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SCPÍ- 17, 1946~
Filed Febf 4, 1945
5 sheets-sheet ‘1
ww@ 'à ~
Sept. 17, 1946. '
Filèd Feb. 4, 194s
5 Sheets-Sheet 2
Sept. 17, 1946.
` 2,407,778
Filed Feb. 4, 1943
5 sheets-sheet' 5
sept. 17, 1946.
Filed Feb. 4, 1945
5 Sheets-Sheet 4
1Q we@ 5.
Sept» 1.7, 1946-
Filed Feb. 4, 1945
5 sheets-sheet 5> '
' nu) E
wmuam F. @Home
»gli-2m QKEMPER
Patented Sept. 17, 1946
emrah ...STATES param f oFFlWcE
William F. Groene, Cincinnati, .and ïHarry C.
Kemper, ‘Goshen Township, “Clermont rCounty,
Ohio, assignors to The R.,K. r‘Le'BlondîMa'chine
.Tool Company, "Cincinnati, Ukio, ~a-oonporation
.of Delaware
‘Application -February 4, 1943, Se?ia'llNoAfZilHSZ
liClaim. (C1. .sa-22.)
ithe lim-its .of a commercially practical Aand ef
`iicien‘t f-t-ransmis'sion Lmechani'sm.
¿It Lis `ïtherreior'e 'the `object v‘of 'the ~present in
This invention pertains `-îto taper turning .ap
:paratus and is ‘particularly :related to .mechanism
:associated with @machine 'tools and 'specifically
-to :lathe apron, carriage, .and .tool slide riappa
vention to -.incorporate in a .lathe `feeding mech
ani‘sm, ‘Ja .simplified arrangement of ‘parts which
.ratns ¿of lathes.
are capable .of :a Wide range of use. .In this
connection .applicants have provided an 'arrange
'a ,lathe Shaving a carriage, ‘cross slide, and fan
«ement in whichäbothïthe .carriage and cross `slide
apron, ¿mechanism '.ior .eftecting movement 4oi
‘may ïhe operated simultaneously ‘at differentV
the .cutting tool on ït‘he ¿cross slide of ‘the lathe
rior îtaper :cutting ‘operations on Work ‘fheld 1in l0 rates `of .relative :speed íby .effecting .a change
gear v'drive transmissionbetvveen the carriage and
"the ilathe. ÁOne .0i the .chief objects of .this in
`cross yslide actuating movement; and in conjunc
'vention :is `ït‘o ‘provide uan arrangement ‘in .such `a
i'iDhe #object of lthis invention is to provide in
.tien’with this ¿arrangement .it is also an object.
Itolprio-vi'dela *differential .taper bar which may .be
'actuatedat fa diilierentseries of .relative rates of
differential movement for the 'taper bar With re
vspe‘ct‘to :the :movement ¿of :the Vcarriage along ‘the
.lbe'd `df ith-e iathe. SItjS :'a .further object to pro
ilath'e mechanism 'Whereinïpart of the taper cut
.'a‘ction ‘fis 4effected ìby means of the simulta
neous ¿operation `of the .cross ~-slide and 4the car
.iiiageîlongîitudinal-lyof .the bed of the lathe While
rvat the ïsame ‘timeeto provide .a taper bar operat
ting :at a :differential rate .of movement relative
:tozth'emovement of -:the lathe carriage to eiîect
«vide `4in ‘this lathe apron mechanism, ia .trans
`any variety and isteepness of taper ldesired to be 20 mission gearing ¿capable »lof simultaneously actu
'atin'g lboth o’i ïsai‘d change gear .transmissions in
lonîthe‘workïin .the lathe.
l'association »with their respective 'tool slide, vcar
.Morerspeciiicallylit is'anobject .in such an ar
riage, and tthe taper har.
