US1865630A - Hand brake - Google Patents

Description

July 5, 1932. s. B. HASELTINE HAND BRAKE Filed Nov. 8, 1930 9. H A B .q y 0 n Patented July 5, 1932 UN T STATES PATENT OFFICE STACY B. HLASELTINE, OF CHICAGO, ILLINOIS, ASSIGNOR TO W. H. MINER, ING., OF CHI- CAGO,;ILLINOIS, A CORPORATION OF DELAWARE 7 HAND BRAKE.

Application filed November 8,1930. Serial No. 494,292. 7

This invention relates to improvements in hand brake mechanisms. w

This invention-is an improvement on the hand brake mechanism shown and described in co-pending application, Serial No. 472,235,

filed August 1, 1930, by Roland J. Olander.

One object of the invention is to provide in a hand brake mechanism of the rotary type including a winding member, and rotary acia tuating means therefor wherein the actuating means is operatively connected to the winding member by clutch means to transmit the power during the brake tightening operation,

simple and efficient manually actuated lever 15 means for disengaging the clutch means to release the brakes and permit free rotation of the winding element without imparting any movement to the actuating means, thereby eliminating spinning of the latter and thus in? protecting the brakeman against injury.

A more specific object of the invention is to provide in a hand brake mechanism of the character described in the preceding paragraph, a clutch actuating member compris- 1. ing manually operated, oscillatory lever mechanism supported for swinging move ment by rugged and substantial means, thereby doing away with the usual pivot pin commonly employed for. this purpose and entirely overcoming the structural and mechanical defects inherent in such pivotal connections.

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

In the drawing, forming a part of. this specification, Figure 1 is a vertical, sectional view of my improved'hand brake mechanism, the section being in a plane parallel to the end wall of the car, the mechanismbeing shown as secured to said end wall. Figure 2 is an end, elevational view of the-hand brake mechanism illustrated in Figure 1, looking from the leftin said figure, certain 5 parts beingbroken away. 7 Figure 3 is an enlarged, vertical, sectional view similar to Figure 1, illustrating a different embodiment of the invention, showing a modified form of clutch operating mechanism, the clutch op erating mechanism and necessary cooperat ure, and showing certain parts in dotted lines.

Referring first to the embodiment of the invention illustrated in Figures 1 and 2, the operating parts of my improved hand brake mechanism are shown as enclosed in a two part housing 10, comprising top and bottom sections, divided on a horizontal plane. The sections of the housing are preferably flanged at their meeting edges, the flanges being suitably secured together. g per and lower securing lugs 1111,'pr0jecting therefrom by. which the same is fixed to the end wallof the car, rivets 12%12 extending through said lugs and the end wall of the car being employed for securing the housing to said wall. V

The housing contains a chain winding drum A, a driving wormv wheel B, a sliding clutch member Grand a driving worm D,

The chain winding drum A is hollow and as clearly shown in Figure 1 is ournaled at the lefthand end in a bearing boss 13 on the housing, the boss being of two part construction, each half section thereof being formed on one of the housing parts. At the 0pposite end, the drum Ahas an enlarged,

cylindrical bearing portion 14 journaled in a bearin member 15 provided in a vertical dividing or partition wall 16 of the housing, the bearing member 15 being partly formed on each housing section so as to provide co operating half bearing members. The bearing member 15 is in the form of an annular flange projecting from the partition wall ldand is'reduced at the lefthand end, as shown in Figure 1, to provide a bearing 17 of smaller size than, the bearing member 15. The worm wheel B is provided with hub portions 1818at opposite ends ,thereof iournaled in the bearingj17 and a bearing The housing has up- 1 member 19 provided in the lefthand end wall of the housing. The bearing member 19 is also of two part construction, the parts being formed respectively on the two parts of the housing. The worm D is journaled at opposite ends in the housing and has an operating hand wheel, not shown, secured to one end thereof, the hand wheel being disposed exterior of the housing at the front thereof as is common practice. The clutch member 0 is slidable lengthwise within the worm wheel B and projects into the hollow portion of the chain winding drum A and is yieldingly held in the position shown in Figure 1, by a spring 20 disposed between the clutch and an abutment plate 21, seated in internal grooves 22-22 provided in the two part boss 13. The clutch member C has clutch projections 2323 which engage within grooves or slots provided on the interior of the chain winding drum. The opening in the worm wheel B adjacent the drum and that portion of the clutch mounted in said opening are of square cross section, so that the clutch will rotate in unison with said worm wheel but have sliding movement with respect to the same. The stem of the clutch member, which is designated by 24, is of round cross section and protrudes outwardly beyond the corresponding hub member 18 of the worm wheel B and is accommodated in a reduced portion 25 of the housm m The chain winding drum A, the worm wheel B, the clutch member 0 and the worm D, hereinbefore referred to, are similar to and operate in a similar manner to the corresponding parts of the brake mechanism shown and described in co-pending application, Serial No. 472,235 hereinbefore re ferred to, and further detailed description of these parts is, therefore, unnecessary.

