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Патент USA US2407837

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Sept. 17, 19446.‘
A_ w, KEEMA
2,407,835
ATTACHMENT FOR GR‘INDING MACHINES
Filed April '4, 1944
2 Sheets-Sheet 1
INVENTOR
B,
, a1 éurp?méw
'
v
ATTORNEYS
Sept. 17, 1946.
‘A. w. KEEMA
2,407,835
ATTACHMENT FOR GRINDING MACHINES
Filed April 4, 1944
2 Sheets-Sheet 2
MI"
I
"
INVENTOR
'
?fexawa/er W/l’ee/Wa
B
’
ATTORNEYS
Patented Sept. 17, 1946
2,407,835
'UNITED STATES PATENT OFFICE
2,407,835
ATTACHMENT FOR GRINDING MACHINES
Alexander W. Keema, Providence, R. I., Vassignor,
by mesne assignments, to Bay Products Cor
poration, a corporation of: Massachusetts
ApplicationApril 4, 1944, Serial No. 529,493
1
10 Claims.
(Cl. 5‘1,—1.66)
2
This invention relates to an attachment for
tion inwardly from the adapter and inwardly
a. grinding machine, more particularly a surface
from the end of the spindle. ‘ Thus, everything
grinder.
Attachments for grinding machines usually
position the grinding tool in a plane some dis
tance removed ‘from the plane of the grinding
wheel which is driven direct from the spindle
when the attachment is not in use. Conse
quently, the full width of the table upon which‘
the work is mounted is not available for use with 10
the attachment.
, One of the objects of this attachment is to
provide an attachment mounting which will en
able the tool of the attachment to be placed
is built inwardly from the end of the spindle in_~
stead of outwardly from the end of the spindle
whereby the driving belt may be positioned in a
plane to utilize a greater amount of table area
than has heretofore been provided with attach-_
ment for grinding machinery of the character
here dealt with.
With reference to the drawings, I0 designates
the spindle of a grinding machine which pro
jects through a sleeve housing ll whichis a
part of the casing or framework of the machine.
A conical portion 12 projects beyond the cylin
nearer to the plane of the grinding tool which is 15 dri-cal end l3 of the‘ spindle and has a mounting
utilized on the grindingmachine proper or in the
member l4 positioned thereon by means of the
plane where a greater amount of area of the table
nut l5. This mounting member is utilized for
may be utilized for the work.
the positioning of a grinding wheel on the spin- ‘
Another object of this invention is the provi
dle when desired.
‘
»
a
sion of an adapter whereby the supporting brack 20 The attachment parts which are provided con~
et for the attachment may be arranged to em
sist of an adapter member designated generally
brace the spindle housing and be positioned in
It, a bracket designated generally ll, a tool shaft
wardly from the end of the spindle.
housing unit designated generally l8, and a ];>u1.—v
Another object of this invention is to arrange
ley designated generally 19, all of which are
a driving ‘pulley to be located in substantially the 25 shown in exploded relation in Fig. 3.
same plane as that occupied by the main grind
The adapter designated generally it. is gener
ing wheel which would be mounted upon the
ally annular in shape, having a, body portion 2a
spindle of the grinding machine.
with acentral opening 2| therein of substantially
With these and other objects in view, the in
the diameter of the spindle [3. This body por
vention consists of certain novel features of con
tion is secured by means of screws ‘or bolts 23
struction, as will be more fully described and
to the spindle housing I I which is provided with
particularly pointed out in the appended claims.
threaded openings 24 to receive three or more
In the accompanying drawings:
screws23 passing through the body and entering
' Fig. l is a side elevation of a fragmental por
this spindle housing. This adapter has a rear.
tion of the spindle and housing illustrating my ; Wardly extending ?ange 24 projecting over the
attachment in place thereon;
housing II with a wide face 25 and outwardly
Fig. 2 is an end view of the same;
Fig. 3 is an exploded view showing the various
parts, some of which are in section, of the spin
dle, housing and the attachment which is posi
tioned thereon;
‘Fig. 4 is a sectional view of the attachment,
spindle and housing such as shown in Fig. 1; and
Fig. 5 is a sectional view taken on substantially
line 5——5 of Fig. 4.
In proceeding with this invention the various
parts of the attachment have been reformed and
reassembled so that the driving pulley which is
extending lugs or ears 2.6 which are threaded as
at 21 for the mounting of the bracket ll thereon.
