US1250515A - Brake-shoe mechanism. - Google Patents

Description

C. Vl ROTE.

BRAKE SHOE MECHANISM. A PPLIcATloN FILED DEc.21.191s.

1,250,515. 'Patented De@.18,1917;

@s Info/ member be brought into engagement with wnivrrrn srarns rATENT OFFICE.

CHARLES V. ROTE, 0F LANCASTER, PENNSYLVANIA. ASSIGNOR TO C. V. ROTE BRAKE SHOE C0., OF LANCASTER, PENNSYLVANIA, A CORPORATION OF DELAWARE.

BRAKE-SHOE MECHAN ISM.

Speciication of Letters Patent.

kPatented Dec. 18, 191 '7.

Application led December 21, 1916. Serial No. 138,206.

To all whom t may concern:

Y Be it known that I, CHARLES V. ROTE, a citizen of the United States, residing at Lancaster, in the county of Lancaster and State of Pennsylvania, have inventednew and useful Improvements in Brake-Shoe Mechanism, of which the following is a specification. l

This' invention relates to brake mechanisms and has particular reference yto brake shoe devices of the type now generally employed.

Brake shoe mechanisms now in general use comprise a head, a shoe having a single central keeper and known as the Master Car Builders shoe, and a keyI which extends longitudinally through the head and through the central keeper of the shoe so as to lock the latter to the head. The shoe is usually provided with an indicating mark or danger line, andwhen the shoe has become wor-neA downto this mark, it `is intended that the shoe be removed. The partially worn shoe is removed from the head and discarded While it still possesses utility to a considerable degree. Under the present' practice the shoe is discarded or scrapped while the body portion thereof is still of substantial thickness in apprehension that the samewill become entirelv worn through and the front face of the head broughtiinto engagement with the periphery of the car wheel, which would result in serious damage to the head, and this is rather costly, and this scrap represents an immense loss to railroad companies.

It is the object of this invention to provide means whereby the shoe may be almost completely worn away and thus eliminate the necessity of removing it .from the head and scrapping the same while it still pos. sesses considerable utility as a frictional member. In accordance with my invention, I provide a relatively inexpensive intermediate member which is adapted to be interposed between the brake head'and the brake shoe and, preferably, the intermediate member and shoe are securedto the head by means of a single key.

The intermediate member can be produced at a slight cost and is inexpensive v'as compared to the head, so that if the shoe should become worn away, through either inadvert-v enoe or carelessness, and the intermediate the car wheel, resulting in damage to the intermediate member. little injury would be done, vfor thecost of replacing the worn intermediate member with a new one would be slight. Thus it is permissible to allow the shoe to be worn down to a greater extent than is now provided for.

. The intermediate member may be attached to the types of brake heads now generally employed, and the shoe and intermediate member secured by the usual key now `used to lock the Master Car Builders shoe to the head. Thus, if a company having its railroad equipped with old types of heads, wishes to use my improvement, it is not necessary to scrap the old brakel shoe mechamsms.

A further object of `my invention is to provide means for adjusting the shoe relative to the head so that the shoe throughout its wearing face may correctly engage the peripherv of they car wheel, although the brake head is not in correct position relative thereto. Itis found, not infrequently,that

the head is not properly hung so that when the shoe, or shoe and intermediate member, are secured to the head, the wearing face of the shoe is eccentric to the periphery of the car wheel, and due to this condition, one end of the Vshoe will be worn through before the other end thereof. By the use of the means herein described, the shoe may be adjusted so that its wearing face is concentric tothe periphery of the wheel, although the frontface Vof thebrake head is eccentric;

thereto. V Y

The above and other objects of my invention are obtained in the structures described in thefollowing specic'ation and illustrated in the accompanying'drawings, andY wherein- Figure l is a side elevationalview showingV a type of brake'head now in general use to which is secured my improved intermediate member and a brake shoe having a single keeper.l

Fig. 2 is a, rear View of the intermediate member shown in Fig. l with a brake shoe positioned thereon.

' Fig. 3 is a vertical sectional view showing a 'modified form of Lmy improved intermediate member as applied to an old form of brake head and having a brake shoe secured thereon.

Fig. 4; is a rear viewV of the intermediate member shown applied in Fig. 3, the intermediate member having positioned on its front face a brake shoe such as is described in an application for Letters Patent filed by me Nov. 20, 1916, Serial No. 132,331.

Referring to the drawings, wherein like numerals represent like parts in the several views, 10 designates an old form of brake head now in general use, the head having an opening 11 to permit the head to be attached to a brake beam or hanger. 1t is noted, however, that the manner of attaching the brake head to the shoe is immaterial as the same forms no part of my invention. The brake headis provided with a pair of centrally disposed keepers 12 having the usual keyways for the reception of a tapered key 13 which is adapted to extend longitudinallyvv through the head in the manner shown in Figs. 1 and 3.

