US1522249A - Brake - Google Patents

Description

A. F. KLASING Jan, 6, 192 s.

BRAKE s Sheets-Shet 1 Filed Jan. 9, 1920 Moira; 3 00%? KLASING BRAKE 3 s ts-sheet 2 Filed Jan. 9,

VII/l/I/I/IL/ Jan. 6. 1925. 1,522,249

A. F. KLASING BRAKE 2 [III t? s Z hereinafter described, for carrying out the sa e Jan. 6, 192's."

" UNITED" STATES PATENT OFFICE.

AUGUSTUS F. KLASING,.OF CHICAGO, ILLINOIS, "ASS IGNOR TO THE KLASING OAR I BRAKE COMPANY, A CORPORATION -OF COLORADO.

BRAKE.

s lpplication filed January 9, 1920. Serial No. 350,291.

To all whom it may concern:

Be itknown that I, AUGUSTUS F. KLASING, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Brakes, of which the followingis a specification.

My invention relates to railway car brakes, and particularly to manually operated brakes. Owing to the increasing weight of modern freight cars and the speed which they attain in themodern switch yards, it has becomevery diflicult with, the old form of hand brake, comprising a brake stafi around which the brake chain is wound, to apply suflicient power to the brake toretard the movement of the car or to apply such power quickly 'enoughto prevent 001- lision with other cars. Inthis type of hand brake the hand wheel secured directly to the brake stafi does not ofier sufficient leverage to apply adequate power; moreover, thelarge amount of-slack in the brake chain. makes it impossible tosetthe' brakes quickly. The object of my invention is to provide an improved brake setting mechanism, of inexpensive and durable construction, by means of which great power may be quickly applied to "the brakes.

Y A further object is to provide an improved device for winding and releasing the chain or the flexible connection in this type of brake, which is capable of exerting a powerful pull on the chain.

The invention consists in the novel ar-. rangements, constructions and devices, to be.

. above stated objects, and such other objects 2 as will appear from the following descrip-,.

- tion of certain preferred embodiments of the invention, illustrated in the accompanying drawings, wherein Fig. 1 is a perspective illustrating the application of myimproved brake to a box car;

Fig. 2 shown in the lower portion of Fig. 1, for transmitting the, pull of the brake anism to the brakes;

Fig. 3 is an elevation, taken partly in section of my improved brake mechanism;

Fig. 4 is a vertical section taken on the line H of Fig. 3;

Fig. 5 is an elevation, partly'in section,

is an elevation of the bell crankmechofc la modified form of brake mechanism; an

Fig. 6 is a vertical section thereof, takention, anda hell crank 13 for transmitting the pull on the rod 11 to the chain 14 running to the brakes. The brake setting mechanism is preferably attached to the end of the car, the power applying means 10 being placed near the top thereof, so that the brakes maybe conveniently set by. a brakeman standing on the usual step 15. It is not necessary that the brake setting mechanism extend above the roof of the dar.

It is preferably placed on the end of the car near the top. By reason of thelocation" .of the power applying means 10, it is possibleto build the car higher than those using the ordinary brake-setting means, in which the hand-wheel is above the top of the car. The -car building regulations limit the height of thecar by the height of the brake wheel above the rail, which must not exceed a certain amount. 1 g

These regulations also specify the, minimum distance between the top of the car and the hand-wheel, thuslimiting the heightof the car.

Power is applied to the brakes by winding the section of chain 12 around a' drum 16,

mounted within the housing 17, and adapted W to rotate around: the shaft 18.

' Thewinding drum 16 is made sufliciently large, so that the slack in the brake mechanisln may be removed and the brakes set by only a partial rotation'of the winding drum.

As a'result of the'elimination of'theold brake staff around which the brake chain 5 winds, a large amount of the slack in the brake mechanism is eliminated, so that the brakes may be setby winding gnly about from twelve tofifteen inches of chainaround the brake drum 16. e

Attaching lugs 19, preferably cast integral with the housing 17 are provided for at-" taching the power applying means 10 to the I j car body. Ajgear 20 rotated by the pinion 21 is adapted to wind the chain 12 on the drum. The gear is preferably cast integral with the winding drum 16, although, if desired, it .may be made separately andattached to the drum by any suitable fastening.

A handle 22 for rotating the drum 16 is operatively connected with the pinion 21 by means of a ratchet 23 and pawl 24. The ratchet-23 is formed integrally with or secured rigidly to the pinion 21. The pawl 24 is pivoted at 25 within the handle and adjacent the ratchet, the opposite end of the pawl overhanging the pivot 25 sufliciently to maintain the pawl in engagement with the ratchet for the purpose of rotating the pinion 21. The handle fits over a hub 26 on'the ratchet 23, and is operatively con nected thereto by means of the shaft or rod 27 forming the common axis of the pinion 21 and ratchet 23. For the purpose of excluding dust and other foreign substances from the pawland ratchet, the handle is provided with a housing 28 extending as completely as possible around the pawl and ratchet.

