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Dec. 31,' 1946.
o. T. PIEPER
2,413,334
GRINDING MACHINE
Filed June 16, 1943
4 sheets-sheet' 1
De@ 31, 1945.
’
_ 0.1', PIEPER
2,413,334
GRINDING MACHINE
Filed June 1e, 1945
’4 sheets-sheet 2
Dec. 3l, 1946.
o. T. FâlEPER
GRINDING MACHINE
Filed June 164, 1943
7
m.\.
4Í///////////////////
2,413,334
c. 3l, 1946.
y
O;
PlEPER
2,413,334
GRIIÍNDINGk MACHINE
Filed June _16, 1943
4 Sheets-Sheet 4
2,413,334
Patented Dec. 31, 1946
UNITED STATES, PATENT or1f1ce~v
2,413,334
GRINDING MACHINE
Oliver T. Pieper, Wilmington, Del., assignor to
Lobdell Company, Wilmington, Del., a corpora
tion of Delaware
Application June 16, 1943, Serial No. 490,965
15 Claims. (Cl. 51-134)
1
2
The present invention relates to grinding ma
chines and more particularly to knife grinding
machines.
While the grinding machine of the present in
vention may be used to grind or sharpen knives
of many different types of cutting tools, it is par
ticularly adapted for grinding or sharpening
grinding machine having means for passing a
multiplicity of knives across the face of a revolv
ing grinding wheel in a manner to cause the face
of the Wheel to take successive cuts across the
cutting' edge of each of said knives, one with the
wheel rotating towardA the knives land another
with the wheel rotating away fromthe knives.
. The invention also aims to provide further im
knives` of chippers used for chipping pulp logs
provements 'and refinements in the turret‘grind-H
ground singly by moving them horizontally/'across 10 ing machine art, including the provision of novel
drive assemblies for rotating the grinding wheel"`
a suitable grinding wheel. This method of grind
and turret witheitherone or two motors ;_ a novel
ing, while satisfactory‘when only a, few knives
compact control station in front of the ‘turret
have to be ground, is relatively slow and not suit
from which the blades may be gauged, the wheel
able where large numbers of knives must be
ground.
15 adjusted and the turret started and stopped, to
gether with a novel design andarrangement _of
It is accordingly the primary object of the pres
parts whereby the various operations may be car
ent invention to provide a novel grinding ma
or similar purposes. Such knives are now usually
ried out, and further subordinate improvements
chine for grinding a multiplicity of knives ‘at one
setting of the machine.
A further important object is to provide a grind
20>
to be hereinafter pointed out.
Still further objects will appear from the fol
lowing description and appended claims Íwhen
ing machine having a rotating turret for hold
read in conjunction with the attached drawings
ing a multiplicity of knives, with novel means for
wherein
'_
1
insuring positioning of the knives to locate their
Figure 1 is a side elevational view of a grinding
cutting edges in a common plane, whereby they
will each travel in a predetermined path across 25 machine illustrating a preferred embodimentY of
the invention wherein certain parts are in sec
the face of a grinding wheel in response to ro
tation of the turret.
Another object is to provide a turret type
grinding machine with novel adjustable knife
supporting chucks for positioning the multiplicity
of knives with their cutting edges in a common
ai
ure 1.-
Y
l
Figure 2 is a rear elevational view of the grind
ing machine of Figure l;
grinding plane.
A still further object is to provide a turret'I type
grinding machine with gauging meansI designed
to assure the positioning of each of a multiplicity
of knives with their cutting edges in a common
plane, and which forms a part of the machine
but which may be readily removed out of the way
upon conclusion of gauging.
tion'fo-r clarity of illustration;
Y Figure la isa detailed View illustratingl thecompound lever 58 of the gauging means of Fig-`
n
Another object resides in mounting the grind
ing wheel of a turret type grinding wheel for
'
‘
Figure 3'is a front elevational view_of the grind- `
ing machine of Figure 1;
'
‘ ' Figure 4 is a side elevational view of the oppo
site side ofthe grinding machine shown in li‘ig-I
ures 1 to 3; '
4
-Figure 5 is a transverse sectional view taken
substantially on the line 5_5 of Figure-1;
Figure 6 is a iragmental longitudinal sectional
view of the grinding wheel and spindle taken sub-V
stantially on the line 6-6 of Figure 4;
movement in novel manner toward or away from
l.Figu'reï is a ~fragmental plan view of a part cf‘
the turret, to position the grinding wheel in the
the mechanism employed for moving the'grind
path of the knives carried by the turret.
'
A further object resides in providing a turret 45 ing wheel toward and away from the'turret; ‘
_ Figure 8 is a top plan view of a modiñed form
type grinding machine, having a knife gauging
of-~ grinding machine embodying the present in
device, with a novel turret drivingvmechanism in
vention with certainrparts removed for clarity of:>
cluding a shiftable member which is automati
illustration;
Y
cally movable into non-driving relation when the
Figure 9 is a longitudinal sectional'view through
gauging means is moved into a gauging position, 50
the grinding wheel and spindle of the grinding
to preclude driving the turret while gauging is
machine of Figure 8;
being carried out.
Figure 10 is a fragmental rear elevational view
A still further object is to provide a turret type
of the grinding machine of Figure 8;
grinding machine with a grinding wheel mov
Figure 11> is a fragmental sectional view taken
able radially with respect to the axis of said tur 55
substantially on' the line lI-ll of Figure 8 with.
ret, so-as to bring the axis of the grinding wheel
the parts omitted in Figure 8 shown in full lines;
into predetermined intersecting relationship to
and
the path of movement of the knives carried by
Figure 12 is ya detailed Vsectional View on line
the turret.