The bracket ll’ has a generally annular body
H portion 39 stiffened by a rib 3| extending radially
outwardly therefrom with a central opening 32.
which is of a size to permit this bracket to. be
loosely positioned over the housing H so as to
encircle or embrace the same. This bracket is
positioned about the spindle housing prior to the
bolting of the adapter E6 in position. After the
adapter is in position as above described the
bracket is secured to the adapter by means of
bolts 33 which extend throughthe lugs or out—_
utilized is mounted‘ directly on the end of the
spindle with its driving surface arranged ‘so as to Si) wardly extending cars 34 on either side of the
be inwardly from the end of the spindle upon
bracket which are so located as to register with
which it is mounted. To accomplish this an
the lugs or ears 2% of the adapter. The lugs ‘or
adapter is provided which is mounted on the
cars 34 of the bracket are slotted as at 35 so as.
spindle housing and arranged with a supporting
bracket for the attachment tool shaft at a posi
to accommodate the supporting bracket in vari-v
cus positions with reference to the adapter, the
i‘
2,407,835
3
from the outer extremity of the spindle, a tool
bracket being bound in place by the bolt 33 in
a desired position of adjustment. At the lower
portion of the bracket l1 a, mounting foot 36 is
provided having threaded openings therein 31 to
Whichthe casing 38 of the unit I 8 is attached
by means of bolts 39 extending through the ears
shaft rotatably carried by said bracket, a pulley
carried by said tool shaft and positioned at a
location substantially inwardly of the outer ex
tremity of the spindle, a pulley secured to said
spindle cupped to extend over said adapter mem
ber and. a belt embracing said pulleys whereby
40 which are on either side of this unit I8. In
this unit l8 there is located a shaft designated
said spindle drives said tool shaft.
4. In combination with a grinding machine
4| upon the end of which a tool 42 is mounted
for operation on the work. A pulley or belt en 10 spindle and housing therefor, a grinding attach
gaging surface 43 is provided on this shaft so
ment wholly supported by said spindle and hous
that the same may be driven.
ing comprising an adapter member secured to
The pulley 43 is driven by the pulley H! which
the spindle housing, a bracket secured to said
consists of a body portion 45 having an opening
adapter to embrace the spindle housing inwardly
46 therein to receive the member M and be held 15 from the outer extremity of the spindle, said
securely on the member l4 by means of the nut
member and bracket having portions concentric
4‘! engaging the threaded portion 48 of this ' with said spindle, a tool shaft rotatably carried
member thereby holding the s'amefirmly on the
by said ‘bracket, a pulley carried by said tool
spindle so as to be driven thereby. The body 45
shaft and positioned at a location substantially
is arched inwardly so as to provide the pulley
inwardly of the outer extremity of thespindle,
cup shaped. The edge portion of the ‘pulley is
a pulley secured to said spindle having’ abelt
, provided with spaced ?anges 49 and 50 providing
engaging surface in line with said pulley on said
a belt driving surface 5| directly over and in
tool shaft and a belt embracing said ‘pulleys.
the same plane with the pulley 43 so that a belt
5. In combination with a grinding machine
.52 may embrace the pulley 45 and the pulley 43 25 spindle and housing therefor, an auxiliarygrinde
to drive the shaft 4| of the attachment from the
ing attachment wholly suspended from said house
spindle |3.
,
ing comprising an adapter member secured to the
'7 By the arrangement which is here provided se
outer edge of said housing and having a portion
curing the bracket inwardly a substantial dis
thereof positioned at a location substantially in
tance beyond the end of the spindle and housing, 30 wardly of the outer extremity of saidhousing,
and using such bracket with its built in portions
a bracket‘ secured to the said portion ‘of the
and foot extending inwardly, unit |8 which car
adapter extending inwardly of the housing,‘a-tool
ries the shaft for the tool is mounted much fur
shaft rotatably carried by said bracket, a pulley
V ther inwardly from the end of the spindle than
on said ‘shaft and positioned in a plane passing
has heretofore been possible. Also by providing
laterally through said adapter substantially in
a pulley which is of generally cup shape so that
wardly of the outer edge thereof, a pulley on said
its driving surface will be substantially over the
spindle, and a belt embracing said pulleys where
adapter the plane of‘ the drive of the belt is
by said spindle drives said tool shaft.
