US1781805A - Brake mechanism for railway cars - Google Patents

Description

Nov. 1s, 1930. P. .l CAMP 1,781,805

BRAKE MECHANISM FOR RAILWAY GARS Filed Nov. 'T' 1925 3 SheetS-Sheet l NOV. 18, A1930. P 'B CAMP 1,781,805

y BRAKE MECHANISJ FOR RAILWAY CARS 4 Filed Nov. 7, 1925 3 Sheets-Sheet 2 Nov. 18, 1930. P. B. cAMP I 1,781,805

BRAKE MEcHANIsM Fon RAILWAY GARSV Filed Nev. '7. 1925 B ShetsA-Sheet 3 Patented Nov. 18, 1930 omitir.Eloig SrfATESQ-i PATENT oFFirc PERCY B.' CAMP,OEILTAYWOOD, ILLINOS; ASSIGNOR T0k UNIVERSAL rDRAFT GEARy f ATTACHBEENT .00., A CORPORATION OFY ILLINO'XSA .Bneirnfivincnanrsia FORRAILWAY GAR-s Application lfiled November'?, 1925.` Serial No. 67,611.

This invention relates to hand brakes and has for itsprincipalsobject to vprovide asimiple shaft winding mechanism that Will; oper-v ate eliciently in the limited space available onthe ends of bavade and mail cars in the 5 ab o a ymotormans booth of electric cars and the like places. y

A Leurther obj ect of the invention is to provide mechanism forxrotatingan upright brake 10 shaft by means of a hand lever operating through a short oscillating movement similar to that given to a pump handle.

Further objects and advantages of the invention Willberevealedjas the. disclosure proceeds and the description is read in connectionA with the accompanying` drawing illustrating the preferredV form of the invention,

and in which y F ig. 1 is .an'elevation of part ofthe end of a baggage ormail car; n

n Fig@ is an enlarged elevation of thelshaft driving mechanism with a portion of its casing broken'away;

Fig-3 is a horizontal section taken `on the line 3-3 ot Fig. 1 With the cover of the casing removed; f Y

Figse and 5 are `sectional views taken on the lines 1fand 5&5` respectively of Fig- 3 f Fig. 6Y is a perspective view of one/"Tend of the hand lever;r Y j l s, Fig. 7 is a sectional'vievi7 taken ontheline 7-7 of Fig". 4l; Y j

F igs. 89 andy 10 are views similar to Figs. 2, 6 and 4 respectively, illustrating a modification. f, ln Fig. l, 10 indicates the end cfa baggage or mail carvvhich may or mayv not 'haveja door 11-l,')ywhich the end` sill'ilmay. be reached from within the car, 13 is an up-v right brakeshait conforming'generally tothe usual '.construc'tion, suitably mounted-' on `,the car and.equipped'with a/brake chainle by which the' vpower appliedlto the shaft-is com-` municated to thevfoundation' brake gear. .15 is' a handlever, mounted, to `permit a man standing onthe end sill to easily Vgive 'it a short oscillating movementsimilarto that used in operatingua water pump. e The meehanisiniliu tratedk'jdetailin the other views represents the preferred embodiment of this invention for Aconverting the oscillating motionof lthe hand lever into rotary rmotion*` andlcommunicating itto the brake s aft and also' for permitting a convenient movementof the-handlever to effect the release ofthe brakes.

Brieliystated, the

driving mechanism con-v sists of anoverrunningclutch of the: ratchet L type and a driving element ofthe clutch-17, which, for con-'f venience, Willbe call other f element Y19 yoi link 16 connecting one en ed a ratchet lever, with a vdriving arm.18'on theV hand lever 15. The

the clutch` may consist:

ofk a ratchet wheel fixed against'rotation relative to the shattgl,y

as by, Providing the two. p;

with complementary polygonal sections, as

indicated in Fig. l3.

openings 25.'converginginvvardly and pins 26 7 securevthem in the sockets.

Withff this connection, anup and down. movementoflthe leverl will cause/the ratchet-leverto oscillate back and forth aboutthe skein 20 ontheshatt 13 and throughthe engagement withV the ratchet wheel 19 it will communicate a rotary movement to that shaft;

heteethon theratchet wheel and the lever are undercutfto insure engagementduring. the

` powerstroke and to .give the yteeth a .tendency a ,to interlock across their full-Width.

