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Патент USA US2116491

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May 3, 1938.
A. w. MALL ‘
ANGLE GRINDING SPINDLE
Filed Dec. 19, 1956
I
2,116,491
2,116,491
Patented May 3, 1938
UNITED STATES PATENT OFFICE
2,116,491
ANGLE GRINDING SPINDLE
Arthur William Mall,‘ Chicago, 111.
Application December 19, 1936, Serial No. 116,770
4 Claims. ‘(01. 51-470)
My invention relates to improvements in angle
spindles and similar devices for supporting grind
ing wheels.
-
My invention relates more particularly to angle
:- spindles for use in connection with face grinding
on rail joints and other places upon railway
tracks.
a
The principal object of the present invention is
to provide an improved angle spindle for support
1() ing a grinding wheel.
,
A further object is to provide in an angle
spindle of the type described an improved handle
and guard member.
A further object is to provide in an angle spindle
15 of the type described improved means for per
mitting an operator to throw his weight on-the
grinding wheel during operation, thereby causing
quicker and more efficient grinding.
A further object is to provide an improved at
20 tachment for an angle spindle of the type de
scribed whereby all of the above objects can be
accomplished.
Other objects and advantages will be more ap
parent from the following description wherein
25 reference is had to the accompanying sheet of
drawings upon which
Fig. 1 is a front perspective view of my im
proved angle spindle and grinding wheel in work
ing position on a track rail joint;
30
Fig. 2 is a plan view thereof; and
Fig. 3 is a sectional view through the spindle
handle and guard member taken on the lines
3—3 of Fig. 2.
The angle spindle which I have chosen to il
35 lustrate my invention may be generally similar
to that shown in the patent to Arthur William
Mall, granted on August 28, 1924, No. 1,971,790,
the only difference being that no water valve and
connection therefor is included, inasmuch as
40 water is not used for the grinding wheel to which
this application relates.
The unit may include an angle casing 10 hav
ing a ?exible drive shaft 12 connected thereto for
the purpose of driving a vertical spindle l4 suit
ably mounted therein and provided at its lower
end with a face grinding wheel I6. The grind
ing wheel is provided with a protective top and
side covering member l8 which prevents an op
erator from coming into bodily contact with the
50
side or top portions of the grinding wheel. The
angle spindle casing 10 is provided with a handle
member 20 extending at right angles to the ?exi
ble drive shaft housing 22, and in the devices of
55 the prior art this handle has been employed to
guide and manipulate the grinding wheel dur
ing use of the same.
In accordance with my invention I have pro
vided a combined guard and handle extension 24
which is formed with a square block 26 welded 5
to the bottom side thereof. The block 26 may be
formed with a tapered opening 28 to ?t over the
tapered handle 20 and be locked thereon by a set
screw 30. The combined guard and handle ex
tension is provided at ‘its forward end with a 10
vertical rod member 32 screw threadedly mounted
therein. The member 24 may be generally shaped
as shown to be positioned when mounted in an
operative manner over one side of the grinding
wheel so that pressure may be brought to bear 15
upon one side thereof only. For example, as
shown in Figs. 1 and 2, the grinding wheel is being
used upon the joint between the rail sections a
and b, and as will be evident, the operator’s fore
arm and hand may be rested upon the same to
bring a considerable pressure upon the grinding
20
wheel at the particular point where the grinding
operation is taking place.
A great many advantages have been found to
result from the above construction. For ex N)
ample, when grinding on a track with this con
struction, it is possible for the operator to place
his weight on the assembly, which eliminates a
certain amount of fatigue and enables the op
erator to grind more steadily. It is also possible 30
to maneuver the grinding wheel to permit grind
ing on a very small surface of the rails to be
ground. The amount of grinding at one point is
also regulated, depending upon how much the op
erator presses down on the combined handle and 35
guard extension.
It is frequently desirable in grinding with a
wheel of this type, to grind a comparatively small
spot, say 2" long. Without the special handle
member it is very difficult to keep the grinding ef- 40
fort on a small spot, the entire grinding wheel
being approximately 8" in diameter, which makes
it difficult to handle the assembly by the use of
the handle 20. With the construction I have
provided, the operator may tip the wheel as he is 45
grinding to conform to the contour of the rail
surface.
Another advantage of this construction lies
in the fact that an operator may more easily lift
the grinding assembly with one hand to examine 50
the work, thus saving considerable time for the
operator in a grinding operation. It is also 0b_
vious that with the additional member 24 secured
to the casing handle, the entire assembly may be
laid upon its side resting upon the grinding wheel 55
2
2,116,491
shield l8 and the edge of the member 24. This
position may be had while the grinding wheel is
in motion. In this manner the member 24 acts
as a bracket to hold the face of the grinding wheel
in a vertical position.
said spindle, a handle on said casing formed in
While the exact shape or position of the mem
said combined guard and platform member having
ber 24 may be varied if desired, it will be obvious
that to position the same generally as shown and
provide a comparatively broad surface, that it
makes an ideal arm rest for the operator and
permits him to place considerable weight upon
the grinding wheel without having any parts of
his arm become sore or bruised.
'
While I have illustrated and described a spe
15 ci?c embodiment of my invention, it will be
apparent to those skilled in the art that changes
and modi?cations'may be made in the exact de
tails shown, and I do not wish to be limited in
any particular, rather what I desire to secure and
20 protect by Letters Patent of the United States is:
1. Apparatus of the class described comprising
an angle shaped casing having a vertical drive
spindle therein, a ?exible drive shaft for said
spindle extending from a side of said casing, a
face grinding wheel secured to the lower end of
said spindle, a handle on said casing formed in
tegral therewith and extended horizontally there
from and a combined guard and platform mem
ber secured on the top of said handle and ex
tergral therewith and extended horizontally
therefrom and a combined guard and platform
member secured on the top of said handle and
extended over only one side of said grinding wheel, 5
a vertical auxiliary handle secured at one end
thereof.
,
3. Apparatus of the class described comprising
an angle spindle, a grinding wheel secured to the
lower end thereof, a drive for said grinding wheel
including a ?exible shaft entering the side of said
angle spindle, a handle on said angle spindle at
right angles to said ?exible shaft and a platform
member connected to said handle, said platform
member being ?at and overlying one side of said
grinding wheel whereby an operator may bring
pressure on only one side of said grinding Wheel,
said platform having a vertical post member at
its forward end to provide a hand grip- thereon.
4. Apparatus of the class described comprising
an angle shaped casing having a vertical drive
spindle therein, a ?exible driveshaft for said
spindle extending from a side of said casing, a
face grinding Wheel secured to the lower end of
said spindle, a protective top and side covering
member for said grinding wheel, a handle on said
casing formed integral therewith and extending
horizontally therefrom, and a combined guard
30 tended over only one side of said grinding wheel.
and platform member secured on the top of said -
2. Apparatus of the class described comprising
an angle shaped casing having a vertical drive
spindle therein, a ?exible drive shaft for said
spindle extending from a side of said casing, a
35 face grinding wheel secured to the lower end of
handle whereby the entire assembly may be laid
on one side resting on the grinding Wheel side
covering and the edge of the guard and handle
member.
ARTHUR WILLIAM MALL.
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