US819178A - Street-sweeper. - Google Patents

Description

PATENTED MAY 1'; 1906. P. A. SHELBY. STREET SWEEPER.

APPLICATION FILED 0 0120, 1904.

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Inven'k'or PQZQFA. fiizleg Witnesses UNITED STATES PATENT OFFICE."

PETER A. SHELBY. OF LOUISVILLE, KENTUCKY.

STREET-SWEEPER.

Specification of Letters Patent.

:atentedMay 1, 1906.

Application filed October 20, 1904. Serial No- 229,304.

receptacle carried y the machine.

A further object of the invention is to prov de a dirt-gathering machine in which the dirt and dust are taken up by a traveling con- -veyer or endless belt from which the lighter particles of dust are removed as the belt travels, the latter delivering stones and other heavier articles to a suitable receptacle.

A stil further object of the invention is to provide a dust-gathering device formed of a number of independently-yieldable sections,

so arranged as topermit of their freely passing over any immovable obstruction which .may be encountered, without injury to the machine.

With these and other objects in view, as will more fully hereinafter appear, the invention consists 11] certain novel features of construction and arrangement of arts hereinafter fully described,illustrated 1n the accompanying dranings, and particularly pointed out in theappended claims, it being understood that various changes in the form, proportions, size, and minor details of the structure may be made without departing from the spirit or sacrificing any of the adven ta 'es of the invention.

in the accompanying drawings, Figure 1 1s a side elevation of a street-cleaning machine constructed 1n accordance with the inven-' tion. Fig.2 is a longitudinal sectional elevation of the same on the line 2 2 ofFig. 3. Fig. 3 is a rear elevation of themachine, parts being broken away in order to more clearly illustrate the construction. Fig. 4 is a sectional lan view of a ortion of the machine.

Fig. 5 IS a detail sectional, view of theiowerportion of the dust-gathering device. Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

The working parts of the apparatus are mounted on a Wheeled frame .10, that preferably is formed of iron or-steel, the froir". of the frame being reduced in width and having a goosencck 11, under which the front wheels may in part pass when the machine is being turned. On the rigid axle 12 is loosely mounted a. pair of wheels 13 of comparatively large diameter, and to one of them is secureda large sprocket-wheel 1t and a gear-wheel 15, from which movement is transnntt ed to the various working parts of the mechanism.

The front, sides, and rear of the machine are inclosed by a casing 16, the lower portion 17 of which extends down close to the surface of the ground in order to prevent as far as possible the escape of dust. Projecting inward from the inner l'acesol' the side portions 17 of the, casings are scrapers 18, which act to direct the dirt inward toward the center of the machine. These scrapers are formed of any suitable material, and when acting on smooth-surfaced strectssuch, for instance. as those formed of asphalt-they will act as scrapers. Extending transversely across the casing at a pointadjacent to the scrapers is a brush 19, which may be formed of any suitable material and preferably is held down in contact with the surface to be cleaned by means of suitable springs. In this connection it is to be noted that the supporting-bars for the brushes and scrapers form the lower part of the casing and are connected to the' upper part thereof by suitable springs 20 of any desired character, these springs being preferably seated in recesses 21, formed in the side bars of the frame, as illustrated in Fig. 3. T hesc recesses extend for the full length of the frame members and receive the lower edges of the upper portion of the casing, so as to form a telescopic joint through which little or no dust can escape. Excessive movement is prevented by pins 21.

At a pointto the rear'of the brush and scrapers is arranged a dirt-gathering elemen 25 in the form of a pivot-allyrnountedblade, said blade being formed of a plurality of independently-movable sections 26, that may yield to conform-to irregularities of the surface being cleaned. All-of the sections are mountedon a transversely-disposed bar 27,

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to the rear of which is a bar 27, carrying an below the movable sections 26 ofthe dirtgathering blade, while the central portion of the spring is secured to the bar 2 The edge portions of the spring are provided with slits arranged approximately in alinement with the division-lines oi the blades 26, so that each blade may bev properly held down in contact with the surface to be cleaned. Both edges of the spring, however, bear on the sectibns 26, and should any section meet an immovable obstruction that will ca'useit to yield bacluva-rdinstead of riding up the section will turn on the pivot '27, slightly raising the pivot-bar and permitting the secticn'to ride over the obstacle, after which the under side of the spring 27 will serve to re store-the section to its initial position.