Y Reversal or umvinding of the shaftl?) is the ratchet Vwheel v19.

' controlledby apawl 27engagingteeth 28 on:

This pawl is pivot-eden ayshorft shaft 29;imounted in the, `bracket 30 in fo which` the upper end or ,the ,shaft 13A is -j our-A naledk The "weighted heel 31k 'of the pawl serves ,to keep the toe the teeth 28.

in order to release eonstantlyengaged with tilelbrakes it is-necessary tofdisenga'gegthe ratchetclutch and release the paw'l 2'?. According to this invention a simple movement of thehandrlever'issuiiicientto eff? fe'ctthis result. e

" handvlever is loV kis

(Fig. 4) and the arm 18 is journaled on the hub, but rela-tive rotation is normally restrained by a fixed stop formed by a lug 33, (Fig. 4), engaging a iiange 34 on the hand lever and a yielding stop formed by spring pressed ball carried by the hub of the arm 18 and normally seating in a hole 36 in the hub of the lever 15.

The normal movement of the hand lever in winding the shaft 13 is from approximately the position shown in Fig. 2, clockwise through a small angle and back again to that position. A stop 37 limits the motion of the arm 18 in a counter clockwise direction to the position shown in Fig. 2, but due to the con-v nection between the arm and the hand lever the latter can rotate further ina counter clockwise direction. Aln doing so a shortI arm or cam 38 (Figs. 2 and 6) on the hand lever 15 v lifts a linger 39 (Fig. 2) pivoted ony the shaft 29 and having its free end 40 located ust beneath the ratchet lever at a point between the socket 21 and its bearing on the skein 20. .An upwardly projecting lug 41 on the end of the ratchet lever comes in contactl with the casing 42 and prevents that end from rising. The upward movement of the iingerf39 under the pressure of the cam 38 will, therefore, lift the ratchet lever out of engagement with the ratchet wheel.

Further rotation of the lever in a counter clockwise direction will cause an arm 43 to lift the weighted heel 31 of the pawl 27 and swing the toe out of engagement with the teeth28; In order to facilitate this movement the face of those teeth `is cut at a slight angle to the axis of the shaft, as best illustrated in Fig. 4.

Lifting the ratchet lever away from the ratchet requires suliicientcforce to prevent it takingplace accidentally in the normaloperation of winding the shaft, and since the release of thepawl 27 requires still further downward movement, resisted first by the ball 35, resting in the hole 36, and finally by thel friction of the pawl against the teeth, there is no likelihood that the brakes will be released until it is the V.intent of the brakeman to accomplish that result.

However, incertain applications the hand lever will be exposed to accidental or careless blows that mighty effect the release of the brakes when it was desired to have them relu'g33, on thearm18, and it may extend between that 'lug andthe Bange 57,.on the opposite side of the hand lever from the flange The block is equipped with a rod 58 extending through a guide 59 on the hand lever and provided with a thumb piece 60, located 1nl convenient position adjacent to the free end of the hand lever. A spring 61 extending between the guide 59 and a stop 62 on the rod will serve to normally hold the block 55 in position tok cooperate with the flange 34 and the lug to prevent relative rotation of the hand lever 15 and the driving arm 18.

`Where springs are seriously objected to, this releasable positive stop may be replaced, by a triangular stop 63 (Fig. 8) pivoted at 64 between the web 65 of the handle 15 and a wing 66 extending inwardly from the flange 57.` The longer portion 67 of the triangular' stop will act as a weight to normally hold the edge or face l68 against the lug 33, opposite to its contact with the flange 34.

This stop may bereleased by pulling the rod 69 pivoted to the stop at 7() and extending through a guide 71 to present a thumb piece 72 in convenient relation to the free end of the hand lever 15.

This stop may also be released from the inside of the car by rotating an arm 73 fixed to a shaft 74 journaled in a hollow shaft 7 5 on which the handles 415 and 115 are secured. The outside end 76 of the shaft 7 4 is equipped with an arm 77 having a finger 7 8 adapted to strike the long portion 67 of the triangular stop and swing the face 68 away from engagement with the lug 33. Asimilar arrangement may be made to permit the sliding block 55 to be retracted from the inside of the car. The bell crank 81 will serve this purpose.

