US1312680A - Brake-bob jaw - Google Patents

Description

S. H. CAMPBELL.

- BRAKE ROD JAW. APPLICATION FILED 1Au.2o.191 9.

1 3 1 2, 680 Patented Aug. 12, 1919.

Fig.,3. 13

18 WITNESS INVENTOR- S. H. Campbell r THE COLUMBIA PLANOGRAPH co., wAsmmiroN, n. C.

STERLING H. CAMPBELL, OF ST. LOUIS, MISSOURI.

BRAKE-ROD JAW.

Specification of Letters Patent.

7 Application filed January 20. 1919. 7 Serial No. 272,024.

To all whom it may concern:

Be it known that I, STERLING H. CAMP- BELL, a citizen of the United States of America, residing at the city of St. Louis, State of Missouri, United States of America, have invented certain new and useful Brake-Rod Jaws, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to a brake rod jaw and more particularly to a one piece cast aw.

The object of my invention is to so construct the jaw as to secure a substantially uniform distribution of metal throughout the jaw and to provide means for inspecting the walls of the rod seat and further to so construct the jaw as to avoid the formation of pockets which might retain the molding sand or trap the hot gases escaping from the metal when the jaw is cast.

In the accompanying drawings which illustrate one form of brake rod jaw made in accordance with my invention, Figure 1 is a side view, Fig. 2 is an edge View, Fig. 3 is a longitudinal central section, and Fig. 4 is a section taken on the line 4-4 of Fig. 3.

It has been found that a one piece cast brake rod jaw of the general type shown in patent to Haskel, No. 608,392 of August 2, 1898, is one of the simplest and most satisfactory forms of jaw. Heretofore, however, some difficulty has been encountered in casting this form of jaw. First, because of the unequal distribution of metal in the jaw, owing to the comparatively great bulk of the jaw seat and also owing to the formation of pockets which, are likely to retain the sand or to trap the hot gases escaping from the cooling jaw. The unequal distribution of metal in the jaw is likely to produce internal cracks and fissures in the rod seat and as these cracks or fissures do not as a rule extend to the surface of the metal their presence cannot be discovered until the jaw breaks. One object of my invention is to so form the jaw as to secure substantially u iform distribution of th m tal at the same time giving access to the walls of the rod seat for inspection of'the same and furthermore to prevent formation of sand or gas pockets.

7 10 represents a pair of parallel arms or jaw members each of which is provided at its outer end with an opening 11 for the passage of the coupling pin for securing the jaw to the brake lever. Each of these openings 11 is surrounded by an outwardly extending boss 12 the inner ends of the arms 10 terminating in loops 1.3 one of which is adapted to surround the body 14 of the brake rod and the other the return portion 15, said parts being separated by the bend 16 which is adapted to bear against the rod seat 17 which is formed in part of the inner walls of loops 13. These walls, however, are separated by a transverse passage 18 which is flared at both sides as best shown in Fig. 4 so as to secure substantially uniform distribution of the metal throughout the inner end of the jaw and at the same time allow inspection of the walls. In order to prevent the accidental disengagement of the rod 14:, its return portion 15 has its end 19 upset to fill a countersink 20 formed at the outer end of the loop 13, as best shown in Fig. 3.

To strengthen the arms 10 each of said arms is provided with a pair of ribs 21 which ribs extend from the loops 13 to a point at each sideof the boss 12 but do not contact with said boss so that the formation of pockets liable to retain the sand of the mold are obviated. Between the ribs 21 each of the arms 10 is preferably provided with an opening 22 for the passage of the heated gases from the cooling metal of the aw.

I am aware that two part cast brake rod jaws have heretofore been formed in which the rod seat was provided with a transverse cylindrical passage for the bolt or rivet holding the two parts of the jaw together, and I hereby disclaim such construction.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A one piece cast brake rod jaw comprising a pair of arms terminating at their inner ends in rod loops, theinner Walls of Patented Aug". 12, 1919.

' ing flared at both sides.

3. A one piece castbrake rod jaw comprising a pair of arms each provided at its outer end with an-opening-for coupling pins, each of said openings beingprovided with an outwardlyextending boss, and-a pair of my hand and aflixed my seal.

outwardly extending strengthening flanges foreaeh of said arms extending at each side of said boss, but unconnected therewith.

4:. A one piece cast metal brake rod jaw having substantially uniform walls, said wallshaving a transverse opening therein forming a hollow rod seat, and retalning means ad acent to said seat for cooperating 'witha "portion of a rod to hold the latter against longitudinal movement in either direction.

In testimony'w hereofl have hereunto-set STERLING H. CAMPBELL. if 5.

Copies of: this patent may be obtained-for five cents each, by addressing the Commissioner of Patents, Washington, D. 0'.

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