rangement of .the simultaneous actuation ofthe
‘A still -Turther object loi' this invention is to
'crosssli‘deiand carriage ‘and'lthe diiïerential oper
A‘ation‘of ltheítaper attachment, to provide incon 25 'construct 'this mechanism of compact design
‘completely ~enclosed >`from chips ‘or foreign 1'mat
.juncti'on .with ìboth .of these sets ci mechanisms,
ter ‘which ‘might «'»fall vupon >it Afrom the actuation
change Vgearing fior operating '»the 'cross `slide and
.carriage :at vdifferent"rates with 'respect to each
ofthe “cutting tools on ‘the Work piece. In this
ïotherfand to 'provide 4vchange gearing lin connec
respect, ‘applicants propose to `mount a taper =at
fti'on ‘with the taper attachment .bar ¿for render
‘tafíhmentlbarinthe‘front of the "carriage of the
ing diñerent rates of motion «ci the ~«taper `bar
lathe 'and’tot’ot'a‘lly .enclose ‘said‘taper bar 'by ap
Withrespect‘tothe carriage motion. It, ofcourse,
propriate means so 'as ’to completely eliminate
any possibilities of chips or other `foreign matter
is desired to have .bothoisaidchange gear'mech
anisms driven by’appropri'ate rtransmission gear
.in'gîin the lathe .apronsassociated ‘with .thi‘sltaper -- .
cutting mechanism.
Heretofore, there have v.been taper cutting ap
paratus in 'which the `.apron had .a iixed ‘ratio Lof
imotionro'f :cross `Yslide'movement'.-tc carriage ltravel
:along the ibed :and .in conjunction ‘with ‘this ‘ar
rangement a regular taper :attachment '.bar was
used which had no .differential <motion v.with .re
vspect t'o‘the lathe :carriage movement. Another
arrangement `formerly `used -for taper cutting
comprised change gears îloetvveen .the cross fslide
actuating mechanism 'and »the .longitudinal icar
riage feeding motion to effect a Wide Lran‘ge of
taper îcutting possible wèi'th this .type .of change
vgear arrangement. With
.latter ktype `of
coming (in contact’v‘vith the taper‘bar 'asin former
'types di ‘itaper har construction.
"Further "features and advantages of this in
vention Will .appear Íirom the detailed Vdescrip
tion of 'the drawings -i-n which:
.Eigurel is a .irontelevationof the .lathe apron
and carriage mechanism Apartly in section on
.the line I-I :of I.Figures yII, III, IV, and V yshow
ing `the ‘change `gear transmission mechanisms
-for the'sim-ul-taneous operation of the .cross slide
45 and longitudinal movement »for .the lathe car
`.rifagearid also the fchange‘.geartransmission vgear
ing ,for :actuating the taper ’oar .in diii‘erential
movement ¿relative to the rlon'g'itudinal. movement
ci" `the marriage.
`change gear Aarrangement, however, 'there =was 450 Figure His a diagrammatic sectional view of
ith'e apron transmission ‘gearing :mechanism
ïno ttaper attachment or taper »bar ntilize'd. There
fshovvn on fthe line SLI-II .o'f `:lî‘igu‘re :1.
have lalso :been taper Ecutting :arrangements in
.is `fa fragmentarylplan view .of the
which the relationship :of vthe ‘cross .slide to 'the
lathe .carriage
cross i‘s‘li'de mechanism ~partly
carriage travel .remained constant `vvhile a rdif
nf .Figures I, IV,
L'iierential taper attachment `was ‘provided which
rand V.
would move 'at differential @rates of movement
:Figure .1V is a liragmentary transverse Ysection
with 'respect to the carriage travel.
of these
‘through «the `cross slide .and apron vmechanisn‘i
:above arrangements have ylimited L‘application
:Shown-nn the lines .IVe-.IV iniFigures `Land III.
and -scope :of ~use in that they ‘are »unable to lpro
vide a .complete .range '.of :tapers desired within 60 :Figure V fa »fragmentary ëtra-nsverse .sectional
view through the lathe carriage and apron mech
anism on the line V-`-V of Figures I, II, and III.
This invention is'r shown appliedA toa llathe
bearing 49against axial movement in the carriage
having a bed I upon which is longitudinally slide
ably mounted a carriage 2 and to which is fixed
i ing in the cross feed nut 5I attached to the
bottom of the cross slide 4 has a splined portion
in turn drives a gear 48 journaled in a suitable
2"of the lathe. The cross feed screw 5I) operat
the apron or apron housing 3 and on top of'which
is mounted the cross slide 4 carrying the cutting
tools `5 of the lathe. The carriage 2 is 'moved'
longitudinally of the ways 6 of the bed I by power
from the lathe headstock transmission (not
shown) which drives the conventional feed rod 1,
Figure II, which passes drivingly through the
'52 which slidably engages in a splined bore of
the gear 48 so as `to be at all times rotated by
the gear 48 though free to move in and out ax
ially in the bore of the gear 48.
