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Патент USA US2120198

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June 7, 1938.
Filed July 23, 1934
3 Sheets-Sheet 1
June 7‘, 1938.
_ 2,120,198
Filed July 25, 1934
3 Sheets-Sheet 2
~ BY
R. 6'. /l/V0£/?d'0/V
Patented June 7, 1938
ammo momma
John Y. Blazek and 1am“ G. Anderson, Maple
Heights, Ohio, assignors to Lempco Products,
, Inc., Bedford, Ohio
Application July 23, 1934, Serial No. 7736,4196 '
11 Claims. (Cl-'5_1—-50)
The present invention relates to improvements
in grinding machines and grinding operations on
parts throughout the views.
. work.
Objects of the present invention are:
To provide a grinding machine with means for
holding and rotating and indexing work for suc
cessively operating on different surfaces there
of by one grinding wheel.
To provide such a machine with» a turret-like
10 element which does the. work holding and work
To provide such a machine with a work rotat
ing means located mainly within the turret-like
To provide such a machine with an individual
driving means for rotating work therein.
To provide such a machine with an individually
driven grinding wheel.
To provide such a machine with an .axially
20 movable quill to carry the grinding wheel spindle.
top of the bed A has the guide ways ll.
The carriage B telescopes over the guide ways
l0 and is guided thereby in its travel transversely
stopped and started by axial movement of the
gib II to take up all lost motion there between I
the carriage and the bed. The lock nut ll is
threaded onto the screw l2 and abuts the bed to .25
retain the screw in adjusted position and there
To provide such a machine with an adjusting
by holds the gib in adjusted relation to the car
To provide such a machine with manually op- 4' r age.
erated work gripping and work releasing means.
The carriage extends some distance toward the
.To provide such a machine with a manually rear of the machine and has the grinding wheel
controlled turret and manually controlled feed vdriving motor C mounted on the top of the rear
ing of the grinding wheel.
portion thereof so that the motor moves with the
Further objects will be pointed~ out during the carriage transversely of the ‘bed for purposes ap
description of the machine shown in the accom
pearing hereinbelow. ‘
panying drawings, or will become obvious or ap
The screw I4 is journaled in the plate I5 which
parent or will suggest themselves upon an in
is rigidly secured to the bed to form a substantial
spection of the accompanying drawings and this part'thereof. The collar I6 is integral with the
screw I4 and abuts the inner face of the plate IS.
The present invention is illustrated in this ap
The collar I1 is held to the screw It to rotate
plication as being applied to or used for grind
therewith and abuts the outer face of the plate
ing valves although it is quite obvious that the 4 IS. A zero mark 0 is placed on the top.of the
same can be used for grinding other work.
‘plate l5 and the outer circumference of the col
In the accompanying drawings, forming part lar I1 is graduatemappropriate to the pitch of
of this speci?cation:
the thread on the screw it, so that the amount
Fig. 1 is a plan view of a valve grinding ma
or distance of movement by the screw can be read
chine adapted to grind the bevel valve seat on and determined easily. The handwheel I8 is se
the head of the valve and also the other end cured to the screw ll to rotate therewith and to
rotate the same and has the handle I! secured
Fig. 2 is a vertical section, longitudinally of the thereon to facilitate rotation of the screw. The
machine, taken on line 2-2 of Fig. 1.
screw it is externally threaded to engage in the
Fig. 3 is an enlarged section taken on line 3-3 internally threaded nut 20 rigidly secured to the
of Fig. 1 and shows the work gripping and work underside of the carriage so that rotation of ‘the
rotating and work adjusting more clearly; and
screw moves the carriage and the grinding wheel
Fig. 4 is an enlarged section taken on the line and the motor thereon transversely of the bed
l of Fig. 1 and shows the mechanism for moving to bring the latter into operative relation with
grinding machines wherein the high speed rota~
tion of grinding wheels produces vibrations quite
easily unless the bed and framing of the machine
is made quite sturdy so that the work produced '15
by the machine will be true and smooth. The
for illustration of the present invention now fol
The bed A is of su?iciently sturdy design to
deaden or eliminate as far as is possible the vibra pl 0
tions usually produced in machines especially in
'by rotation of work in the turret-like element'lis
means for locating work in the turret-like ele
A speci?c description of the grinding machine
shown in the accompanying drawings, embodying
the present invention in a valve grinding machine
of the bed. The gib l I is introduced between 20
the carriage and one of the guide ways. and the
set screw I2 is tapped into the bed and abuts the
To provide such a machine with means where
the carriage and the grinding wheel more clearly.
