Патент USA US2116491код для вставки
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.