US1111025A - Brake-shoe. - Google Patents

Description

H. JONES.

BRAKE SHOE.

APPLICATION FILED NOV.11, 1910- 1 ,1 1 1,025. Patented Sept. 22, 1914.

u 2 SHEETS-SHEET 1.. W

test: 22 Inventor: M f by M Atty H. JONES.

BRAKE SHOE.

APPLICATION FILED 11011.11, 1910.

Patented Sept. 22, 1914.

2 SHEETS-SHEET 2.

7 '25 Inventor: WW W Atty nnrrnn stares rairnnr environ HARRY J ONES, 9F SUFFEBN, NEW YORK, ASSIGNOE T0 EDWARD H. FALLOWS, 0F

" NEW YORK, N. Y.

BRAKE-SHOE.

Specification of Letters Patent.

Patented Sept. 22, 1914.,

Application filed November 11, 1919. Serial No. 591,849.

To all whom it may concern:

'Be it known that l, HARRY Jones, a citizen of the United States, and a resident of Suffern, in the county of Bockland and State of New York, have made and invent ed certain new and useful Improvements in Brake-Shoes, of which the following is a specification.

'My invention relates to brake shoes of the type wherein a partially worn out shoe may be readily secured to an unworn shoe and held in place until it is completely worn away, the unworn shoe, after it shall have partly worn away, being in turn securedto a new and unworn shoe and it too, completely worn away, and so on indefinitely; and the object of my invention is to provide a brake shoe of the type above referred to in which provision is made for securing the two shoes to ether at their middle aortions.

and also at both ends to thereby insure that the partially worn shoe shall be held in place until every part thereof shall have been completely worn away; to provide an improved construction of securing device; and to provide such further improvements inand relating to brake shoes of the type above specified as are illustrated in the accompanying drawing and described and claimed hereinafter.

In the drawing wherein the preferred e1nbodiment of my invention is illustrated; Figure 1 is a view partly in section and partly in side elevation showing my improved brake shoe secured in position upon a brake head, with an auxiliary shoe or slipper secured upon the brake shoe; Fig. 2 is a view showing the brake shoe in plan; Fig. 3 is a view showing a section of a portion of the shoe and slipper shown in 1 upon a vertical plane the slipper being partially worn away; Fig. 4 is a view showing a section of the shoe and slipper taken upon a transverse plane extending through the middle fastening members; Fig. r is a view showing two brake shoes in section upon a transverse plane, this view being for the purpose of illustrating the action of the car wheelupon the shoe when in use; Fig. 5 is a view showing a section taken upon a transverse plane adjacent one of the two end securing members; Fig. 6 is a fragmentary view illustrating a modified form of end fastening member, the view showing a side elevation; Fig. 7 is a view showing is a view showing the same upon a verti cal longitudinally extending plane; Fig. 13 is a view showmg another form of fastening; Fig. 1 is a view showing the same upon a transverse plane, and; Fig. 15 is a view showing two brake shoes provided with the end fastenings shown in Figs. 1 to 5, the lower shoe being shown partly worn out and secured to the face of an unworn shoe.

1n the drawings, and referring first to Figs. 1 to 5 inclusive, and 15, wherein the preferred form of my invention is illustrated, 16 is brake shoe and 17 is an auxiliary shoe or slipper having a bearing face corresponding in form with the periphery of. a car wheel, said slipper being secured to the brake shoe when it is first placed in commission and completely worn away in use and during which a bearing face corresponding in form with the face of the slipper will be formed in the brake shoe, after which each brake shoe when it is nearly worn out is placed upon an unworn shoe and forms in effect an auxiliary shoe or slipper therefor to be in turn completely worn away as in the case of the original slipper first above referred to.

The brake shoe 16 has a securing member or key lug 18 by means of which it may be secured to a brake head. 19 of standard form by means of a key 20 in the same way processes of casting in soft metal inserts in cast iron articles. The securing member or key lug is formed from a blank, doubled I than is the case where the middle portions or folded upon itselfto provide an enlarged base as SllOWn in Fig. 4, and upwardly extending shank portions in contact with one another, the upper extremities of which are spread slightly'as at 22 so that the key lug will not pull through the key 20 which is bifurcated and extends upon both sides of the shank portion as in my patent above referred to. The base portion of the securmg member is provided with a hole at 21,

and, when a worn shoe is to'be secured to anunworn shoe, the shank portion of the holdlng member of the worn shoe 1s driven through the passage 211 formed in the shoe and through the hole 21 of the key lug of the unworn shoe, as will be understood from Fig. 1, the spread end of the key lug of the worn shoe being compressed in passing through the hole, after which they expand within the enlarged base portion of the key lug of the unworn shoe.

