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2,409,415
Patented Oct. 15, “1946
» UNITED STATES
`
PATENT #OFFICE
2,409,415
l
»
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UNIVERSAL BENCH GRINDER
Anders Bernhard Blomquist,` Cranston,` R. I.
Appiieaticn June 20, 1945, serial No; 600,521`
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6 Claims.
ly
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2
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Fig. 5 is a sectional view taken substantially
'IIhis invention relates toa machine toolß, par
ticularly a machinewhich utilizes abrasive means
for _removing excessive material from a work
pîlece.
(o1. 51---e4>
.
alongi line 5.»5 of Fig, 1;
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»
Eig. 6 is a sectional view taken substantially
` along line 6_6 of Fig. 1*; and
f
In making dies, gauges and like tools, it is
often necessary after subjecting the tool to a
liligL 7 is al sectional view taken substantially
along line T-T of F_ig„3_.
hardening process to. manually remove, such as
In proceeding with this invention I rotatably"
by honing or hand grinding, surplus material
mount a cutting tool which may be a ,grinding`
wheel»` of a size Vand form appropriate to the na
10 ture or, the work to be operated- upon. The wheel
is- providedl with a reciprocal motion- . and is
It is an object of this invention to provide a
from, the tool at locations thereon not accessible
to machine tools now in use.
.
machine toolv which will be adaptable for'more
mounted in such` a manner` as to approach the»
complete use in the removal of material from
work either from- above or below orV at such an
angle as may be found- desirable.
dies, gauges and like tools after subjecting the
Referring to the drawings for a more detailed.
15.
same toa hardening process.
description of the invention Iû» designates a base
Another object of the invention is the provision
f‘rom which there extends an upright or column ‘
of a machine toolof the above character in which
il `at the~ upper end of which there is fìxeda
the cutting tool will be provided with a recipro
bracket I2. The bracket I2 has a bearing in
cal motion.
Another object of the invention is the provision 20 the form of a trunnion I3, the axis` of which
extends substantially horizontaler at right angles
of a machine tool of the above character in which
to the column II_ Rotatably mounted on the
a rotating cutting» tool will be additionally pro
bracket I2~is a grinding head whichcomprises
vidcd‘with a reciprocating motion.
asupport I4; provided with- an opening I5 which
Another object or the invention is the provi->
sion of a machine tool of the above character in 25 -lis` split andin which is receivedl the trunnion> I3.,
The lwalls of this opening terminate in spaced.
which the cutting tool may be positioned to oper
ears provided with aligned openings I6“ and I'I
ate upwardly or downwardly upon the work.,
(see- Fig.` 5). The opening I1 is threaded and
Another object of the invention is the provision
receives a screw bolt IBV which extends through
of» av machine tool of the above character in
which the cutting tool support may be rotated 30 opening'rIIS- to adjustably secure the support on
through 360°,
v the bracket I=2.
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Another object of the invention is the provi
sion of a machine tool of the above character in
which the tool may be rotated and reciprocated
by sources of power which are independent from
each other,
Another object of the invention is Ythe pro
vision of a machine of the above character in
which a work support may be angularly posi
tioned with respect to the cutting tool.
Y
With these and other objects in view, the in
vention consists of certain novel features of con
struction, as will be more fully described and
VFrom the support `Ui thereextends in spaced
substantial parallel relation arms I9, 2U, each `of
which is provided at the outer end with a clamp
portion12| in which there is provided an open
ing the, wall4 of` which extend into spaced ears.
and are pierced to receive clamp screws 22. A
bearing sleeveV 2.3 is mounted within the openings
ofl the- clamps andl provides a bearing in` which a
40 motor 24; is slidably mounted. This motor is
provided with an outer sleeve 25 to which there
are» securedv spaced shoes 26, 2l', These shoes ex
tend through an» elongated opening 28 provided,
inthe outer sleeve 23 and provide a bearing.- open
particularly pointed out in the appended claims.