For the purpose of holding the brakes in set position and for preventing the reverse rotation of the winding drum 16 when the brakes are being set, a dog or pawl 29 is disposed within the housing 17 of the mechanism adjacent the periphery of the gear 20. The dog is mounted within the housing by means of pivot pins 30 extending from opposite sides of the dog and adapted to slide within corresponding grooves or guides 31 in the housing. This mounting permits a pivoting as well as a bodily movement of the dog. The dog is provided with means 32, comprising in the present disclosure a single tooth, for engaging the teeth of the gear 20 and preventing reverse rotation.

A weight 33 pivoted to "the housing 17 at 34 is adapted to engage the (10 29 by means of contact of the projections 35 and 36 on the weight and dog, respectively, the latter projection extending through the housing at the point 37, for pressing the dog into engagement with the teeth of the gear 20. When in the position shown in Fig. 3, weight 33 also serves by contact with the dog through the projection 38 to'hold the tooth 32 of the dog out of engagement with the teeth of the gear20, so as to permit the reverse rotation of the gear and the release of the brakes. I

In order to release the brakes and unwind the chain 12 from the drum 16, the weight 33 is first raised to the position shown in Fig. 3, in contact with the projection 38. The handle 32 is'then rotated in a direction to set the brakes, and to wind the chain 12 around the drum 16, until the pressure of the gear 20 upon the tooth 32 of the dog is relieved and the same rotates out of engage ment with the periphery of the gear. The

of the projection 20*.

the brakes a small projection 20 is provided;

on the gear 20 extending=from one ofthe sides thereof. This projection may be'a pin or merely the prolongation of one tooth of the gear beyond the face thereof. The projection 20 is adapted to engagean extension 32 extending from one side of the dog 29 toward the gear 20 so as to lie in the path On the release of the brakes when thewinding drum 16 has rotated to substantially the position as shown in Fig. 3 the projection 20 strikes the extension 32 and rotates the dog 29 so that the tooth 32 thereof engages, one of the teeth of the. gear 20. The rotation of the dog is suflicient to displace the weight 33 by means of the projection 38 from the position as shown in Fig. 3 and cause it to swing downwardly}. and engage the projection 36 by means iof the lug 35 thereon, thus again placing the dog in operative engagement with thegear 20. Inasmuch as the winding drum 16 is sufficiently large so that the brakes may be set by only a partial rotation of the winding drum, there is no possibility that the dog 29 will be disengaged from the gear by contact of the'dog with the projection 20 during the winding operation.

The tension on the rod 11 may betransmitted to the chain 14 by any suitable means. I prefer, however, to employ a special form of bell-crank 13 having a moving pivot. The bell-crank comprises an arm 42 connected with the end of the rod 11 which is forked for this purpose at the point 43 by means of a pin or bolt. The other arm 44 extends at an angle from the arm 42 and is formed with a curved surface 45 around which the chain 14, connected to the bell crank at 46 is adapted to wind, The surface 45 is preferably formed on an arc, having its center near the pivot 47 of the bellcrank. The bell-crank is provided with oppositely extending studs or pins 48 which extend from the sides of the boll-crank at dog.

the rack 53 .runs along the rack 54 so that the pivotal point 47 moves in an inclined path corresponding to the inclination of the rack 54. It will be noted that when the brakes are being set, the pivotal point 47 moves away from both the'brakes and the mechanism 10. This has a distending effect upon the connections'between the mechanism 10 and the brakes and serves to more quickly remove the slack in the brake mechanism. Accordingly, all of the slack in the brake setting mechanism and in the brakes does not have to be removed by means of the winding of the chain 12 around the drum 16.

In Figs; 5 and 6 I have shown a modilied form of mechanism for rotating the chain drum. This modification comprises a housing 55 adapted to be secured to the car body by means of attaching lugs 56. A drum 57 for winding the chain 12' is journaled within the housing on the shaft ratchet 59. A pinion 60, having a squared o enin therein is fitted over a corres ondingly squared portion 61 on the shaft 58. The shaft is formed with a hub 62 over which portion the handle 63 fits for the purpose of rotating the ratchet 69 by means of the pawl 64 pivoted to the handle at 65. A bolt 66 serves to retain the handle on the shaft and the shaft within the housing. A curved rack 67 is bolted or riveted at 68 to the outer face 69 of the housing and positioned so as to be .concentric with the pinion 60. A plurality of pinions 70 rotatably mounted at 71 on one face of the drum 57 mesh both with the rack 67 and the pinion 60. These p-inions act to transmit the rotational movement of the pinion' 60 to the drum 67 by reason of their engagement with the fixed rack 67.

