US937068A - Car-brake. - Google Patents

Description

Q."M. HOADLEY.

GAR BRAKE.

. APPLICATION FILED 00T;22, 190s.

Patented Oct. 19, 1909.`

` a SHEETS-SHEET 1.

ATTORNEY.

Gr. M. HODLEY. GAR BRAKE. j

APPLIOATION FILED ori-1x22, 1908.

. :Patented .0c'1. 19, 1909.

2 SHEETS-SHEET 2v 'BIM .4 TTORNEY.

I `struct the shoes which are interchangeable.

interposed rear shoe. @ther objects are for the attalnrnent of ad- .object the capability TED STATES' Par 'onirica SIGNMENTS, T0 HOADLEY BRAKE SHOE COMPANY, 0F SPRINGFIELD, MASSACHU- SETTS, A CORPGRATION 0F MASSACHUSETTS.

CAR-BRAKE.

Specification of Letters Patent.

`Patented (het. 119. 1909.

Application filed October 22, 1908. Serial No. 459,042.

To all 'whom it may concer/n.1' i. e

Be it known that' I, GEORGE M. HOADLEY, a citizen of the United Statesv of America, and resident of Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and 'useful Improvements in Car-Brakes, lof which the following is a full, clear, andl exact description'.l

This invention relates to improvementsI in car brake devices having for their principal of acquiring, by the employment of interchangeable brake, shoes of peculiar formations in conjunction with a suitable head or brake shoe carrying back, the complete using up. of each shoe or section in consequence of its braking action on the car 'ii/heel, so that there is no remnant to become imperative, and havingto be thrown away or scrapped to makea loss, ashas commonly heretofore been thecase, of from 30 to 60 per cent. ofthe bulk of the shoe.

Another important object is .to so conone with another, and with the carrying v 'y back, that during protracted useV the car- A wheel with which the brake. is used. will cut or wear into the rear slice section the groove or channel for the car wheelange, and. so that after the. frontshoe has been completely and absolutely worn away, the one which was formerly the-rear shoe may be carried as a working shoe at the front of 'a' newly vantages as will be hereinafter 'rendered sipl parent. l

The invention consists in the combination and arrangement of peculiarly constructed 'brake shoes or sections one' with another and with a carrying'head or back, and in the construction of the individual brake Vshoes all substantially as, hereinafter fully `described in conjunction with the accompany' ing drawings, and as set v'forth in t-he clalms.

In thedrawingsz--Figure 1 is a side'ele vation o f a carrying back, and front and rear shoes, the front onebeing Vshown as in its initial or substantially e unworn aspect; Figs. 2 and 3 are similar side elevations, the former showing the front shoe abouthalf worn away, 'and the rear. shoe as commencing" to be subjected to wear, while the-letter view? shows-the extent of wear and reduction-to;

which the rear'shoe is subjected at about the time when the front shoe is ,almost entirely worn away;.Fig. 4 is a horizontal cross section on. line 4-4, Fig. 1; Fig. 5 is a perspective view of the front and rear shoes and carrying back'in separated relations; Fig. 6

is a rear view of Fig. 1.

- In the drawings, 'A represents a head or brake shoe-carrying back. of asuitable design and capability for attachment .to Va brake beam B, and made 'with a front curved 4from end to end onan arc of a circle, having a shorter'radius than that of the truly or approximately face of the car wheel represented at C in Figs. 1 Ato 3.

The front face a of the back A is transversely inclined on a straight line at all places in its length whereby to be more forwardly prominent atits outer than its innersaid recess longitudinally tapered or having.

its opposite wals convergent from the inner toward the outer edge of theshoe. The back, moreover, has at its edge or side at which the larger end of the recess d opens, and

above and below such recess laterally pro .jecting lugs f f having apertures f2 in line with theedge of the back for the reception and engagement therein of a bar or key for the confinementv of the rear shoe D in its interlocked enga ement with the head.