45~»Í,ing«which receives the end portion of a lever 29
In theaccompanying drawings:
Fig. 1 is a side elevation partly in section of a
machine embodying my invention;
outer sleeve 23._
Fig. 2 is a front elevational view of the ma
chine;
Y
which is rockable to reciprocaterthe motor in the>
y
`Lever 29» is Íulcrumed ori» hanger Eil, one end of
which terminates > into a reduced> threaded portion
,
Fig. 3 is a side elevational view of the machine
3l1 located in elongated slot 32 providedv inthe
with the cutting tool and supporting structure
arm I9; ` A nut :i3` engages the threaded portion
positioned at a location opposite to that shown,
3i and secures the hanger `il); in adjustable posi-I
inIFigl;
tion along the slot 32, The hanger 3f!` is 4also'
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A
‘
Fig; 4- isa view partly in section taken substan
tially, along line 4-,-4.of-,Fig, 3,;_
provided With an elongated slot 3l!` and receives;
55 atpivot stud„_35 which . is, adlustablii` scoured along.;
2,409,415
3
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the slot 34. The lever 29 is bifurcated at its end
an abutment against which the collar 11 rests.
A central opening 80 is provided in the table to
receive the abrasive wheel 8l enabling it to move
beyond the surface of the table when the wheel
reciprocates. The wheel 8l is secured to the
spindle of motor 24 by means of a chuck 82 and
may be of a size and shape which is appropriate
for the nature and character of the work to be
portion 36 providing arms 31, 38 and also has an
elongated slot 39 which receives the stud 35 to
pivotally mount the lever on the hanger 30. The
arrangement provides for changing the position
of the lever in a horizontal and in a vertical
direction.
A cam 40 is positioned between the arms 31,
38 and engages the same to rock the lever about
handled.
In the operation of the machine the motors
are set in motion, the motor 24 rotating the abra
sive wheel 8I and the motor 41 reciprocating the
abrasive wheel 8| in a manner above described.
The work rests upon the surface of the table 62
the stud 35 and thus reciprocate the motor 24
in the sleeve 23.
This cam is fixed on one end
of a shaft 4| which is journaled in the support
I4. The other end of the shaft carries a pul
ley 42. A second shaft 43 is also journaled in
the support I4 and carries a pulley 44 at one end
thereof and a pulley 45 at the other end. Pul
ley 44 is aligned with pulley 42 and a belt 46
which has been adjusted to the desired position.
The work is then manually moved to the abra
sive wheel and' manipulated in an appropriate
operatively connects the pulleys.
manner so as to remove such material as is
In order to provide motion for the cam 40 a
motor 41 is mounted at the upper end of the
column I I by means of abutments 48 on the motor
at a position to engage the surface of an L-shaped
bracket 49. The motor is secured to this bracket
by means of screw bolts 50. A speed reducing
mechanism 5I is attached to the motor 41. From
this mechanism 5I, there depends a worm shaft
desired from the work. When it is desired to
change the location of the grinding head from a
position above the table 62, as shown in Fig. 1,
to a position beneath the table, as shown in Fig. 3,
the bolts 54 are loosened and the table swiv
eled about the column Il to a position which is
out of the path of travel of the grinding head,
the collar 11 moving with the bracket 63 because
52 which is journaled in bearings 53, 54 (see Fig.
of its connections and the support I4 is free to
7,) secured to the upper and lower plates 55, 56
be moved about trunnnion I3. The table 62 is
which are fixed to the column in any appropriate
next raised to clear the abrasive wheel 8|, then
manner such as by frictional engagement with
swung about the column to align opening 80 with
the inner walls of the column Il. This worm
the axis of the tool 8| and permit passing of the
shaft 52 engages a worm gear 51 fixed on a shaft
table thereover. To place the grinding head in
58. The shaft 58 extends substantially concen
the position shown in Fig. 1 it is merely necessary
tric with the axis of the trunnion I 3 and is jour
to reverse the operation above described.
naled in bearing bushings 59 and 66. 'A collar 35 It will now be apparent that I have provided
6I surrounds the shaft and engages the end of
a machine in which the abrasive tool supporting
bushing 59. The worm gear 51 abuts against
head may be swung through 360° to position the
the end of bushing 60 thus preventing axial move
same at a location which is appropriate to the
ment of the shaft in its bearings. The shaft 58
character of operation to be accomplished. It
extends beyond the support i4 and mounts a pul 40 will also be apparent that the motor 24 may re
ley 6I which is aligned with pulley 45. An end
main idle and the abrasive wheel 8l exchanged
less belt 62 operatively connects these pulleys
for such abrasive member which is operated by
45 and IBI. Thus, motion is transmitted from
the reciprocation thereof. The speed of recipro
the motor 41 to the cam 4B through the speed
cation may be chosen by the exchange of driving
reducing mechanism 5I, worm 52, worm gear 51, 45 pulleys.
shaft 58, pulleys 6I, 45, shaft 43, pulleys 44, 42
and shaft 4I.
