have been processed are removed by
the saws of the driven saw arbor shaft, saidsaws
manuallyoperating lever 29 to free the arbor of
being moved inwardly to'saw>;s1ots throughthe
1processed " rings, it being replaced“ by another
3 arbor, loaded withunprocessed rings. Thisoper-r 25 piston ring castingsv and then outwardly to ,dis
engage therefrom through the rocking of the
~‘ ation ,_ is ‘repeated. inde?nitely, it being ‘neces
housing which carries said shaft controlled’ by
saryfor thev machine operator ‘merely to remove
said cam, and means controlled by said ?rst-men
the arbors carrying processedrings and replace
tioned vertical shaft for periodically turning said
with arborsloaded‘with unprocessed rings, vun
‘ilock and turn the turntable between the succes- 30 piston rings about a central vvertical axis a pre
selected distance at the times'that th‘e'saws have
jsive automatic stoppings of the machine, and
been moved away from said castings.‘
. p 4
; close the switch for connecting clutch 63 at‘the
, 4. A construction having the elements de?ned
‘ 1 times, after the ‘machine has been stopped to
in claimZ, and means for mounting a plurality
1 cause it to again operate;
_The construction described is practical and
‘ effective 1 and with it in practice, very high quan
‘ tity production of the slotted. oil rings is obtained.
unprocessed rings vandthe,otherstagethe place ‘
r P atwhichthey are slotted; provide‘s‘for a rapid ‘
3 continuous quantityzproduction. vThe invention
» "piston ‘rings'about a central vertical axisoa pre
1 has proven'very successful in practical opera
selected distance at the times that the saws'have
been moved away from said castings, combined
tion. It is de?ned in the appended claims and
“ is to be considered comprehensive of all forms
with means for automatically stopping said verti
'1» of structure coming within their scope.
superimposed relation one against the other and
clamped together in a position for‘ engagement by
being moved inwardly .to saw slots through the
piston ring: castings and then outwardly to dis
engage th'er'efrom, through "the rocking of :the
housing which carries said shaft controlled‘by'
said cam, and means controlled by said ?rst men
tioned vertical shaft for periodically turning said
1. turntable havingtwo stages,’ one for loading with
of horizontally located piston ring castings in
the saws of the driven saw arbor shaft, said saws
' 'As previously mentioned no stopping of the ma
1 chine operation is required for reconditioning i of the slotting sawskorv -their,_replacement. ' The
1. In a machine of the class described,~a hori
cal driven shaft from rotation after saidpi'ston '
rings have been turned by s‘tepby ‘step ‘move
I zontal substantially. ring-like support, a ‘hori
ments so as to saw a plurality of equally spaced
‘ zontal, turntable mounted within: said support
and‘ extending over the upper‘ side and bearing
slots'throughsaid'rin‘gs 'therearound.
1 thereon, means for mounting said turntable to
ing, a support, a second ‘support mounted‘ on the
‘?rst support'to ‘be turned about a vertical axis,
‘ turn about a vertical axis, two sleeves‘ rotat
A machine for slotting piston rings compris
diametrically‘ opposite
1 ably mounted upon and“ extending vertically
through said turntable inside‘ said ‘support, a
1 of thefdog, a rod in each sleeve having 'a- cam ‘
' upper end ‘mounted lengthwise of the lowerpor- ‘
. horizontal saws‘, a driven shaft mounted vertical- »
‘each other, each mounted upon the‘second sup
piston ring carrying arbor having a downwardly » port to rock about‘ a vertical axis spaced from the
axis of the second support, ‘a'vertical saw arbor
f extending stem to pass into the upper end por
tion" of ‘each sleeve, said jstem having a notch 60 shaft mounted on each housing and extending'be
low it, each saw arbor ‘shaft at'its lower end por
in a side‘ thereof, a spring ac‘tuated‘dog mounted
tion being adapted to carry a plurality of spaced
'on each sleeve to enter said notchf at one end 1
ly in each'housin'g and about the axis of which
tion of ‘.s‘aid‘sleeve and extending therebelow, 65 the‘ housing is rocked, driving connections be
tween said‘ vertical shafts and the‘ saw varbor
said dog at its lower end having a cam edge to ‘
engage the 1camend‘ of the rod, a lever pivotally » shafts, a‘;v driving means mounted upon the ?rst
support adapted to‘ have selective connectionjwith
mounted‘between its ends and-carried by said
; ‘support at one end, extending'underneath either of , .sa‘id. vertical shafts,ione at a timejsaid second
1 said rods in a, predetermined'p‘osition of the turn ‘
.‘sup‘port beingturnable‘ ‘about itsvertical axis’ of’
table, whereby one of said rods may be 'moved up‘
‘ iwardly ‘on operation of the lever to disengage said
'rotation tolvbring either jofssaidshafts into po- '
s'ition for connection with thedriving means, a
driven vertical shaft mountedupon the ?rst sup
j. 2. In"a;machine.ofitheiclass:described;alsupg h 'port and extending into thesecondsilppertilav-
do'g‘fromfs‘aid arbor stem;
;_port'.-'mounted to turn: about ‘a; vertical: axis,‘:a:75' ‘ing ‘an axis substantially; coincident .iwith itheiver
tical axis about which said second support is turn-,
able, a cam on said last mentioned shaft, a cam
follower on each housing adapted to bear against
the cam, and means normally drawing said roll
ers into engagement with the cam, whereby on ro_
tation of the last mentioned shaft a housing is
rocked to shift the piston of the saw arbors and
the saws thereon.
6. A machine for slotting piston rings compris
tation to bring either of said shafts into‘ position
for connection with the driving means, a driven
vertical shaft mounted upon the ?rst support and
extending into the second support having an axis
substantially coincident with the vertical axis
about which said second support'is turnable, a
cam on said last mentioned shaft, a cam follower
' on each housing adapted to bear againstthe cam,
means normally drawing said rollers into engage
ing, a support, a second support mounted on the 10 ment with the cam whereby on rotation of the
’ ?rst support to be turned about a vertical axis,
last mentioned shaft a housing is rocked to shift
housings substantially diametrically opposite
each other each mounted upon the second support
to rock about a vertical axis, spaced from the axis
the position of the saw arbors and the saws there-,
on, a vertically positioned piston ring arbor hav
. ing a plurality of piston rings located horizontal
of the second support, a vertical saw arbor shaft 15 ly thereon in’ superimposed relation, rotative
means for carrying said piston rings to a position '
mounted on each housing and extending below it,
each saw arbor shaft at its lower'end portion be- _
to be processed by the saws'on rocking movement
ing adapted to carry a plurality of spaced hori
of the housing carrying them toward adjacent
zontal saws, a driven shaft mounted vertically in
sides of the piston rings, said saws disengaging
each housing and about the axis of which the 20 from the piston rings on continuation of the rock
housing is rocked, driving connections between
ing movement carrying them away from the pis
said vertical shafts and thesaw arbor shafts, a
ton rings, and means to turn said piston rings a
driving means mounted upon the ?rst support
predetermined distance to present another portion
adapted to have selective connection with said
of said rings to the saws, said turning occurring
vertical shafts, one at a, time, said second sup 25 when the saws are away from the rings.
port being turnable about its vertical axis of ro
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