USRE17015E - andres - Google Patents

Description

Reissued July 3, 1928.

UNITED STATES Re.17,o15 PATENT oFFlcE.

WILLIAM J'. ANDRES, OF SOUTH BEND, INDIANA, ASSIGNOR TO BENDIX BRAKE COI- PANY, OF CHICAGO, ILLINOIS, AA CORPORATION F ILLINOIS.

BRAKE.

Driginal lo. 1,640,589, dated August 30, 1927, Serial No. 46,041, led July 25, 1925. Application for reissue led January 18, 1928. Serial No. 247,722.

This invention relates tov brakes, and is illustrated as embodied in an automobile ates it when the drum turns in the opposite direction. Preferably the whole is arranged as a central .sh-oc with servo shoes connected at opposite ends, thus forming a convenient sub-assembly unit for independent shipment and sale.

Another very important feature of the invention relates to arranging a brake, of the type in which one part anchors when the drum is turning in one direction and a different part anchors when the drum is turning in the other direction, so that the applying means forces a portion ofthe friction means against the drum while both of said parts remain anchored, so that the friction of the drum holds the proper one of said parts against its anchorage during the final application of the brake. This avoids any disagreeable' shock due to a shifting of the aiu-horagcafter the brake is applied.

The abo've and other objects and features of the invention, including various novel combinations of parts and desirable particular constructions, will be apparent from the following description of one illustrative embodiment shown in the accompanying drawings, in which:

F iguro 1 is a. vertical section through the ln'akc just inside the wheel, showing the shoes in side elevation; and

Figure 2 is a section on the line 2--2 of Figure 1, showing one of the anchors.

In the arrangement selected for illustration, the brake includes a drum 10 and a backing plate or other support 12. Withinv arranged to tively large openings in its ends embracing the two anchors 16 and 18 carried by thev backing plate 12.

As best shown in Figure 2, each anchor has a head seated against a washer 20 engaging the side of shoe 14 and a spacer 22 is threaded or otherwise secured on the anchor. Spacer 22 rests against the backing plate 12, which has a comparatively large opening 24 through which the anchor 18 (or 16) passes, thus permitting adjustnient of the anchor. The anchor is secured 1n adjusted position by a nut 26'clamping the spacer 22 and a washer 28 against oppositesides of the backing plate. 4

At each end `of shoe 14 is arranged one of two interchangeable servo shoes 30, each of which is shown forked at its end to provide arms (Figure 2) straddling the end of shoe 14. Each pair of arms 32 is formed with comparatively large openings 342for one of the anchors. Each shoe 30 is secured to shoe 14 by a pin 36 having a head not shown) slidably engaging the backing -p ate 12, and having a smoothcylindrical shank received in alined openings in arms 32 and the web of shoe 14, the pins 36 being held in place only by the backing plate. Thus by removing the two nuts 26, and the plate 46, the three shoes may be removed as a unit, and they may also be readily disconnected from each other by removingpins 36.

Springs 38 connected to the backing plate and to opposite ends of shoe 14 urge that shoe away from the drum to an idle position determined by anchors 16 and 18. A spring or springs 40 urge shoes 30 away from the drum. e

Shoes 30 are spread apart to expand them against the drum by means shown as a double floating cam '42 of they type fully described in Patent No. 1,604,394, granted Bendix, Brake Company October 26, 1926, on application of A. Y. Dodge. Posts 44 passing through slots in the ends of shoes 30 carry a plate 46 engagin the edges of the cam wear plates 48 to .conne the ends of the shoes laterally.

When cam 42 is roekedto apply the brake, if the drum is turning in a clockwise direction, thek right-hand shoe 30 forces shoe14 against anchor 16, as permitted'by the` relatively large opening embracing anchor 18. The other shoe 30 has at this time comparatively little retarding effect, as the drum friction tends to swing it inwardly, but it 'has an important function in guarding against deformation of the drum. If the drum turns counter-clockwise, the left shoe 30 forces shoe 14 against anchor 18 in t-he same way. It will also-be noted that in applying the brake, shoes 30 both engage the drum before shoe 14 leaves either of the anchors 16 or 18. Thus the friction of the drum holds shoe 14 against anchor 16 if the drum is turning clockwise, as the shoe leaves anchor 18 during. the final application vinvention has been described in det-pil, it is` not my intention to limit its scope to that particular embodiment, or otherwise than by the terms of thel appended claims.v

1. A brake for a vehicle comprising, in combination, `a retarding device, anchoring means engaging the re'tardingI device, and a `pair of oppositely-effective servo devices, one' of which is` arranged to operate the retarding device when the vehicle is' moving for- 4ward and the other of which is arranged to `operate the retarding device when the vehicle is movingbackward. l.