The brake chain, which is indicated by 26, is connected to the brake mechanism proper or the car in the usual manner and is wound on the drumAin tightening the brakes.

The chain 26 is secured to the drum by means of a pin 27 extending through the end link of the chain and accommodated in offsets seats in the hollow portion of the drum, an opening 28 being provided in the drum, through which the pin may be inserted.

The reduced portion 25 of the housing is of the shape shown in Figure 2, comprising top and bottom sections formed integral respectively with the top and bottom parts of the housing proper. The top part of the portion 25 of the housing has spaced vertical side walls 29-29 and a top wall 30. The bottom section has spaced vertical side walls 3131 offset laterally outwardly with respectto the walls 2929 of the top section and ahorizontal bottom wall 32. The bottom wall and the outer end wall 33 of the section 25 of the housing is slotted centrally, as indicated at 34, to accommodate an actuating lever E. At opposite sides of the slot 34, the bottom wall 32 is provided with interior, horizontal rack members 3535, which are formed integral with said wall. The actuating lever E is provided with a head member 36 accommodated within the housing portion 25, said head member being forked, as clearly shown in Figure 2. At opposite sides the head member is provided with sector gear elements 3737, which are formed integral therewith, and mesh respectively with the rack members 3535 formed on the housing. On the inner sides, the members forming the forked portion of the head of the lever are provided with trunnions 3838, which engage within alined openings provided in a slide member 39 embraced between the members of the forked head. The slide member 39 is in the form of a saddle fitting a reduced portion 40 at the outer end of the stem 2st of'the clutch member Q. As will be evident, the saddle member has shouldered engagement with the clutch stem so that the same will be moved therewith both inwardly and outwardly.

In the operation of the improved actuating means for the clutch mechanism, as illustrated in Figures 1 and 2, when the brakes are being tightened, the operating lever E is in the pendant position shown in said figure and the clutch C is interlocked with the clutch means on the chain winding drum A. The clutch will be held in this position by the action of the spring 20, aided by the action of gravity on the lever E. When it is desired to release the brakes, the lever E is pulled upwardly and outwardly away from the housing, thereby causing the teeth of the sector gear members on the head of the lever E to travel inwardly on the rack members 3535 of the housing, the saddle member 39 being forced inwardly by the trunnions on the lever, through the rocking action of the latter and forcing the clutch C to the left against the resistance of the spring 20, thus disengaging the clutch teeth from the corresponding clutch elements of the drum and permitting free rotationrof the drum with respect to the clutch member and the operating means comprising the worm wheel B and the worm D. When the brakes have been fully released, and the lever E is dropped to the pendant position shown in Figure 1, the clutch will be forced to the left, as shown in said figure, by means of the expanding action of the spring 20, assisted by the downwardly swinging lever The clutch will thus be reengaged and the mechanism put in operative condition for effecting tightening of the brakes. The tightening is effected in the usual manner by rotation of the hand wheel, which actuates the worm D which in turn rotates the worm gear B, and through which the clutch C and the drum A are rotated.