Another object is to provide a turret type knife GO lZ-I2 oi-Fîgure 11. . " I ..:
2,413,334
4
3
member 31 when clamp bar 43 is loosened. Such
movement is effected by cap screws 4| threaded
into bosses 39 and abutting the inner end of work
pieces K. By this means, work pieces K are
brought into position for grinding with their
With continued reference to the drawings
wherein like reference characters are employed
throughout the several views of the drawings to
indicate the same parts, a grinding machine made
in accordance with the present invention com
ground surfaces in a common plane.
prises a supporting base B; a turret supporting
To assure the proper positioning of each Work
framework F carried by said base; a turret T ro
piece K, the gauging means L about to be de
tatably mounted on said framework and designed
scribed is used. Means L is pivotally mounted on
-to move a plurality of knives K or similar work
a shaft 5| having its ends pivotally mounted in
pieces through a circular path; a speed reducing
spaced arms 52 of a bracket 53 fastened in any
gearing G driven by an electric motor M; a spin
suitable manner to a flat supporting base 54 inte
dle housing H mounted on base B in spaced rela
grally formed on sleeve 22 and comprises a stand
tion to framework F with its axis parallel thereto;
ard 55 non-rotatably mounted on shaft 5|. The
a grinding wheel W and its associated spindle
mounted for rotation in housing H with its axis 15 axis of shaft 5| is disposed at right angles to the
axis of shaft 23 and is retained in its right an
intersecting vthe circular path of knives K; driv
gular relationship by the spaced arms 52. At its
ing means for wheel W consisting of either a
upper end, arm 55 is provided with a dial gauge 56
separate electric motor M' or a drive shaft D di
having a vertically extending contact arm 51
rectly connected to the shaft of motor M; Work
adapted to slide axially in the casing of gauge
locating or gauging means L mounted on frame
56. Arm 51 is operatively connected through
work F and designed to be selectively moved into
suitable gauge mechanism (not shown) to the
contact with knives K or similar work pieces car
dial of gauge 56 so as to operate gauge 56 in ac
ried by turret T to locate the knives K or similar
cordance with the axial position of arm 51.
work pieces in a common plane; and advancing
means A for moving grinding wheel W into grind 25 Since the details of gauge 56 form no part oi
the present invention and may vtake any suitable
ing position with respect to At-he common plane
form apparent to those skilled in the art, a de
of knives K or similar work pieces carried by
tailed description thereof will not be given in this
turret T.
application.
Turret and work supports of Figures 1 to 7
30
Referring for the present to the embodiment of
Figures 1 to '7, framework F is secured to base B
in any suitable manner and comprises a pair of
forwardly and rearwardly spaced, upwardly ex
tending, supporting standards 20 interconnected
at their lower ends by a base plate 2| and their
upper ends by a supporting sleeve 22. Sleeve 22
rotatably supports a hollow shaft 23, the front
end of which non-rotatably supports hub section 40
Operation of gauge 56 is effected through a
compound lever 58 pivoted at 59 on standard 55
(Fig. 11). A coil spring 6| having one end se
cured to arm S2 of lever 58 (Figure 1A) and the
other end to a pin 63 carried by standard 55 nor
mally biases lever 58 in a clockwise direction into
engagement with a stop pin 64 mounted on stand
ard 55. Referring to Figure 1A, the other arm 65
of lever 6| is provided with a ztapped opening 66
designed Ito 4threadedly receive a contact pin G1
adapted to engage the ground surfaces of the
24 of turret T and .the rear end of which non-ro
work pieces when standard 55 is in its operative
tatably supports a driven gear 25. Any suitable
position as shown in Figures l and 2.
bearings (not shown) may be employed between
Between contact pin 61 and shaft 5|, standard
55 is provided with a pair of spaced L-shaped
sleeve 22 and shaft 23 to assure free rotation of
shaft 23 and to take the end thrust of .the shaft. 45 brackets 68 equally spaced transversely of a ver
tical plane containing the axis of shaft 23. As
Turret hub 24 is provided with twelve bolt holes
clearly shown in Figures 1 and 3, brackets 68
arranged in sets of three equally spaced in each
span chucks 33 and retain turret T in position
quadrant and designed to freely but snugly re
with one of its arms 28 vertically disposed when
ceive bolts 26 which are threaded into suitably
tapped openings in the inner ends 21 of four out 50 standard 55 is in its operative position and pre
vent inadvertent rotation of the turret during
wardly extending chuck supporting arms 28. The
adjustment of the Work piece carried by the ver
edges of the outer ends of arms 28 are enlarged
tical arm. An adjustable stop screw 10 threaded
at 3| (Figure 1) to provide pivots 32 designed to
into standard 55 and extending toward turret
pivotally receive adjustable work supporting
chucks 33.