2. A brake comprising, in combination, a drum, a retarding device engageable with the drum, anchoring means engaging the retarding device, and'a pair of oppositelyeffective -servo devices also engageable with said drum, one of which is arranged to operate the retarding device when the drum is turning in one direction and the other of which is arranged to operate the retarding device when the drum is turning in the opposite direction.

3. A brake comprising, in combination` a drum, a retarding device and two servo devices all engaging said dru1n, anchoring means engaging the ret-arding device, a connection operated by one servo device for applying the retarding device when the drum is turning in one direction, and a different connection operated by the other servo device to apply the retarding device when the drum is turning in the other direction.

4. A brake comprising, in combination, a drum, a retarding device engageable with the drum and anchoring at its opposite ends according to the direction of movement of the drum, and servo means pivotally connected to the retarding device and urged circumferentiallyiby the friction of the drum and arranged to force the retarding device against the drum in either direction of drum rotation.

5, A brake comprising, in combination, a drum, a retarding device engageable with the drum and anchoring at its opposite ends according to the direction of movement ofthe drum, and a pair of servo devices urged circumferentially byv the friction of the drum and so arranged that one or t-he other forces the retarding device against the drum in either direction ofdrum rotation.

6. A brake comprising, 'in combination, a drum, a friction device within the drum, means at each end of the friction 'device to take the braking torque according to the direction of drum'rotation, and servo means connected to the friction device and urged by the friction of the drum to force the friction device against the drum, the friction device and the servo means engaging successively the same Surface of the drinn.

7. A-brake comprising, in combination, a drum, afriction device within the drum, means at each end of the friction device to take the braking torque according to the direction of drum rotation, and a servo shoe at each end of said device and one or the other of'which shoes is urged by the friction of the drum to force the friction device against the drum according to the direction 'of rotation, the friction device and the servo shoes engaging successively the same surface of the drum.

8. A brake comprising, in combination, a drum, a shoev within the drum, an anchor at each end of the shoe, spring means urging the. shoe away from the drum, and servo means connected to the shoe and urged by thefriction of the `drum and overcoming the spring means to force the shoe against the drum and against one or the other of the anchors aecordingto the direction of drum rotation.

9. A brake comprising, in combination, a drum, a shoe within the drinn, an anchor at each end of the shoc, a pair of springs connected to the shoe near its ends and nrging the shoe away from the drum, and servo means connected tothe shoe and urged by the friction of the drum and overcoming the springs to force the shoe against the drum and against one or the other of the anchors according to the direction of drum rotation.

10. A brake comprising, in combination, a drum, a shoe within thedrum having an anchor at each end, a pair of shoes connected to the first shoe at its cndsand engagcable with the drum, and means for forcing the pair of shoes apart against the drum. y

11. A brake con'iprising a Heating retard-` ing device consisting of connected rigid sections, and anchoring devices arranged at opposite ends of one of said sections. one ortho other'of the anchoring devices taking the braking torque ofthe ent-ire reta-rding device.

12. A brake comprising, in combination, a drum, a fioa'ting retarding device consisting of connected rlgid sections, and anchoring devices arranged at opposite ends of an intermediate one of saidsections, one or the other of the anchoring devices taking the braking torque of the entire retarding device according to the direction of rotation of the drum.

13. A brake comprising, in combination, a drum, a. floating retarding device engageablc with the drum, and three devices spaced approximately 120 apart about the drum and including an expanding device to apply the brake, and two anchoring devices one of which takes the torque of the retarding device when the drum is turning in one direction and the other of which takes said torque when the drum is turning inthe other direction.

14. A friction device for a lbrake including a central shoe, a servo shoe connected to each end of the central shoe, and an anchor at each endl of the central shoe.

15. A friction device for a brake including a cent-ral shoe, a servo shoe connected to each end of the central shoe and forked to straddle the end of the central shoe, and an anchor at each end of the central shoe, the three shoes forming a connected sub-assembly unit.

16. A friction device for a brake comprising, in combination, a central shoe, a ser-vo shoe at each end of the central shoe and connected thereto at some distance from its end to give the effect of overlapping the shoes,

i oneof which is pivotally mounted on the4 and an anchor at each end of the central shoe passing freely through a relatively lzlirge opening in the corresponding servo s loe.

17. Ay friction device for a brake comprising, in combination, a central shoe, a servo shoe at each end of the central shoe and connected thereto at some distance from its end to give the effect of overlapping the shoes, and an anchor at each end 'of the ccn- 1 tral shoe. Y

18. A brake comprising, in combination, a i

drum, a support, a pair of connected oppositel'y'extending shoes within the drum,

other, and an anchor for theconnected end of said othe'r shoe adjustably mounted on the Y support.

'19. A brake comprising, in combination, a drum, a support, a central shoe, a pair of shoes pivoted .on the central shoe, and an chors for said central shoe vat its opposite ends which are adjustably mounted on the f support.

