US1780030A - Brake-beam fourth-point support and safety device for clasp brakes - Google Patents

Description

5 Oct. 28, 1930. L. s. MILLER 1,

BRAKE BEAM FOURTH POINT SUPPORT AND SAFETY DEVICE FOR CLA SP BRAKES 2 Sheets-Sheet Filed May 4, 1927 0a. 28, 1930. L, G MILLER 1780,03)

BRAKE BEAM FOURTH POINT SUPPORT AND SAFETY DEVICE FOR CLASP BRAKES Filed May 4, 1927 2 sheets-sheet 2 INVENTOR Law 6. fllillzlr- TTORN Patented Oct. 28, 1930 LOUIS e. MILLER; or nnTnnnnnizr;rinnvsYnvmvm, nssreivon 5'10 BETHLEHEM STEEL conr mr' I .i

' ismxn nnm ronnTn-rom'r SUPPORT AND SAFETY nnvronron otnsnnnsicrss tsunami-Ileana, 1927.; Serial No.,;1 88,647V 1 My invention relates to brake mechanism for car trucks and more particularly to trucks of the four wheel type, on which clasp-brakes are used, wherein the brakes are forced upon 5 oppositesides of thetread of each of its four wheels simultaneously;

One of the objects of my invention relates more especially to trussed break-beams and four point suspension for supporting the mbrake-beams at, their intermediate points.

The features constituting the four pointsus pension consists, in addition to the customary. link or hangers, not shown, WlllCll are connect ed to brake-beam heads and attached to the 5 truck side frames in the usual well known manner, of two pairs of track-bars, each pair having their ends secured to the spring plank and extending outwardly therefrom under theaxles and supported at the outer ends by brackets secured to the. ends of the truck frame. Each pair of track-bars have ways j thereon to engage two brake-beams at opposite sides of the struts or brake lever postsand these waysare formed at suitable angles to. receive, support and guide the truss-rods of thebeams at their end portions, during the movement of the brake-beams so as to assure a correct positioning of the brake-beams and maintain a concentric relationof the work, ing faces of the brake-shoes to the treadof the car wheels, both in the service application of said shoes to the wheels and theirrelease therefrom under all'conditions as to thewear of either the shoes or wheels or both thereof.

and supporting the truss-rods of the brakebeams at their intermediate'points, said chairs vention Another object of my invention .consistsin', securing the track-bars to the spring-plank in such a manner that they will .be held se-" curely in their operative position, but can be easily removed or replaced on thetruckatofa cilitate the more easy removal and replace" ment of the brack-beams without the reJ moval of rivets, bolts, cotter-pinsor the like,

. A further object of my invention resides in.

securing chairs to the track-:barson the ways] on each side of both of theaxles for receiving.

' beams.v The chairs are slidably mounted on the slide-ways,but are eachpermanentlyse- 100' being free to slide onthe waysof the trackbar members but permanently secured therereference indicate like parts:'

Fig. 1 is a top plan viewillustrating my improved four point suspension in full lines asap plied to'a clasp-brake rigging, and showing enough of the adjacent portions of'the truck to illustrate the application of my'in- Fig. 2 is a sectional elevation taken on the line IIH of F 1; showingparts'jof' the track-bars broken away to more clearly illus- "trate the construction; I

Fig. 3 is av sectional detaiLtaken on the 7 line IIIIII of Fig. 2 showing more clearly the manner of securing the end of one of the track-bars to the spring-plank; Fig. i is a transverse section of one of the chairs. illustrating the manner of secur ing the chairs on the track-bars and,

Fig. '5 is a detail of one of the brackets which are secured to thefends'of thetruck frames forsupporting the outer. ends of the track-bars. I p I Referring now to'the charactersof refer- -'ence,,o the numeral 10 indicates the springplank, 11 the brake-beams, each comprising a truss-rod or tension member 12, compression member 13, and strut 14, each adapted to take the usual brake-lever, not shown. These brake-beams are disposed as is the usual case when clasp-brakes are. used on each side of "the, tread of thewheel normally slightly below the central horizontal line of the axles as will be clearly understood by referring j to Figs. 1 and 2 of the drawings. 1 y

