US1163923A - Brake-shoe. - Google Patents

Description

T. P. HINES.

BRAKE SHOE. APPLICATION FILEIYJUNE 9.1915.

Patented Dec. 14, 1915.

Elvwemtoz T F HINES carton.

THOMAS P. HINES, 0F GASTON, OREGON.

BRAKE-$151015.

Specification of Letters Patent.

Patented Dec. 14:, 1915.

Application filed June 9, 1915. Serial No. 33,126.

To aZZ whom it may concern.

Be it known that I, THOMAS P. Hmns, citizen of the United States, residing at Gaston, in the county of lvashington and State of Oregon, have invented certain new and useful Improvements in Brake-Shoes, of which the following is a specification, reference being had to the accompanying drawings.

My present invention relates to new and useful improvements in brake shoes and has particular reference to those of the type which are especially adapted for use in con nection with horse drawn vehicles.

Primarily, it is the object of this inven tion to provide a simple form of shell or back piece in which a wooden or composition wheel engaging block may be removably inserted so that when, after considerable service, a block has been worn down, it may be removed and a new block substituted.

More specifically, the invention has for its object the provision of a brake shoe which consists essentially in, a shell or back piece having flanges, which define parallel channels for the reception of the longitudinal edges of a wheel engaging block, and a pair of swingingly mounted plates, which are attached to the flanges and are provided with lugs adapted to close the upper ends of the channels for holding the block against displacement therefrom.

The above, and other incidental objects of a similar nature, which will be hereinafter more specifically treated are accomplished by such means as are illustrated in the accompanying drawings, described in the following specification, and then more particularly pointed out in the claims which are appended hereto and form part of this application.

With reference to the drawings, wherein there has been illustrated the preferred embodiment of this invention, as it is reduced to practice, and throughout the several views of which similar reference numerals designate corresponding parts, Figure 1 is a perspective view of the preferred form of the brake shoe; Fig. 2 is a face view of the wheel engaging face of the shoe with the two corners of the shoe partly in section; Fig. 3 is a detail fragmentary perspective view showing the manner in which the upper ends of the block receiving channels are adapted to be closed to prevent the displacement of the wheel engaging block; Fig. 4 is a detail fragmentary perspective view of the lower end of one of the channels.

As best disclosed in Fig. l of the accompanying drawings, the brake shoe of the present invention includes a shell or back nal edges of the back plate and are consequently disposed in parallel spaced relation to each other, and a pair of inwardly directed flanges 15 which are formed on the outer edges of the side plates and are longitudinally curved so that they conform to the curvature of the inner face of the back plate. The flanges 15 are equi-distantly spaced from the adjacent inner face of the back plate at all points throughout their length so that channels, indicated at A and B, are formed to receive the longitudinal edges of the block 11. At the lower end of the back plate and between this member and the flanges, extend the shoulders 16, which close the lower ends of the channels A and B, and therefore prevent the block 11 from moving beyond the lower end of the back plate.

The block 11 is preferably made of wood,

as is customary in the construction of brake I shoes for farm wagons or similar vehicles, but if so desired, it may be fashioned from a composition of any desired kind. In this connection it is to be explained that while the present brake shoe is designed particw larly for use in connection with horse drawn vehicles, it may, nevertheless, be efliciently employed in making brake shoes for railway trains by employing the shell in connection with a filler block of a compcsition of the type now in use on many railway systems.

The upper ends of the channels defined by the side plates of the flanges are open,

but may be closed by means of the lugs or I.

shoulders 17, which extend inwardly from the free ends of the plates 18. These plates 18 are pivotally mounted at their lower ends upon bolts 19 and are shaped to lie within .the transverse limits of the side plates when awayv from the back plate.

' light vehicles, such as spring wagons.

ends of the channels. As a means for holdin the lates in )osition wherein the lu s b 1 7 23 close the upper ends of the channels A, I employ a pair of springs 20 which are similar in construction, each consisting preferably of' a single length of resilient wire which is provided at its inner end with an eye 21 and at its outer end with a finger or hook 22. The eye of each resilient catch is freely received upon a bolt 23 carried by the plate 18 adjacent to the free end thereof. As will be readily observed upon reference to Fig. 1 the fingers or hook portions of the spring catches are adapted to engage over the outer face of the back plate for holding the plates 18 against swinging movement The plates 18 are limited in their swinging movement in the other direction by the engagement of the lugs 17 against the back plate, as shown best in Fig. 3.