Similar: reference characters refer to similar
work in the turret. The graduations '2l assist in
determining the distance which the carriage has
moved or is being moved by the rotation of the
screw l4. The screw 22 is threaded into the col
lar l1 and the inner end thereof is abuttable on
the screw l4 for securing the collar in a certain.
relation rotatively of the screw. This is of ad
is threaded onto the spindle E'and holds the ball
bearing 34 against a shoulder on the shaft. The ‘
springs 45 are countersunk into the quill endwise
to exert pressure therein againstball bearing 14
and thence against the nut 44 tending to re
tain the operating end of the spindle Ev in a
de?nite relation to the front end of the quill to
vantage when the grinding wheel is to be moved ‘ prevent undesired axial movement of the spindle
relative to the quill.
a certain distance which movement can be de
10 termined by rotating the collar IT on the screw,
after releasing -‘the screw 22, to a number of
graduations corresponding to the distance to
which the grinding wheel is to be moved, then
locking the collar II by means of the screw 22
15 and then rotating the screw until the selected
graduation meets the-0 mark. By this means, the
movement of the grinding wheel is predetermined
and tends to accuracy of the machine and elimi
nates the cut and try method of siting work and
20 thereby saves considerable time in grinding of
The quill D. is closely ?tted in the carriage B
with the axis thereof longitudinally of the bed
‘The flange 46 is threaded onto the front end of
the spindle E to hold the ball bearing in place‘
and to. form the abutment wall 41 for the grind
ing wheel 48 which is mounted on the spindle E
and held thereon by the ?anged nut 49 threaded
onto the spindle E. The casing 50 for the grinding
wheel is mounted on the front end of the quill.
The‘ guard casing Si is secured to the outer end
of the carriage to inclose, as far as possible, the
rotating pulley 3B and the moving belt 4| and
the rotating spindle end 35.
The flange member 52 is journaled in the bore
53 provided in the bed and has the motor cen
tralizing pilot 54 on the lower end thereof. The
and transversely of the guide ways in and is work rotating motor F has a recess in one end
thereof engaging with the pilot I4 to centralize 25
The shaft 23 is jour
naled in the carriage B, transversely of the axis the motor relative to the ?ange l2 and to ex
of the quill, and has the pinion 24 thereon, the tend the same downwardly and into the bed and
teeth of which mesh with the teeth 25 on one side is enclosed therein.
I. The turret G has the centralizing recess in
of the quill so that rotation of the shaft 23 moves
30 the quill axially. The collar 26 is pinned to the the bottom thereof to engage with the pilot I! ex-' 30
shaft 23, the inner end thereof abuts the carriage , tendingupwardly from the flange 52. The ?ange
to ‘prevent endwise movement of the shaft in 56 of the turret abuts the top of the ?ange I2
the carriage in one direction and one end of the and also the top of the‘ bed. The screws 51 hold
pinion 24 abutting the inner end ‘of the plug 21 the turret to the top of the ?ange 52 and to the
rigidly secured to the carriage and substantially top .of the bed. and the screws 58 hold the motor 35
F‘ to the ?ange 52. The armature shaft 59 is
integral therewith, to prevent endwise move
ment of the shaft in the carriage. aThe collar journaled in the ?ange 52 and has the tongue lli
26 has the outwardly extending clutch teeth 28 on the upper end thereof.
26 axially movable therein.
The work receiving hollow sleeve BI is journaled
The quill moving handle 28 is journaled on and
movable longitudinally on the outer end'of the
shaft 23 and has notches therein to engage with
the clutch teeth 28 so that the shaft 23 can there-.
