Untitled record

Application filed May 10,1897. Serial No, 635,786. (No model.)

To all whom it may concern:

Be it known that I, Charles E. Norton, a citizen of the United States, residing at Manchester, in the county of Hartford and State 5 of Connecticut, have invented new and useful Improvements in Car-Wheel-Grinding Machines, of which the following is a specification.

This invention relates to car-wheel, grindio ers, and more particularly to a machine of this class for grinding the wheels of electric cars, the object of the invention being to provide a grinding-machine adapted to grind the wheels of cars without removing the axles 15 from the trucks; and the invention consists in the construction of the machine, as hereinafter described and claimed.

In the drawings forming part of this specification, Figure 1 is a perspective view of my 20 improved grinding-machine, shown in operative relation to the wheel of an electric car. Fig. 2 is a longitudinal section through the base and bed-plate of the machine on line 2 2, Fig. 1.

Referring to the drawings, A represents a portion of a truck of an electric car; B, a portion of the motor having the usual gear connections to the axle C, on which the car-wheel C' is secured. In Fig. 1 these parts of the 30 car are shown in position over a pit, such as is ordinarily used in the repair-shops, a a represent the rails on which the car rests, the truck being shown raised out of contact with said rails by means of a jack-screw D. 2 rep35 resents a metal bed-plate extending over said rails a and having the downturned ends 3, in which set-screws 4 are located, by means of which said bed-plate is secured to the rails. A slot 5, T-shaped in cross-section, is located 40 in said bed-plate 2 and extends from end to end thereof.

represents the base of the grinding-machine, in which is a stud 7, projecting downwardly from the under side thereof and hav45 ing a suitable head thereon for engagement with said slot 5 in the bed-plate 2. Said base has a sliding movement lengthwise on said bed-plate 2 and is rotatable thereon on its said stud 7 to any desired degree. On the 50 end of said base 6, lying over said bed-plate 2, two lugs 8 are cast, through which suitable set-screws may be screwed down into en gagement with the upper surface of the bedplate to lock said base 6 in any desired position thereon. On said base 6 is a slideway 9, 55 having undercut edges, with which the baseplate m of the motor M has a sliding engagement substantially at right angles to the axle C. Said sliding movement is imparted to said base-plate and motor by a feed screw-rod 10, 60 engaging with a stud 12 on the under side of said base-plate and projecting downwardly therefrom into a suitable slot in the base 6 between the sides of said slideway 9, one end of said screw being rotatably secured in said 65 base-plate and the opposite end thereof provided with the hand-wheel 13.

On each side of the base 6, nearest to the axle 0, are pivotally secured two arms 1414“. The opposite ends of said arms are provided 70 with suitably-hinged connections 15 15^a for engagement with the axle C, said arms being made each of two sections and united by turnbuckles 16, whereby the length of each may be increased or diminished, as desired. 75

On the base-plate m is secured the motor M. Said motor may be one of any of the wellknown constructions, the armature 17 thereof being suitably supported, as shown, whereby it may be given an endwise motion in its bear- 80 ings through the field-magnet, and for that purpose a grooved collar 18 is fixed to the armature-shaft 17^a near each end thereof. Two lugs 19, on opposite sides of the base 6, are provided, on which may be pivoted a lever 20, 85 the forked end of which engages with said grooved collar 18 for imparting to said armature-shaft 17“ its endwise motion. An emerywheel 21 is secured on the end of said armature-shaft 17“, in the usual manner,.between 90 suitable flanges, a nut 22 screwing onto the end of the armature-shaft 17“ to hold said emery-wheel in place. The grooved collars 18 serve as a shoulder against which the inner flange of said emery-wheel abuts when 95 the nut 22 is screwed up to clamp said tvlieel to the end of the armature-shaft. In this construction .the commutator of the armature 17 is made of sufficient length to permit of the endwise movement of said armature, as 100 described. Suitable electric connections are made between the binding-posts 23 on the base-plate m with some convenient source of electricity, and suitable connections between

596,336 said posts and the commutator-brushes are also provided, whereby said armature 17 is made to rotate at suitable speed.

The operation of my invention is as follows: 5 The end of a car-truck in which the wheel C' is located (the tread of which is to be ground) is first raised off of the rails a ip any conyem ieut manner. The bed-plate 2 is then placed ou the track substantially parallel with the io axle 3 and in such position as will bring the face of the grinding or emery wheel 21 in proximity to the tread of the car-wheel. The arms 1414^a are then connected to the axle, as described, and the bed-plate 2 is secured to 15 the rails by turning up the set-screws 4. The armature-shaft 17^a is then brought into parallelism with the tread of the car-wheel by means of the turnbuckles 10 on the arms 14 and 14^a, and the base 6 is then secured to the 20 bed-plate by means of the set-screws in the lugs 8 on said base. By manipulation of the feed screw-rod 10 in the base 6 the base-plate m of the motor and all of the parts secured thereto may be moved toward and from the 25 axle C, and the grinding or emery wheel 21 having been set in motion by switching the current into the motor M the operator, by grasping the lever 20 and the feed screw-rod 10, may grind the face of the tread of the 30 car-wheel, as desired, the latter having been set iu motion at slow speed by its own motor and in a direction contrary to the direction of the rotation of the grinding-wheel. If desired, the arms 14 and 14^a may be removed 35 after the device has been set in proper position for grinding the tread of a wheel. Furthermore, jn some cases only one of said arms may be required to make the necessary adjustment or to act as an additional support 40 for maintaining the proper relative positions of the grinding mechanism and the car-wheel during the operation of grinding.

Should it be desired to grind the wheel on the end opposite to that shown in the draw ings, the base G is moved on the bed-plate 2 45 toward the other of said wheels and the emery-wheel 21 placed on the opposite end of the armature-shaft to that shown in the drawings and the lever 20 removed to the opposite side of the base-plate m and connected with 50 the collar 18 on that side.