US829489A - Vehicle-brake. - Google Patents

Description

PATENTED AUG. 28, 1906.

H. R. SCOTT.

VEHICLE BRAKE APPLIIOATIOK nun sum. 2a. 1905.

' mg mechanism embodyin v No. 829,489.

nsrrnn STATES it HAYWARD ROTHEM SCOTT, OF

PALIENT OFFICE.

CH RISTIN E, CALIFORNIA.

VEHICLE-BRAKE- Specification of Letters Patent. Application filed September 23,

Patented Aug. 28, 1906. 0 -Serial1l'o-2'79,86'l:

of which the following is a specification. I

his invention relates to vehicle-brakes,

and has for its objects to produce a comparatively simple inexpensive device of this character which may be readily installed, one whereby the wheel may be quickly and securely locked against movement, and one wherein the wheel will be relieved of wear usually attendant upon the operation of brake-shoes.

With these and other objects in view the invention comprises the novel features of construction and combination of parts more fully hereinafter described.

.In the accompanying drawings, Figure 1 is a central transverse sectionthrough a brakshowing the same a plied or use. Fig. 2 is a section taken on tlEe line 2 2 of Fig. 1 and looking in the direction of the arrow.

eferring vehicle-axle provided with a spind e2, on which is arranged for rotation a wheel comprisinga hub 3 and spokes 4, these arts, which are foreign to my invention, being of the usual or an preferred construction and material and a pted in practice to perform their ordinary functions.

Fixed upon the axle 1 at the inner end of the spindle 2 is a hollow shell or casing 5, p senting an annular-ed ed flange orgvall 6 and an inner flan e or wall 7, which encircles the T spindle 2, 'sai casing being preferably formed noted in this in a pair of sections connected together and onto the axle 1 by means of bolts 8, entered throughflanges 9, provided on that part of the flange or sleeve 7 which projects in rear of the casing '5. 45 I cured to the wheel Fixed on the ihnerend of hub Sandeeby means of bolts 10, entered through the pokes 4, is a hollow shell 11, presenting an annular marginal flan e 1 2, which when the arts are assemble surrounds fiange G an constitutes a brake band eing of slightly greater diameter than that of casing 5 whereby the surface or band'12is -s ace from-the wall as seenin Fi 2, it ein connectionthat t e shell 11'is Provided for moving 'oted, respectively,

of easing the invention and to the drawings, 1 desi nates a stand normallyretracted b motion or the sto movable with the wheel, while the casing 5. is stationary. 4

Arranged for movement the casing is a plurality, preferably four, of braking members or shoes 13, adapted to project through suitable o enings 14, formed in the flange 6, and to e guided in their movements by webs or flanges 15, formed in the casing 5, these webs being arranged in pairs and parallel with the of the casin and radially of eacli of the shoes 13 1s a pair of toggle members or links 16, ivto the member 13 an inher flange 7. and in turn having their meeti ends pivotally connected. at 17, there bei'n engaged with each of'the to gles 16 and at the pivotal joint 17 a longitugnally-movable connectin rod or element 18, which projects horizonta y outward through the rear wall 5, the elements 18 being. in turn pivotally connected with a sliding head 19, arranged for movement on and longitudinal of the axle 1 and operable thro h thef me-- dium of a forked lever 20. It wi be under I I stood, of course, that there are'four salts of the toggles 16 and a correspondingnu'mber of elements 18 and that owing to engageme t of the elements with the sleeve 19 moveineflt' diametrical axes 6 5 ofthe latter will serve for moving the brake f8 5 shoes 13 simultaneously.

Arranged in t1 ceasing oneend thereto is a plurality of leaf-sprin s 21, disposed, respectively, for actionpn t 'ejoints 17 of the to glee to maintain the latter normally in brea -joint relation, with the shoes 13 retracted to negative or non-braking position. In practice the brake-shoes 13 I means of the spring 21, under which con 'tions the shell 11 is released to permit free rotation of the wheel upon the spindle 2. en, however, it is desired to brake the wheel for retarding the ppingof-the. vehicle, the head 19 is moved by the lever20 in the"direc-" tion indicated by the arrow -in-Fig. 1, thereby exerting traction on the elements 18, thus operating the to gles 16 to move the shoes 13 outward through openings 15 and into frictional engagement with the .surface' or band 12, it being understood that as soon as the lever 20 is released the springs 21 will again actuate the toggles for, automatically re-- tracting the shoes.

From the foregoing it.1 's apparent that I 5'and each fixed at produce it simple efli'eient form of device edmirably adapted for the attainment of the ends in view, it being understood that minor I changes in the details herein set forth may he resorted to without departing from the spirit of the invention.

Having thus described my invention, what I claim is In a device of the class described the 00111 binetion with 21 vehicle axle and wheel, of ti easing fixed on the axle and having an annular marginal wall, a shell fixed for rotation with the wheel and resenting iibrake-band surroundin said we 1, the said annular marginal wall having openings then-through at regular intervals, a plurality of radiallymovable brake-shoes arranged in the casing and movable through the said openings, to contact with the brake-band of the shell, a plurality of toggles connected respectively with and for actuating the said shoes, means for simultaneously operating the toggles to ;project the shoes outwardly into braking position, and spriii s having loose bearing a aiiist the intermediate portions of the toges to automatically move the shoes to non- I waking position. i

In testimony whereof I aflix my signature

Images