' by be rotated manually. The nut '30 is threaded
46 onto the outer end of the shaft 23 and by means
in the turret by means of ‘the bushings ‘2. v The
front end of the sleeve has the internal taper wall
63 and the rear end thereof is internally and ex
ternally threaded. The worm wheel“ is keyed
on to the sleeve 6i to rotate therewith. . One end
of the worm wheel 64 abuts . the collar 4! in 45
of the washer 3| held against a shoulder on they tegral with the sleeve and the other end abuts the
shaft 23 by .the nut 30, prevents the handle from washer 66 in internal abutment on the turret to
being _ pulled. from the shaft endwise. There is retain the sleeve in endwise relation to the tur
the space 32 between the washer 3i and the outer ret. The sleeve .61 fits axially movably into
50 end of the hub‘of the handle so that the handle the hollow sleeve 6! and may also rotate therein
when occasion demands. The sleeve 04 is slitted
' can be moved longitudinally of the shaft to manu
axially and the slits opening alternately from the
ally release the clutch teeth and notch engage
ment and to manually engage the clutch teeth opposite ends of the sleeve.‘ One end of the
and notches when desired.
The grinding wheel carrying spindle E is jour
naled in the unrotatable quill D by means of the
ball bearings 32 and 34 and has the diametrically
reduced part‘ 35 at the outer ,end thereof and
the keyway 3‘ therein. The part '35 is journaled
in the carriage by means of the ball bearing 31.
The grinding wheel driving pulley 28 has the
sleeve-like hub 38 carrying the inner race of the
sleeve 68 is of ataper corresponding to the taper
wall in the sleeve 6i and the other end is taperedv 55
corresponding to the taper of the taper wall in
the sleeve 61 so that axial movement of the sleeve.
-6‘| contracts the sleeve 68 or permits the self ex
panding thereof according to the direction of
movement of the sleeve 81.
The work gripping sleeve 69 is also slitted axi
ally so that the same can.expand and contract,‘ '
ball bearing-37. The V groove 40 in the pulley ( is preferably self expanding so that‘the same can
34 engages with the belt. 4| which also engages contract to grip work therein or expand to re
lease the‘ work according to axial movement of
66 with a similarly grooved pulleyv 42 on and rotat
able with thearmature shaft of the motor C._ the sleeve '61 and consequent diametrical move
The hub of the pulley 38 has secured therein the ment of the sleeve 68 described above.
> key} 43 engaging with the keyway 36 to rotate
‘the spindle E when the-motor C is operating.
70 When the quill moves the spindle E axially, the
diametrically reduced part 25 slides back and
forth-in'the 'hub'of the pulley 38 which is held‘
against movement away from the carriage B so
The plug 10 is threaded into the internal thread
in the sleeve ‘iii and they inner end thereof abuts
the outer end of the sleeve 61 so that rotative 70
movement of ‘the plug moves ‘the sleeves 41 and
68 axially with consequent gripping and releasing
of workas above described. The plug 10 has the, .
that the pulley 28 and the belt 4i always retain ‘ diametrically enlarged head ‘I i-for ease of§manual
76 the same relation-to the pulley 42. The nut 44. manipulation of the work gripping element. The 75
3 ,
end abutment member ‘I2 extends slidably through and‘ has the wheel dressing element 88 mounted
the plug 10 for axial adjustment thereof and the" in the tort thereof to move transversely therein '
inner end thereof abuts the end of the stem of‘ for adjustment thereof relative to the grinding
the valve ‘I8. A series of grooves 14 are provided wheel. ‘The screw I00 is vfor locking the wheel
on the abutment member 12 and areaxially dressing element in adjusted position. Thescrew
spaced thereon to accommodate di?'erent lengths IOI is for holding the post 88 against rotation and
of valve stems. The ball 15 is mounted in the
abutment member 12 and is pressed into the cor
responding groove by the spring‘l8 held in abut
ment on the ball by the screw 11, threaded into
the abutment member ‘I2. A] manual, axial pull
or push on the abutment member moves the
ball into the abutment member during adjust
ment of the end of the adjusting member. When
15 one of the grooves .comes oppositethe ball, the
spring ‘I6 seats the ball in that groove and re
tains the abutment member 12 against axial self
movement. The head ‘I8 is provided on the end
of the abutment member for easy and convenient
20 manual movement of the same.
