US574850A - Street-sweeper - Google Patents

Description

(No Model.) v 2 sheets-sheet 1.

- M. CARRIER.

STREET SWBBPER.

10.574,350.v A PatentedJan. 5,1897.

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2 Sheets-Sheet 2.

M. CARRIER. STREET SWEBPBR.

(No' Model.)

'wAsHmmuu n n brush mechanism supporting frame.

UNITED STATES PATENT OFFICE.

MILO CARRIER, OF ST,h PAUL, MINNESOTA.

STREET-SWEEPER.

SPECIFICATION forming part of Letters Patent No. 574,850, dated January 5, 1897.

Application tiled September 2 l, 1895. Serial No. 563,188. (No model.)

T0 all whom it may concer-n:

Be it known that I, MILO CARRIER, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have made certain new and useful Improvements in Street- Sweepers, of which the following is a speciiication.

This invention relates to street-sweeping machines; and it consists in the construction, combination, and arrangement of parts, as hereinafter shown and described, and specifically pointed out in the claims.

In the drawings, Figure l is a side elevation with parts removed for clearness of illustration. Fig. 2 is aside elevation of the brush mechanism detached. Fig. 3 is a cross-sectional view of the brush mechanism. Fig. 4 is a longitudinal sectional elevation of the brush mechanism. Fig. 5 isa detached sectional detail of one of the sides of the depending adjustable dust guards or aprons detached. Fig. 6 isa plan view of the machine complete. Fig. 7 is a detached plan view of the Fig. 8 is a side elevation, and Fig. 9 is a plan view, of a portion of the brush mechanism, illustrating the manner of arranging the guardapron. Fig. 10 is an enlarged side elevation, and Fig. 1l is an enlarged sectional front elevation,of one of the hangers of the smaller adjustable brush, illustrating more fully the construction of the adjusting mechanism.

A' is a platform or fralne mounted upon wheels A2 A3 and carrying a mot-or B, preferably of a hydrocarbon type, by which motion may be imparted to the moving parts.

Suspended beneath the framework A', preferably just in rear of forward wheels A2, is an oblong frame D', having two cylindrical brushes D2 D3 journaled therein and connected by gearing D4 D5 D6 D7, so that they both revolve inward toward each other, as shown.

The motion is imparted to the pulley a' on shaft a2 of the brush D2 by a belt a3 from a pulley a4 on a counter-shaft E', the latter in turn driven by a system of belts, as shown, from the motor B.

The frame D' is supported from the frame- Work A' by side frames F F2, running in brackets F3 F4 and adapted to be adjusted perpendicularly by raclr-and-pinion adjustments F5 FG, as shown, to regulate the position of the brushes.

The journals b' b2 of the shaft of the brushcylinder D3 are supported in boxes b3 b4, which are adjustable perpendicularly,so as to elevate and depress the smaller brush independently of the larger brush, as more clearly shown in Figs. l0 and ll, whichv represent enlarged detail views of this adjusting mechanism.

Supported through the platform A' and fitting by its lower rim inside the frame D'is a hood G', which is converged and leads off to one side into the lower or inlet side of a suction-fan G2, as shown, so that all the material brushed up by the brushes will be drawn upward by the fan.

The outlet of the fan leads over into the inlet of the centrifugal or vacuum dust-collector II', while the discharge I-I2 from the dustcollector leads into an elevator H3, from whence it is conveyed away, as into a receptacle K, attached to the rear of the machine.

The hood G is stationary, while the fra-me D' is adjustable perpendicularly independently of it. Y

IVithin the hood G', above the cylindrical brushes D2 D3, are curved catch-plates d d2, partially covering the cylindrical brushes and supported from the frame D' by small bars d3 di, as shown in Figs. 3 and 4, so as to be adjusted therewith to retain their same relative position to the brushes. These plates d' cl2 serve as guards to the brushes to catch the material thrown up by the brushes and prevent it from being carried around by them and thrown out from the other side, but retaining it within the iniiuence of the upward draft of the suction-fan. The smaller cylindrical brush is made to revolve at a greater speed than the larger brush, so that it will catch and throw upward inside the hood all the material swept back by the larger brush, thereby gathering and elevating all the material and without creating dust or iiying fragments.

The material discharged from the suctionfan by passing into the dust-collector is completely separated from the air4 and is discharged into the elevator and thus conveyed away, thereby avoiding the creation of any dust upon the street.

IOO

The arrangement oi' the oppositely-working brushes is au important feature of my in Ven tion, as without this arrangement it is not possible to avoid making very annoying clouds of dust, especially in swcepin g asphaltum pavements.

The elevator may be arranged at One side, if preferred, to load into a wagon alongside instead of in the rear of the machine.

A guard-apron )I will be attached to the f rame D and depending therefrom and made adjustable to close the gap between the lower edge of the frame and the surface being acted upon to still further confine the air and increase the force of the suetion-fan. This guard-apron consists of two flat plates M, parallel with and lying close to the ends of the frame D, and will be proy'ided with slots for the passage of the shafts of the brushes, the slots being' elongated perpendicularly to provide for the adjustment and connected across their forward ends by an inclined cross-plate M', as shown.

Having thus described. my invention, what I claim as new isl. In a street-sweeper, a platform mounted upon wheels, a stationary hood and windtrunk supported by said platform and through which artificial air-currents are caused to pass, a frame suspended from said platform, and inclosing the open mouth of said hood and adjustable with relation to said platform, and two oppositely revolving cylindrical brushes journaled to said frame within the mouth of said wind-trunk, means for revolving one of said brushes at a greater speed than the other, and means for adjusting said 1norerapidly-revolving brush independently of its supporting-frame, substantially as and for the purpose set forth.

2. In a street-sweeper, aplatform mounted upon wheels, a frame suspended adjnstably beneath said platform, a stationary hood and wind-trunk supported by said platform and inelosed by said frame, and through which artificial aircurrents are caused t0 pass, and oppositely-actuated cylindrical brushes supported by said adjustable frame beneath the open mouth of said wind-trunk, substantially as and for the purpose set forth.

In a street-sweeper, a platform mounted upon wheels, a frame supporting oppositelyrevolving cylindrical brushes and suspended from said platform and adapted to be adjusted perpendicularly with relation thereto, a stationaryhood and wind-trunk above said frame and brushes, and through which artificial aircurrents are caused to pass, guards supported from said adjustable frame and depending from the sides thereof and yieldable perpendieularly with relation to said frame, to cover the space between the lower surface of said frame and the pavement being swept, to prevent the escape of dust, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- IIQSSQS.

MIL() CARRIER. In presence of- C. N. WOODWARD, WM. A. PETERSON.

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