The yielding stop formed by the spring pressed ball may be used'or omitted when the stops and 63 are used.

`The casing v is in the form of a box open at the top and the front side, and equipped with a cover Y46. The bottom of the casing is` extended downwardly and formed with bearings 47. for a. shaft 48 which. has one polygonal portion 49 to receive the hub k32 of the hand lever 15 and another polygonal portion within the car to receive a second hand lever 115 to permit the device to be operated. from within the car as well as from without.

VThe bottom vof the casing is also provided with a bearing 51 for the shaft 13 and bosses 52 and 53 in which the pin 29 is mounted.

Use has been made of specific description and illustration in order to disclose the invention, but it is intended that nothing contained herein shall unnecessarily limit tho following claims, or require a construction thereofthat would permit the substance of the invention to beV used without infringement.

VIA claim as my invention:

`1. In a Vrailway hand brake of the Vtype wherein the hand power for applying the date the conventional hand lever devices,` `the" combination of an -overrunning clutch including a subsequently horizontal Ashalt element in driving relation with the -uprightbiake shaft and a horizontal ratchet lever element making driving engagement 'with kthe 'brake shaft element .vhen-moved in wherein the handA power for applying the. brakes is transnnttedy thi-uan upright brake shaft whichv is rotatably mounted in. a positionI that cannot advantageously accommodate the conventional hand lever devices, the combination of an overrunning` clutch includingy a horizontall shaft element in drivey ing relation with the upright brake shaft and a horizontal ratchet lever element inaking driving engagement with the shaft ele-- mentv when movedy in one direction and 'running` idly relative to the shaft element when moved inthe opposite direction, an upright hand lever mounted to oscillate on a horizontal axis transverse to the shaft and a link operatively connecting the hand leverand the ratchetilever element of the clutch.

3. n a railway hand ybrake of the type wherein the hand power 'for applying; the brakes is transmitted thru an upright brake shaft which is rotatably mounted in a posi-- tion that cannot advantafreously accommodate the conventional hand lever devices, the combination oi an overrunning clutch including; a horizontal vshaft element in drivino; `relation with the rotatable' shaft and a `horizontal ratchet lever element making driving` engagement with theshatt element when moved inone direction and rruining,f idly relative to the rshaft element when moved inthe oppositedirection, an upright hand.levermounted to oscillate on'a horizonV tra@ ing relation with the-upright brake shaltVv and `a horizontal ratchet lever element'inakf ing *drivingy engagement with the shaft 'element when moved `in one direction andjrune` ning idlyrelativetoy the shaft element when moved in' the opposite direction, an upright hand lever mounted to oscillateonr a hori= zontal aXis transverse to the shaft, alink havingaballs at its ends and a socket *in the hand lever receivingone of `said balls and a socket in the ratchetlever element of the clntch receiving the other of -said balls.r`

5. In a railway vhand brake of the typeV wherein thehand power Vfor applying the 'brakes is transmitted thru an upright brakeshaft `whichis rotatably Vmounted in a positionfthat cannot advantageously accommodate the conventional hand lever devices, the

combination Aof an uprightbrake shaft, a hand lever mounted for brake-operating oscillating movements about a horizontal transverse to the brake sha-iftl and a driving connection between ythe lever and shaft for rotating.v the shaft by thenoscillating movements of theleven'said connection'including an overrunning clutclnone elementl of which is horizontal and is oscillated by the lever and'ianother elementof whichfrotates with the shaft,y ratchet `means for restraining `the` shaft from unwinding and means for-disengaging thev overrunning clutch andY .thev ratchet means lto release the brakes.

