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Feb., 14, i950’
A. R. HITE
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2,497’WÜ
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Filed oct. 3o, 1945
2 sheets-Sheet 2
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'2,497,170
UNITED STATES
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2,497,170
TOOL
Alonzo It. Hite, Mattoon, Ill.'Y
»Application Gctober 30, 1945', Serial No. .625,473t
1 Slaim. (Cl. 9`0---11)
vil
My invention relates to tools and particularly
to a milling attachment adapted to' be connected
with lathes and the like.
The main object of the invention is to make
it possible to execute small milling operations in
small shops not being equipped with a conven
tional milling machine.
Another object of the invention is to provide
a milling device adapted to be easily attachable
to and removable from a lathe or the like.
A further object of the operation is to provide
a milling device adapted to be used in connection
I8 is fast on the shaft I6.
A hollow shaft I9
extends vertically through the top of the body
lâ and the bottom plate II thereof and is ro
tatable therein. A worm wheel 20 is rigidly
mounted on this hollow shaft and meshes with
the worm I8. The stern 2| of a milling cutter 22
may be inserted into the hollow shaft i9 and is
rigidly held therein by a set screw 23. A rec
tangular spacer bar 24 extends cross-wise over
10 the whole width of the body adjacent its end
which is also parallel to the center line of the
iathe. A supporting plate 26 is fastened on top
of the spacer bar 24 by means of bolts 21, which
extend through the plate and the bar and are
moving it from the lathe.
15 screwed into the body Ill to hold the bar 2li and
Other objects of the invention may appear in
the plate 26 in place. A slot 28 is provided in the
the following specification describing my inven
plate 26, extends lengthwise thereof and is lo
tion with reference to the accompanying draw
cated symmetrically on the longitudinal center
ings forming a part thereof. It is however to be
line of the milling device. A bolt 29 is slidably
noted that my invention is not to be limited or 20 inserted in said slot and carries on its lower por
restricted to the exact construction and combina
tion underneath the supporting bar 26 a clamp
tion described in the following specification and
ing plate 30. This clamping plate is adapted to
shown in the drawings, but that such changes
slide into the T-slot 3l of the tool carrier 32 of
and modiñcations can be made, which fall within
the lathe. The bottom plate II is extended be
the scope of the claim appended hereto.
25 yond the above mentioned body wall lli and ex
In the drawings:
tends transversely of the lathe, as shown in Fig
Figure l is a top View of the milling attachment
ures 3 and 4. On this extension of plate II a
according to my invention showing a shaft to be
motor 33 is mounted which drives the pulley I‘l
worked on in position, but omitting the motor
by means of a belt 34. In this manner the
driving the milling cutter.
30 milling cutter 22 is also driven.
Figure 2 is a sectional View substantially taken
To adjust and hold a shaft 35 in position for
on line 2-2 of Figure 1, a portion of the front
cutting a key-way therein, said shaft is ñrst lined
wall of the body of the milling attachment being
up by using a self-centering chuck 36 in the head
broken away.
stock and the center of the tail-stock. Then sup
Figure 3 is a diagrammatical side View of a 35 port the shaft in a steady rest 31 of conventional
lathe showing the milling attachment including
construction and back the shaft off from the
motor in working position, and
chuck 3B. In order to prevent the shaft from
Figure 4 is a diagrammatical top View of the
vibrating while the key-way is being cut, an ad
lathe bed, showing the milling attachment in
justable steady block 38 of conventional con
working position and illustrating the manner in 40 struction is fastened to the body lil and adjusted
which the shaft is supported, into which a key
so that the face plate 39 will support the shaft
way is to be cut.
35 against the pressure exerted by the cutter 22.
Referring to the drawings, the milling attach
From the above description it will be under
ment of my invention has a box-shaped body IIJ
stood that the milling attachment can be handled
open at the bottom and provided with a plate II 45 as one unit and can be easily attached to and
attached to said body by means of bolts i 2. Two
detached from a lathe or the like. The length
bushing blocks I3 are arranged as integral parts
of the key-way is limited by the distance between
of the body I0 adjacent the side wall Ill of the
the steady rest and the tail stock of the lathe and
body, which is parallel to the center line of the
the depth of the key-way can be adjusted by the
lathe. Centrally of said bushing blocks I3 and 50 feed of the tool rest of the lathe.
co-axially with each other two bushings I5 are
Having described my invention, what I claim
located rotatably supporting a shaft I6. This
and desire to secure by Letters Patent, is:
shaft extends forwardly beyond the bushing I5
A keyway cutting attachment for lathes, com
and a pulley Il is rigidly mounted centrally
prising a ñat horizontal support plate detachably
thereon. Between the two bushings I5 a worm 55 mounted upon the tool rest of the lathe, a sub
with a lathe or the like, which can be handled as
one unit for the purpose of attaching it to or re
2,497,170
stantially ñat low horizontal casing secured to
the bottom of the support plate and extending
transversely of the bed of the lathe, the casing
overhanging the bed and having its bottom dis
posed close to the bed, an upstanding vertical
shaft journaled Within the casing and projecting
above the top of the casing and support plate, a
milling cutter secured to the Vertical shaft near
its top and disposed above the support plate, a
i
necting the armature shaft of the motor and
the shaft carrying the Worm, and an upstanding
steady device secured to the casing and extending
above the same and adapted to engage the Work
at its side opposite the milling cutter to prevent
vibration of the Work.
ALONZO R. HITE.
REFERENCES CITED
The following references are of record in the
worm gear secured to the vertical shaft and dis 10
ñle of this patent:
posed within the casing, a horizontal worm
mounted Within the casing and meshing with the
UNITED STATES PATENTS
worm gear and having its axis extending lon
Number
Name
Date
gitudinally of the bed, a shaft carrying the worm
'782,238
Hanson __________ __ Feb. 14, 1905
and extending exteriorly of the casing at one 15
1,038,571
Haase ___________ __ Sept. 17, 1912
side thereof, a motor secured to the casing at its
1,488,806
Church ___________ __ Apr. 1, 1924
end remote from the tool rest and having its ar
mature shaft disposed horizontally and parallel
to the bed of the lathe, gearing operatively con
2,074,844
2,188,447
Hill _____________ __ Mar. 23, 1937
Smith ___________ __ Jan. 30, 1940
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