One face 72 of the winding drum 57 is provided with a ratchet 73 adapted to be engaged by the dog 74 positioned within the housing adjacent the periphery of the ratchet 73. The dog 74 is mounted within the housing by means of studs or pins 75 projecting from opposite sides thereof which engage in grooves 76 formed in the sides of the small housing77.

A weight 78 pivoted to the housing 77 at the point 7 9' serves both to retain the dog in engagement with the ratchet 73 and to hold the same out of engagement with the ratchet 73 by pressing upon the projections 80 and 81, respectively, formed on the A lug 82 extending from the face 69 of the housing serves to disengage the pawl 64 from the ratchet 59 whenever the handle 63 is rotated'in a reverse direction far enough so that/the outer face 83 of the pawl engages therewith.

A projection 84 is adapted, as in the construction shown in Figs. 3 and 4, to

Formed integral with the shaft is a' reset the dog 74 in engagement with the v ratchet 73 by striking the projection 85 extending from the inner face of the dog. The engagement of the projection 84 with the projection 85 causes the member 81 of the dog to strike the weight 78 sufficiently to displace it from its position, as shown in Fig. 5, and cause it to engage the extension 80 on the ,dog and press the dog into engagement with the ratchet 73.

The brakes are sct and released by the mechanism shown in Figs. 5 and 6 in the same manner as withthe mechanism shown in Figs. 3 and 4, and accordingly a, description of the operation is not believed to be necessary. v

From the foregoing it will be evident that by means of the winding mechanism herein disclosed it is possible to firmly set the brakes by a seriesof pulls on the part of the brakeman on the operating handle, the force required being well within the strength of the brakeman.

1.. Brake setting mechanism comprising a housing adapted to be secured to a railway car, a winding drum and a gear secured thereto journaled within said housing, a pinion meshing with said gear, an

arm connected with said pinion by means 1" of a pawl and ratchet for rotating said pinion, a dog engaging said gear for preventing the reverse rotation thereof, means for ill) the brakes have been released for returning a said dog to operative position. v

2. In a railway car brake, mechanism for setting the brake comprising a housing adapted to be secured to the wall of a railway car, a winding member journaled within'said housing and having a flexible element connected thereto and to the brake mechanism, and adapted to be wound on said member, a pinion associated with said member for rotating the same, an operating handle connected with said pinion by means of a pawl and ratchet, and a stop adapted to engage said pawl for disengaging the same from said ratchet to release the brake. v

In brake setting mechanism, a flexible element connected to the brake mechanism, a housing adapted to be secured to the wall of the car, a winding drum j ournaledtherein and having the flexibleelement connected thereto, a gear and pinion associated with said. winding drum for rotating the same, a dog engaging said gear for preventing the reverse rotation thereof, means for disengaging said dog to permit the release of the brake. a member on said gear for engaging said dog to cause it to re-engage said gear after the release of the brake, an operating handle connected by means of a pawl and ratchet to said pinion for rotating said winding drum, and a stop adapted to engage said pawl 1 for disconnecting said operating handle from said pinion on the release of the brake.

4. Abrake setting mechanism comprising a frame work adapted for attachment to a railway car, a winding drum journaled on said framework, means for giving said drum an intermittent rotary motion for setting the brakes, a dog adapted by engagement with said drum to hold it against rotation in the direction for releasing the brakes, a movable weight device adapted alternately by contact with the dog on opposite sides of its pivotal axis to hold the dog normally either in or out of operative position, and means associated with said winding drum cooperating with said dog for moving the same into position for preventing movement of said drum in one direction. c

5. In apparatus for operating the brakes ot' a railway car, the combination of a winding drum, a housing in which said drum is arranged, means for imparting intermittent rotary movements to the drum, and releasable means for holding the drum against reverse rotation comprising a toothed wheel on the drum, a dog pivoted within the housing adapted to engage said toothed wheel. the extremities of which dog project out of the housing. and a weight pirotally mounted on the outside of the housing adapted to bear against either extremity of the 'dog to hold the dog either in or out of engagement with the wheel. K

6. In apparatus for operating the brakes means for holding the drum against reverse v rotation comp-rising a toothed wheel on the drum, a dog pivoted within the housing adapted to engage said toothed wheel, the extremities of which dog project out of the housing, a weight pivotally mounted on the outside of the housing adapted to bear against either extremity of the dog to hold the dog, either in or out of engagement with the wheel; and projections on said wheel and dog adapted toengage when the drum is re turned to its normal position to reset the dog and weight to their normal positions.

T. A brake set-ting mechanismwincluding in combination, a casing, a winding drum therein, a pinion connected thereto to rotate the same. a ratchet and pawl operative to rotate said pinion, a dog for holding said pinion in selected position, means exteriorily of said casing for disengaging said dog, and means on said pinion cooperating with said dog for resetting the same for holding purposes.

' AUGUSTUS F. KLASING

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