US1417880A - Attachable band brake - Google Patents

Description

H. ALTERGOTT. ATTACHABLE BAND BRAKE- APPLICATION FILED ocr. I. 1 920.

Patented May 30,1922..

gwwnfoz UNITED STATES PATENT OFFICE;

HENRY ALTERG-UTT, OF SHIEBOYGAN, WISCONSIN.

ATTAGI-IABLE BAND BRAKE.

Specification of Letters Patent.

Patented May 30, 1922.

Application filed October 1, 1920. Serial No. 414,004.

Band Brakes, of which the following is a specification.

The invention has for an object to effect an improvement in brakes for motor vehicles, and particularly to provide an attachable brake assembly adapted to be mounted upon motor vehicles of a familiar type now upon the market. It is a particular object to enable the mounting of this brake without requiring machine operations of any kind, or alterations in structure of: the familiar type of vehicle as now constructed, in order to enable the mounting of the hand brake to coact with the drum already upon the vehicle and to be operated by the brake rod now employed for operating an expanding internal brake operating upon the drum, upon which same drum my device will engage. The invention is also readily adaptable in a similar manner to various other vehicles, as will be readily understood.

Additional objects, advantages and features of invention will appear from the construction and arrangement, as well as combination of parts hereinafter described and shown in the drawings,'wherein Figure 1 is an inner side elevation of the right hand brake assembly,

Fig. 2 is a rear elevation thereof,

Fig. 3 is a fragmentary sectional view thereof, I

Fig. 4 is a detail of the brake perch.

In the particular type of vehicle upon which the present embodiment ofmy invention is shown, the rear axle assembly includes a housing with outer tubular elements 10, upon which are brazed or otherwise secured terminal castings 11, which include planiform circular brake housing plates 12, one of which castings is here shown. The plate 12 is braced at the upper part by integral diagonal and parallel web elements 13, between which there is formed a bosslt through which an opening is drilled, wh ch receives the threaded shank 15 of a spring perch 16 from which the shackles 17 are hung to carry the rear spring 18 as shown in Fig. 2. The plate 12 is also provlded with a boss 19 at the rear side, in which a bolt 20 is customarily engaged, suitably termed to support a brake shoe not illustrated, and customarily located at the outer side of the plate 12. A brakedrum 21, secured to the rear wheel 22, is customarily employed, of a'diameter the same as that of the plate 12.

My invention includes the formation of a brake perch 25,,which is shown approximately one-half full size in Fig. 4. This perch includes a base plate .26 of considerable body, shaped so as tolsnugly fit against the plate 12 between the webs 13, this plate 26 being recessed on the outer side tofit snugly over the boss 14 and a web 14' extending therehelow, as indicated at 27 in Fig. 4. The inner face of the plate 26is smoothly finished, and centrally of the circular upper part of the recess 27 there is formed an opening 28 adapted to aline with the opening through the boss 14, and receive commonly therewith the shank 15 of thespring perch. The plate 26 is formed with an outwardly projecting shoulder portion 29 at its upper part, adapted to rest upon the upper edge ofthe plate 12 so that the weight carried by the perch 16 when engaged in the plate 26 will be transmitted to the plate 12 without undue strain upon the shank 15.

A horizontal rectilinear arm 30 is proj ected outwardly from an upward extension of the recess and the upper side of the rectangular passage 34L formed in a suspension lug 35 welded or integrally formed upon a resilient brake band 36 the ends of which are located forwardly of the assembly. A,

set screw 34; isengaged perpendicularly in the member 35, being entered axially in the spring 88, and if desired may be used to limit downward movement of the upper part of the band with respect to the arm 30, the passage 34 being considerably larger vertically than the arm 30. A look nut 37 is engaged upon the screw 34 to hold it in adjustedposition. WVith the screw sllghtly entered in the passage 34, the sprlng engages therewith and being snugly seated in the recess 32 serves to hold the brake band snugly against lateral movement, and also against rattling, and when the brake is applied and greater strain may be expected tending to move the band laterally with respect to the drum 21, the downward movement of the upper part of the band due to its tightening upon the drum will enter the lower part of the screw 34' into the compacted spring 33 and the recess 32, thereby making positive the securement of the upper part of the hand against lateral displacement. At the rear part of the band there is firmly fixed therein or thereon a stud 39, and an L-shaped bracket piece 40 is provided, having a short arm and a long arm, the former being transversely curved to fit snugly against the outer side of the band 36, and formed with a transverse slot 40 engaged around the stud 39, whereby the latter may have a certain play therein transversely of the arm. A compression spring 41 is confined between the bracket 40 and the outer end of the stud, between washers 42, one against the bracket and the other held upon the stud by a cotter pin 42' inserted through the outer end of the stud. The long arm of the bracket is formed. with 'a longitudinal slot 43, adapted to receive the usual brake mounting bolt 20' before mentioned. The bracket 40 is adjusted so as to normally hold the band away from the drum by support of the spring 41, and when the brake is tightened, the spring will be compressed, permitting the band to move inwardly against the drum, as will be readily understood. On

