US1925240A - Hand brake - Google Patents

Description

Sept. 5, 1933. FUCHS 1,925,240

HAND BRAKE Filed Sept. 4, 1930 Ftgz 6' 20? g 1 62222: K 5/ 47 fieruy l lclia Wil /225.5

$1 4741; M %w y w Jig Patented Sept. 5, 1933 UNITED STATES HAND BRAKE Henry Fuchs, Chicago, Ill., assignor to W. H.

Miner, Inc., Chicago, 111., a corporation of Delaware Application September 4, 1930. Serial No. 479,637

8 Claims.

This invention relates to improvements in hand brakes.

One object of the invention is to provide a hand brake mechanism of the power multiplying type, especially adapted for use in connection with railway cars, including power multiplying gear members for actuating a chain winding drum, wherein quick release of the brake mechanism is obtained with free running of the chain winding drum by separation of the cooperating gear members, means being provided for holding said drum against movement in unwinding direction during separation of the gears to prevent the danger of stripping of the gear teeth.

A further object of the invention is to provide in a mechanism of the character indicated in the preceding paragraph, means actuated by the operating means for separating the gears, which also, after the gears have been separated, throws out of operation the locking means of the drum.

Other objects of the invention will more clearly appear from the description and claims hereinafter following.

In the drawing, forming a part of this speci fication, Figure 1 is a vertical, sectional view through my improved hand brake mechanism, illustrating the same applied to the vertical end wall of a railway car. Figure 2 is a vertical, sectional view corresponding substantially to the line 2-2 of Figure 1. Figure 3 is a View similar to Figure 1 illustrating a different embodiment of the invention. Figure 4 is a front elevational view of the brake mechanism illustrated in Figure 3. And Figure 5 is a detailed, front elevational view of certain operating lever and locking mechanism illustrating a modification of the brake structure shown in Figures 3 and *1.

Referring first to the construction illustratedin Figures 1 and 2, my improved brake mechanism comprises broadly a chain winding drum A; a gear B; a pinion C; an eccentric bearing sleeve means D for supporting the operating shaft; a hand wheel E; an operating shaft F; a ratchet G; and a locking dog H.

The improved hand brake mechanism is preferably enclosed within a housing which is secured to the vertical end wall 10 of the railway car. The housing is composed of front and back sec-- tions 11 and 12 respectively, the back section being in the form of a plate member'having three securing lug members 13-43 thereon, one of said lugs being at the upper end of the plate and the remaining two projecting laterally from said plate at the lower end thereof. The housing section 11 is in the form of a cover member having a vertical front wall 14 spaced from the member 12, side walls l515 and a top curved wall 16. The housing section 11 isalso provided with three securing lugs, which are indicated by 13, and register with the lugs 13 of the rear section 12. Two sections of the housing may be secured together by any suitable means and are herein shown as-secured together by rivets 17-47 extending through the ears thereof and also through the end wall 10 of the car, thereby serving to fix the housing to said end wall.

The chain winding drum A is of substantially conical form, as most clearly shown in Figure 1. and has a chain guide flange 18 at the larger end thereof. The brake chain, which is indicated by 19, has the inner end thereof secured to the chain winding drum by a pin 20 which extends through the end link and alined openings in the flange 18 and an outstanding lug 21 on said drum. The chain 19 is connected to the brake mechanism proper in the usual manner, and the housing is open at the bottom, as shown in Figure 1, to accommodate the chain for movement. The winding drum A is rotatably supported on a cylin' drical shaft member 22 having its opposite ends secured in alined openings provided in the front and rear walls of the housing. As shown, these openings are reinforced by raised portions surrounding the same and projecting inwardly from. the walls of the housing.

The gear B is preferably formed integral with the drum and forms a part of a hub extension 23 at the larger end of the drum. Inwardly' of the gear B, between the same and the flange 18 of the drum A, the hub 23 is formed with an annular flange section which is provided with ratchet teeth, said flange forming the ratchet member G.

