US1239001A - Switch-frog. - Google Patents

Description

M. S. GRAVES.

SWITCH FROG.

APPLICATION men APR.15. I916.

Patented Sept. 4, 1917.

LII

INVENTOR ATTORNEY LZZEMWM @fl UNITED TATE ATlEhlT FFTQE.

MARK S. GRAVES, OF NORTH YAKIMA, WASHINGTON.

SWITCH-FROG.

Application filed April 15, 1916.

To all whom it may concern:

Be it known that I, MARK S. Gnnvns, a

citizen of the United States residing at.

North Yakima, in the county of Yakima and State of Washington, have invented certain new and useful Improvements in Switch- Frogs, of which the following is a specification.

My invention relates to new and useful improvements in switch frogs and more particularly to an automatic frog.

The primary object of the invention is the provision of a frog so constructed as to prevent pounding and to provide a continuous surface for the wheels of the rolling stock.

A further object of the invention is the provision of an automatic switch frog provided with swinging or pivoted blocks adapted to be operated by the flange of the wheel of the rolling stock.

Another object of the invention is the con struction of a frog in such a manner as to prevent the accumulation of snow or other foreign substances which might interfere with the operation of the same.

With these and other objects in view the invention consists in the novel details of construction and arrangement of parts which will be more clearly understood from the following description and drawings, in which,

Figure 1 is a top plan view of the frog, showing one covering plate removed, and

Fig. 2 is a side view of the frog, parts he i11 broken away.

ltfy frog is equally well adapted for use with street or steam railways and in the drawings, the numeral 1 indicates ties or other suitable supports for the tracks. My improvements comprise a base plate indi cated at 2 which is adapted to be secured to the ties in any suitable manner and said plate 2 is provided with openings provided to receive the spikes 3 or other fastening means for securing the track 4 in position. A frog point is indicated at 5 and may be secured to the plate 2 in any suitable manner. The ends of the track 4 are cut away from the tread portion to a point substan tially midway of the webs, thereby forming an extension 6 and blocks 7 are pivotally connected to the ends of the rails i as is clearly shown by means of the bolts 8 which pass through extensions 9 formed on the blocks 7 and through the tracks a Specification of Letters Patent.

Patented Sept. 4%, rear.

Serial No. 91,419.

and plate 2. The opposite ends of the block 7 are curved as shown at 10 and the purpose of which will be presently described. The curved ends of the blocks engage the end of the switch point 5, as is more clearly shown in Fig. 1 of the drawings.

Castings 11 are formed on the plate 2 or may be secured thereto in any suitable man ner and the inner face of the castings are cut away, as indicated at 12, so as to receive the pivoted blocks 7 when swung inwardly. Springs 13 are secured to the casting in any well known manner and are adapted to engage the face of the pivoted block 7. The springs normally tend to force the pivoted block into engagement with the end of the frog point 5.

A covering plate 14 is adapted to be secured to each casting by means of bolts 15 or other suitable fastening means and the covering plate excludes dirt or other foreign :sfubstances from the working parts of the reg.

ai ing fully described the details of con struction it is thought that the operation and advantages of my frog will be clearly understood. Considerable ditliculty has been experienced in the past in that the rolling stock while passing over the frogs would cause apounding thereby damaging the frog as well as the wheels of the rolling stock. It is the object of my invention to overcome this pounding and to form a continuous surface over which the wheels will pass. While passing over the frog, the tread portion of the wheels will hold one of the blocks 7 stationary and the flange of the wheel will force the other block 7 into the space 12 formed in the casting 11. The blocks 7 being forced inwardly will put the spring 13 under tension and when the flange of the wheel passes over the frog, the block will assume its original position by the pressure of the spring thereon. By providing the curved ends of the blocks 7 it will be seen that the blocks will be operated by the wheels while the rolling stock is passing in either direction. It will be further seen that I have provided a switch frog which may be easily attached to any track and if parts should become broken they can be easily replaced.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is:

1. A switch frog comprising a base, rails receive the blocks, and springs secured to the castings and engaging the pivoted blocks.

2. A switch frog comprising a base plate,

rails secured to the base, blocks pivotally connected to the rails, castings secured to the base, springs secured to the castings and engaging the pivoted blocks, and plates secured to the castings.

3. A switch frog comprising a base plate, rails secured to the base, blocks pivotally connected to the rails, castlngs secured to the base and provided with cutout portions, springs secured to the castings and adapted to engage the pivoted blocks, and covering plates secured to the castings.

' 4E. A switch frog including a base, housings mounted on said base, rails secured to the base, and blocks movably connected to said rails and positioned in said housings.

Copies of this patent may be obtained for 5. A switch frog including a base, housings mounted on salcl base, rails engaging one end of said housings, springs placed in MARK S. GRAVES.

Witnesses E. L. GRAVES, G. A. MYERS.

five cents each, by addressing the Commissioner of Patents,

Washington, I). G.

Images