As a means for attaching the brake shoe to the brake beam of a vehicle, the attaching lug previously designated by the numeral 12 may be employed as in Fig. 1. This lug is-preferably semi-cylindrical in shape and is formed as an integral part of the back plate. A bore, indicated at 2A is formed in the lug to receive the brake beam of the vehicle, in case this member is of the rod type, which is generally employed of? pair of set screws, indicated at 25 may be threaded through the lug for engagement with the brake beam for holding the brake shoe against rotation thereon.

In concluding the description of the form of the invention shown in the accompanying drawings, I desire to particularly call attention to the fact that the movable closure shoulders for the channels are located at the upper end of the brake shoe, while the integral lugs are located at the lower end, since a downward thrust is put upon the block 11 when the brake shoe is applied to the wheel. It is obvious that this feature of construction is productive of a considerable advantage, since the integral lugs are better able to withstand the thrust than are the movable members 17. In case considerable thrust were put upon these latter members, the entire pull would have to be borne by the pivot m that the conditions concurrent with the l adoption of this device will necessarily vary, it is desirable to emphasize the fact that various minor changes in the details of construction, proportion and arrangement of parts may be resorted to, when required, without sacrificing any of the advantages ofthis invention, as defined by the appended claims.

"What is claimed is e 1. .A vehicle brake shoe including a metal lic shell havingalongitudinally curved back plate, side plates extending along the longi:

tudinal edges of the back plate and at right angles thereto, inwardly extending longi tudinally curved flanges extending from the outer edges of the side plates forming channels, a wheel engaging block having its longitudinal edges removably inserted in said channels, fixed stops formed at the lower ends of the channels for limiting the downward movement of the block through the channels, and movable-shoulders supported by the side plates at the upper ends of the channels adapted to engage over the upper end of the block for retaining the same against upward displacement from the shell.

2. A vehicle brake shoe including a metal shell consisting of a back plate, parallel side plates extending from the longitudinal, edges thereof, inwardly directed flanges formed on the outer edges of the side plates, to define in connection therewith longitudinal channels,

,a wheel engaging block having its'longitudinal edge portions inserted in the said channels, and shoulders formed integrally with the top plate, side plates and flanges at the lower ends thereof to bridge the channels i for limiting the downward movement of the block through the channels, and movable shoulders carried at the upper ends of the side plates, said shoulders being adapted to engage over the upper end of the block for holding the same against upward displacement from the shell. 7 r

3. A vehicle brake shoe includinga metallic back plate, parallel side plates formed on the longitudinal edges thereof, inwardly directed flanges formed on the outer edges of the side plates and extending in spaced relatlon to the back plate, defining in connection with the back plate and side Plates, longitudinal channels, a wheelengaging block having its longitudinal edges seated in-the channels, shoulders traversing the channels at the lower endsthereof for limiting the downward movement of the block through the channels, plates pivoted to the upper ends of the side plates, integral shoulders formed on the free ends of the plates, said shoulders being movable into engagement with the upper end of the blockfor holding the same against upward displacement from the channels.

' 4. A vehicle brake shoe includinga metallic back plate, parallel side plates formed on the longitudinal edges thereof, inwardly directed flanges formed on the outer edges of :3

the side plates and vextending in spaced'relation to the back plate, defining in connection with the back plate and side plates, longitudinal channels, a wheel engagingblock having its longitudinal edges seated in the channels, shoulders traversing the channels at the lower ends thereof for limiting the downward movement of the block through the channels, plates pivoted to the upper ends of the side plates, integral shoulders formed on the free ends of the plates, said shoulders being movable into engagement with the upper end of the block for holding the same against upward displacement from the channels, and yieldable means carried by the pivoted plates and engageable with the back plate for holding the shoulders against movement and consequent disengagement with the block.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

THOMAS P. HINES. Witnesses:

A. W. FREEBERG, H. A. KRAHMER.

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

Images