The worm shaft 18 is journaled in the turret
by means of the ball bearings 80 and 8| and the
axis of this shaft is in alinement with the axis
of the motor F. The slot 02 traverses’ the lower
end'of the shaft 18 to engage with the tongue 80
for driving the shaft ‘I8 by the motor and easy as
sembling and disassembling of the turret and the
motor. The worm threads 83 are provided on
the shaft ‘I8 to mesh ‘with the teeth on the worm
30 wheel 64 so that the sleeve and work and mecha
nism therein and thereon will be rotated when
the armature shaft of the motor F rotates. The
axis of the sleeve 6| is spaced to one side of the
axis of the worm shaft ‘I8 which is also the'axis
35 upon which the turret pivots.
On the opposite side of this axis of pivot of the
turret is another work receiving element in the
form of the V block 84. The axes of the sleeve
GI and of the V block 84 are parallel in the in
40 stance shown and described. When, faces are
to be ground angular to that, shown, the axes of
the sleeve 6| or of the V block 84 may be rela
tively inclined to attain that end.
also in vertical adjustment when such is nec-' '
The bar I02 has one end thereof pinned to the
casing for the\ grinding wheel and extends
through the bosses I03 and I08 on the carriage.
The collar I05 is pinned to the bar I02 to form
a stop ~means for backward movement of the
grinding wheel. The collar I08 is adjustably
telescoped over the bar I02 and is movable lon
gitudinally of thebar I02 and adapted to be held
in adjusted position on the bar by the set screw
The motors C and 'F are connected'to the same 8
source of electricity but each has its own leads
from this source. A switch is introduced in the
circuit for the motor F and the part H of this
switch extends upwardly sufliciently far to be
contacted by the collar I06.
The axis of the turret is located at one side 25
of ‘the axis of the grinding wheel so that the
latter can operate on work in the turret.
The grinding wheel with its sleeve is moved
transversely of the bed by the screw I l which
moves the carriage transversely of the bed and
is moved longitudinally of the bed by the handle
28. Both of these movements are attained manw
ually to bring the grinding wheel into operative
relation with the work in the turret.’ These
same manual movements also bring the grinding 35
wheel into wheel dressing relation with the wheel
dresser 88.
A valve ‘I3, to be machined, is inserted endwise ‘
into the work holding sleeve 6| while the work
gripping mechanism therein is expanded by ma 40
nipulation of the plug 10 until the end of the
valve stem abuts ‘the inner end of the abutment
‘ member 12 whereupon the valve is'gripped in 7
The laterally spaced guide posts 85 and 88 are the sleeve 6| with the end thereof in abutment
45 each axially movable in the turret, below the V on the member 12 and ‘the head of the valve pr0-_
block, and are connected by the work abutting‘ jecting some distance out of and beyond the out 45
bar 81 which has the zero mark 0 'on the upper side of the turret.
- side face thereof. The adjusting screw 88 is‘
The turret is then manually indexed so that
threaded through the turret, below the V block the head of the valve is located toward the grind
and substantially midway between the guide ing'wheel. The axis of the work holding element ’
posts, and is joumaled in the work abutting bar. is then angular with the axis of the grinding
The collar 88, integral'with the head 80, has the wheel substantially as shown. _
graduations 9| thereon appropriate to the pitch
The grinding wheel is then brought to operate
of the thread on the screw 88 so that adjustment on the valve head by means of ‘the handwheel l8
55 of the bar 81 can easily be seen and determined , and the handle I 8. .The grinding wheel is then
without any other measuring instrument.