Referring nextto the embodiment of the invention illustrated in Figure 3, the construction of the operating parts of the hand brake is the same as that hereinbefore described in connection with Figures 1 and 2. In the construction shown in Figure 3, the worm wheel which corresponds to the worm wheel B hereinbefore described, is indicated by B and the clutch member which cooperates therewith is indicated by C. The clutch member C cooperates with clutch means on the chain winding drum in the same manner as hereinbefore described and is provided with a substantially square section 50 on the stem thereof, which operates in a square opening in the hub of the wheel B. The stem of the clutch member C has a projecting portion 51, which is accommodated in the housing portion 52. The housing portion 52 is of similar design to the portion of the housing described in connection with Figures 1 and 2, and has a centrally disposed slot 58 in the bottom wall 7 thereof through which the actuating lever E for the clutch extends. The actuating lever E has lugs 54 at opposite sides thereof provided with gear teeth 5555 forming sector shaped gear members, which cooperate with a pair of fixed racks 56-56 provided on the bottom wall of the section 52 of the housing at opposite sides of the slot 53. At

the upper end, the lever is provided with a pair of teeth 57-57, which cooperate with the outer end portion of the stem of the clutch member G, the innermost tooth 57, engaging within a groove 58, provided in said stem, and the outer tooth engaging the outer end of the stem. As will be evident when the operating lever Eis pulled outwardly and upwardly, the stem will rock through engagement of the teeth 55 of the lugs 54 with the rack members 56, thereby causing the clutch member C" to beforced inwardly through the action of the teeth 5757. To

, effect re-engagement of the clutch member 0',

the lever E is dropped to its pendant position and the innermost tooth 57 thereof will pull the clutch stem outwardly. 7

Referring neXt to the embodiment of the invention illustrated in Figure 4, B indi cates the gear member corresponding to the gear member 13 and C indicates a clutch member corresponding to the clutch member G, hereinbefore described; The stem of the clutch member C projects into a housing section 60 accommodating the head end of an actuating lever E similar to the lever'E hereinbefore described; The {lever E has a cam head 61 at the upper end thereof, which engages the outer end of the stem of the clutch member C and has sector shaped gear members 6262 at opposite sides thereof engaging with a pair of rack members 63-63 on the bottom wall ofthehousing section 60, the

rack' members being disposed at opposite sides of a slot 64, which accommodates the lever E As will be evident, when the lever E is pulled outwardlyand lifted, the sector gear members 62 will travel inwardly on the racks 63, thereby causing the cam head 61 to force the clutch C to the right, as shown in Figure 4 and disengaging the stem from the clutch means of the chain winding drum. The brakes will thus be released. In order to re-engage the parts, the lever E is dropped to the pendant position shown in Figure 4, whereupon the spring which cooperates with the clutch member C will return the latter to its clutching position. As will be understood, the spring means employed for this purpose is identical with the spring 20 shown in Figure 1.

Referring next to the embodiment of the invention illustrated in Figures 5 and 6, B indicates a worm wheel and C a clutch member, Which are substantially the same as the corresponding elementsjB and G, hereinbefore described; The clutch member C? has the projecting stem thereof extending into a housing section 7 0 similar to the housing section 25 described in connection with Figures 1 and 2. The actuating lever for the clutch mechanism, which is indicated by E has a head member 71 at the upper end thereof, having gear teeth 72 thereon forming a sector gear meshing with teeth of a slide 7 3 in the form of a saddle having engagement within a groove 74 formed at the outer end of the clutch stem. cAt opposite sides, the head member of the lever E is provided with cylindrical trunnions 7 5-7 5, which are journaled in bearing seats 7676 provided at opposite sides of thebottom wall of the housing, the bottom wall being slotted, as indicated at 77, between said seats to accommodate the lever E As will be evident, when the lever is pulled outwardly and upwardly, the stem will swing on the trunnions 75-75, thereby rotating the head and causing the teeth of the sector shaped gear member thereof to force the slide 73 inwardly, thereby forcing the clutch C inwardlytherewith and disengaging the same from the chain winding drum in the same manner as described in connection with the device disclosed in Figures 1 and 2. As will be evident, when the lever E is dropped to the pendent position shown in Figure 5, the sector gear teeth of the head thereof will pull the slide 7 3 to the left, as viewed in said figure, thereby returning the clutch G to the clutching position. i v 7 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 appended hereto.