6. In a railway hand-brake, the combina-y tion oan upright brake shaft, an upright hand lever mounted to oscillate about a horizontal anis transverse to the sha-tt, and a subsequentlyhorizontal driving connection be-V tween ythe lever and the shaft, including a ratchet clutch, one element of which isoscillated upon avertical axis bythe-lever and another element ofwhich rotates ina horif zontal planekwith the shaft, ratchet means for restraining the shaft-from unwinding and 'means operated by thehand leverfor' 1 successively disengaging lthe ratchet clutch and the ratchet means. Y i

7.' In al device loi the class described, the eo-mbinationy ot. a rotatably mounted shaft, a ratchet wheel fixed to rotate with the shaft, a ratchetlever mounted to rotate relativeto the shaft and to engage'thefratchet wheel, a hand lever mounted ,to'oscillate on anaxis transverse to the shaft,;an operativeconnecf tion' between the ratchet lever andthe hand lever whereby'vthe former is givenvan oscillating-incuria, a pawl "lor hold-ing'the sha-ft against unwinding, and `means if operated lby yzontal ratchet lever mountedf'vto rotate relative" tosthe shaft `and to-` engage thevratchet wheel, air upright Ahand 'A lever:l mounted? to lever, a pawl for holding the shaft against unwinding, a second arm on the handY lever', a movable member associated with the ratchet lever and said second arm for actuation by said second arm to disengage the .ratchet lever, and a third arm on the hand lever to disengage the pawl.

9. ln a. railway hand brake, the combina tion with the 'wall ofla car, of an upright brake shaft to be driven, a horizontal drive shaft extending through the wall, a crank handle for each end of the drive shaft, a driving crank armfor one of the crank handles and in operative relation with the drive shaft, and a driving connection between th-e driving crank arm and the brake shaft including' a ratchet clutch, one element of which is connected to and oscillated by the driving crank arm and the other element of which is connected to and rotates with the brake shaft. Y v

10. In a railway hand brake, the combination of an upright brake shaft, a ratchet wheel fixed to rotate Vwith the shaft, a horizontal ratchet lever mounted to rotate relativevto the shaft and to engage the ratchet wheel, an upright hand lever mounted to oscillate on a horizontal axis transverse to the shaft, an arm on the hand lever mounted to rotate relative tothe hand lever, a driving connection between the arm and the ratchet lever, a pawl for holding the shaft against unwinding, means operated by the hand lever in cooperation with the pawl for tripping the same` for releasing the shaft, and a re'- leasable stop normally preventing relative Y rotation `of the hand lever and the arm.

l1. Ina railway hand brake, the combination ofVV an upright `brake shaft, Yan upright hand lever mounted to rotate about a `horizontal axis transverse to the shaft, a horizontal driving connection between the lever and the shaft,.including an upright crank arm rotatablymounted with respectrto the hand lever, and means carried by the hand lever for engaging the crank arm to nor mally prevent relative rotation.

'12. In a railway hand brake, the combina` tion of an upright brake shaft, an upright handlever mounted to rotate about a horifzontal axis transverse to theshaft, a horizontal driving connection betweenthe lever .and the shaft, including an uprightcrank arm rotatably mounted with respect to the hand lever, a fixed stop on the handlever limc iting the' relative rotation, and a movable stop on the hand lever-cooperating with the fixed stop to prevent their relative rotation.

13. 4In a railway hand brake, the combina hand lever for engagement with the lug at one side and a movable stop on the hand lever, normally engaging the lug on the opposite side.

le. ln a device of the class described, the combination of a rotatably mounted shaft, a hand lever mounted to oscillate about an axis transverse to the shaft, an arm rotatably mounted with respect to the hand lever, a driving' connection between the arm and the shaft, means to limit the movement of the arm in one direction, a releasable stop controlling relative rotation of the arm and hand lever, a pawl adapted to prevent unwinding of the shaft, and means operated by movement of the hand lever independent of the arm for releasing the driving connection `between the arm and the shaft and disengagying said pawl.

l5. ln a device of the class described, the combination with the wall of a car, of a shaft rotatably mounted adjacent to said wall, hand levers on opposite sides of said wall mounted to oscillate about an axis transverse tothe shaft, a driving connection between said hand levers and the shaftincluding an arm rotatably mounted with respect to the hand levers, a movable stop carried by one of said hand lev rs for controlling relative rotation of the levers and the arm, and means operable at either side of said wall for releasing said stop.