T he fraine isprovided with bearings for the support of a transversely-extending shaft 28, to which'are pivoted'two side bars 28, that carry at. their lower ends the cross-bar- 27.

On the shaft 28 is secured a roller 28 and at the lower portion of the side bars are arranged bearings for the support of a roller 29, an end less carrier passing over said rollers and carrying the heavier particles of dirt up to a receptacle 32.

Theendless conveyeris operated from the geenwheel 15, the latter lnterrneslung with a from each other bye horizontal partition 39,

that extends to epoint close to the upper run of the conveyer; Above the partition 39 is'a second artition 40, arranged on a. line slightly inclined from the horizontal and disposed on s line substantially radial from the latter being a oovethe par; tion 4 shaft 34, so that it divides the cesing of the suctron-fenrnto an inteice and s n cr d, the

reerend of this partition is inclined upward, forming a shelf 41, that is disposed approximatelyparellel with the'upper run of the-conveyer.

At a point above the partition iO is a wa-, ter-tank 42, held in positionby straps 4:3, and in the lower portion of the tank are small jetnozzles 44, through which minute jets of water are discharged onto the partition 40. From the rear portion or" the water-tank extends a curved hood Un erthe hood a transversely-disposed shai't #18, from whit-ir adiete wings 49. The shaft 48 is extend-so out through one end of the casing :and is pro v vided with e. crank-handle 52 inord to per init turning of the shaft and blades by hens.

In the operation of the device the machine is-drawn along the street by horse oro'ther power, and the dust and dirt are engaged by the scrapers 18 and moved forward toward dirt is loosened and disturbed byithe brush l9 and is gathered up by the collecting blade 20 2\nd. delivered to the endless belt 30, the heavier particles traveling up over the top roller 28 and being deposited in the receiver v The tens 36 and 37 are revolved from the and gearing 54, arranged at one side of the frame. The blast-fen 37 direc ablast of air downward and rearward to that space be tween the partition 39 and the surface being swept and in advance of the ,con eyer, and the collected dust is-driven upw rection of the arrow, but ai'ter'passing'heyond the rear end of the partition is drawn I reptacle, means in.

inward in the directionef the arrow by the suction-M1136, and thence is directed over the partition toward the fan. Vvhile passing under the nozzles 44, thedust iSIXlOiSiQIlQLi and is blown in this moistened condition against the vanes -19, any excess of moi? passing through perforations 55 and it on the (Oll'VGffGT-lDGlt.

The vanes may be revolved from time as occasion requires by turn crank 52 and the accuinnlated dirt through over the top, of the partition t].

.Prccurnulation of dirt on the apron or conveyer is prevented by the edge of the dirt-receptacle, which serves as a scraper for re-' moving adhering particles. 7

Having thus described the invention, what is claimedis- 1.v In a. street-sweeper, easing, e. dirt-receptacle-an endless conveyer for carrying dirt upward to the receptacle, means for diranged within the cas ng in nt'of the cor f n n connection with the let:

dirt

onto the convoyer, a series of partitions disposed at angles oblique tothe plane of the ,conveyrr and forming stationary walls of the passage, and fans or blowers for d' o bur-rents or" air through the passe. tact "with the carry ycy and for iihdrawiit-g t a point in l .i 1 advance of the dumping point of the convo 2 ea rpzirticles din.- L "t MILO conveyor, means for removing the. lighter particles of dust and dirt from said conveye sdvancc of the dumpinge o'int the lett the center. As the machine moves along sprocket-wheel 14 by a chain or link; belt'53 rd in the di-v reeting dirt onto the conveyor, partitions er w. is ssage, emu means for dil frame, a plurality of independently-yieldable 15 blade sections mounted on the pivot-bar, springs for holding said blades in operative position, said springs being approximately U-slmped in form and bearing on both-top and bottom of each section. 20

In testimony that'I claim the foregoing is my own I have hereto afiixed my signature in the presence of two witnesses.

' PETER A. SHELEY.

\Vitnesses:

J. H. Jocntnr, J12, ARCHIBALD BULLQCH.

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