The pinion C, which meshes with the gear B, is fixed to the operating shaft F, which has the hand wheel E secured to the outer end thereof in a well known manner. The operating shaft F is supported in the eccentric bearing sleeve means D, which comprises a pair of separate sleeve sections 24-24 having their opposite ends journaled in alined bearing openings provided in the front and rear walls of the housing. As shown in Figure 1, the bearing opening of the front wall which receives the corresponding sleeve 24 extends entirely through said wall and is reinforced on the inner side by an annular flange surrounding said opening. The bearing opening in the rear wall is in the form of a socket provided in an inwardly projecting boss on the platelike section 12. The operating shaft, which extends through the two sleeve sections 24--24, is headed at the rear end, said head being disposed in a pocket provided in the plate 12 and the shank thereof extending through an opening concentric with the bearing opening of said plate. The two sleeve sections 24 have an operating lever member formed integral therewith, said lever being indicated by 25, and as shown in Figure 2, being forked at the inner end, as indicated at 26, said forked portion having the members thereof spanning the pinion C and formed integral with the inner ends of the two sleeve sections 24. As will be evident, when the lever 25 is oscillated, the eccentric sleeve sections 24 will be moved in unison therewith, thereby through the eccentricity of said sleeve causing the operating shaft and the pinion C to be lifted. As most clearly shown in Figure 2, the lever 25 projects outwardly of the housing and the side wall thereof is slotted, as indicated at 27, to accommodate said lever for swinging movement.

The locking dog H, which cooperates with the ratchet member G, is in the form of an elongated pivoted lever member having an operating handle at the outer end thereof. The inner end of the lever is pivoted to the side wall of the housing, as indicated at 28, Between its ends, the lever is provided with a depending tooth 29, whichcooperates with the ratchet teeth of the member G, as clearly illustrated in Figure 2. The locking dog member H has an upstanding yoke section 30 formed integral therewith, said yoke section enclosing the sleeve section 24 to the rear of the pinion C. As will be evident, when the lever 25 is pulled upwardly and the eccentric sleeves 2424 rotated, the locking dog H will also be lifted by engagement of the eccentric portion 124 of the rear sleeve 24 with the yoke thereof. The parts are preferably so proportioned that operation of the eccentric sleeves 24-24 will lift the operating shaft F to a sufficient extent to disengage the pinion C from the gear B before the locking dog H is lifted by said eccentric sleeve members to disengage the tooth thereof from the ratchet member, thereby maintaining the chain winding drum in fixed position while the gears are being separated and preventing possible stripping of the gear teeth due to relative rotation of the gears while being separated. V

In the operation of my improved hand brake mechanism, as illustrated in Figures 1 and 2, in a chain tightening operation, the hand wheel E is rotated in a clockwise direction, thereby rotating the pinion C which meshes with the gear B, driving the latter in a contra-clockwise direction and winding the chain on the drum A. During this operation, the drum will be held against backward movement by the locking dog H engaging the ratchet member G. In order to release the brakes, the operator raises the lever 25, thereby rotating the eccentric sleeves 2424 and raising the shaft F together with the pinion C, thereby disengaging the teeth of the pinion from the teeth of the gear B. As the sleeves 2424 are rotated, and after the gears have been separated, the locking dog H is lifted through the yoke member thereof, thereby releasing said dog and permitting free rotation of the chain winding drum and quick release of the brakes. In case it is found desirable to back up or ease off the brakes, the pinion C is left in engagement with the gear B and the locking dog H manually operated, lifting the same out of engagement with the ratchet member, thus permitting the opera tor to control the unwinding of the chain through the hand wheel E, which is at such a time operatively connected to the chain winding drum.

Referring next to the embodiment of the invention illustrated in Figures 3 and 4, the brake mechanism proper is mounted within a housing in all respects similar to the housing hereinbefore described and said housing is secured to the end wall of the car in a similar manner. The inner housing section is indicated by 112 and the outer cover section by 111.

The improved brake mechanism proper, as illustrated in Figures 3 and 4, comprises broadly a chain winding drum A; a gear B; a pinion C; a hand wheel E; an operating shaft F; a ratchet member G; a locking dog H; and an eccentric supporting member K for the drum.

