US1657860A - Op chicago - Google Patents

Description

Jan. 31, 1928.

' L. E. LA BRIE BRAKE bmnmme MEANS Filed May 11 192 INVENTOR M065? 5105M ATTORNEY nunenn n.

Patented an. 31, 1923.

'IANY, F CHICAGO, ILLINOIS,

" was LA BRIE, or 'soU'rH BEND, rnnrane., assionon TOBEN'DIX BRAKE coin A CORPORATION OF ILLINOIS.

Applicationfilerl May 11,

d This invention relates to brakes, and is illustrated as embodied 111 an automobile ohassishaving a brake tor a front or other swivelled wheel. An object of the inven tion is to provide anefiicient but economical construction, by reducing the number of parts. T a I Having this object in view, the invention contemplates. the use of a leverarranged to apply the brake directly, instead of througha cam or the like, and which, in the case of an internal brake such as shown in the drawings, may engagethe free ends of the shoes,

or equivalent friction means, to pry them apart into engagementwith thedrum.

Animportant feature of the invention relates to the use ot'such a brake on a front,

- or other swivelled wheel, without necessitating additional complicated connections, by

- so arranging the lever that, when the brake is applied, a part engaged ,by the brake-applying means is swung from an idle position spaced tromthe-swiv-clling axis to an active posltion SllbStiLlltlflllY in that axis, so that thebrake connections do not interferewith swivelling the wheels. In one desirable arrangement, the brake-applymg means includes a second lever ifulcrumed on the axle,

.or otherwise supported independently ot'the wheel "knuckle, and engaging'the above-described part'of the lever which spreadsthe brake shoes.

- It itbe desired to relieve pressure on the outer brake, or otherwisevary the brak-- outer, brake on a turn,

ing, in rounding a corner, the point of en gagementbetween the two levers v or their.

equivalents is',in active position,not exactly inthe mathematical axis about which the wheelswivels, but slightly at one side. If

the two, rigid leversfare used, the point of engagement is sllghtly'o'utside the swivelhng axis in order to relieve the pressure on the Other objects and features of the invention, including. anovel mounting for the le--- veigand anarrange'ment permitting the use of interchangeable brake shoes, will be ap parent. from the following descript on of;

one illustrative embodiment shown 1I1'tl16 21(3-,

. *F-igurel .is vertical section elevation; V

, Figure ,2" angles to Figure; 1, through the-brake, and;

companying drawingsfln' which:

the wheel," showingthe brake shoes in side is a vertical section at right ust inside 1925. Serial No. 29,369.

usual king pin, at one end of an axle 14. The trict-iondevice carried by the knuckleiis shown asan internal expanding set of shoes, 1 including a reverse shoe 16 anchored at 18 on a backing plate 20, and a forward shoe 22 anchored at 24 and operated by circumferential movement of a servo shoe 26 against the resistance or" a spring 28. Shoes 22 and 26 are pivotallyconnected at. 30.- Anchor 18 passes through a relatively largeopening in the web of. shoe 22, and anchor 24: passes through similar large openings in armsf forining a forked end of shoe '16 straddling the anchored end of shoe 22. A spring 32 urges shoes 16 and 26 away from the drum.

7 its wheelon a knuckle 12 swivelled, by the Each of the shoes 26 and 16, adjacentits" free end, is formed withfa, slot an, through which passesa stud36 carried by the backingplate 20. Each stud 36 serves to, center a spring 38, confined-between the backing plate 20 and a washer engaging the shoe,

4L2fheld" by a cotter pin 4A and a washer engaging .theshoe. The springs serve to position ,theetree ends o t'the shoes laterally.