The rear shoe l'which in time and after `use is interchanged and replaced by a new rear shoe, and'i's utilized as the front shoe, has its front and rear faces g and. l1, curved -from end to end on' an arc corresponding to Vthat of the' front face of the carrying back 'and which as aforesaid is generated b a shorter rad-ius than that of the thread ace of the car wheeli-n conjlmction with which forwardlfy'loeated and more .prominent thanv vthat-'pt uftion-of the face' at and toward the edge. Theshoe D is provided with a transverse dovetail and longitudinally cylindrical' tread bearing the bakeis to be used;'and this shoe D is tapered rib vz' at andy projecting rearwardly beyond its rear face for ay comparativel free fit in the aforementioned correspon ingly shaped recess l of the back; and this same shoe D has within its front face and directly ,forwardly from its rib z' a transverse doveso. that its intermediate portion constitutes t5 a stop against the lateral or transverse displaement of the shoe D relatively to the Although the dovetail and tapered rib z' is to have areasonably close tit in the groove or recess d of the back, inasmuch as these appliances are to beproduced and provided asrough castings with'no nishing or machine work, and as the engagement of the taperin rib in the tapering recess may not; always ghe relied upon forlimiting the shoe D in its proper positioning on the head, the shoe D is provided at its inner edge with one or more edgewise located and rearwardly projectinglugsy m m which overlap `and 30.edgewise engage the back and maintain the shoe against any tendency to crosswise slide farther than is proper..

E represents a front shoe which in Figs. 4 and 5 is shown as of the form in which it is to be provided for the initial use of the brake device; that is,-it is made with a curved front face n -having a curvature corresponding to that of the car wheel tread or periphery, -and originally cast with a Harige reoeivs ing groove 0, while its rear face is made tot the front lface of the rear shoe D by being 'curved from end to end on the arc of smaller radius than that of thecar wheel and is also transversely inclined from edge to` edge. This front shoe, exactly like the rear shoe has at its rear face the transversely extendeddovetailedand tapered rib 2 to engage in the correspondingly shaped recess j; and it;

moreover has the edgewise located and rear` wardly projecting lug m2, m2 to overlap and engage the side of the shoe D in the same manner' that .the lugs m of the latter shoe engage the side of the back. It is to be borne in mind, however, that the front shoe E made with the working face formation thereof described and shown at the left hand portion of Fig. 5 is only to be once furnished,

and that is at the time when the brake device" is first put into use on a car, for thereafter as the shoes become used up or worn out the replacements will be successively and always byj-shoes havingthe construction or forma tions shown for the onevD. As' a ,means for the confinement of the for 5.5 Ward shoe in s rib and groove engagement -as a stop relatively to the front shoe rib.

In the use of the brake there will be a time when the car wheel will wear through the thickness ofthe front shoe at its end portions and will commence to wear the front face of the rear shoe at its opposite end portions and firstly at the Aouter side or corner areas of such face, the partially worn -front shoe being wedge shaped from its middle toward its opposite end and also being wedge shaped from itsthicker inner to its thinner outer edges., Then after still further wear the front shoe will become completely worn away even to its rear rib, as will be the case when the tread face of the car -wheel has worked on the shoe to reduce it in a manner to carry away the boundaries of its front recess j whereupon it will have the groove, like the one 0, worn into it n'ear its inner edge and it will be wedge like from its middle toward its ends and also wedge like transversely; and it is now opportune for this so worn shoe to be replaced by a new unworn rear shoe D interlocked and confined on the back, and this much worn, formerly rear shoe is inter` locked and confined on the newly provided rear shoe and is made to serve as the front shoe, until it in turn is entirely and abso` .lutely worn out concurrently with a partial wearing out of the rear shoe, which latter is then likewise replaced.