The chain winding drum A is of substantially the same design as the drum A hereinbefore described and has the brake chain 119 secured thereto in the same manner. The drum A has the gear member B formed integral therewith, and outwardly of the gear member carries the ratchet member G, which is also integral there with. The chain winding drum A is rotatably supported on the eccentric supporting member K, which has cylindrical end portions at the front and rear thereof journaled in alined bearing openings in the front and rear walls of the housing. The cylindrical front end portion, which is indicated by 31, projects through the front wall I of the housing. The portion of the supporting member K which extends through the chain winding drum A, the gear member B and the ratchet member G, is of larger diameter than the end portions thereof and is eccentric with retherefrom. The locking dog H is pivotally supported on the front wall of the housing and has an operating handle member 33 exterior to the housing and a tooth 34 interior of the housing cooperating with the teeth of the ratchet member G to normally hold the chain winding drum '1 A against backward rotation, that is rotation in chain unwinding direction. The tripping finger or lug 32 is so located that when the supporting member K is rotated on its axis it will engage the projecting tooth portion 34 of the locking dog, thereby releasing the dog from the ratchet member G and maintaining the same in such position until the supporting member K is operated in a reverse direction. The projecting end portion 31 of the supporting member K has an operating lever 35 fixed thereto, the operating lever being weighted at the inner end, as indicated at 36. Outstanding stop lugs 3737 are provided at opposite sides of the housing which cooperate with'the lever 35 to limit its swinging movement. The operating shaft F, to which the pinion C is fixed, has its opposite ends journaled in alined openings in the front and rear walls of the housing and has the operating hand wheel E fixed to the projecting outer end thereof. The pinion C normally meshes with the gear B to effect rotation of the chain winding drum when the hand wheel D is rotated in the proper direction.

. In order to release the brakes, the operating lever 35 is swung in a contra-clockwise direction, as viewed in Figure 4, thereby imparting a like rotation to the supporting member K and moving the chain winding drum and gear B away from the pinion C, thereby disengaging the teeth of. these members so as to permit relative rotation thereof. After the gears have been disengaged, the trip finger 32 engages the locking dog H, thereby freeing the same from the ratchet member G and completely releasing the brakes by permitting free rotation of thechain Winding drum. As will be evident, the weighted portion 36 of the operating lever maintains the handle end of said lever engaged with either of the lugs In case it is found desirable to back up or ease off the brakes, the locking dog H is manually actuated while the gears are in engagement, thereby releasing the dog from the ratchet member and permitting the operator to manipulate the hand wheel E while the brakes are being released.

Referring next to the modified form of operating means illustrated in Figure 5, it is pointed out that the construction of the brake mechanism is precisely the same as that illustrated in Figures 3 and i, the operating lever, which is indicated by 40, being rotatably mounted on the projecting end portion 31 of the eccentric supporting member K. As shown in Figure 5, the projecting end portion 31 of the member K has a collar 41 fixed thereto, on which the lever is rotatably supported. The collar has an outstanding lug 42, which operates in a slot or opening 43 provided in the hub portion of the operating lever 40. As will be evident, certain amount of lost motion is thus provided between the lever 46 and the collar ll before the lug 42 will be engaged so as to rotate the supporting member K. A locking latch 44 is pivotally supported above the collar ll, and has a locking notch 45 in the lower edge thereof engaging with the lug 42 of the collar, thereby holding the collar and supporting member K- against rotation in either direction. The latch member has a projecting tail portion 46, which has an inclined bottom edge with which a pin member outstanding from the lever 40 cooperates. The pin member 4'? is so disposed that when the lever 40 is turned to the extent of the lost motion between the same and the member K, the latch will be lifted out of engagement with the lug l2, thereby permitting rotation of the member K by the lever 40. In order to guide the pin l? in its movement, the notch of the latch member has web portion at the rear thereof which forms a continuation of the lower guide edge of saidlatch member;

In releasing the brakes, the lever 40 is operated in a contra-clockwise direction, thereby disengaging the latch, as hereinbefore described, and after the lost motion has been taken up between the lever and the collar 41, rotating the member 1 in the manner hereinbefore described in connection with ures 3 and 4 to disengage the gear .8 from the pinion C and finally also unlock the locking dog H.

I have herein shown and described what I now consider the preferred manner of carrying out my invention, but the same is merely illustrative and I contemplate all changes and modifications that come within the scope of the claims ap-' pended hereto.

I claim:

1. In a hand brake mechanism, the combination with a rotatable chain winding drum; of a gear fixed to said drum; ratchet means fixed to drum; a locking dog cooperating with the ratcet means; manually controlled means for releasing said dog; a rotatable operating shaft; an eccentric bearing support for said shaf a driving pinion rotatable with said shaft and normally meshing with said gear for rotating the chain winding drum; manually actuated lever means for rotating said eccentric bearing support to displace the operating shaft and pinion with respect to the drum and disengage said pinion and gear; and operative connecting means between said eccentric bearing support and manually controlled means for actuating the latter to release said dog subsequently to the separation of said pinion and gear.