The cross slide 4 and the carriage 2 may be
operatedv simultaneously in their respective move
ments through the medium of a series of change
gears comprising a change gear 50a, Figure II,
splined bore of the bevel gear 8 journaled against
axial movement in the ‘boss 9 of the apro-11 hous
mounted on the outer end of the rack pinion
ing 3. 'I‘his bevel gear 8 in turn drives a bevel 15 shaft 29 which in turn drives a gear 52a on a
gear I0 ñxed `on the input shaft II journaled in
stud Ela in the apron housing 3, which is indriv- ,
the apron housing 3 on appropriate bearings I2
ing engagement Vwith a change gear 53 carried on
and I3. On the splined portions I Ia of this shaft
I I is slidab-ly mounted the driving pinion I4 which
the shaft 54 journaled in suitable bearings 55 and
56 in the apron housing 3.n Under these condi
may be alternately » slid into engagement with 20 tions of the simultaneous driving of the cross
the clutch gear I5 `or the gear I6 of the com
slide and longitudinal movement of the carriage
pound gear I6-I'I. The gear I 'I of the double
the clutch members I8 and I9 are continuously
gear IIì-I 'I is at all times in engagement with the
gear I5 so that power from the shaft II‘may be
transmittedl directly to the gear I5 from the gear
s I4 or in the reverse direction to the gear I4, the
l gear Iii-'Il' into'the gear I5 to effect driving of
- the gear I 5 in either direction. Appropriate han
dle shifting means (not shown) may be employed
for axially sliding the gear I 4 on the splined por
tion of the shaft I I.
The gear I5 may be moved axially to engage
its clutch teeth I8 with the clutch teeth I9 formed
on the clutch pinion gear member 29 byv manipu
lating the feed start and stop lever 2|, Figure I,
.which causes axial sliding of the shaft 22 to
which the gear I5 is nxed by appropriate lock nut
23 in a conventional manner. The clutch gear
20 is journalled on a stud 24 fixed inthe apron
engaged so that the rack pinion 32 is operated in
the conventional fashion for longitudinalmove
ment of the carriage and apron along the bed
while rotation of the cross feed screw 50 is ef
fected through the medium of the change'gears
59a, 52a, and 53 and the shaft 54 from which
power is taken off by means of the sliding pinion
30 51» which may be alternately engaged with the
gear 58 of the double gear 58-‘59 or'directly with
. the gear 59 of said double gear for effecting the
connection of power from the gear 51 to the gear
4I in either direction. The gear 4I, of course, is
connected to the gear 48 for rotating the cross
feed screw as described above so that the crossY
feed and longitudinal movement of the lathe car
riage and cross slide may be simultaneously ef
By selecting various different change
housing >3 andrhas gear teeth 25 which drive the 40 gears in place of the gears 59a, 52a, and 53, it is
idler gear 26 journaled on the stud 2'I and which
possible to effect a large variety of relative rates
idler gear 26 in turn is in engagement with the
of actuation of -the cross slide and carriageïin
face gear 28 fixed on the rack pinion shaft 29
their respectivefeeding movements to in this
journaled on appropriate bearings 30 ¿and 3| in
way effect different types of fixed sets of tapers to
the apron housing 3. A suitable rack pinion 32 is
be cut by the simultaneous operation of the cross
cut on the outer end of the rack pinion shaft 29 45 slide and the carriage.
and engages in the rack 33, Figures IV and V,
In order to effect any range of tapers in be
ñxed to the bed I of the lathe.
tween the various predetermined selection lof
Thus with the clutch teeth Island I9 in en
Y tapers by the simultaneous movement of the cross
gagement, power may be transmitted `from the
slide and carriage through the mediumof the
rod ‘I to the rack pinion 32 to rotate it in either
change gears 59a, 52a, and53 a taper bar BI) is
direction to eifect the longitudinal feeding mo
provided which is carried on a pivot pin 5I
tion of the carriage along the bed of the lathe.