one end of the band, there is provided a ited area is minimized. A fulcrum lug 47 is formed upon the opposite end of the band, similarly suupported by a thickened portlon 48, extended a suitable" distance and tapered as in the case of the thickened portion 45. The lug 47 is formed with an opening therethrough receiving loosely a fulcrum bolt 49, pivoted upon a lever 50 of the second class, a short arm of which is pivoted upon the lug 44, they long arm of which is extended upwardly so as to lie closely beside the bolt 49 when the brake is in released position. A

.brake rod 52 is engaged with the outer end of the arm 51 in the usual manner by means of a nut and lock nut as at 53, the fulcrum bolt is adjustable to compensate for the wear of the lining 54 of the band 36.

The passage 34 is slightly greater in Width horizontally than the horizontal transverse dimension of the arm 30, so that this point.

the lug 47,

when it is necessary to adjust the bracket 4.0

the bandhanger 35 may rock when necesof fieXure of the band and strain, is avoided,

and liability of fracture minimized. The same is true of the tapering of the thickened portions 45 and 48 at the ends of the bands, as will be readily appreciated.

The entire band is resiliently supported and held against rattling by the character of mountingprovided, in addition to the other advantages indicated.

In the installation of my device, the regular brake equipment ordinarily installed upon vehicles. of this type may be dispensed with, or retained as an auxiliary The mounting bolt 20 of the regular brake is re 1 moved and engaged through the mounting 9O bracket 40, and my brake perch 25 is secured in place by securing the regular spring perch 16 thereupon as illustrated in Fig.3,

. the removal of the Wheel being involved in such 1 installation. Before replacement of the wheel, the band is putin place by having the hanger 35 engaged upon the arm 30 and the stud 39 inserted through the bracket 40. The band being then adjusted suitably with respect to the periphery ofthe plate 12, the wheel may be readily removed and replaced without interference by the band 36 or its lining. The fulcrum bolt 49 is adjusted so that the end portions of the band will lie clear of the drum when the brake is in released position.

In use, the forward movement of the brake rod 52 will. draw downwardly upon the bolt 49 and cause the lever 50 to bear I upwardly on the lower end portion 45 of the band 36. This causes a contraction of the band upon the drum 21. The arm 30 prevents rotation of the band with the drum, and holds the part 35 against rotating movement with respect to the perch 25. Consequently, the contracting of the band produces longitudinal movement in the end portions of the band. The spring 41, nonnally serving to hold the rear part of the band spaced from'the drum yields and permits the contraction of the band, the slot 40 accommodating whatever longitudinal movement of the band stud 39 there may be at The band is also preferably made with suflicient stress tending to open it, to hold the end portions 45 and 48 away from the drum when the brake is released. Adjustment for wear may be made by means of the nuts engaged upon the bolt 49 over What is claimed:

1. The combination with an element fixed with respect to an axle oi a perch element attachable thereto and having a lateral arm for disposition adjacent a brake drum, a band element mounted for limited vertical movement on said arm, means yieldingly supporting the band normally above its operative position, a mounting engaged with the band at a distance from said perch element including means constructed for movement of the band toward and away from a circumscribed drum and for longitudinal movement of the band on the said mounting and resilient means directly but yieldingly opposing movement of the band toward the drum at said mounting.

2. A band brake comprising an upper mounting including a lateral arm, a band having a hanger element thereon formed with a transverse passage to receive said arm for relative vertical and rocking movement of the two, said arm being recessed on its upper side, a spring snugly engaged in the recess and confined between the arm and upper side of said passage for yielding support of the band, an element projected axially into the spring from the hanger, a lower support for the band including an L-shaped bracket having a transversely slotted short arm and a longitudinally slotted long arm, a stud on the band slidable longitudinally of the first slot and stud, a spring confined between the end of the stud and short arm, a mounting bolt adjustable in the slot of the long arm and releasable means to contract the band.

In testimony whereof I have affixed my signature.

HENRY ALTERGOTT.

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