A lever46 is arranged to engage the free ends of the shoes or their equivalent, and is ,and a spring 40, confinedv between a: washer shown as'pivoted at 48 between flanges 50 on the end of shoe 26, and as having a point order that-shoes 16 and 26' may be identical andinterchangable,shoe16 is'also formed '1 with flanges 50. Thus rocking, the lower ofengagementbetween its ends with a wear plate52'secured to the end of shoe 16. In

end oflevertG to the right (Figure 1) will 5 tcauseit to pry the shoes apart to "force them againstt-he drunm e V 1 k e Accord ng to an important "feature ofth'e inventlon, the lever 16 has a part, -such as its lower end, which is engaged by-the brake- ,i e"

operating means, and-L which is movable in Q applyingvthe brake from an idle position spaced from the swivelling axis,lto anactive p t on ubs an i l y; thetaxis, so that n the brake does not interfere with, swivelling t-he wheel in steering.

I prefer to operate the brake by means including a lever. 5st, supported on axle l t or otherwise independent of the knuckle,

and which engages the above-described part of lever e6. ihe lever 5a is shown with a ball end, and lever -16 as having a flat surface engaged thereby, but any other suitable connection may be used.v

lVhen it is desired to vary the braking onv a turn, the point of engagement of levers and 46, or their equivalents, isnot exactly in the mathematical axis of swivelling, even when the brake is applied,i. e., in active position, but is slightly at one side of that axis. The diagram in Figure at illustrates the arrangement when the pressure on the outer brake is to be relieved on a turn. k

In this diagram, V5 is a line through the swivelling axis (i.e., the king pin axis) K 'warallel to the wheel, Wit is a corresponding line in rounding a corner to'the right, and \VL is a corresponding line in rounding a corner to the left. L indicates the lever 5a in its active position, and C indicates its point of engagement with lever to.

Now it will be evident that, when the wheel is swivelled from a position p-rallel to line V to a position parallel to'line l VR, point C tends to move to CR that'is, away from lever L, to relieve the pressure on the brake, which is on the outside of theturn. Then the wheel is swivelled to a position parallel to "NL, point C (arm 46) tends to move to CL,that is, it crowds against lever L and tightens its brake, wliich is then on the inside of the turn. Of course, the connect-ions operating levers 54: on opposite sides should be unequalized when this effect is desired.- 1

W hile one illustrative en'ibodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment, or otherwise I claim than by the terms of the appended claims.

1'. Operating means for a brake device mounted on a swivelled knuckle rotatably supporting a drum, and comprising, in' cons bination with said parts, a lever directly connected to said device and movable from I an idle position in which a partis, spaced from the swivelling axis to an active position in which thedevice is frictionally engaged with the drum and in which said part is adjacent the swivellin'g axis, and means engaging said part of the'le'ver to move the lever fromfidle to act ve position.

i 2. Operatingmeans for brake sho-es mount-' "prising,'in combinationwith said parts, :1

movable from an idle position in which a part is spaced from the swivelling axis to an active position in which the shoes are frictionally engaged with the drum and in which said part is adjacent the swivelling friction device mounted on a swivelled knuckle 'rotatabl su )ortin a drum. and

comprising, in combination with said parts,

a lever engaging the free ends of saiddevice and movable semi an idle to an active position to, spread said device against the inside of the drum, the lever having a part moving from an idle position spaced from the swivelling axis to an active position adjacent said axis, and means engaging said part of the lever to rock it to operate the friction device. 7 I

l. Operating means for an expansibl'e triction device mounted on a swivclled knuckle rotatably supporting a drum, and comprising, in con'ibination with said parts, a lever pivoted to one free end of said device and engaging the other free end and movable about its pivoted end as a fulcrum to spread said device against the inside of the drum, the lever having a part moving from an idle position spaced from the swivelling axis to an active position adjacent said axis, and means engaging said part of the lever to rock it about its p oted end to operate the friction device.