ñxed in the taper> bar slide 62 which moves in
An appropriate hand Wheel 34, Figure II, fixed
the guide ways 63 formed in the taper bar cavity
on the hand wheel shaft 35 journaled on suitable
65 in the top centers of the front win-g of the
bearings 36 and 31 in the apron ihousing 3 has a
lathe carriage 2. This taper bar 60 may be set
'pinion 38 ñxed on the shaft 35 in engagement
at any desirable angle within its range by means
with the face gear 28 so that when the clutch
of the adjusting screws 66 and locked in place
teeth I8 and I9 are disengaged the carriage may
by suitable clamping screws 61 passing through
be manipulated longitudinally of the bed man
clearance hole 68 formed in the taper bar 69
ually by means of the hand wheel 34. When the
y clutch teeth 39 of the clutch gear 'I5 are engaged
andthe screw 61 being threaded into` the taper
bar slide 62.
`with the clutch 'teeth 4D of the clutch gear 4I
On this taper bar slide 82 is a rack 69 which
power may be transmitted from the feed rod 1
by-a pinion 10,'Figure V, formed on the
directly to the cross slide 4 for actuating it in 65
shaft 'II journaled at its upper end in a bearing
cross slide movement independent of the longi
'I2 in the carriage 2 and at its lower end in a
tudinal feeding of the carriage along the bed.
13 carried in a lug 14 of the apron hous
. When the clutch members 39 and 40 are so en
ing 3. On the lower end of the shaft 1I is a change
v gaged power is transmitted from the `gear I5 to
gear 'I5 which may be connected to a mating
the gear 4I which drives a pinion 42 fixed on the
change gear 'I6 fixed on the shaft l'ï, Figure -I,
shaft 43, Figure IV, journaled in the apron hous
which is appropriately journaled in suitable bear
ing 3 and which has ñxed on it a pinion 44 which
’ ings 78 and 'I9 in the apron housing 3. On the
in turn drives -a pinion 45 fixed on Va shaft 46
upper end of this shaft 'I1 _is fixed a gear 8l)
also journaled in the carriage 2 of the lathe. On
_ the outer end of this shaft 46 is a gear 4'I which 75 which in turn drivesran'idler gearr8I journalled
ion a stud'82 fixed-in the apron housingv3 Aand
si in turn engages rack teeth
§33 cut in the side of the rack 33. Thus it can
ently, power is transmitted from the feed rod 'l
to the input shaft Il and the clutch gear i5 at
which time the clutch teeth 39 and ¿lli are en
gaged and power is taken oif the gear «ll and
longitudinally of the bed l the rack teeth $3
will cause the idler gear 3l to rotate on its stud L71 transmitted to the gear lig-lill and êä--ll'l to
the gear @il for rotating the cross feed screw 5€)
¿i2 and through the driving transmission just
in its nut 5l ‘for actuating the cross slide ¿i as
described to rotate the pinion "il and thereby
best seen in Figure IV. When it is desired to
move the taper bar slide @S in the guide ways E53.
be seen that as the carriage 2 and apron 3 move
By appropriately selecting the change gearing
comprising the gear 'i5-_lâ various rates of rela
tive differential motion of the taper bar carriage
59 with respect to the carriage and with respect
to the hed of the lathe may be effected and,
coupled with the angular adjustment for the taper
a large variety of infinitely variable tapers
may be provided and talren in conjunction with
the transmission mechanism just described for
operate the cross slide and longitudinal carriage
motion simultaneously the clutch teeth lil-«i9
are kept in constant engagement. Power is
then transmitted from the feed rod ‘l to the in
put shaft Ii to the gear I5 to actuate the lon
gitudinal feed rack pinion 32 as described. At
the same time power is also taken off the rack
pinion shaft 2'9 and is transmitted through the
change gears 5ta, 52a, and 53 to the shaft 54
where power is transmitted through the gear 51
the simultaneous movementl of the carriage cross
either through gear fil-59 or gear 59 to the
slide, an inñnite range of tapers may be effected.
¿5i for rotating the cross feed screw 5i).