The brake shoe comprises a body portion 14; having a centrally disposed lug or keeper 15 which is adapted to be received between the keepers 12 on the head. The shoe is provided with guide lugs 16 for a purpose herein described.

1n the embodiment shown in Figs. 1 and 2, my improved intermediate member comprises a relatively thin body portion or plate 17 which is curved to correspond to the curvature of the shoe 1l. The intermediate member is provided with a central transverse opening 18 which extends throughout the width of the member and, for the purpose of reinforcing the member 17 and securing its opposite ends together, I provide side flanges 19 which are arched adjacent the opening 18 in the manner shown in Fig. 1. Upon the rear face of the intermediate member and adjacent its opposite ends are seats or lugs 2O which are adapted to engage between the bifurcated ends of the brake head in a manner understood by those familiar with the art. Adjacent the lugs 20l are openings 21 which are adapted to receive the lugs 16 of the brake shoe.

lWhen it is desired to use the intermediate member illustrated in Figs. 1 and 2, the brake shoe is positioned on the front face of the intermediate member with the central keeper 15 protruding through the slot or opening 18 of the intermediate member, and the lugs 16 of the shoe engaging in the apertures 21 of the member. The intermediate member is then positioned against the front face of the brake head with the flanges or arches 19 positioned to either side of the head. The key 13 is then inserted lengthwise of the head through keyways in the keepers 12 on the head 10 and the keeper 15 of the shoe so that both the intermediate member and the shoe are secured to the head by the same key.

The shoe is retained upon the intermediate member until it is almost worn through, and

as has been explained, since the intermediate member is relatively inexpensive, it is not necessary to remove the shoe when it is but partially worn. After the shoe is so worn than but little remains thereof, the key 13 Vis withdrawn and the shoe let is moved transversely of the intermediate member, this being permissible as the flanges 19 are arched and the opening 18 extends throughout the width of the intermediate member. To insert a new shoe, it is merely necessary to position the same upon the front face of the intermediate member by bringing the keeper 15 into alinement with the opening 18 of the intermediate member and then moving the shoe transversely into position. This is an important feature for the clearance between the front face of the intermediate member and the periphery of the wheel is slight, and by providing means for inserting the shoe transversely of the intermediate member it is not necessary to swing the head away from the wheel when it is desired to secure the shoe to the intermediate member. By engaging the lugs 16 of the shoeJ in the openings 21 of the intermediate member the shoe is retained against relative displacement, and, furthermore, in event that the shoe should be broken, the lugs would ,prevent thev broken parts from slipping down between the intermediate member and the car wheel and falling onto the track. I

Referring now to the embodiment shown in Figs. 3 and et, the intermediate member comprises a skeleton pla-te 22 provided with a central transverse opening 23 adapted 'to receive the keeper 15 ofthe old form of brake shoe, as shown in Fig. 3. The intermediate member is also provided with a pair of spaced-apart slots 24C adapted to receive, as shown in Fig. il, the spaced-apart keepers 25 of my improved brake shoe 25, which brake shoe is shown and described in Letters Patent, No. 1,213,419, granted to me January 23, 1917, and application for Letters Patent Serial No. 132,331, filed by me Nov. 20, 1916` Along one side of the intermediate member is an upstanding iange 26 having spaced-apart apertures 27 which are adapted to receive the blades 28 of a retaining key 29. The intermediate member 22 is provided with transverse arches 30 which are spaced-apart so as to receive the keepers 12 and which form keyways for the reception of the key 13 as shown in Fig. 3. Located between the arches 30 and on either side of the opening 23 are a pair of seats 31 enw gaging against the keepers 12 of the head when the member is positioned'thereon. Adjacent the openingl 23 and securing the opposite ends of the plate 22 together are flanges or bridges 19 which may be arched as are the bridges 19 in the previous embodiment.

l/Vhen the intermediate member shown in the second embodiment of my invention is employed, the intermediate member 22 is positioned against the front face of the brake head 10 with the keepers 12 of the brake head positioned between vthe arches or keepers 30 of the intermediate member, and in this position the keepers 12 are in engagement or rest upon the seats 31 of the intermediate member. The lV aster Car Builders shoe, when it is desired to use the same, is then positioned against the front face of the intermediate member with the keeper 15 of the shoe engaging in the transverse opening 23 ofr the intermediate member, and between the lugs 12 of the brake head. After the parts are in this position, the key 13 is inserted longitudinally of the headthrough the keepers 80, 12 and 15, of the intermediate member, brake head and brake shoe, respectively, so that the parts are securely fastened against relative displacement.