55 T into abutting engagement with the underside
of web 31 of chuck 33 locates standard 55 in
Each chuck 33 comprises a pair of side plates
the same vertical angular position with respect
34 having a pivot opening to .receive pivots 32
to chucks 33 to assure proper setting of each
and a slot 35 to freely and slidably receive the
knife K in a set to be ground.
shank of lock screws 36 threaded into suitable
While any suitable means may be provided for
openings in enlarged portions 3| of arms 28. Ad 60
moving standard 55 from its operative position
jacent their uppermost edges, plates 34 are inter
to its inoperative position, this movement is pref
connected by an integral cross-member or web 31
erably effected by a rock lever 1| keyed to shaft
having an upstanding flange 38 at its innermost
5| at 12 so that movement of lever 1| about the
end. Intermediate its ends flange 38 is provided
with a tapped boss 39 designed to receive a cap 65 axis of shaft 5| causes a corresponding move
ment of shaft 5| and standard 55. Lever 1| is
screw 4|, the axis of which is parallel to the upper
preferably provided with a spring pressed pawl
surface of member 31 and slightly spaced there
13 pivoted on lever 1| and biased in a counter
from. The upper surfaces of side plates 34 adja
clockwise direction by a spring 14 surrounding a
cent their outer ends are tapped to receive cap
trip shaft 15 one end of which is pivoted to the
screws 42 designed to secure a clamp bar 43
outer end of pawl 13 and the other end of which
_against work pieces K to secure them in sockets
is pivoted on a hand operated trip lever 16 piv
formed by -the upstanding edges of side plates 34,
otally mounted adjacent the upper end of lever
member 31 and fiange 38. As clearly seen in Fig
1|. Pawl 13 cooperates with a ratchet arm 11
ure 3, work pieces K ñt snugly against side plates
34 and are guided thereby for movement 4along 75 integrally formed on bracket 53 and provided
2,413,334
with three equally spaced notches 18 (Figure 1),
the one at the left retaining standard 55 in
operative position with respect to turret T, the
center one retaining standard 55 in an inter
mediate position but non-cooperative position
with respect to turret T and the right hand one
retaining standard 55 in its inoperative position.
During adjustment of knives K, rotation of
opening, semi-annular, seat |01 for slidably `re
ceiving housing H and a complemental, semi
annular, cap |08, which is designed to retain
housing H on seat |01 upon tightening cap screws
|09 carried by flanges | i l of cap |08 and threaded
into flanges |52 of pillars |03. Cap |08 and pil
lars |03 and §04 are so designed that tighten
ing of screws |09 will not bind housing H. As
a consequence, housing H, spindle 88 and wheel
turret T by motor M is disrupted so that turret
T4 may be manually rotated step-by-step to suc 10 W may be slid axially along seats |07 to bring
the cup face of wheel W into grinding relation>
to knives K after the knives have been brought
into proper grinding position in chucks 33 by
mechanism for accomplishing this end may be
the means previously described without leaving
employed, the present embodiment of the inven
tion contemplates an automatic lockout mecha 15 the front of the machine.
While this axial movement may be elîected in
nism, to be hereinafter described in detail, oper
any suitable manner, the present invention con
able upon movement of lever '1| and standard
templates advancing means A operable from the
55 to the intermediate position with pawl 13 in
front of turret T. To this end, pillar |03 is pro
the center notch 18 of ratchet arm 11.
20 vided with an elongated boss H3 adapted to re
Grinding wheel and spindle construction of
ceive a supporting bracket ||4 secured thereto
Figures 1 to 7
in any suitable manner. Bracket I|4 provides a
cessively position each arm 28 in cooperating
relation with brackets 69. While any suitable
Grinding wheel W may take any suitable form
but preferably comprises a cup wheel having its
cup face toward turret T and its axis parallel to
hollow shaft 23 and substantially intersecting theA
path of movement of knives K. Referring par
pair 'of right angularly disposed, upwardly ex
tending arms ||5 and I|6 terminating in journal
supports ||1 and ||8 having their axes at right
angles (Figs. o-7).
Support ||1, as clearly seen in Figure '1,
journals the unthreaded portion | I9 of a lead
ticularly to Figure 6, Wheel W is preferably piloted
screw |2| which isheld against axial movement
on an annular flange 8| formed on a radial
therein by a positioning collar |22 and the hub
30
flange 82 of a hub 83 and is clamped against a
of a bevel gear |23 non-rotatably mounted on the
radial face 84 of flange 82 by annular clamp
end of screw |2| and held against axial move
plate 85 drawn into clamping engagement by
ment by nut |24 threaded on the end of screw l2 I.
cap screws 86 passing freely through ñanges 8|
The opposite end of lead screw |2| is threadedly
and 82 and threaded into suitably tapped aper
engaged in a threaded opening |25 formed in the
tures in clamp plate 85. Hub 83 is keyed on
lower section |26 of a two part collar |21 embrac
the tapered end 81 of a spindle 88 and held
againstaxial movement by a nut and washer
ing housing H so that rotation of lead screw |2|
assembly 83. Spindle 88 is rotatabîy supported
adjacent its opposite ends in spaced combined
radial and end thrust bearings 39 and 90, such
The upper mating or cap section |28 of collar
feeds said collar and housing along screw |2|.
|21 is operatively associated with section |26 by
cap screws |29 freely passing through apertures
as Timken tapered roller bearings, mounted in
|3| in flanges |32 of lower section |26 and
spindle housing H with their inner axial faces of
threadedly engaging in tapped apertures (not
their outer races abutting spaced, inwardly ex
shown) in flanges |33 of upper section |28 so
tending, annular flanges 9| formed in housing 45 that upon tightening of screws |29 collar |21 Will
H. Bearing 89 has a forced fit on spindle 88 so
be nonmovably clamped to the end of housing H.