In a brake shoe covered by my patent above referred to, while each worn shoe is in turn placed upon and secured to an untions. In using this construction it is found 7 it is completely worn out.

that the partially worn out shoe after it is secured to an unworn shoe'is frequently not worn away uniformly throughout its entire length, and that one end may be completely worn away while a considerable portion yet remains at the other end. In thus wearing away, it frequently happens that the securing means at the middle portion of the shoe is worn away while a considerable part of one or both ends of the shoe remains, and,

in the construction as shown in my patent,

the ends of the shoe being worn away being unsecured to the unworn shoe, it follows that as soon as the fastening at the middle of the shoe is worn away the end portion or portions will fall away from the unworn shoe thus wasting a considerable part of the shoe, and resulting in a less satisfactory bearing surface upon the unworn shoe than would be the case if every part of the shoe being worn away were held in place until In order, therefore, to provide a brake shoe in which every part of the partially worn out shoe is secured tothe unworn shoe until it is completely worn away, I provide means for securing the end portions as well as the middle portion of the worn shoe to the unworn shoe, so that the two shoes are secured together at three separate places so that every part of the old and par tially worn out shoe will be secured to the unworn shoe until it is completely worn away. Thus not only is waste of the old shoe avoided, but a more perfect bearing surface is formed upon the unworn shoe only of the shoes are securedtogethera 23 areholding members locatedat each 7 end of the shoe for securing the end portions of the worn and unworn shoes together, said members being, in the embodiment of my invention illustrated in Figs. 1

to 5, and 15 in the form of bars of wrought iron or mild steel bent into. the shape best 1 shown 1n Flgs. 1, 3 and 15 and secured to the along the back of the shoe and through holes 25 formed in the shoe and terminate beyond the front or bearing surface of the shoe. A hole is also provided in'theholding member 23 as shown at 26 which is filled with the metal of the shoe during the castjing operation and whereby the holding- .member is prevented from being forced through the shoe as the carwheel engages the end thereof as will appear hereinafter.

hen a partly worn out shoe is securedto an unworn shoe the holding members 23 of the unworn shoe extend through the holes of the worn shoe, aswill be understood from Fig. 15, to. therebyhold the worn shoe in place until it is completely worn away; the unworn shoe after it shall have been partially worn away being in turn secured to the surface of a new unworn shoe in't'ne same way until it too is completely worn out,

The holding member 23 overlies a'lug 27 formed upon the back of the shoe 16, and 28 are lugs upon the back of the shoe which extend transverse thereto, the ends of the brake head 19 being bifurcated and having a portion resting upon the shoe upon either side of the lug 27 and against'the lugs 28 as in .my patent above referred. Thefront of the shoe has a recess at 29shaped to correspond with the'lugs 27, 28 so that the said lugs will enter the recess referred to when a worn shoe is secured in place upon an unworn one, and the ends of the worn shoe thus re strained from transverse movement by the engagement of the lugs with the recess.

In use an auxiliary shoe or slipper 17, the surface of which is shapedto conform with the-face of the car wheel, is secured to a brake shoe 16 by means of the holding members 23' of'the shoe which extend into openings 30 formed in the auxiliary shoe. As

the slipper 17 wears away the flange of the or slipper 17 has been completely worn out,

a new and unworn shoe 16 is placed back of the worn shoe 16, as shown in Fig. 4, and

secured thereto at the middle and end porea-ch worn shoe thus becoming in effect an auxiliary shoe for a new and unworn shoe, and no slipper formed initially with a flange groove is required after the first has been worn out.

The holding action of the holding member 23 is augmented after the car wheel comes into contact with its free inner end by the formation of a bur at the end of the securing member, as shown in Figs. 3 and 15, the metal of the shoe at 26 serving to hold the free end of the securing member against the car wheel and insure the formation and n aintenance of the bur referred to.