If it is desired to use the type of4 brake shoe 25 described in my aforesaid applications, and shown in Fig. l of the drawings, the intermediate member 22 is secured to the brake head by means of the key 13 and the brake shoe 25 is then positioned against the front face of the intermediate member with the keepers 2 5 of the brake shoe engaging in the slots 24 of the intermediate member. The blades 2S of the key 29 arelhen inserted in the apertures 27 of the flange 26 and moved transversely of the shoe so that they will extend into and through the keyways of the keepers 25. Y

1t will be noted that with the construction shown in Figs. 3 and 4, either the old type of Master Car Builders shoe may 'be employed in combination with the intermediate mem-I ber 22, in which case a single key is employed to lock the intermediate member and the shoe to the head, or the type of shoe described in my aforesaid applications may be separately1 secured to the intermediate member by means of the key 29 inserted transversely of the intermediate member.

In Figs. 3 and 4, I have shown means for adjusting the shoe relatively to the head, this means comprising a T-shaped shim plate 32. The cross-member or head of the T- plate is adapted to rest upon the seats 31 of the intermediate member 22, and if a swellback shoe, suoli as is shown in Fig. 4: is used. the long leg of the T rests upon the rear face of the brake shoe 25. As seen from Fig. 3, the shim is adapted to lie between the keepers 12 of the brake head and the seats 31 on the intermediate member 22, and with this construction, one end of the shoe is thrown farther away from the head than the other end. When it is found that the brake head is eccentric to the shoe, the shim plate 32 is positioned upon those seats 31 of the intermediate member nearest the end of the head which is farther from the periphery of the car wheel. rlhus that end of the brake shoe which would be farthest from the periphery of the wheel, if the shim plate were notemployed, is blockedup or away from the head so that the front face of the shoe is concentric te the car wheel periphery.

What l claim is hln a brake shoe mechanism, a brake head, a brake shoe, an intermediate member interposed between the head and shoe, and a key extending longitudinally through the head for securing both the shoe and the intermediate member to the head.

2. In a brake shoe mechanism, a head having transversekeepers, a shoe having a transverse keeper, an intermediate member interposed between the shoe and the head, and a key adapted to be inserted longitudinally of the head through the keepers of said shoe and head.

3. 1n a brake shoe mechanism, a brake head having transverse keepers, a brake shoe having a transverse keeper, an intermediate member interposed between the head and the shoe and having an opening for the reception of said keeper on said shoe, and a key extending' longitudinally of the head through the keepers on the head and shoe for securing both the shoe and the intermediate member to the head.

p 4. In a brake shoe mechanism, a head having transverse keepers, a shoe having a transversekeeper, an intermediate member adapted to be interposed between the head and the shoe and having transverse keepers, said intermediate member also having an opening for the reception of the keeper of said shoe, and a key extending longitudinally of the head through said keepers on the shoe, intermediate member and head for securing both the shoe and the intermediate member to the head.

5. In a brake shoe mechanism, a head having` transverse keepers, a shoe having a transverse keeper, and an intermediate member adapted to be interposed between the head and the shoe and having transverse keepers and an opening for the reception of said keeper on the shoe, said intermediate member' also having openings through its body portion and keyways along one side thereof, and a key for securing said shoe and intermediate member to said head.

6. An intermediate member for brake shoe mechanisms comprising a plate having a centrally disposed opening, an opening located on either side of said centrally disposed opening, and a pair of arches constituting keyways located at either side of the central opening, said intermediate member also having keyways disposed at one side thereof.

7 An intermediate member for brake shoe mechanisms comprising a plate having a centrally disposed opening, seats disposed on either side of said centrally disposed opening and arches constituting keyWays adjacent said seats, said plate also having` an opening in its body portion at each side of said centrally disposed opening, and key- Ways adjacent each of said second-mentioned openings.

8. ln a brake shoe mechanism, a. brake head, a brake shoe, an intermediate member interposed between the head and the shoe and a T-shaped shim plate positioned between the intermediate member and the head Yfor blocking one end or' the shoe from the head.

9. ln a brake shoe mechanism, a head having a pair of keepers, a brake shoe, an in termediate member interposed between the head and the shoe and having seats adapted to engage against the keepers of said head, and a shim plate interposed between one of the keepers of the head and its corresponding seats on the intermediate member to block one end of said shoe from the head.

l0. A brake shoe mechanism comprising a head having a pair of keepers, a brake shoe havin-g a keeper adapted to be inserted between the keepers of said head, an intermediate member having an opening for the reception of said keeper on the shoe, and a key extending longitudinally of the head through the keepers on said intermediate member and shoe, said intermediate member also having flanges along either side thereof adapted to engage on the opposite sides of said head.

1l. In a brake shoe mechanism, a head having` a pair of keepers, a brake shoe having a keeper, and an intermediate member having a central opening extending through` out its width, said intermediate member also having a bridge or arch adjacent said open ing.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHARLES V. ROTE.

l/Vitnesses H. EDGAR SHERTS, NELLIE C. SHA1.

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

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