that a nut 92 threaded on spindle 88 and abut
Meshing with gear |23 is a bevel gear |34 non
ting against the innei- race of bearing 90 will
rotatably secured to one end of a shaft |35
take up end play in spindle 88 and bearings
journalled in support | | 8 so that the axes of gears
89 and 90.
|23 and |34 are at right angles. Shaft |35 is
The opposite ends of spindle housing H are
non-rotatably but slidingly associated with a
bevel gear |36 through a keyway |31 extending
closed by co-ver plates 33 secured to housing H
from the opposite end of shaft |35 to a point
by cap screws 94. Cover plates 93 are provided
adjacent support || 8 and a suitable key |38 in
with oil seals 35 adapted to engage spindle 88
the hub |39 of gear |36. A suitable nut |4|
and prevent loss of lubricant from a lubricant
threaded on hub |39 secures gear |36 against
reservoir 96 provided in housing H between an
axial movement in a journal bracket |42 carried
nular ñanges 9|.
by a gear shield |43 surrounding gear 25 and
The other end 31 of spindle 88 is reduced in
carried by a suitable frame member |44 extend
diameter and provided with a belt pulley 98
which is keyed to spindle 88 at 99 and retained 60 ing upwardly from base B (Figure 1).
Gear |36 in turn meshes with a bevel gear |45
against axial movement by nut and washer as
carried by a shaft |46 suitably journalled in
sembly |00. A suitable wheel guard |0| car
hollow shaft 23 and extending forwardly beyond
ried by housing H and provided with an arcuate
turret T and provided with a suitable handwheel
opening | 82 having the axis of turret T for a cen
|41 accessible to an operator standing in front of
ter encloses Wheel W and permits knives K to
turret T. From the foregoing description, it will
pass across wheel W in grinding contact during
be clear that after the operator has made the
operation of the machine.
necessary adjustments of knives K carried by
While spindle housing H may be mounted in
turret T from the front of turret T, he can then
any suitable manner on base B, it is preferably
grasp handwheel |41 and rotate it in the desired
mounted so as to be adjustable axially and radi
direction to cause axial movement of housing H,
ally with respect to turret T. To this end, hous
spindle 88, wheel W and guard |01 through rota
ing H is carried by a pair of axially spaced,
up-standing pillars |03 and |04 which are bolted
tion of shaft |46, bevel gears |45 and |36, shaft
to a transversely slidable base |05 by bolts |08
|31, bevel gears |34 and |23 and-lead screw | 2|
(Fig. 4). Each of said pillars has an upwardly 75 cooperating kwithv collar |21 . so> as to dispose
2,413,334
7
8
wheel W in proper grinding position as deter
mined by the adjustment of knives K.
While rotation of housing H in seats |01 would
be resisted to a certain extent by collar |21 and
|68 and designed to cause axial movement of rod
|68 but permitting free rotation of rod |68 with
respect to yoke |12. Yoke |12 is adjustably con
nected to a clevis |13 by a threaded rod |14 and
clevis |13 is pivotally connected at |15 to a rock
arm |16 non-rotatably carried by a rock shaft
|11 journalled in a bracket |18 mounted on base
2| of framework F. An angularly disposed rock
arm |10 is also non-rotatably connected to rock
lead screw |2I, further means for resisting this
rotation is deemed desirable. To this end, a two
part collar |5| is tightiy secured on the housing
and is made up of a cap section |52 and a lower
section |53 having a depending portion |54 ter
minating in an elongated, transversely disposed 10 shaft |11 and is pivotally connected at |8| to a
base |55 having sliding contact with base |05
and a key |56 on base |55 cooperating with a
longitudinally extending keyway |51 in base I 05 is
provided. Due to key |56 and the wide contact
with base |05, collar |5| will adequately serve
to resist rotation of housing H and at the same
time positively guide it in its axial movement.
Radial movement of wheel W, spindle 88 and
base |05 with respect to turret T is also provided
link |82 which is connected to a rock lever |83
non-rotatably mounted on shaft 5|. The levers
1|, |16, |19, |83 and link |82 are so proportioned
that counterclockwise movement of lever 1| from
its extreme right hand position as viewed in Fig
ure l to its intermediate position disengages
clutch member |61 and disables the drive to tur
ret T. Further counterclockwise movement of
lever 1| to bring gauge means L into operative
to assure proper positioning of the axis of wheel
position merely moves member |61 further with
W with respect to the path of movement of
o'ut any effect upon the driving connection be
knives K. This movement is accomplished by
tween shaft |5| and gear |65.
mounting base |05 for transverse sliding move
Shaft |6| is driven by gear |84 mounted on
ment on base B. To this end, base B is provided
the end of shaft |6| and meshing with a pin
with T slots | 58 which receive T bolts |59 carried
ion |85 (Figure 2) secured adjacent one end of
by base |05 and a rack and pinion feed mech
a countershaft |86 journalled in walls |63 and
anism of conventional design is disposed between
|81 of gear case |64. At its other end counter
base B and base |05. As shown in Figure 4 this
shaft |86 is provided with a gear |88 which
mechanism includes a, shaft |60 mounted in the
meshes with a drive pinion |89 suitably secured
base |05 and carrying a pinion at its inner end 30 to a drive shaft |9| which derives its power from
as shown in dotted lines, in mesh with the
motor M through drive pulley |92 mounted on
toothed rack |60’ suitably fixed to the base B.
motor shaft |93, belt |94 and pulley |95 mounted
It is suñìcient that the T slots |58 and rack be
on drive shaft ISI. While any suitable belt drive
positioned normal to the axis of spindle 88 to
may be employed, it is preferable to use a V-belt
assure proper movement of base |05 and its asso
drive like that illustrated in detail in Figure 4
ciated mechanism.
wherein the belt drive for wheel W, to be presently
Since this adjustment is infrequently required,
described, is illustrated.
access to the pinion shaft is provided at the rear
Shaft |9| is also preferably provided with a
of the machine as clearly indicated by reference
pulley |96 which is designed to drive a coolant
to Figures 2, 4 and 5.
