US344102A - William gill - Google Patents

Description

(N0 Model.)

W. GILL.

BRAKE SHOE.

No. 344,102. Patented June 22, 1886; l

WMZ M464 [wwzar UNITED STATES PATENT EricE.

WILLIAM GILL, OF TORONTO, ONTARIO, CANADA.

BRAKE-SHOE.

SPECIFECATEON forming part of Letters Patent No. 344,102, dated June 22, 1886.

Application filed Februaryl, 18H6. Serial N0.l92,090. (No model.)

To all whom, may concern:

Be it known that l, WILLIAM GILL, 'of the city of Toronto, in the county of York, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Brake-Shoes for Braking the Wheels of Railway-Cars and other Gar-Wheels; and I do hereby declare that the 4following is a full, clear, and eXact description of the same.

The iinprovelnents consist, chieiiy, in the locating and distributing of the chilled and unchilled metals in the face of the brakeshoe, so as to produce ashoe that will be durable in wear, and so constructed that it will not stop the wheels of the cars entirely from revolving until trains arrive at the stations, nor when braking on doWngrades when the trains are in motion and skid the wheels. The action of my brake-slices will consequently not wear iiat spots on the face of the wheels, but 011 the contrary keep the wheelstrue andsmooth,and will protect both the wheels and the rails.

In the accompanying drawings, Figure 1 is a side view of the pattern, and of the chill by which the slioe is made. Fig. 2 is also a side view of the pattern and of the chill by which the shoe is made, the former pattern producing a shoe having slight projecting soft portions on the face of the shoe, the latter pattern producing a smooth-face shoe. Fig. 3 is a transverse section through the line a bin Fig. 1,1epresenting the shoe and the chill. Fig. 4t is a transverse section through the line c d in Fig. 2, also representing the shoe and the chill. Fig. 5 is a face view of the shoe, the dotted lines indicating and distinguishing the surfaces of the chilled and unchilled metals in the face thereof. Fig. 6 is a face view of the chill. Fig. 7 is a transverse section through the side bar of the chill. The chillis shown iilled with sand and ready to receive the molten metal thereon.

Similar letters of reference indicate the same parts in all the views, as in this specification.

Referring to Fig. l, A represents the pattern, which has thinprojecting patches moveably fastened on the face thereof, which produce similar projecting soft patches on the face of the shoe. B represents the chill. The said pattern and chill occupy this position when the mold for the shoe has been made and the flask turned over.

Referring to Fig. 2,A represents the pattern Without the projecting patches on the face thereof, which have been removed in order to produce a smooth-face slice; the chill B, being common to both Without change or adjustlnent, to produce either a shoe with soft projecting patches on the face thereof or a smoothface shoe. The dotted lines on the sides ofthe pattern A show an approximate depth of the chilled metal in the face of the shoe.

Referring to Fig. 3, A represents a transverse section of the shoe, made from the pattern A, with chilled portions b4 in the face of the same, and a soft projecting portion, b5, between the chilled portions, which is made from a projecting patch, b5, on the face of the pattern A, and intersected by the line a b in Fig. 1. S represents the sand notyet removed from the middle ofthe chill B.

Referring to Fig. 4, A represents a transverse section of a smooth-face shoe,madle from the pattern A, with a chilled portion, Za, in the middle of the face thereof, and a soft portion, b5, on each side of the same. s s represent the sand not yet removed from the side apertures in the chill, as will be understood from the sectioii-li1ie c d in Fig. 2.

Referring to Fig. 5, which represents the shoe A and is a face view of the same,the construction of which will be easily understood from the transverse sections of the shoe in Figs. 3 and 4. The dotted lines in this face view distinguish the chilled metal b from the unchilled metal b5 therein, the proportions of which can be varied, as may be required for special shoes.

Referring to Fig. 6, which is a face view of the chill B, and is of one piece of metal,which simplifies and expeditcs the molding of the shoe. It may briefly be here stated that in molding the shoe the pattern A is placed in the flask, With its face up, and the chill B laid thereon. The sand is filled in the aperture b5 of the chill and pressed close down on the face of the pattern, and when turned up the "sand remains in the chill, and when the pattern is removed and the molding complete, and the molten metal poured in the mold, the metal that ,lodges on the face of the chill becomes the chilled portion b, and the metal that lodges on the'sand .s becomes the soft-metal b5 in the face IOC of the shoe, and are distinguished from each other, as shown by the dotted lines in Fig. 5. The side bars, bl, are cast with the chill B, the Whole,as previously stated, forming one piece. These side bars are for the double purpose of keeping the pattern securely on the chill and for rounding the edges of the face of the shoe. The indentations or stops a2 prevent the pattern from shifting endWise on the chill.

I am aware of chilled-face shoes for braking the Wheels of railway-ears having been in use for some time; but I am not aware of any such shoes having been constructed with a single chilled portion in the face of the same, which single chilled portion being so located and distributed with the unchilled metal as to obtain the proportions of each so that the properties of both the metals will act te the best advantage on the face'of the wheels; and, further,

the single chilled portion being longitudinal, and extending from end to end in the face of the shoe, forms a girder and greatlystrengthens the cross-section of the same.

I ain aware of apatent granted to D. Prew, N o. 308,430, patented November 25, 1884, in which pat-ent I find a chilled strip down the middle of the face of the shoe, leaving a por-v tion of nnehilled metal on each'side ofthe same, which must be for a different purpose than this invention, as it would leave a ridge on the 3o middle of the rim of the Wheels.

Having thus described my invention in aecordance With Rule 40 of the Rules of Practice for United States, I claini- A brakeshoe constructed with a single longitudinal chilled portion in the face thereof and extending the full length of the face, and portions of said chilled portion reaching to the edges of the shoe and having soft portions of metal on each side of and in the middle ofsaid chilled portion, substantially as shown and described, as a new manufacture.

WILLIAM GlLL.

Vitnesses:

SAM. MUNRo, W. T. WooDBRiDGE.

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