20. A brake comprising, in eombinatioma drum, .a friction device engageable with the drumand arranged to have one part anchor when the drum is turning in one direction and to have a different part anchor when the drum is turning in the other direction, and applying means for forcing a portion of the friction device against the drum while both of said parts remain anchored and for completing the application of the brake While the friction of the drum holds one or the other of said parts in anchored position.

21. A brake comprising, in combination, a drum, a friction device cngageable with the drum and arranged to have a partanchor at one side of the drum when the drum is turning in one direc-tion and to have a different part anchor at the other side of the drum when the drum is turning in the other direc'- tion, and applying means for forcing a portion of the friction device against the drum while `both of said parts remain anchored and for completing the application of the brake while the friction of the drum holds one or the otherof said parts in anchored position.

22. A brake' comprising, in combination. a drum, a friction device engageable With the drum and arranged to have one part anchor when the drum is turning in one direction and to have a different part anchorvvhen the drum is turning in the other direction, and

23. A brake comprising, in combination, a

pair of separated anchors, a rotatable dru1n,'

friction means engageable with thedrum and anchoring on one of said anchors when the drum is turning in one direction and on the other of said anchors When the drum is turning in the other direction, and means for forcing a portion of the friction means against the drum While the friction means remains in engagement with both of said vanchors and then completing the applicationof the brake While the friction of the drum holds the friction means against one or the other of the anchors.

24. A brake comprising, in combination. a pair of separated anchors, a; rotatable drum, friction means engageable with the `drum and anchoring on one of said anchors when the drum is turning in one directionjand on llU and on the other of said anchors when the drum is turning in the other direction, ap-

plying means for forcing the friction means p part anchor when the drum is vturning in one direction and to have a different part an- Chor when the drum is turning in the other direction; applying means for forcing the i f ricton means against the drum, `and yield- Y ing means for holding both of said, parts u arranged preliminarily anchored while a portion of thelfriction means is preliminarily forced against the drum by the applying means, whereby the friction of the drum on said portion will hold the one or the other of said parts anchored during the full application of the brake. f

27.l A brake comprising, a drum, an applying device and two anchors spaced approximately 120 apart about the drum, and friction means forced'by the applying device against the drum and anchoring'on said anchors.

28. A brake comprising, in combination, a drum, an applying device and two anchors spaced approximately 120 apart about the drum, and friction means forced by the applying device against the drum and anchoring on one of said anchors when the drum is turning in one direction and on the other of said anchors when the drum is turning in the other direction.

29. A brake comprising, in combination, a drum, a friction device adjacent-the drum having one part arranged to anchor when the drum is turning in one direction and having another part arranged to anchor when the drum4 is turning in the other di-- rection, and auxiliary friction meansv pivotally connected to said friction device and to engage the drum, during the application of the brake, while both of said parts remain anchored, and to hold one or the other of said parts anchored during-the full application of the brake.

30. A brake'comprising, in combination,

a drum, a friction device adjacent the drum having one part arranged to anchor when the drum 1s turning in one direction and having another part arran ed to anchor when the drum is turning in rthe other di-v rection, and a pair of shoes pivotally connected to said friction device and arrangedV in combination,

preliminarily to b e forced apart against the drum, during the application of the brake, while both of said parts remain anchored, and to lhold one or the other offsaid parts anchored during the full application of the brake.

31. A brake com rising, in combination, a drum, a friction evice adjacent the drum having one part arranged, to anchor when the drum is turning in one direction and having another partv arranged to anchor when the drum is turning in the other direction, yielding means holding said parts anchored, shoes connected to opposite ends of said-device,'and an applying device for forcing the shoes apart against the drum, while both f said parts are held anchored by said Y means, during the preliminary part of the brake-applying action.

32. A brake comprising, in combination, a drum, friction means including a set of pvotally connected shoes arranged to have one part anchor when the drum is turning in one direction and to have a different part anchor when the drum is turning in the other direction, and applying means for forcing at least the free ends of 'the shoes against the drum while both of said parts remain anchored,I prior to the full application of the brake.

33. A brake comprising, in combination, a drum, friction means withinthe drum having adjacent movable ends and which means is arranged to have one part anchor when the drum is turning in one direction and to against the drum while both of said parts remain anchored, tion of the brake.

prior to the full applica- 34. A brake comprising, in combination,

a drum, friction means within the drum having adjacent movable ends and which means is arranged to have one part anchor when f the drum is turning in one direction and to have a diferent'part anchor when vthe drumV is turning in the other direction, and applying means engaging said ends and arranged to force atleast said ends of the friction means against the drum whilefboth of said parts remain anchored, prior to the full application of thel brake, and which applying means is thereafter operable to forcesaid ends apart to reinforce the brake-applying action of the drum friction.

In testimony whereof,'I have hereunto signed my name.

.- WILLIAM J. ANDRES.

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