'
pump (not shown), which forms no part of the
present
invention, through belt |91, pulley |98
Turret and wheel drives of Figures 1 to 7
and shaft |99. It is to be understood that any
While any suitable driving means may be pro
other suitable coolant supply system may be em
vided for turret T and wheel W, this form of the
ployed ard that pulleys |96 and |88, belt |91 and
invention contemplates an electric motor M and
shaft |99 may be omitted without departing from
speed reducing gearing G for driving turret T
the present invention.
and a second electric motor M’ for driving Wheel
Variation of the tension on belt |94 is obtained
by counterclockwise movement of motor M and
W.
Referring to the turret driving means, a driven
its supporting base 20| around the axis of motor
shaft |6| having a hollow end journalled at |62
pivot 202 carried by upstanding ears 203 formed
on cover ‘204 of casing |64. A set screw 205
in rear standard 20 of framework F and its other
end journalled in end wall |63 of gear case |64
threaded into an upstanding boss 206 on cover
is provided. A pinion gear |65 meshing with
204 affords means 4for securing the desired coun
gear 25 is journalled on shaft |6| and carries an
terclockwise movement around the axis of mo
integral dog clutch member |66. Clutch mem- tor pivot 202 and retaining the desired adjust
ber |66 is designed to cooperate with a shiftable
ment.
clutch member |61 slidably but non-rotatably
To assure positive drive of wheel W in all of
its adjusted positions, the present embodiment
mounted on shaft |6|. Clutch member |61 is
shiftable from its inoperative position shown in
of this invention provides a separate motor M’
Figure 1 to its operative position in engagement 60 carried by housing H so as to be movable as a
unit with the housing. This is accomplished by
with member |66 by means of a shifter rod |68
providing cap sections |28 and |52 of collars |21
extending into the hollow end of shaft |6| and
and |5| with upwardly extending arms 201 de
provided at one end with a key |69 slidably
signed to receive a pivot rod 208 and oppositely
mounted for axial movement in way |1| of shaft
disposed outwardly and upwardly extending arms
ISI- and rigidly connected at its ends to clutch
position as gauging means L is moved toward
200 the outer ends of which are interconnected
by a strap 2 I0 secured to arms 209 by cap screws
2| I. Intermediate its ends strap 2|0 is provided
with an upwardly extending stop screw 2i 2
threaded into strap 2|0 and a boss 2|3 formed
on the under surface of strap 2|0. A reinforc
ing web ‘2|4 extends in opposite directions from
and from its gauging position. To this end, the
protruding end~ of shifter rod |685 is provided
~with a suitable yoke -|12 loosely- swivelled on'rod
boss 2| 3 toward the ends of strap 2|0.
A motor supporting base 2 I5 carrying motor M’
is pivoted on -rod 203 and extends across hous
member |61.
While shifter rod |68 may be actuated in any
suitable manner, the present invention contem
plates connecting shifter rod |68 to shaft 5| so
that operation of lever 1| automatically shifts
clutch member |61 to its operative or -inoperative
2,418,334
9..
lo
to receive cap screws 42 for securing clamp bar
ing H into abutting relation to stop screw 2l2
34 against work pieces K to secure the work pieces
(Figures 2 and 5). A belt pulley 2 | 6 having three
in the sockets formed between flanges 234 and
V-shaped grooves 2|1 is mounted on the shaft
' body section 231 substantially in the manner work
2|8 of motor M’. The V-belts 22| disposed in
pieces K are secured in the sockets formed by
grooves 2 I1 of pulley ZIB and similar grooves 222
side plates 34, member 31 and ñange 38. The
in pulley 93 connect motor M’ to spindle 88. The
tension of belts 22| is adjusted by manipulation
socket of this embodiment, however, embodies
automatic means, in the form cf steel balls 238
of stop screw 212 in well known manner.
and aligned spring pressed plungers 239, for align
From the preceding description, it will be clear
that motor M', spindle 88, pulleys 2|6 and 222 10 ing the work pieces in the sockets. As clearly
seen in Figure 12, balls 238 are secured in spheri
and housing H move as a unit upon axial or trans
verse adjustment of wheel W and that the driving
cal ended bores 24| in flanges 234 by cap screws
relationship between motor shaft 2|8 and spin
242 having spherical sockets in their enos and
plungers 23S` are slidably mounted in aligned
dle 88 is not disturbed by such adjustments.