5. Operating means for spreading apart the adjacent free ends of a plurali v of frictionshoes arranged'within a drum r: atably mounted on a swivelled knuckle, and comprising, in combination with said parts, alever pivoted-to the free end of one shoe and enga 'ingthe free end ofthe other: shoe, and l 'ng'its free end movable from a position spaced from the swivelling axis to a position adjacent said axis, and means engaging said free end to rock the lever to apply the brake; I

6, Operating means for spreadin apart the adjacent free ends of a pluralit of triction shoes arrangedwithin a drum rotatai y mounted on 'a swivelled knucl zle, andco lever pivoted to the free end of one shoe and engaging the free end of the other shoe, and having its free end movable from a position spaced from the swivelling axis to a position adjacent said axis, and a second lever supported independently of the knuckle and engaging said free end to rock the first lever to apply the brake. V

7'; Operating means for spreading apart the adjacent free ends of a plurality of friction shoes arranged within a drum rotatably mounted on a knuckle swivelled on an axle, and, comprising, in COHIbination with said parts, a lever pivoted to the free end of one shoe and engaging the free end of the other shoe, and having its free end movable from a position spaced from the swivelling axis to a position adjacent said axis, and a lever pivoted on the axle and engaging said free end to rock the first lever to apply the brake.

8. Operating means for an expansible and contractable friction device engageable'with a drum rotatably mounted on a swivelled knuckle, and comprising, in combination with said parts, a lever engaging the adjacent free ends of said device and movable about its fulcrum to engage said device with the drum, the lever having one end movable from an idle position spaced from the swivelling axis to an active position adjacent that axis, and a second lever supported independently of the knuckle and engaging said end of the first lever to rock the lirst lever about its fulcrum to apply the brake.

9. A brake comprising, in combination, a drum, a plurality of shoes within the drum having adjacent free ends, and a lever pivoted to the free end of one shoe and engaging the adjacent free end of the opposite shoe to spread the shoes against the drum, the

two shoes both being formed for pivotal ends and pivoted at its extreme outer end to the outer portion of one of said ends and thence bent to clear the inner portion of said one end and engage the inner portion of the other of said ends and thence continued to form an operating portion between the friction means and the center of the drum.

11. A vehicle having, in combination, a pair of swivelled knuckles, each supporting an expansible and contractable friction device engageable with a rotatably mounted drum, a lever engaging the free ends of each friction device and operable to engage said device with its drum by movement from an idle position in which a part is spaced from the swivelling axis of its knuckle to an active position slightly at one side of said axis, and unequalized means engaging said parts of the lovers to opt-irate the brakes, the active j iositions of the points of; engagement bct'wccn said levers and means being so posik honed with respect to the swivelling axes that the braking is varied on a turn,

12. A vehicle having, in combination, a pair of swivelled knuckles, each supporting an expansible and contractable friction device engageable with a rotatably mounted drum, a level engaging the free ends of each friction device and operable to engage said device with its drum by movement from an idle position in which a part is spaced from the swivelling axis of its knuckle to an active position slightly at one side of said axis, and unequalized means engaging said parts of the levers to operate the brakes, the active positions of the points of engagement between said levers and means being so positioned with respect to the swivelling axes that the pressure on the outer brake is less.- ened on a turn.

13. A vehiclehaving, in con'ibination, a pair of swivelled knuckles, each-supporting an expansihle and contractablc friction device having adjacent free ends and engageable with a rotatably mounted drum, a lever engaging the free ends of each friction device and operable to engage said device with its drum by movement from an idle position in which a part is spaced from the swivelling axis of its knuckle to an active position in which said part is spaced slightly at one side of said axis, and unequallized brake-operating means including levers supportedindependently of the knuckles and engagin said parts of the first levers to operate them, the points of engagement between the levers in active positions being so positioned with re spect to the swivelling axes as to cause variation in the braking when the knuckles are swivelled.

14. A vehicle having, in combination, a pair of swivelled knuckles, each supporting an expansible and contractable friction device having adjacent free ends and engageable with a rotatably mounted drum, a lever engaging the free ends of each friction device and operable to engage said device with its drum by movement from an idle position in which a part is spaced from the swivelling axis of its knuckle to an active position in which said part is spaced slightly at one side of said axis, and unequalized brake-operating means including levers supported independently of the knuckles and engaging said parts of the first lovers to operate them, the points of engagement between the lovers in active position being on the outside of their respective swivelling axes.

In testimony whereof I have hereunto signed my name.

LUDGER 1* LA lfiltlllt.

Ill-3

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