le. ln a device of the class described, the cibination of a shaft mounted to rotate about an upright axis, a hand lever adapted to oscillate about an axis transverse to the shaft, a driving connection between the hand lever and the shaft including an arm adapted to oscillate with t-he hand lever, a ratchet rotatable with the shaft anda ratchet lever engaging'the ratchet and operatively connected with the arm, means operated by excess movement of the hand lever' for disengaging the ratchet lever from the ratchet, and means operated by additional movement of the hand lever for releasing the shaft and permitting it to unwind.

li'. Vl'n a railway hand brake of the type in which an upright brake shaft is rotatably mounted close te the car end and must be 0perated from a position below the top of the car end, the combination of an upright hand lever mounted for brake-operating oscillating movements about a horizontal axis transverse to the shaft anda horizontal driving connection bewteen the lever and the shaft forrotating the shaft by the oscillating movements of the lever, said connection including'an overmounted car end, a clutch adapted to rotate about an u' riOht axis and includiuaoY two elements one of which is horizontal and in driving relation to the shaft and the other of which is horizontal and makes driving engagement with the first when moved in one direction and runs idle relative to the lirst when moved in the opposite direction, an upright hand lever .for brake-operatingl oscillating y movements about a horizoiatal axis transverse liu to the shaft and a driving connection between the hand lever and the second element of the clutch for rotating the shaft by the oscillating movements of the lever.

19. In a railway hand brake of the type in which an upright brake shaft is rotatably mounted close to the car end and must be operated from a position below the top of the car end, a ratchet wheel fixed upon and to rotate witn the brake shaft, a horizontal ratchet lever mounted to rotate'relative to the shaft and to engage the ratchet wheel,'an upkof' the shaft.

20. ln a railway hand brake, the combination of an upright rotatably mounted brake shaft, a ratchet wheel fixed upon and toro- 't-ate with the shaft and having` undercut teeth, a horizontal ratchet lever fulcrumed upon the shaft and having complementary undercut teeth to engage the teeth of the ratchet wheel, an uprighthand lever-mounted to oscillate about a horizontal axis trans verse to the shaft, and a horizontal driving connection between the ratchet lever and the hand lever whereby theV latter is oscillated about the axis of the shaft when the former isl given an oscillating motion about its axis. 2l. In a railway hand brake, the combina tion with an upright brake shaft, of an oper ating hand lever mounted for up and down swinging brake operating movements upon a horizontal axis, a ratchet wheel fixed upon thel brake shaft, a substantially horizontal ratchet lever fulcrumed upon the brake shaft in cooperative relation with the ratchet wheel, and an operating connection between the hand lever and the ratchet lever.

22. In a railway hand brake, the combination with an upright brake shaft, of an operating hand lever mounted for up and down swinging brake operating movements upon a horizontal axis, a ratchet wheel fixed upon the brake shaft, a substantially horizontal ratchet lever fulcrumed upon the brake shaft s in cooperative relation with the ratchet wheel, an ogerating connection between thev lhand lever and the ratchet lever, and means actuated vby the hand lever for lifting the ratchet lever out of engagement with the ratchet wheel.

23. ln a railway hand brake, the combination with an upright brake shaft, of an oper-y ating handlever mounted for up and down swinging brake operating movements upon a L horizontal axis, a ratchet wheel fixed upon the brake shaft, a substantially horizontal ratchet lever slidably fulcrumed upon the shaft in cooperative relation with the ratchet wheel, an operating connection between the hand lever and the ratchet lever, means actuated bythe hand lever for lifting the ratchet lever out of engagement with the ratchet wheel, and a pawl in cooperative relation with the ratchet wheel to prevent reverse ro` tation thereofthe hand lever being provided with means for tripping the pawl from the ratchet wheel.

2li. ln a-railway hand brake, the combina-v tion with an upright brake shaft, ofan operating hand lever mounted for up and down swinging brake operating movements upon a horizontal axis, a ratchet wheel xed upon the brake shaftiand provided with ratchet teeth upon the topand bottom thereof, a sub stantially horizontal ratchet lever slidably fulcrumed upon the shaft and in cooperative relation with the teeth upon the top of the ratchet "wheel, an operating connection between the hand rlever and the ratchet lever, and a aawl cooperating with the ratchet teeth on the underside of .the ratchet wheel, the handlever having means for tripping the pawl.

In testimony whereof l afiix my signature.

' yPEBCY B. CAMP.

Images