Each pair of brake-beamsis supported on each side ofthe struts by means of track-bars 15, formed withinclined slide-wayslG, slotted as at 17 toreceivethe lugs 18 offchairs 19, having sockets formed therein as at '20 for engaging the truss-rods 12 of the brake cured to the track-bars 15 by means of a rivet 21 which passes through the lugs and is secured thereto. The inner ends 22 of the track-bars 15 are removably sup orted by keepers 23 which are secured to the springplank 10, bymeans of rivets 24, while the opposite ends of the track-bars are supported by means of brackets 25, attached to the end frames 2.6 Of the truck by means of rivets 27. In order to hold the track-bars in their normal position and revent longitudinal movement,-each trackar is offset near its inner and outer ends as at 28 and 29 respectively. The track-bars 15 are also held in position by the weight of the brake-beams which prevents normally any vertical movement of the track-bars at their outer ends which are supported by the brackets 25.

In operation the brake-beam tension membets rest in the sockets on the sliding chairs which can move freely longitudinally on the slide-wa s. These chairs sliding on the in clined slide-ways maintain the brake-shoes in a concentric position with relation to the tread of the wheels at all times. In case of failure of brake-beams or hangers the trackbars prevent the beams from falling on the it is desired to remove the brake-bea1ns, one or both of the brake-beams can be removed'after hangers and other attachments are disconnected by raising the ends of trackbars which rest on the brackets 25 above the upwardly extending projection 30 of the brackets and moving them over sidewise until the track-bars are free of the brackets.

They can then be lowered to disenga e the' brake beams and are then moved longitudinally" chairs from the truss-rods of the until they are free from the keepers, after which they can be lowered permitting the tached from the truck frame without removlike.

ing bolts, rivets, pins or cotter-pins or the Although I have shown and described my invention in considerable detail, I do not wish to be limited to the exact and specific details shown and described, but may use such substitutions, modifications or equivalents thereof as are embraced within the scope of my invention or as pointed out in the claims.

Having thus described my invention what I claim and desire to secure by Letters Patent is: p

1. In a fourth point support for claspbrakes, "comprising a centrally mounted spring-plank and end frames, track-bars having their ends supported by the springplank and end frames oppositely down wardly inclined slotted slide-ways formed on the track-bars, a chair slidably mounted on each slide-way adapted to support the brakebeams at intermediate points, a lug formed integral with the chair extending through the slots in the track-bar, and a rivet extending through the lug formed on the chair for securing the chair permanently to the track-bars.

2. In a fourth point support for claspbrake-beams, comprising a truck frame having a centrally disposed spring-plank and endframes, ,a pair of track-bars mounted on each side of the spring-plank and removably secured to thespring-plank and end frames, each of said track-bars having an arc-shaped central portion adapted to extend under the car axles, slotted slide-way portions extending downwardly from each central areshaped portion of the track-bars, chairs movably mounted on the slide-way for supportin the brake-beams, lugs formed integral with the chairsextending through the slots in the slide-ways, rivets extending through the lugs for permanently securing the movable chairs to t the track-bars to prevent longitudinal movement of the track-bars.

3. In a fourth point support for brakebeams, comprising a track-bar secured to the truck frame having a central arc-shaped portion with downwardly extending slotted slide-ways formed on each side of the said central'portion, chairs mova'oly mounted on the slotted slide-ways, and abutments formed 'on the track-bars to prevent longitudinal pp movements of the track-bars.

4. In a fourth point support for brakebeams secured to the truck frame, comprising track-bars each having a central arc-shaped portion adapted to extend under the axle of the car truck, downwardly extending slotted slide-ways formed on each side of the arcshaped' central portion, movable chairs permanently secured to the slotted slide-way portions of the track-bars, and abutmcnts formed near each end'of the track-bars to normall prevent longitudinal movement of V the trac -bars.