2. In a: hand brake. mechanism, the combination with a rotary operating shaft; of a pinion fixed to said shaft; a chain winding drum; a ratchet fixed to said drum; a gear rotatable with said drum and normally meshing with said pinion; rotatable eccentric supporting means for said drum; a locking dog cooperating with said ratchet for holding said drum against rotation in unwinding direction; manually controlled means for rotating said eccentric supporting means to move said gear away from said pinion and disengage the same therefrom; and means actuated by rotation of said eccentric supporting means for disengaging said dog from the ratchet member to allow free rotation of the chain winding drum to release the brakes.

3. In a hand brake mechanism, the combination. with a rotary operating shaft; of a pinion I fixed to said shaft; a rotary chain winding drum having a gear fixed thereto and normally meshing with said pinion; a releasable locking dog for holding said drum against rotation in an unwinding direction; a supporting shaft for said drum provided with an eccentric bearing portion on which the drum is rotatable; manually actuated lever means for oscillating said supporting shaft to move said gear away from said pinion to disengage the same and permit free rotation thereof; a trip finger fixed to said supporting shaft and operatively engaging said dog upon rotation of said shaft to release the dog and permit free rotation of the chain winding drum to effect release of the brakes.

4. In a hand brake mechanism, the combination with a rotary operating shaft; of a pinion fixed to said shaft; a chain winding drum; a ratchet fixed to said drum; a gear rotatable with said drum and normally meshing with said pinion; rotatable eccentric supporting means for said drum; a locking dog cooperating with said ratchet for holding said drum against rotation in unwinding direction; means for locking said eccentric supporting means against rotation; manually controlled means unlocking said locking means and rotating said eccentric supporting means to move said gear away from said pinion and disengage the same therefrom; and means actuated by rotation of said eccentric supporting means for disengaging said dog from the ratchet member to allow free rotation of the chain winding drum and release the brakes.

5. In a hand brake mechanism, the combination with a rotary operating shaft; of a pinion fixed to said shaft; a rotary chain winding drum having a gear fixed thereto and normally meshing with said pinion; a releasable locking dog for 1 holding said drum against rotation in an unwinding direction; a supporting shaft for said drum provided with an eccentric bearing portion on which the drumis rotatable; a releasable latch for locking said supporting shaft against rota-v tion; a manually actuated lever member having a lost motion connection with said supporting shaft, said lever member having means for tripping said latch during relative movement of said lever and shaft to unlock said shaft, said lever member rotating said supporting shaft after the lost motion has been taken up to move said gear away from the pinion to disengage the same and permit relative rotation thereof; and a tripping lug fixed to said supporting shaft and engaging said dog upon rotation of said shaft to release the dog and permit free rotation of the drum to efiect release of the brakes.

6. In a hand brake mechanism, the combination with a chain-winding drum; of intermeshing power-multiplying gears for rotating said drum, said gears being rotatable about parallel axes; means for holding said drum against rotation in an unwinding direction including a member rotatable with the drum and a displaceable looking member cooperating with said first named member; means for laterally separating said gears to disengage the same; means for displacing said locking member to disengage the same from the cooperating member to release said holding means; and a single operating member for actuating both of said'last named means to permit free rotation of the chain-winding drum to release the brakes.

'7. In a hand brake mechanism, the combination with a rotary chain-winding drum; of a ratchet wheel fixed to the drum; a releasable'dog for holding said drum against rotation in an unwinding direction; a gear member fixed to the drum and rotatable therewith; an operating pinion meshing with said gear, said pinion and gear being rotatable about parallel axes; manually controlled means for laterally separating said pinion and gear; and means actuated by the operation of said manually controlled means in separating the pinion and gear for freeing said dog from the ratchet wheel to permit free rotation of the chain-winding drum and release of the brakes.

8. In a hand brake mechanism, the combination with a rotary chain-winding drum; of intermeshing power-multiplying gears for rotating said drum to wind the chain thereon, said gears being rotatable about parallel axes; a ratchet Wheel rotatable with the drum about an axis parallel to the axes of rotation of said gears; releasable means for holding said ratchet Wheel against rotation in chain-unwinding direction; manually controlled means for disengaging said gears by lateral separation thereof to permit relative rotation of the same; and means actuated by said manually controlled means for laterally withdrawing said holding means from the ratchet Wheel subsequent to disengagement of said gears to permit free rotation of the chain-winding drum and release of the brakes.

HENRY FUCHS.

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