' Inasmuch as there may be times when the relation of the shoe carrying back or head on the car may be so positioned, non-concentrically relatively to the car'wheel, that the wear omthe front shoe will be greater at one end portion of its face than at the other and this relative wear continued'4 throughout usage so that one vend would be entirely worn out toresult in the carrying away of the in terlocking rib at the rear of the front shoe before the other endwise portion of the front shoe is appreciably worn, whereby in Aconsequence the unworn or the partially worn end portion of the front shoe would becbme cut oi and separated from its rib and lost from the brake,I have provided further special and peculiar formations to insure against the above referred to possibility of loss of any part of thefull wearing capability of the shoes, viz The back of the head A at its front face at either side of and leading to its `dovetail recess d has a depression u toqac` commodate a correspondingly swelled Ioropposite sides' of presented to the tread face of .considerable time and the vergent from its thick .lower at the back of the shoe being -prominent at one mation or thickening'of'the shoe Das shown 'at -v,-this swelling or thickening being in the greatest extent at its junction with the the dovetailed rib i; and

theshoe D also hasta depression as shown at u2 adjacent and leading to its dovet-ail re' cess j for the accommodation therein of a like swelled or thickened portion (Z ofevery other `brake shce'section which is to be combined as afront shoe therewith. And thus, in case of use of two shoes having the formations last pointed out, even if the brake is the carwheel, sia-angular or in an inclined position that for instance only the upper end portion of the shoe face has any brakin bearing'for' a ront shoe finally. assumes the shape of a curved wedge conend to its sliverlikev upper end, therev will still' remain as iin-like remnants of the swelled portions v c p worn, 'suiicient metal to tie or connect the wearing Vportion of the shoe with its rear retention rib. l

Of this brake device it may be truly said that every portion ofeach and every shoe, as successively employed, will become worn away or used up, and in such usageelciently and economically fulfil its braking function atthe face of the car wheel, leaving it requisite te cast away as old junk, or scrap no partis or remnants of anyof theshoes D or of" the` shoes provided when newly using the brake having the form shown at E.

I claim 1. The combination of a brake-shoe-back, or carrying-head', having a curvedfront, and

the surface thereof inclined from one side to the other whereby to be more forwardly prominent at one side' than theother,0f a

`rear 'shoe having a correspondingly curved and transversely inclined rear face and a curved and similarly transversely inclined forward face, a front shoe having a curved wheel' engaging face and a curved and transversely incl-ined rear'face, means for detachably 'connecting the rear shoe tothe back,

'and means for detachably connecting the front shoe to the rear shoe.

2. The combination of a brake-,shoe-back, or carryingshead, lhavingv a curved front, and the surface thereof inclined from one side to 'the other whereby 'to be more. forwardly side than the other, of a rear-slice having: a correspondingly curved and" transversely inclined rear face and a curved* and similarly transversely inclined fcrward"V face,

cli'iedar face ofthe front shoe'at substani face, said rear face having 'carrying-back and the faces `the other whereby' the said brake cui-ved 'te its front, and'also open at a front shoe having acurved wheel engaging face and a curved and trans-- verselyf i'ncii'ned; rear face, the'lines transl shoe."

the rear shoe to the back, and means fordetachably connecting the front shoe to the vrear shoe.'

3. The combination of a brake-shoe-lnicl':I

on .practically similar arcs of short-er radius I -than that ofthe fa'ce of the car wheel With which the brake is to coact, a front shoe hav',- ing a curvedwheel engaging face and a rear a curvature subthat ofthe shoeof the rear shoe, mea-11s for detachably connecting. the rear stantially corresponding to shoe to the back, and means for detachably connecting the front' shoevto the rear shoe.4

4. The combination of or carrylng-head, having a curvedv front, and the surface thereof inclined from one side to to be more forwardly a brake-shoe-back, l

prominent at one side than the other, of a rear shoehaving a correspondingly'curved yandd transversely inclined forward face, the

brake shoe back and said brake shoe each having a dove-tail recess across and opening to its front, and also open at the sides, and

shoe having a transverse dovetail rib at its rear side to engage in such similarly shaped havinga curved Wheel engaging face and a and transversely inclined rea-r face, and having asimilar dove-tail transverse rib at its rear side for enga-gement in the similarly shaped recess of the fir-st named and relatively intermediate shoe, means for detachably confining the rear shoe in its engagement with the back, and means for detachably confining the front shoe in its engagement with the other shoe.