Since operation of this embodiment of the in 15 bores 243 the outer ends of which are threaded
to receive cap screws 244 having a spring receiv
vention is believed clear from the preceding de
scription, a detailed description of operation at
ing recess in their inner ends. A coil spring 245
this point is not believed necessary.
housed in the interior of plungers 239 and in the
Upon reference to Fig. 3 of the drawings, it
recess in screw 244 urges plungers 239 toward
will be noted that the internal diameter of the 20 balls 238 the extent of movement being limited
annular grinding surface of the wheel W is great
by engagement of shoulders 246 and 241 formed
respectively on plungers 238 and flange 234. Cap
er than the length of the work piece K, and that
in the continuous traverse of the work piece
screw 4| in this form of the invention is threaded
diametrically of the wheel, the grinding action
into an arm 248 integrally formed on the body of
of said surface in one direction is fully com 25 hub 24 and extending outwardly from its front
face. While the angularity of chucks 33a cannot
pleted before the grinding action in the oppo
site direction- starts, with a maximum period of
be Varied in this form 0f the invention, selection
of suitably formed chucks 33a permits the an
contact between the grinding surface and the
gularity of the ground surfaces of Work pieces K
work. This is of particular importance in the
grinding of cutting tools, as it obviates possible 30 to be predetermined.
distortion of the cutting edge and assures uni
form wear of the grinding surface. With the
cutting edge of the tool moving across the grind
ing surface substantially radially thereof, all
parts or said surface contact the cutting edge
in each direction of movement of said surface
The gauging means L of this form of the in
vention diners from that previously described in
that arm 55a corresponding to arm 55 is carried
by a pivot 249 carried by transversely spaced arms
250 and 25| of bracket 53a. Arm 25| provides a
sleeve-like journal 252 designed to rotatably sup
port a rock shaft 51a. Rock shaft 5|a in this
relative to the tool. By properly synchronizing
and controlling the relative speeds of rotation of
form of the invention is a stub shaft having a
crank arm I83a, slightly longer than arm |83
the wheel and turret, a rapid and highly eiîìcient
grinding action may thus be obtained with the 40 previously described, at its far end as viewed in
Figure 11.
use of a grinding wheel of minimum diameter.
Lever 1| is non-rotatably secured to the nearer
The lateral adjustment of the grinding wheel
with respect to the turret is also an important
end of rock shaft 5|a and carries trip lever 16,
feature, as such adjustment enables the angle 4 trip shaft 15 and pawl 13 designed to cooperate
with a ratchet arm 11a, formed as an extension
of contact between the „work and the annular
of arm 25|, in the manner previously described.
grinding surface of the wheel to be varied in rela
tion to a vertical plane which includes the wheel
axis.
Turret .and work supports of Figures 8 to 12
Crank arm |8311 at its outer end carries a pivot
pin 253 the purpose of which will be hereinafter
50 pointed out.
At a point approximately intermediate its ends
Referring to Figures 8 to 12, this embodiment
arm |83a is pivotally connected at 253a to a rod
of the invention is substantially the same as that
previously described and the same reference nu
merals are employed to designate the same parts,
a detailed description thereof being omitted.
In this embodiment of the invention, frame
` 254 the upper end of which is slidably mounted
in a ball and socket connection 255 mounted in
a rigid arm 256 formed on lever 55a. Rod 254
is threaded throughout its length and is provided
with spaced sets of lock nuts 256 and 251, nuts
256 being disposed between pivotal connection
work F differs from that previously described only
253:1 and ball and socket connection 255 and serv
in the provision of a further supporting base 23|
on sleeve 22, spaced rearwardly from base 54 60 ing as an abutment for a coil spring 258 which
reacts against ball and socket connection 255 to
for a purpose to be hereinafter pointed out. Sleeve
resiliently urge lever 55a in a counterclockwise
22 rotatably supports hollow shaft 23 which in
direction around pivot 249 as lever 1| and rock
turn carries hub section 24 of turret T at its front
shaft 51a are rotated in a counterclockwise di
end and gear 25 at its rear end. While no bear
ings are shown in Figure 11 between sleeve 22 65 rection to bring arm 55a into its operative posi
tion. Nuts 251 are disposed on the end of rod
and shaft 23, it will be appreciated that suitable
254 in abutting relation to ball and socket con
bearings may be employed, if desired, without
nection 255 and serve to adjustably predetermine
departing from the present invention.
the relative angular position between arm 55 and
Hub 24 in this embodiment of the invention is
connected to the inner ends 21 of four outwardly 70 crank arm |83a to assure proper positioning of
gauging means L upon actuation of lever 1|.
extending arms 28 provided with integrally formed
Adjustment of work pieces K is accomplished
chucks 33a. As clearly seen in Figure 12, chucks
in substantially the same manner as previously
33a comprise upwardly extending side flanges
described, the only difference resulting from the
234 and a body section 231. The upper surfaces
of flanges 234 adjacent their outer ends are tapped 75 diiferences in details just described.
2,413,334
11
12
Grinding wheel and spindle construction lof Fig
ing gearing G of this embodiment comprises a
ures 8 to 12
pinion 294 mounted on a shaft 295 which also
carries pulley 292 and a gear 296 mounted on a
Grinding wheel W of this form of the invention
is mounted on a hub 93a in substantially the same
manner as previously described and a detailed
description will, therefore, be omitted.
Hub
shaft 291 which also slidably carries pinion 293.
Shaft 295 and one end of shaft 291 are journalled
in suitable anti-friction bearings (not shown)
mounted in a bracket 298 secured to base B
83a, however, is keyed to the end 81a of a
and the other end of shaft 291 is mounted in
spindle 88a which also constitutes the shaft
suitable anti-friction bearings (not shown)
of motor M serving to drive wheel W and turret ha 0 mounted in a bracket 299 secured to base B.