I claim:
l. A machine tool having a grinding head
mounted for movement through an arc greater
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A work supporting table 62 is swivelly mounted
on the column I I by means of a bracket 63 which
than 180°, a motor slidably mounted in Said head,
is adjustably slidable and secured in position on 50 means for attaching an abrasive wheel to the
the column by bolts 64. The bracket is provided
spindle of said motor, e, rockably mounted lever
with an arm 65 positioned at one side of the cen
engaging said motor, and a cam engaging said
ter of the table and has an upwardly extending
lever for reciprocating said motor.
portion 56 which is received between ears 61, 68
2. A machine tool having a base, a bearing car
depending from the table 62 from an edge por 55 ried by said base and extending in a horizontal
The table 62 is pivotally mounted
direction, a grinding head rotatably mounted by
with relation to the portion 66 by means of a
saidbearing for rotation in a vertical plane, an
_ tion thereof.
pivot pin §69 extending through portion 66 and
through the ears 61, 68. The ear 61 is provided
abrasive wheel carried by said head, and means
for reciprocating said wheel including a pulley
60 mounted for rotation about the axis of said
with an arcuate slot 10 through which there ex
tends a lock bolt 1| threadedly engaging opening ~
bearing.
12 in the portion 66. The lower portion of the
ear 61 may be provided with graduations 13 and
3. A machine tool having _a work support, a
grinding head mounted for rotative movement
the portion 66 with a datum line 13' so as to in
about a horizontal axis relative to said support
dicate the position of the surface of the table rel 65 through an arc greater than 180° and movable
ative to the vertical.
to position said grinding head from a location
The table may be raised or lowered by means
above said support to a position beneath said
of a threaded member 14 provided with an en
larged head 15 and fixed against longitudinal
movement along the arm 65 in a manner to per
mit rotation thereof as at 16. A collar 'I1 is
swivelly mounted on the column II and has a
support.
4. A machine tool having a base, an upright
70 extending from said base, a trunnion carried by
said upright at substantially right angles thereto,
a grinding head rotatably mounted on said trun
threaded opening 'I8 through which extends the
nion for movement through an arc greater than
threaded member 14. A clamp collar 19 is ad
180°, a motor slidably mounted insaid head,
justably mounted on the column II and provides 75 means for attaching an abrasive wheel to the
2,409,415
6
spindle of said motor, a work support movable
mounted on said upright at a location to be posi
tioned beneath said trunnion, said grinding head
being movable to be positioned from a location
above said support lto a position atv a location
beneath said support, said support having an
opening through which said abrasive Wheel may
extend when positioned beneath said support.
5. .A machine tool having a base, an upright
extending from said base, a trunnion carried by
said upright at substantially right angles thereto,
above or beneath said support, said support hav
ing an opening through which said abrasive wheel
may extend when positioned beneath said support.
6. A machine tool having a base, an upright
extending from said base, a trunnion carried by
Said upright at substantially right angles thereto,
a grinding head rotatably mounted on said trun
nion for movement through an arc greater than
180°, a motor slidably mounted in said head,
means for attaching an abrasive Wheel to the
spindle of said motor, a work support movably
mounted on said upright at a location to be posi
a, grinding head rotatably mounted on said trun
-nion for movement through an arc greater than
tioned beneath said trunnion, said grinding head
180°, a motor slidably mounted inI said head,
being movable to be'positioned from a location
means for attaching an abrasive Wheel to the 15 above said support to a position at a location
spindle of said motor, a Work support mov-ably i beneath said support, said support having an
opening through which said abrasive Wheel may
mounted on said upright at a location to be posi
extend when positioned beneath said support, a
tioned beneath said trunnion and extending in
lever rockably mounted in said grinding head and
the path of movement of said grinding head, said
grinding head being movable to be» positioned 20 engaging said motor, a carn carried by said head
` and engaging said lever for rocking the same for
from a location above said support to a position
at a location beneath said support, said support
reciprocating said motor.
being movable out of the path of movement oi
said grinding head when moved from a location
ANDERS BERNHARD BLOMQUIST.
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