I'claim: V n

1. In a hand brake mechanism, the combination with a rotary brake tightening member; of rotary means for actuating said member; a manually operated rotary element sliding clutch means normally operatively connecting said element and rotary means; a fixed supporting bearing member, and a manually actuated swinging clutch operating lever for sliding said clutch member to disengage the same, said clutch lever being swingingly supported by fulcrum means formed integral therewith, said fulcrum means having bodily travelling movement on said fixed bearing member with which it is inter-engaged. Y

2. In a hand brake mechanism, the combination with a rotary brake tightening member; of rotary means for actuating said member; a manually operated rotary element; sliding clutch means normally operatively connecting said element and rotary means; a manually actuated swinging clutch operating lever for sliding said clutch member to disengage the same, said lever having a fulcrum projection thereon; and a fixed supporting member having a bearing seat in which said fulcrum projection is engaged and with respect to which said fulcrum projection has travelling movement.

3. In a hand brake mechanism, the combi nation with a rotary brake tightening mem ber; of rotary means for actuating said member; a manually operated rotary element; sliding clutch means normally operatively connecting said element and rotary means; a manually actuated swinging clutch opera ing lever for sliding said clutch member to disengage the same; and fulcrum means for said lever including a fixed supporting element and a fixed element on said lever, one of said elements having a tooth-like member projecting into a pocket on the other member and having rocking and travelling movement in said pocket.

4-. In a hand brake mechanism, the combination with a rotary brake tightening mem ber; 'of rotary means for actuating said member; a manually operated rotary element; sliding clutch means normally operatively connecting said element and rotary means; a manuallyactuated swinging clutch operating member for sliding said clutch member to disengage the same; and fulcrum means on said lever including a fixed supporting element and a fixed element on said lever, said elements having cooperating inter-engaging teeth thereon.

5. In a hand brake mechanism, the combination with a rotary brake tightening member; of rotary means for actuating said member; a manually operated rotary element; sliding clutch means normally operatively connecting said element and rotary means; a manually actuated swinging clutch operating lever for sliding said clutch mem her to disengage the same; fulcrum means for said lever including a fixed rack; and a cooperating sector gear member on said lever engaging with and supported on said rack.

6. In a hand brake mechanism, the combination with a rotary brake tightening member; of rotory means for actuating said member; a manually operated rotary element; a reciprocating clutch means for connecting said element and rotary means; and a manually actuated swinging lever having shouldered engagement with said clutch member for reciprocating the same in reverse directions to respectively engage and disengage the same, said clutch lever being swingingly supported by fulcrum means formed integral therewith, said fulcrum means having shouldered engagement with and bodily travelling movement on fixed bearing members.

7. In a hand brake mechanism, the combination with a rotary brake tightening member; of rotary means for actuating said member; a manually operated rotary element; a reciprocating clutch means for connecting said element and rotary means; a manually actuated swinging clutch operating lever having shouldered engagement with said clutch member for reciprocating the same in reverse directions to respectively engage and disengage the same; fulcrum means for said lever including sector gear means on said lever, and supporting fixed rack means with which said gear means meshes.

8. In a hand brake mechanism, the combination with a rotary brake tightening member; of rotary means for actuating said member; a manually operated rotary element; a reciprocating clutch means for connecting said element and rotary means; a manually swinging clutch lever for reciproeating said clutch member; a housing for the brake mechanism; a pair of spaced racks on said housing between which said lever swings; and fulcrum means on said lever comprising sector gears thereon at opposite sides thereof meshing with said racks.

9. In a hand brake mechanism, the combination with a rotary brake tightening member; of means for actuating said member; a manually operated rotary element; a reciprocating clutch member forming an operative connection between said element and rotary means; and a swinging operating lever for reciprocating said clutch member, said lever'having a plurality of teeth having shouldered engagement with said clutch member.

10. In a hand brake mechanism, the combination with a rotary brake tightening member; of means for actuating said member; a manually operated rotary element; a reciprocating clutch member forming an operative connection between said element and rotary means; a swinging operating lever for reciprocating said clutch member; a

slide having shouldered engagement with said clutch member, said slide having a bearing opening therein; and trunnions on said lever engaging within the bearing opening of said slide.

11. In a hand brake mechanism, the combination with a rotary brake tightening member; of means for actuating said member; a manually operated rotary element; a reciprocating clutch member forming an operative connection between said element and rotary means; a swinging operating lever for reciprocating said clutch member; a slide having shouldered engagement with said clutch member; said slide and lever having cooperating inter-engaging gear teeth thereon for reciprocating said slide.

In witness that I claim the foregoing I have hereunto subscribed my name this 6th day of November, 1930.

STACY B. HASELTINE.

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