US1255519A - Street-sweeper. - Google Patents

Description

A. F. ELLIS.

STREET SWEEPEB.

APPLICATION mm Jun 3. I917.

Pa tenfmdl m. 5,1918... 2 SHEETS-SHEET l HUI "ni' l lilll r l l l A. F. ELLIS.

S'KBMT SWEEPER. APPLICATION FILED JULY 3. 1911.

Patemfifl Feb. 5, 191.

2 SHEETS-SHEET 2.

l lit lilllllit l whom it y ounce:

- Be it hown that it Are F. Ems, a citizen of the United States, and a resident 63f Boston, in the county of Suolk and tub tm vent certain new and useful Improvements in Street-Sweepers, of which the following is a clear, and exact specification.

This invention relates to that class of street sweepers wherein the dust and dirt are swept up-and conveyed into a receptacle carried the machine ;-and it has for its object the ecting of means whereby the sweepin and ath" means may be yieldingly brougt alongside the curbwithout danger of breakage, and thereby to clean the gutter close up to the curbstone; to means for preventing the line dust aroused by the sweeper brush rom escaping to the atm here; and o certain improvements in details of construction. o s

eferring to the drawings fo :wrpart of this sperhfication, Figure l is a side elevation of a sweeping machine embodying my improvements, parts being represented as broken away. -Fig. 2 is a plan. view of the chassis and. main operative mechanism of the sweeper. i Fig. 2 is a sectional detail view of a portion of the brush suppo m; arm and bar. Fig. 3 is a vertical transverse section of the machine. Fig. 4- is a perspective view of the dust collect ng apparatus.

In Fig. l, the reference numeral 1 designates the chassis of the auto-truck with which the sweeper is combined; 2, are thedrivers; and 3, the dirt receiving bin. The sweeping and collecting means are connected with, and mainly supported by, a bar l slidable in ways 5 transversely of the chassis frame 11, the sweeper comprisin a rota brush 6 having its bearin in tlie arms depending from the ends 0 the bar, and rotat by means of power taken from one of the drivers 2, preferably by means of a rope drive-9, and a pulley 10 on the driver, and a suitable ulley' on the brush shaft.

The" dust and dirt swept forward by the brush are received b a worm conveyer ll feeding toward its ongitudinal center, at which point an elevating conveyer '12 takes the same and carries the debris up to a spout or chute 13 by which it is directed into the bin 3. To normally locate the sweeper and connected parts centrally with respect to the ohms, I provide two l cit on "14':

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onwealth of Massachusetts, have ineach attached at one end tothe chis frame, and at the other end to the bar 4, so that whlle sald parts can be oved transversely of the chassis, the springs will brin the same back to normal.

prefer to make the elevator 12 substantlally circular, as shown in Fig. 3, although l do not restrict myself to this exact form, and to have its uppermost point pivotally supported by the bin or otherwise, while its lowermost section is attached to the hood 15. This hood is provided for keeping the dust from escaping, and is sufliciently loose to permit the slight rocking motion of the elevator.

Theelevator comprises, in addition to the case 12, an endless cable or'the like 17 carrying disks 19 by which the dirt is moved, and thls cable is preferably actuated by-a wheel 20 having notches 21 entered by the disks.

To further keep the dust from escaping 22 connected at one end with the apron or "hood l5, and at the other end with a box 23.

][n this box is a suction blower 24 adapted to receive the dust and to discharge it through its outlet 25 against the surface of an endless apron 26 which is kept in constant motion.

The air from the blower passes through one thickness or section of the. apron into the hollow square bounded thereby, and thence escapes with its impulse much checked, through the lowermost section and then through an opening 27 in the top of the bin into t e bin itself. The air from within the bin escapes from an opening 29 in to forward gart of the top; As the air thus escapes, the

ust is first collected upon the surface of the apron adjacent the blower, and then as the apron passes down and thence over the opening '27, the dust thus collected is dislodged by' the descending air current and deposited in the bin. To aid this, a revolving'brush 30 may be employed.

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The operation of this cleaning machine is i as follows: As the chaufi'eur guldes the ma chine along a street, the revolving brush 6 gathers up and throws forward the dust and dirt into the path of the worm conveyer. This moves the dirt toward its midlength, where it is received in the elevator 12 and carried up to the conduit or chute 13 from which the dirt descendsinto the bin.

As already described, what dust is liable to ape from the hood part is drawn up through the flexible tube 22 and finally delivered into the bin with the dirt carried up by the elevator.

To enable the truck to be speeded. up when going from one section of the city to another, I prefe'rto have the sweeper portion ada ted to be raised out of touch ,Wlllh the roa way, as indicated, in Fig. 1, suitable means eing provided for permitting the chauffeur to raise and lower it. Cams 31 controlled by rockshafts 32 may be employed for the purpose.

I'have shown the dust separating box 23 as supported on to of the bin 3, butI do not restrict "mysel to this location. Thus positioned, the bin is stationary upon the chassis, and has a door 33 at its rear end,

- and a false front 34 which can be drawn rearward by a handle 35 for emptying the 2, and the arm 7 at that side of the machine comes in contact with the curbstone, there is no danger of bending or breaking the parts by such collision, since the arm 4 can slide relative to the chassis for several inches, the spring 14 at the other side yielding to permit such movement. The chauffeur, knowing by the slight scraping sound that the machine is traveling nearer the side walk than necessary, steers the truck slightly farther away until he hears onl an occasional scrape of the arm 7 witii truck, as the shaft 40, or with other of the truck orthe chauffeur himself.

. versel the curbstone,- gthereby cleaning the gutter close to the curb without the possibility of injury to the machine.

The purpose in making the elevator endless, as shown in Fig. 3, is to enable the dirt swept up by the sweepin means to be delivered to the top of the iii-,3 without interference with the mechanism of the autoparts I do not claim inthis application the dust separating apparatus, but wish to reserve the same for a subsequent application.

What I claim is: 4 1. A street swee er comprising a conveyance, a bar slidab y carried b the conveyance to project beyond the si es of the latter, springs acting normally to-retain said bar centrally of the conveyance, and a revolving brush carried by said bar.

2. A street sweeper comprisin a truck having driving wheels, a bar sli ably car- .ried b the conveyance to project beyond the si es of the latter, a rotary brush carried by the said bar having a pulley, a pulley carried by one of the drlving wheels, said pulleys havin dee grooves, and a rope drive joining t e sai pulleys.

3. A street sweeper comprisin a chassis frame, a channel iron bar exten ing transof the frame and projecting from its si es, the flanges of said bar being beneath, anti-friction rollers suitably supported and fitting between said flanges, springs normally retaining said bar centrally, and a rotary brush supported by said bar.

In testimony that I claim the foregoing invention, I have hereunto set my hand this 30th day of June, 1917.

ARCHIBALD F. ELLIS.

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