V
located a substantial distance inwardly from the
6. In an attachment for a grinding machine
end of the spindle. Further, by making the shaft 40 an adapter member to be secured to the spindle
4| short where it extends outward beyond the
housing at the outer edge thereof and cupped to
casing l8 and driving this shaft close to the
extend over said housing, a bracket secured to
grinding tool a greater portion of the table upon
said adapter to embrace the spindle housing in
which the work is usually mounted maybe uti
wardly from the outer extremity of the spindle, a
lized than has heretofore been possible.
45 tool shaft rotatably carried by said bracket, a
I claim:
1. In an attachment for a grinding machine
an adapter member to be secured to the spindle
housing, a bracket secured to said adapter to em
pulley carried by said tool shaft and positioned
brace the spindle housing inwardly from the outer
extremity of the spindle, said member and bracket
having the same center, a tool shaft rotatably
carried by said bracket, a pulley carried by
spindle and housing therefor, an adapter member
secured to the spindle housing at the outer edge
thereof and cupped to extend over saidhousing,
at a location substantially inwardly of ‘the outer
edge of said adapter member.
‘
>
7. In combination with a grinding machine
a bracket secured to said adapter at the inner
edge thereof so as to embrace the spindle housing
said tool shaft and positioned at a location sub
stantially inwardly of the outer edge of said 55 inwardly from the outer extremity of the spindle,
adapter member.
a tool shaft rotatably carried by said bracket, a
2. In combination with a grinding machine
pulley carried by said tool shaft and positioned
spindle and housing therefor, an adapter member
at a location substantially inwardly of the outer
secured to the spindle housing, a bracket secured
edge of said adapter member, a pulley secured
to said adapter to embrace the spindle housing 60 to said spindle at the outer end extremity there,
inwardly from the outer extremity of the spindle,
of, and a belt embracing said pulleys whereby
said member and bracket having portions con
centric with said spindle, a tool shaft rotatably
said spindle drives said tool shaft.
carried by said bracket, a pulley carried by said '
tool shaft and positioned at a location substan~
tially inwardly of the outer edge of said adapter
member, a pulley secured to said spindle, and a
belt embracing said pulleys whereby said spindle
drives said tool shaft.
.
3. In combination with a grinding machin
-
y
8. In combination witha machine spindle and
housing therefor, a grinding attachment wholly
supported by said spindle and housing compris
ing an adapter member securedto the spindle
housing, a bracket secured tosaid adapter to
embrace the spindle housing inwardly from the
outer extremity of the spindle, a tool shaft ro70 tatably carried by said bracket, a pulley carried,
by said tool shaft and positioned at a location
spindle and housing therefor, a grinding attach
ment wholly supported by said spindle and hous
ing ‘comprising an adapter member secured to
the spindle housing, a bracket secured to said
adapter to embrace the spindle housing inwardly 75
substantially inwardly of the outer extremity of‘
the spindle, a pulley secured to said spindle at
the outer end extreme portion thereof and cupped
to extend over said adapter'member and a belt
2,407,835
embracing said pulleys whereby said spindle
drives said tool shaft.
9. In combination with‘ a grinding machine
spindle and housing therefor, a grinding attach
ment Wholly supported by said spindle and hous- _
ing comprising an adapter member secured to
the spindle housing, a bracket secured to said
6
the extreme- end portion thereof formed to re
ceive an abrasive Wheel thereon, an auxiliary
grinding attachment wholly suspended from said
housing comprising an adapter member secured
to the outer edge of said housing and having a
portion thereof positioned at a location substan
tially inwardly of the outer extremity of said
adapter to embrace the spindle housing‘inwardly
housing, a bracket secured to the said portion of
from the outer extremity of the spindle, a tool
the adapter extending inwardly of the housing,
shaft rotatably carried by said bracket, a pulley 10 a tool shaft rotatably carried_by said bracket, a
carried by said tool shaft and positioned at a lo
pulley on said shaft and positioned in a plane
cation substantially inwardly of the outer ex
passing laterally through said adapter substan
tremity of the spindle, a pulley secured to said
tially inwardly of the outer edge thereof, a pul
spindle at the outer end extremity thereof and
ley on said spindle secured to the said extreme
having a belt engaging surface in the line with
end portion thereof, and a belt embracing said
said pulley on said tool shaft and a belt embrac
pulleys whereby said spindle drives said tool
ing said pulleys.
shaft.
10. In combination with a grinding machine
spindle and housing therefor, said spindle having
ALEXANDER W. KEEMA.
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