- 5. In a fourth point support for brakebeams, comprising a plurality of track-bars arranged in pairs on each side of a centrally located spring-plank and supported by the spring-plank and the end frames of the truck, said track-bars each having a central areshaped ortion adapted to extend under the' axles o the car truck, downwardly extending slotted slide-ways formed on each side of the arc-shaped central portion, movable chairs permanently secured to the slotted slide-way portions of the track-bars, and abutments formed near each end of the trackgar bars to normally prevent longitudinal 1novetion; i

7. In a fourth point support for brakebeams, comprising a truck-frame having end frames and a centrally mounted spring plank, track-bars each having a' central portion with downwardly inclined slide-ways,

, said track-bars having their inner ends slidably secured to the spring-plank and their outer ends seated in brackets secured to the end frames, and trussed brake-beams having brake-shoes for engaging the opposite sides of the tread of the wheels, and adapted to be supported at an intermediate point on the slide-Waysand retain the track-bars in position. a

8. Ina fourth point support for brakebeams, comprising a truck-frame having. end

frames and a centrally mounted spring plank, track-bars each having a central portion with downwardly inclined slide-ways, movable chairs permanently attached to the slide-ways, said track-bars having their inner ends slidab ly secured to the spring-plank and their outer ends seated in brackets attached to the end frames, trussed brake-beams having brake-shoes for engaging the opposite sides of the tread of the wheels and adapted to be supported at an intermediate point by the chairsmounted on the slide-ways, and means unattached thereto for holding the track-bars inposition.

9.'In a fourth point support for brakebeams, comprising a truck-frame having end frames and a centrally mounted springplank, track-bars each having a plurality of,

slide-ways formed thereon extending between the spring-plank and end frames, means on the spring-plank and end frames for holding the opposite ends of the track-bars unattached thereto, and brake-beams supported at an intermediate point on the slide-ways of the track-bars for retaining the track-bars in position. I

10. In a fourth point support for brakebeams, comprising atruck frame having a spring plank and end frames, track-bars each havlng an arc-shaped central portion with downwardly inclined slotted slide-ways and straight horizontally disposed ends removably supported on the spring-plank and end frames, an offset formed in the track-bars between each of the inclined slide-ways and the straight end portions, chairs movably mounted on theslide-Ways and permanently secured thereto, and .trussed brake-beams mounted upon the track-bars and supported at their intermediate points by the chairs.

11. In a fourth point support for brakebeams, comprising a truck frame provided with a spring-plank and end frames, trackbars, means unattached to the track-bars for removably securing the opposite ends of the track-bars to the spring-plank and end frames, each of said track-bars having an arc-shaped central portion and downwardly inclined slide-way intermediate portions, a chair permanently secured to each ofthe slidevway portions, and brake-beams supported at their intermediate points bythe chairs.

12. 111 a fourth point support for brakebeams, comprising a truck frame having end frames and a centrally disposed spring-plank, a pair of unattached track-bars mounted on each side'of the spring-plank and removably secured to the spring-plank and end frames, each of said track-bars having a central areshaped portion adapted to extend underthe car axle, slide-way portions extending downwardly from the central arc-shaped portion of the track-bars, a chair permanently secured to and slidably mounted on each of the slide-ways, and brake-beams supported at'intermediate points by the chairs.

13. In a fourth point support for brake- I beams, comprising a truck-frame having end frames and a centrally disposed spring-plank, a pair of unattached track-bars slidably mounted on each side of the spring-plank and removably secured to the spring-plank and end frames, each of said track-bars having a central arc-shaped portion adapted to extend under the car axle and having slotted slide-way portions extending downwardly from each central portion of the track-bars, 7 chairs movably mounted on the slide-ways,

lugs formed integral with the chairs adapted to extend through the slots formed in the slide-way portions, means attached to, the

lugs for permanently securing the movabble chairs to the track-bars, and brake-beams sup-' ported at intermediate points by the chairs.

1 In a fourth point support for brakebeams, comprising a truck-frame having end frames and a centrally disposed spring-plank,

a pair of unattached track-bars secured to the truck-frame each having a central arc-shaped "portion with downwardly extending slotted slide-ways formed on each side of the said central portion, chairs movably mounted on the slotted slide-ways, offsets formed onthe track-bars to prevent longitudinal movement of the track-bars, and brake-beams supported at intermediate points by the chairs and adapted by their weight to normally prevent vertical movement of the track-bars.

In testimony whereof I hereunto affix my signature.

LOUIS e. MILLER.

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