The modification of the movement of the cross
Thus under these conditions both the pinion 32
and the cross feed screw 5t simultaneously oper
slide byofthe
the taper
cross feed
‘oar screw
is effected
5i? while
by itthe
is being
rotated simultaneously with the movement of
the -carriage longitudinally of the bed. This
mechanism comprises a journal block 8d which is
axially slidable in guideways 35 formed in the
block 35 appropriately ñxed on the surface 3l of
the carriage i.' by means of the screws S8 and
locked in position at the rear by a suitable tongue
¿is engaging in a key way in the rear face si?
formed in the carriage 2, This journal block 84
thus may be' slid axially by means of the shoe ’li
having a trunion 92 fitting in a bore Q3 formed in
the bottom of the block Sil and which shoe Si has
surfaces S4 which ñt around the taper bar Gt se
ate. Also by selecting various changes for the
gears 5nd, 52a, and 53 different rates of relative
movement of the cross slide ¿i and the carriage
3 along the bed may be effected giving deñnite
predetermined fixed steps of tapers for the cut
ting tool 5 mounted on the cross slide â.
In order to further modify the various pre
determined steps of tapers effected by the simul
taneous operation of the cross slide and carriage
as above described, infinite variations are ef
fected through the medium of the taper bar 6i)
which may be operated at a series of predeter
mined different rates of motion through the
medium of the gearing comprising the pinion 8l
operating in the rack teeth 83 of the rack 33
through the gears Sil, lli, l5, and 'íû operating in
the rack 69 in the taper bar slide 62. Adjust
on the guideways E3, the block B4 will be moved
ment of angularity of the taper bar G0 also fur
in and out to push or pull the cross feed screw 40 ther modiñes the infinite variety of positions ob
through the medium of the thrust bearings 35
tainable for any desired series of tapers to be
and 95 to eïect the axial movement of the cross
cut by this apparatus.
that for any position of angular setting of the
taper bar 6D, the shoe will follow this bar and,
as the bar is moved along the length of the bed
feed screw
while still permitting its rotation
by the gear til. Manual rotation of the cross feed
screw may be effected at all times by the hand
wheel el appropriately attached to the outer end
of the cross feed screw Eü.
One of the unique features of this arrangement
of the taper bar 6E? in the front wing of the car
riage is that it may be totally enclosed from ex
posure to any dirt or chips whatsoever discharged
from the work and cutting tools. In order to
What we claim is:
In a lathe tool feeding mechanism, a bed, a
carriage on said bed, a cross slide on said car
riage including a cross feed screw, an apron on
said carriage, a feed reverse transmission in said
apron actuable from a source of feed power of
50 said lathe, a cross and longitudinal feed selector
connected to said feed reverse transmission, and
taper control mechanism in said apron includ
ing the combination of a change gear transmis
sion, means for connecting said transmission to
accomplish this result, appropriate covers 9S and
S9 are nicely fitted against the faces llìß and it!
of the block 8% and against the rear face 9!) and 55 rotate the actuating cross feed screw and move
said cross slide, means for connecting said trans
the bottom face 3l of the carriage to in this way
mission to said cross and longitudinal feed se
insure a tight closure for the entire taper at
lector when longitudinal feed of the carriage is
tachment mechanism with no exposed portions
being effected, a taper attachment mounted in
whatever and no moving parts at any point out
side the carriage and apron mechanism which 60 the carriage having a taper bar, means oper
ably connected to the cross feed screw and slid
could become covered with foreign matter from
able along said taper bar for transmitting mo
the work and tools.
tion to said cross feed screw in accordance with
summarizing the essential functions of this
the angle of said taper bar for axial recipro
taper turning apparatus, it will be noted that a
longitudinal movement of the carriage may be
independently effected by applying power from
the feed rod l through the input shaft Il to the
clutch gear i5, at which time'the clutch teeth I3
cation of said cross feed screw, and a change
gear transmission in said apron adapted to be
driven from a rack fixed cn said bed by the
movement of said carriage thereon and con
nected to said taper bar for actuation thereof
and I9 are engaged so as to transmit this power
through the pinion 25 and the idler gear 26 to 70 to vary the effective motion transmitted there
by to the cross feed screw.
the face gear 28 on the rack pinion shaft 29
and thus through the medium of the rack pinion
32 to the rack 33 on the bed of the lathe. When
it is desired to operate the cross slide independ
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