5. The combination of a brake-shoe-back, l

or carrying-head, havinga curved front, and the surface thereof inclined from one side to the other whereby to .be more forwardly prominent at one 'side than the-other, of a rear shoe having a correspondingly curved and transversely inclined forward face, the brake shoe back and said brake shoe each having a'dove-t'ail recess` across and opening the sides, andv tapered in its length, and the said brake shoe; having a transverse tapered dovetail rib at its rear side to engage in such similarly shaped' recess of said back, a front shoe having a curved wheel engaging face and 'a curved and transversely inclined rear face, andaving a similar dove-tail transverse aiid'fet'k first named and relatively intermediate slice,l means for detachably conining the rear' shoein its engagement with the back, and 'means for detachably confining the front shoe` in its engagement with the other' recess of said back, a front shoe pered .ribat its rear side for engagement in the similarly shaped recess of the'125 L vided ,at its rear with a transverse dove-tail rib to engage inthe recess of the back, and a key adapted to be engaged through the apertures of said lugs/and to engage, by an intermediate portion thereof, the end of such dove-tail rib of the shoe.

7. The combination with a brake-sliceback having a crved front and the surface thereof inclined from one side to the other whereby te be more forwardly prominent at .oneside than the other and having a transverse dove-tail recess, tapered in its length, opening to its forward face and also at its side and provided atits side adjacent and locatedrelatively to the open end of such recess with apertured lugs, of a brake-shoe having correspondingly curved and transversely inclined faces and provided at its rearwith a transverse dove-tai1 rib, tapered in its length to engage in the recess of the fio back, an a key adapted to be inserted through the apertures of said`lugs and to engage, by an intermediate portion thereof, the end of said dove-tail rib .of the shoe.

8. The combination with a brake shoe having a curved face and having cast therein a strip of non-tempered metal, a portion of which projects beyond a side of the shoe, of a companion shoe to fit and have an engagement with the first named shoe, and

lto be held in such inteilocked relation by the bending across its edge, of the projecting portion of said metallic strip.

9. The combination with a brake shoe having a curved face, a transversely extending dovetail recess opening to its front face,

and also opening to its side, and having casttherein'a strip of "non-tempered metal, between said recess and its rear face, a portion of which projects beyond a side of the shoe, of a companion shoe curved to fit the front ofthe first named shoe,'and having a dovetail rib to interlock in said recess of such shoe, and'to be held insu-ch interlocked relation by the bending across its edge of the projecting portion of said inetallic' strip. 'i

l0. The combination' with .a brakeshocback having al curved front, of a rear shoe havingcorrespondingly Acurved front and rear faces, the curvaturesithereof being of similar arcs, having a shorter radius than that of the tread face of the car wheel with hich the brake is to coact, the back and shoe having transverse dove-tail recesses opening to their front faces and also open at the sides and having depressions adjacent and leading to the margins of such recesses, and the shoe having at its rear side a transverse dove-tail rib and having its rear surface swelled or rearwardly thickened adjoining opposite portions of said ribs.

ll. rThe combination with a brake-sliceback having a curved front, of a reai' shoe and a front having correspondingly curved rear faces, and the rear shoe having a correspondingly curved front face, the curvatures being of similar arcs, having a shorter radius than that of the tread face of the car wheelwith which the brake is to coact, the back and rear shoe having transverse dovetail recesses opening to their front faces and also open at the sides and having depressions adjacent aiid leading to the margins ofsuch recesses and both shoes having at their rear sides transverse dove-tail ribs and having rear surfaces swelled or rearwardly thickened adjoining opposite portions ofl said ribs.

v12. llhe combination with a brake-shoeback having a curved front, of a rear shoe having correspondingly curved front and rear faces, the ciirvatures thereof being cf practically similar'arcs, having a shorter radius than that of the tread face of the car wheel with which the brake is to coact, and the surfaces of the back, and said shoe being transversely inclined and more prominent at one side than the other, the back and shoehaving transverse dove-tail recesses openi ing to their front faces and also sidewise open ing and having depressions adjacent and'y leading to the margins of such recesses, and i the shoe having at its rear side a transverse dove-tail rib and havinO its rear si'i'rfacel l,

swelled or rearwardly thickened adjoining opposite portions of said ribs.