T.y To effect this end, motor M is carried by
Pinion 293 is operated by a shifter lever 30|
sleeves 26| and 262 which together constitute
disposed at the front of turret T on a hollow,
housing I-I of this form of the invention and slid
axially slidable, shifter tube 362 interposed be
ingly engages base B at 260 on opposite sides
tween shafts 23 and |46 and provided at its inner
to prevent rotation of the motor and sleeves 26| 5*' end with a shifter yoke 3D3 designed to cooperate
and 262.
in well known manner with a yoke groove 394
Referring'to Figure 9, spindle 88a is suitably
formed in the hub 305 of gear 293.
journalled in housing H by a pair of spaced anti
Automatic means for preventing connection
fri‘ction bearings (not shown) one of which is
of the turret drive during adjustment of the work
located adjacent hub 83a and the other of which 20 pieces in this form of the invention comprises
is located at the end 263 of motor M. Sleeve 26|
a block 366 having an upwardly extending arm
is slidably supported by a pillar 264 mounted on
361 pivotally connected at 398 to a rocker arm
base B and having a cap section 265 bolted ther 369 pivoted intermediate its ends to a bracket 3| |
to to hold sleeve 26| in sliding position on pil
mounted on base 23| of sleeve 22. The opposite
lar 264. Sleeve 262 at its right hand end, as 25 end of rocker arm 309 is pivotally connected at
viewed in Figure 9, is provided with a screw
3i2 to a link 3|3 carried by pivot pin 253 of crank
vthread 265 designed to cooperate with a nut thread
arm i33u. Operation of this lock-out means is
261 formed at the end of a sleeve 268 journalled
automatically effected upon actuation of lever 1|
in a socket formed by a pillar 269 mounted on
to bring gauging means L into operative position.
base B and a cap section 21| bolted to pillar
This automatic lock-out means also prevents
269. Axia1 movement of sleeve 268 with respect
an operator from moving gauging means L into
to pillar 239 and cap section 21| is prevented
operative position until shifter tube 362 has
by flange 212 integrally formed on sleeve 263 and
been actuated to shift pinion 293 to its disengaged
the hub of sprocket wheel 213 fixed to sleeve 268
position, since block 396 would be arrested in
and which is held in place by a nut 214 threaded
its movement by shifter yoke 363 and through
on the end of sleeve 268.
arm 361, rocker 369, link 3|3, clank arm |83a
The end 215 of spindle 63a is provided with a
and shaft 54a, would prevent further movement
relatively long keyway 216 and is telescopically
of lever 1|.
received in a hollow shaft section 211 which has
The invention may be embodied in other spe
an integral mating key 218 formed at its inner 40 ciñc forms without departing from the spirit or
end for sliding cooperation with keyway 216. At
essential characteristics thereof. The present
its other end shaft 211 is supported by an anti
embodiments are therefore to be considered in all
friction bearing (not shown) housed in extension
respects as illustrative and not restrictive, the
219 Yof' a housing 28| threaded on the end of
scope of the invention being indicated by the
sleeve 263. Adjacent extension 219 shaft 211 45 appended claims rather than by the foregoing
is provided with a pulley wheel 282 which is
description, and all changes which come within
keyed to shaft 211 at 293 and held against axial
the meaning and range of equivalency of the
displacement by nut 234.
claims are therefore intended to be embraced
From the foregoing description, it will be clear
therein.
that motor M, sleeves 26| and 292, end 215 of 50 What is claimed and desired to be secured
spindle 88a and wheel W are caused to move ax
by United States Letters Patent is:
ially as a unit with respect to base B, pillar 264,
1. A grinding machine comprising a rotatable
sleeve 268 and shaft section 211 upon rotation
turret having a series of relatively fixed chucks
of sleeve 268 but that the rotational driving con
for supporting a plurality of work pieces, each
nection between spindle 83a and shaft section 211
55 chuck having means for adjusting a work piece
is not affected. This axial movement is for the
to position the surface to be ground along the
same purpose as that previously described and
may be effected from the front of the machine
aXis of the turret, micrometer means common to
the series of chucks mounted for movement from
by rotation of hand wheel |41 and shaft |46a,
an operative position to an inoperative position
which in this form of the invention is slightly
longer than its counterpart of Figures 1 to 7, is 60 adjacent an individual chuck, means for position
ing said micrometer means for gauging the posi
provided with a sprocket wheel 285 rather than
tion of thework pieces and locating said surfaces
bevel gear |25 and is held against axial move
ment in any suitable manner. A sprocket chain
in a common plane for grinding, means for rotat
ing said turret, control means for said turret
286 (Figures 8 and l0) interconnects sprocket
wheels 213 and 236 to effect rotation of sleeve 65 rotating means operatively connected with and
actuated by said micrometer positioning means,
268 and the desired axial adjustment of wheel
and a grinding wheel having its grinding surface
W.
disposed adjacent to the path of movement of
Turret and wheel drives of Figures 8 to 12
the work pieces for grinding said surfaces thereof.