The stub 82 isthreaded into the turret and in
a shoulder abutment thereon and has‘ a ’part_
thereof projecting outwardly of the turret. The
index pin 83 extends through and fits axially
slidably in the stub 82. The inner end of the
index pin 88 has the nose 94 formed to engage
the notches 85 in the ?ange 58. In the present
instance, the notches are diametrically opposite
moved back and forth ‘over the bevel surface of 55
the valve head so that the outer circumferential
surface-of ‘the grinding wheel moves over'the
bevel surface of the valve head and therebyv
grinds the same to the bevel shown; the turret
being indexed to attain that bevel. The switch
for the motor F is, then closed so that the motor -
rotates the work in the turret. When the grind~
ing of the bevel surface is ?nished, the grinding
and there are two positive stations to which they wheel is moved backward sufficiently far until the
turret can be indexed. The number of notches collar I06‘ contacts and moves the switch part H
can be increased or decreased when a different and thereby opens the switch in the circuit for
number of stations are required.
the motor F and stops the motor and'thereby
The head 86 is pinned to the index pin 88 for stops rotation of the work in the turret. ‘The
70 ease and .convenient manual operation of the in
dex pin.- One end of the spring 81 abuts a shoul—
der in the stub 82 and the other end thereof abuts
a shoulder on index pin and normally tends to
retain the nose 84 vin the corresponding notch.
The post 88 extends from the top of the bed
‘work is then released by rotative movement of
the plug 10 so that the ?nished valve can easily '
be removed from the turret and a new one in
serted in place thereof and gripped in the turret
as above described;
The valve is then reversed so that the head 75
thereofisinw'ardlyoftheturret andislaid into , comprising, a stub threaded‘ into said bed. a tur
ret retainingand releasing pin axially movable
in said stub, the inner ‘end of said pin formed
of the valve abuts endwise on, the abutment, ll
to engage with said notches, a manually take hold
collar on the outer end of said pin, a shoulder s
5 of the turret as shown. The turret is then manu
‘ally indexed to bring the outer end of the stem .- on said pin, a shoulder'on said stub, and av spring
into operative relation for the grinding wheel _, between said shoulders to normally hold said in-,
andtheendofthestemofthevalve extendsout
which is then brought forward manually by
means of the handle 20 so that the outer ?at face
-10' of the grinding wheel is in line with the end
‘ of the "valve stem. The grinding wheel is then
I moved transversely of the. bed by means of the
handwheel ll to feed the end face thereof across
the end of the valve stem. The indexing of the
ner end of said' pin'in one of said notches;
3. Ina grinding machine, a bedra grinding
wheel movable‘ transversely and longitudinally 10'
of said bed, a work holding turret on said bed and
adapted to simultaneously hold a plurality of
work pieces and being in cooperative relation to
- said grinding wheel, and a manually operated
grinning means for holding work in said turret is
comprising, a sleeve in said turret and having an
internal taper wall .at. one end thereof and an
external and an internal thread at the other, a
15 turret is arranged so that the axis»of the'v
blocks is parallel with the axis of the grinding
wheel when the end of the valve stem is to be
machined square to the axis of the valve. When
angularity is desired for the end of the valve stem,
20 relative to the axis thereof, the indexing of the
turret must be changed accordingly either by
second. sleeve axially movable within said sleeve
and having an internal taper wall at the inner ~20
end thereof, a radially self expanding work
adjustment of the turret about its pivot axis or by ' gripping member within said sleeve adjacently to
changing the index notches in the ?ange 52. said second sleeve, one end of said member con
forming to and engaging with said taper wall
When the grinding wheel is being brought for
25 wardly for operation of valves or other work, the in said sleeve and the other end thereof conform- :5
switch member H is released, the switch closes _ing to and engaging with said taper wall‘ in said
second sleeve, a manually operated work gripping
‘the circuit of the motor I", and the work is there
by rotated in the turret.
and releasing‘ plug threaded into said internal
The machine shown and described is econom
30 iical of structure, easy and convenient of opera
.thread to move said second sleeve axially and
tion, grips and automatically rotates work in
the turret and automatically stops rotation of
the work when grinding thereof is finished. All
operating means of the machine are manually
35 operated except the driving of the grinding wheel
and the rotation of the work in the turret.