13. The combination-with a brake-shoeback having a curved front and a. dove-tail recess opening to such curved front and also open atrthe sides and tapered in its length, of a shoe having curved front and rear faces, having at its rear a transverse dovetail rib tapered in its length and havin at one of its edges a lug extending beyon its rear curved face and adapted for an en- `gagement with the edge of the shoe carrying back. Y 11i. The combination with a brake-shoeback having a curved front and a doveta1l vrecess opening to such curved ,front and also open at the sides and tapered in its length, of rear and front shoes having curved front and rear faces, having on their faces transverse dove-tail ribs tapered in their lengths,

the rear' shoe having across its front a dovetail recess, tapered in its length and side- Wise opening, ands both said slices having, at their edges at one side, lugs extending bef j having its front andrear faces of aro shape.,` in their lengths, having such. front and reary l genees yond their rear curved face and adapted for engagements respectively with the edges of the shoe carrying back and of the rear slice.

\ of the back and the front and rear faces of the rear shoe being of a similar arc having a shorter radins than that of the tread face of the car wheel with which the brake is dcsigned to coact, and a front shoe for initial use, having a curved and transversely' inclined rear face,and having a front face approxin'iately corresponding' to the tread face of the car v heel in connection with which the brake to be used, ineans for detachably connecting the rear back shoe to the back, and means for detachably connecting the f front shoe to the rear shoe.-

18. A brake-shoe for interchangeable use,

' arc-shaped as'to the length `of its front and `faces transversely inclined whereby to, be

incre forwardly prominent at one side of the shoe than at the other, and having a trans versedove-tailrecess across. and opening to its front and also edgewise opening, and having a transverse dove-tail rib projecting from. its rear face 'behind said recess.

1.8. A brake-shoe for interchangeable use,

faces transversely Ainclined whereby to be` more forwardly prominent at one side of the shoe thanat the other, and having a transverse longitudinally 'tapered dove tail recess across and opening tor its longitudinally tapered front and also open at the sides, and having a transverse longitudinally tapered dovetail rib projecting from its rear 'face behind'said recess. v

19; A 'brake-shoe for interchangeable use havingits front and rear' faces curved from end to end, having across its front adove-4 tail recess, having at its rear, and directly behind such recess, a rearwardly projectingy `transverse dovetail rib, and having one or more edgewise located and'rearwardly projeeting lugs.

' 20. A brake-shoe for interchangeable use having its 'frontnd rear faces curved from end to end, having across its front a dovetail recess, having at its rear, and directly behind such recess, a rearwardly projecting transversejdovetail rib, and having cast within its thickness behind the base of its transverse .irecess a strip of bendable metal, the extremity of which projects beyond the edge of the s oe.

21. A brake-shoe for interchangeable use having Vits front' and rear faces formed with arc curvatnres from -end-to end, having a transverse recess, of dovetail shape, opening to its forward face and also edgewise opening, and said forward face having depressions atopposite sides of 'and leading to said recess, and said shoe having at its rear and surfaces of the shoe adjacent said li'lgbeing thickened or swelled.

22. A brake-shoe for interchangeable use having its front and rear faces formed with arc curvatures from'end to end, and transversely `inclined whereby to 'be -more forwardly prominent at one side of the shoe than the other, said shoehaving a transverse recess, 'of dovetail shape,'opening toits forward face and also edgewise opening, and said forward face having depressions at opposite sides of and leading to said recess, and

Y said shoe having at its rear and adjacent said recess a transverse lug, the rear surfaces of the shoe adjacent said lug being thickened or swelled.

23. A shoe for initial employment in a car brake of-the character described, having its forward face made with a curvature to conform to a substantially cylindrical tread surface of a car wheel and having along one side thereof a flange receiving groove, said shoe havin its rear surface formed with a curvatlire from end to end of' sharper pitch than its face and also transversely inclined whereby tobe niorerearwardly prominent at 'one edge portion than at its opposite portion.

Signed by me at Springfield, Mass., in Apresence of two subscribing witnesses.

- n GEORGE M. HQADLEY. Witnesses: i i

WM. S. BELLows,

G. R. .Dnisoonn adjacent'saidrecess a transversev lug, the rear

Images