In the form of my invention shown in Figs. 6 to 10, the holding member for the ends of the shoe is designated as 32, the same being formed from a blank so shaped as to provide projections 83 which extend into the body of the shoe and. secure the holding member in place, the member being cast into the shoe as in the other forms. The holding member before being placed in the mold is bent to provide a square head 34 and depending arms 35. In use the brake shoe will be worn away to such an extent that little more than the head portion 34 will remain, whereupon the worn shoe will be placed upon an unworn shoe and the depending arms 35 of the new shoe will be clenched about the square head 34 of the holding member of the old shoe, as will be understood from Figs. 6 and 7 ,thereby securing the partially worn out shoe to the face of an unworn shoe.

In the form of fastening member shown in Figs. 11 and 12, the fastening member 30, formed from the material and secured in place as in the other forms, is bent to provide a socket 37 with overhanging flanges 3S, and a head 39 which is within a recess 40 having inclined walls 41. The shoes are secured together by forcing the head 39 between the flanges 38, the inclined walls 41 engaging the flanges of the socket, as will be understood from Fig. 11, whereby the said flanges will be closed about the head 39.

In the form of holding member shown in Figs. 13 and 14 a tube 42 which may be a short section of gas pipe is employed. This tube is cast into the body of a shoe, and is tapered at 43 which tapering portion lies within a recess 44 largest at its bottom as shown. The slipper shown in these figures is not shown as positively locked to the shoe. However, as a shoe wears away in part and is placed upon the face of another unworn shoe, it will be seen that the lower end of the tube 42 of the unworn shoe will surround the tapered end 43 of the tube remaining on the wornshoe and, as the two are forced together; the lower end of the tube is expanded into the enlarged bottom of the recess 44, whereby a positive locking action is secured between the two shoes.

Having thus described my invention and explained the operation thereof, 1 claim and desire to secure by Letters Patent:

1. A brake shoe having a key lug located near its middle portion and projecting beyond the rear face thereof; and two holding members located one at either end of said shoe and projecting beyond the for ward face thereof.

' 2. In a device of the class described, a brake shoe comprising a single unitary structure continuous throughout its entire length; a second brake shoe comprising a single unitary structure continuous throughout its entire length resting upon said first mentioned shoe; means for securing said shoes together at their middle portions; and means independent of said first mentioned means for securing the end portions of said shoes together.

3. A brake shoe having a key lug located near its middle portion and embedded in the material of the shoe, said key lug having an enlarged base provided with an opening and said brake shoe having a passage communicating with said opening; and two holding members located one at either end of said shoe and extending from the rear face thereof through openings provided in said shoe and terminating beyond the forward face thereof.

4. In a device of the class described, a brake shoe; a second brake shoe resting upon said first mentioned shoe and secured thereto at its middle portion; and two holding members located one at either end of said first mentioned shoe and projecting beyond the forward face thereof and which holding members engage the end portions of said second shoe to thereby form additional securing means for holding said shoes together.

5. In a device of the class described, a brake shoe; a second brake shoe resting upon said first mentioned shoe and secured thereto at its middle portion; and two holding members located one at either end of said first mentioned shoe and extending from the rear face of said shoe through openings provided therein and into openings provided in said second shoe.

6. A brake shoe having a holding member secured to the rear face thereof and extending through an opening provided in said shoe and terminating beyond the forward face of said shoe.

7 A brake shoe having a holding member secured to the rear face thereof and exopening provided in said shoe and terminating beyond the forward face of said shoe, and means for preventing said holding meniber from movement longitudinally of said opening.

9. A brake shoe having a holding member one end of which is cast into the rear face of said shoe, and which holding member extends along said rear face and through an opening provided in said shoe and be yond the forward face thereof, the portion of said holding member which lies within said opening, having a hole into which the material of said shoe extends. v

10. A brake shoe comprising a body pro- 'vicled at about the middle of its length with .a key-luggand means at either end of said body for looking a partially worn shoe thereto, said means adapted to be upset by the shoe is thewearing face of said body, said means comprising bars secured to said body and adapted to extend through said partially worn shoe, the ends ofsaid bars being upset.

Signed at New York, borough of Manhattan, in the county of New Yorkand State ofNew York this 7th day Of'NOVBlYibt-H A. D. 1910. p a

' HARRY JONES.

Vitnesses: i

R. N. FLINT,

H. M. WHITE.

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

Washington, 1).0.

Images