’ .
It is quite obvious that changes of structure
and arrangement of the parts, from that shown
thereby move said work grippingmember axially 30
for gripping and releasing of work, a take hold
means on said plug for ease of rotating the same,
an abutment memberfor the ends of work ex
tending through said plug, an adjusting means
between said abutment member and said plug as
to adlustably vary the axial relation of work to
said turret, means in said plug for retaining said
abutment member in adjusted position, and a
and described can be made within the scope and lock nut threaded onto said external thread in
40 spirit and intent of the present invention and of said sleeve and abutting on said turret to retain .4.
the appended claims. Therefore, having shown said sleeve in relation to said turret.
4. A bed-sturdy to mitigate vibrations produced
and described our invention and without limiting‘
therein, a driveniwork'v grinding wheel mounted ‘
ourselves to the, precise structure and arrange
*ment of parts as is shown and described herein, on said-bed to move transversely and longitudi
nally thereof, a work receiving turret on said bed _4s
‘45 We claim:
1. In a grinding machine, a bed, a grinding and being pivotally indexable about the ‘axis of
wheel carrying carriage guided to slide trans the turret, work holding means on said turret for
versely of said bed, a quill unrotatable but axially simultaneously holding each of a plurality of
movable in said carriage longitudinally of said work pieces at a side of the axis of pivot of said
'50 ‘bed and transversely of the guiding slide for said turret, one of said work holding means including 1.
carriage and having a rack thereon, a ‘shaft a rotatable sleeve iournaled in said turret and
journaled in. said carriage andr having a pinion having means to grip a work piece intermediate
thereon engaging with said rack for movement the ends thereof, a power means for rotatingsaid
» of said quill, ‘an operating handle iournaled on sleeve, a manually operated means for indexing
5‘ and movable axially on said shaft,.cooperating said turret, a manually operated means forimov- ,ll
- clutch teeth between said shaft and said handle ing'said grinding wheel on said bed. a manually
to eifectengagement of said handle with said operated means for gripping and releasing the
' shaft for rotation of said shaft and axial move
ment of said quill and to eifect release of said
go handle from said shaft for individual rotation of
said handle, and a work holding turret on said
bed and adapted to simultaneously hold a' plural
ity of work pieces and being spaced to bring the
work therein into positionfor- operation thereon
55 by said grinding wheel,
2. In a grinding machine, a bed, a grinding
wheel movable ‘transversely and longitudinally of
' said bed, an indexable work holding turret
mounted on said bed and adapted to simultane
‘ 70 ously hold a plurality of work pieces and being
in cooperating relation to said grinding wheel
and having indexing notches therein, and a
manually operated retaining‘ means for said tur- -
ret ‘when the same .is indexed and releasing
1| means for permitting indexing of said turret
work piece in said sleeve, and means operated by
a definite movement of said grinding wheel rela
tive to said bed to startand stop rotation of said .00
sleeve by said power means.
5. In a valve grinding machine, a bed, a car
riage guided on‘ said bed to move transversely
thereof, an unrotatable quill axially movably sup
ported in said carriage, a grinding wheel carrying es
shaft Journaled in said quill, a motor on said
carriage for driving said shaft, a turret indexable
abouta ilxed axis on said bed and having means
for simultaneously holding two sidewis'e spaced
valves‘ at opposite sides of the axis of pivot of the ,7.)
turret and in end for end relations and thereby
leaving exposed the head end of one valve and
the tail end of the other forsuccessive operation
thereonby the grinding wheel after correspond
ing‘indexing' of said turret, and means engaging 7g
said quill for moving the grinding wheel into and
out of grinding relations with the corresponding
in threaded engagement with said carriage for
moving said grinding wheel into position for
ends of the valves.