Turret T in this embodiment of the invention 70 2. In a grinding machine having a revolving
is driven by motor M through end 215 of spindle
turret for supporting work pieces to be ground
88a, shaft section 211, pulley wheel 282, a belt
and a revolving grinding wheel, means for driv
29|, a speed reducing pulley 292, speed reducing
ing said turret and said grinding wheel; means
gearing G and a shiftable gear 293 adapted to be
movable into the path of said ¿work pieces for
selectively engaged with gear
Speed reduc 75 gauging the position of said work pieces `and as
,
2,413,334
14
13
9. A grinding machine comprising a supporting
frame-work; a hollow, revolving work supporting
a shiftable drive element for starting and stop
turret rotatably mounted on said frame-work;
ping said turret; and means for automatically
work holding chucks carried by said turret for
locking said drive element against shifting, to
prevent starting of said turret until said gauging Ul gripping and positioning work pieces to be
ground; a sleeve-like housing disposed in spaced
means is moved out of the path of said work
parallel relation to the axis of said turret and
pieces.
suring positioning thereof in a common plane; '
3. In a grinding machine having a revolving
grinding wheel and a revolving work supporting
supported on said frame-work for axial move
ment toward or away from said chucks; a grind- \
ing wheel carriedby said housing and having a
grinding wheel face; a motor carried by said
housing; means for moving said housing, said
grinding wheel and said motor axially along said
frame-work to bring said grinding wheel face into
ter support in predetermined position; and a mi
crometer gauge supported by said support for 15 position to grind work pieces in said chucks;
means drivingly connecting said motor to said
gauging the position of said work.
grinding wheel; and means connecting said motor
4. A grinding machine, comprising a support
to said turret to drive said turret in all axially
ing framework; a hollow shaft supported for ro
shifted positions of said housing, said grinding
tation in said frame-work; a revolving work sup
porting turret carried by said shaft; adjustable 20 wheel, and said motor.
10. The combination deiined in claim 9, where
work holding chucks carried by said turret for
in said last-named means comprises a hollow
gripping and positioning work pieces in a com
shaft section slidably but non-rotatably con
mon plane; a sleeve-like housing disposed in
nected to said motor shaft; a drive pulley carried
spaced parallel relationship to said hollow shaft
by said hollow shaft section; a driven pulley
and supported on said frame-work for axial
mounted to drive said turret; and a pulley belt
movement toward and away from said common
interconnecting said drive pulley and saiddriven
plane; a second shaft rotatably mounted in said
pulley.
housing; a grinding wheel carried by said second
11. The combination defined in claim 9, where
shaft and having a radial grinding face; a motor
in said means for moving said housing, said
connected to said second shaft for driving said
grinding wheel and said motor comprises a sleeve
grinding wheel; and means passing through said
hollow shaft and operably connected to said
iournalled on said frame-work and threadedly
sleeve-like housing for axially sliding said hous
associated with said housing; a sprocket Wheel
ing, said second shaft, said grinding wheel and
non-rotatably mounted on said sleeve; a shaft
said motor, to bring said grinding wheel face into
coaxially arranged with respect to said turret and
said common plane for grinding said work.
extending outwardly in front of said turret; a
5. The combination deñned in claim 4, together
hand wheel for rotating said shaft; a second
with means, connected to said motor, for driving
sprocket wheel carried by said shaft; and a
said hollow shaft and said turret in all axially
sprocket chain interconnecting said sprocket
turret, a micrometer support mounted for move
ment toward and away from said work support
ing turret; an abutment on said support adapted
to contact said turret for stopping said microme
shifted positions of said motor.
'
6. The combination deiined in claim 4, together
wheels.
’
`
12. In combination with a grinding stone, a
with means, including a shiftable control ele
movable work holder and operating means there
ment, connected to said motor, for driving -said
for, gauge means having a part to contact the
hollow shaft and said turret in all axially shifted
work to determine its position relative to a grind
positions of said motor, and means is provided
ing
face of the stone, a movable support for said
for shifting said control element to selectively
gauge means, means for moving said support to
connect and disconnect the drive from said motor
dispose said gauge means in operative or inoper
to said turret.
ative position, and means connected with and re
7. The combination defined in claim 4, wherein
said motor, said sleeve-like housing and said sec 50 sponsive to actuation of said last named means
to move the gauge means to its operative position,
ond shaft are mounted on an auxiliary supporting
to render said operating means for the work
base mounted for sliding movement normal to the
_axis of said turret, whereby the axis of said grind
ing wheel may be selectively positioned various
-distances from said turret, for varying the path
.of movement of said work across the face of the
wheel.
8. A grinding machine comprising a hollow
shaft; a revolving work supporting turret mount
Ied on said shaft; means, including a driving
member shiftable into and out of driving engage
holder inoperative.
'
.
13. The combination defined in claim 12, to
gether with means coacting with a part of said
last named means in the operative condition of
said work holder operating means, to lock said
support and gauge means in inoperative position
with respect to the work holder.
14. In combination with a movable work holder
for a grinding machine, gauge means, means for
ment, for driving said shaft and said turret; work
adjusting said gauge means to and from opera
supporting chucks mounted on said turret and
tive position with relation to the work, and means
operable to hold work in a predetermined plane
for grinding; a grinding wheel shaft mounted in 6:wi rendered effective by the relative movement be
tween the gauge means and work holder to co
spaced parallel relationship to said hollow shaft;
operative position, to lock the work holder against
a grinding wheel mounted on said shaft; means
movement relative to the gauge means.
mounting said grinding wheel shaft for axial
15. The combination defined in claim 14, in
movement to advance said grinding wheel into
>said grinding plane; and means, extending 70 which said last named means comprises a mem
ber ñxed to a part of said adjusting means and
through said hollow shaft and terminating in an
movable therewith into and out of coacting en
operating station adjacent the front of the tur
gagement with the work holder.
ret, for engaging and disengaging said driving
member and for advancing said grinding wheel
OLIVER T. PIEPER.
into said grinding plane.
75
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