US1304049A

US1304049A - Earl httber

Info

Publication number: US1304049A
Authority: US
Publication date: 1919-05-20
Anticipated expiration: 1936-05-20

Description

E. HUBER. LOCKING KEY FOR BRAKE SHOES. APPLICATI man NOV. I5. 1917 1,304,049. Patented May 20, 1919.

i liq/Ersatz far/Ember.

iFOJEISIL'YaS- UNITED STATES PATENT OFFICE.

EAnI. HUBER, or CLE ELAND, oIIIo, ASSIGNOR 'ro CIIICAoo IzAInwAY EQUIPMENT COMPANY, or CHICAGO, ILLINOIS, A CORPORATION or ILLmoIs.

LOCKING-KEY FOB BRAKE-SHOES.

Specification of Letters Patent.

Patented May 20, 1919.

Application filed November. 15, 1917. Serial No. 202,829.

To all whom it may concern:

Be it known that I, EARL HUBER, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful Improvement in Locking-Keys for Brake- Shoes, of which the following is a specification, the principle of the invention being herein'explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other 1nventions. j

The present invention relates to keys for holding brake shoes to brake heads and more particularly has for its object the provision of a key which can be used with the standard brake head and shoe of the Master Car Builders Association and which will be securely locked in position when in use so that it cannot loosen and fall out as do keys of the present type. To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claim.

The annexed drawing and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawing:

Figure 1 is a perspective view of my improved key; Fig. 2. is a vertical section through a brake head and shoe showing my improved key in position,'and Fig. 3 is a sectional view taken on the line 3-3 Fig. 2.

The drawings show a standard brake head and shoe of the Master Car Builders Association, which is the equipment used on all the railroads in this country. As shown, the brake head 1 is provided with two contact lugs 2, between which is a slot adapted to be engaged by the center lug 3 formed on the rear face of the brake shoe 4. The two ends of the brake head are U shaped, whlch provides an opening 5 through which a key 11 maybe inserted.

The two lugs 2 on the brake head 1 and the center lug 3 on the shoe 4 have alined openings 6 and 7 through which the key 11 is adapted to be passed. As shown in Fig.

2, these openings are not in direct alinement, but the rear wall 8 of the opening 7 through the center lug isin front of the walls 9 of the openin 6 through thelugs on the brake head. his allows the key to contact the front walls 10 of the apertures 6 through the brakehead lugs and the rear wall 8 of the aperture 7 through the lug on the brake shoe, thus keeping the brake shoe tight against the forward faces of the lugs on the head.

The present key 11 is of the same eneral form as the key made standard by tfi e Master Car Builders Association, being curved slightly and tapering from one end to the other. The key is provided at its outer end with a projection or lug 12 formed on theooncave side 13 of the key head 14. r

. The lug 12 is preferably formed by bodily bending the key near its headed end thus preserving the same thickness of metal throughout the length of the key, and enabling such jog'or bend to be formed either at the time the key is forged (if such is its method of manufacture) or malleableized, or after the key is made. Thus it is possible to use old types of keys before or after they are placed in service, and shape them to form the locking projection shown. This locking projection, when formed, provides anti-clinal .surfaces' which are adapted to cam the key in its movement both into and out of engagement with the shoe, and hence the key is easily manipulated while the locking' projection provides an eflicient and secure lock for preventing loss or accidental displacement of the key and shoe.

The key will be driven in placeas usual and when forced through the openings in the lugs will be in the position shown in Fig. 2 with the projection 12 forced below the extending portion 15 of the brake shoe, thus locking the key in position and preventing the accidental removal of the same.

As the key is the only look between the shoe and the head, it will be readily seen that the loss of the key allows the brake shoe to fall out. The shoe contacts with the brake head on the lugs 2 and has aclearance at the ends as shown at the points 16 which adjacent the key allows the shoe to rock slightly and aline A of the standard key (here shown in dotted lines under the point 17 on the brake head).

By my present locking means I can use a much shorter key than is now standard, thereby effecting a saving in metal and yet the key is securely locked in position at all times. The removal of the key is a simple matter as it merely has to be sprung back sufliciently to allow the projectlon to pass the point on the shoe and this is easily done as the rounded surface of the prQ ection will readily come over the shoe once it is started.

Other modes of applying the principle of my invention may be employed instead of 'the one explained, change being made as regards the mechanism herein disclosed, proweenie vided the means stated by the following claim, or the equivalent of such stated means, be employed.

1 therefore particularly point out and distinctly claim as my invention A locking key for brake shoes which is slightly curved and tapered and which key is also provided with a locking projection near the extremity of its thickened end, said locking projection having anti-clinal camming surfaces adapted to cam the key in its movement both into and out of engagement with the shoe.

Signed by me, this 13th day of November, 1917.

EARL HUBER.