6. In a grinding machine, a bed, a work grind
ing wheel movable transversely and longitudinal
operating on work in the machine, a turret index
able on said bed and having spaced work hold
ing elements each eccentric with the axis of in
ly on said bed for operating on work in the ma
chine, a turret pivotally indexable on said bed,
axis and leaving an end of each work piece ex
work holding means on said turret each sidewise
of the axis of pivot of said turret and the axis
10 of each angular with the axis of pivot of said
turret, said work holding means simultaneously
holding the work pieces in end for end relation
ship and leaving opposite ends of each exposed
for operation thereon by said grinding wheel, and
dexing of the turret and each angular with said
posed for operation thereon by said grinding
wheel, and means for indexing said turret to suc
cessively bring the exposed parts of the work 10
pieces in said turret into position for operation
thereon by said grinding wheel.
10. A bed, a grinding wheel movable trans
versely to' and longitudinally reciprocatingly rel
means for moving said grinding wheel into opera
ative to said bed, a turret in a position on said 15
tive relationship with the corresponding ‘end of
bed and being indexable about the axis thereof,
one of the work pieces in said turret after each
work holding elements on said turret sidewise
of the axis of pivot of said turret, the axes of
indexing of said turret.
7. A bed, a grinding wheel positionally and re
20 ciprocatively movable on said bed, an indexable
turret on said bed in co-operative relationship
with said grinding wheel, two laterally spaced
work receiving elements in said turret, both ec
centric with the axis of indexing of said turret,
each to receive a similar work piece one with
one end thereof directed toward said grinding
wheel and the other with the corresponding end
thereof directed away from said grinding wheel,
means to index said turret to de?nite stops there
30 of and thereby successively presenting opposite
ends of the work pieces in said turret for opera
tion on opposite ends by said grinding \wheel,
and means for moving said grinding wheel‘ into
operative relationship with the corresponding
35 ends of the work pieces.
8. A bed, a carriage movable transversely on
said bed, a grinding wheel and driving motor
therefor mounted on said carriage, a grinding
wheel carrier unrotatable and axially movable in
40 said» carriage, a driving connection‘between said
motor and said grinding wheel, a turret indexable
on said bed and being in spaced relation to said
the work holding elements being angular with the
axis of pivot of said turret, at least one of said 20
work holding elements being rotatable, each of
said work holding elements leaving one end of
the work piece therein exposed for operation
thereon by said grinding wheel, and a rotating
means for said one work holding element com
prising: a work gripping sleeve rotatable in said
turret and having a worm wheel ‘thereon, a shaft
journaled in said turret and having a worm
thereon in mesh with said worm wheel, a motor
carried by said turret, and one end of the arma 30
ture shaft of said motor in driving relation with
said shaft.
11. In a grinding machine, a vertical bed hav
ing a horizontal top, a grinding wheel mounted
on said top to move longitudinally and trans 35
versely thereon, an indexable turret mounted on
said top in spaced relationship with said grinding
wheel, means in said turret for simultaneously
holding a number of cylindrical work pieces inde
grinding wheel, a plurality of work receiving
pendent of each other and sidewise of and angu 40
lar to the axis of pivot of said turret and leaving
both ends of each exposed, one of said work
holding means being rotatable, means for rotat
means in said turret and the axis of each being
ing said one work holding means, means on the
45 eccentric and angular with the axis of indexing
of said turret, means to index said turret for
bringing parts of the work pieces in said turret
into operative relation with said grinding wheel,
and means for moving said grinding wheel into
' and out of grinding relation with the work pieces
50 held in said turret.
9. A bed, a carriage guided to move transverse
ly of said bed, a. grinding wheel and a driving
motor therefor mounted on said'carriage, said
grinding wheel being axially movable relative to
said carriage, a screw journaled in said bed and '
outside of said turret for manually gripping a 45
work piece therein, means on the outside of said
turret for manually indexing the same, said in
dexing successively bringing respective ends of
the work pieces in said turret into position for
operating thereon by said grinding wheel, and a 50
moving means for manually bringing said grind
ing wheel into operative relationship with the
exposed ends of the work pieces in said turret.
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