US498402A - Machine - Google Patents

Description

(No Model.) 2 Sheets- 311961: 1. T. J. MGARTHUR. STREET SWEEPING MACHINE.

Patented May 30, 1893.

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(No ddel. '2 Sheets-Sheet 2 T. J. MOARTHUR. STREET SWBEPING MACHINE.

No. 498,402. Patented May 30, 1893.

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UNITED STATES PATENT OFFI E. v

THOMAS J. McARTHUR, on NEW YORK, N. Y.,ASSIGNOR 'ro LAURA snAvE, or SAME PLACE.

STREET-SWEEPING MACHINE.

SPECIFICATION forming part of Letters Patent No. 498,402, dated May so, 1893. Application filed January 14, 1892. Serial No. 418,027. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS J. lVlCARTHUR,

a citizen of the United States, residing in-the city, coui'1ty, and"State of New York, have 5.. invented a new and useful Improvement in I Street-Sweeping Machines, of which the followingis a specification.

My invention relates tothe class of sweeping machines in which revolving brooms are used i and the invention con'sists,.first, in-the employment of two brooms or broom cylinders whose axes are at a right angle or nearly so to each other and each axis is atan, angle of forty-five degrees to the line of travel when in operation so that the dirt will be movedin. opposite directions and transversely to the.

street.

Second. The invention further consists inprovidinga receptacle for the dirt lifted by each broom, so constructed and arranged that the dirt will be collected by the motion of the brooms as will hereinafter appear. 1

I attain these objects by the mechanism illustrated in the accompanying drawings, in

2 5 which i e Figure 1, is a plan of the machine as seen from above it and without the fioorin g or platform over the frame Fig. 2, is a side elevation and with the brooms and dirt boxes in 0 perspective. Fig. 3 is avertical transverse section of one of the dirt boxes. Fig. l is a detail view of a sectional apron or scoop with which one or both dirt boxes may be provided. Figs. 5 and 6 are sectional detail 3 5 views illustrating different ways of attaching the apron or scoop to the lower part of a dirt box.

Similar letters'refer to similar parts throughout the views.

0; The main frame A, may be made ofwood or metal and is supported by suitable bearings on themain shaft or axle B, which is carried by the wheels 0 and C. One of the wheels as at C is provided with a pawl and ratchet mechanism as at D, to give rotation to the brooms, similar to ordinary sweeping machines. The rear broom E is constructed in the usual manner and is mounted obliquely to the shaft or axle B of the machine and in rear thereof, as shown. The axis E of the broom E may be journaled in arms or bearings E supported by a verticallymovable dirt box Garranged in front of said broom; a lever E being arranged near the 'drivers seat through which said box and broom can be raised and lowered together as required, in the manner hereinafterdescribed. The driv ing'w'h'e'el F on the'axle B engages with a pinion F onthe counter shaft F -which carries th'esprocket wheel F and chain beltF 6:; .to the sprocket F on the ro'tary'broom shaft, which shaft is inclinedat nearly half a right angle tothe main frame A, so that the sweep ingactio'nis partly'ina transverse direction or across the street as in ordinary machines.

Adjacent to the broom I provide a dirt receiving box G, the rear edge of which is curved to correspond nearly to the circumference of the broom and at the lower corner, is attached a plate G with an edge like a dirt scoop that collects the dirt as it is raised from" theisurface of the street by thebroom splints and the air currents produced by the broom.

Said box G is provided with a hood or cover 7 G? which extends rearward snfficiently far to 7:;

catch the dirt and dust in the air currents and thereby cause the dirt to be collected in the box G whence a removal may be made by any suitable means such as a scraper or d rawer or sliding or tilting bottom as desired.

' To prevent any reaction of the currents of air from the box G, an opening or long slot G is provided near its upper front corner as shown in Fig. 1, for the escape of the air and in said opening or slot is pivotally supported a defleeting plate or valve G which by means ofthe lever G at one end can be adjusted tov close or open the slot and thereby control the air currents as well as collect the dirt and dust into the receptacles.

I have found both from observation and experiment that there are conditions where a single broom will not and cannot perform efficient sweeping and for several reasons, the chief of which is that when the dirtis wet and somewhat plastic, the splints of the broom .areliable to bend back 'from the mass,and

frame A, so as to be raised and lowered by the dr1ver either by hand or foot levers as desired, and said broom is revolved in the same direction as the main shaft and its driving Wheel, so that the splints of the broom descend into the dirt and disintegrate the mass and then sweep it back up ascoop-shaped apron H and thus lift the dirt into a box L behind the broom; but the splints of this broom, are much stiffer than those of the rear broom, and must necessarily be so made to properly give this disintegrating action; but while their st fliness and coarseness prevent their most efiicient sweeping action, yet the particles of dirt are left in the best possible conditlon for the rear broom to complete the work perfectly, as the mass has not only been penetnated by the splints, but moved in two die ti.onsviz;.to the rear and by an o l q movement. This front broom is driven by a sprocket. belt K, as shown, leading from. a sprocket wheel. K on a counter shaft K which 1s driven by the same. gear wheel F hat drives. the rear broom. 'Q l IQ m 'Iihe same motion as, the. mai

shaft B,,an intermediate pinion K is. em-

ployed audit is suspended in: thesameiliftngdo i oe thatraises thebroom and-dirtbox, Y

wh ch. are supported by chains. K4 passed over sprocket wheels K on a shaft K extended across the, frame A and rotated by a pawliand ratchet lever E19 near thedriversseah,

Byreferenceto Figsl and 2 it willbeseen thateach dirtbox G. and L is provided with vertical. guide standards-M the upper ends 013 whlchateinserted hroug-h collars secured at convenient points to the frame of the ma.-

chine. The front box L is suspended by the chains K from the sprocket wheels K onthe shattli? before mentioned. The rear. boxG is suspended in like manner by means of: cha nslsi from sprocket wheelsKL onashaft K, as shown.

The shafts K and K are provided with sprocket wheels K connected by a chainK so that by shifting the pawl lever E? mounted on the shaftK adjacent to thedrivers seat.

both, dirt boxes. G. L. and attached rotary brooms EH can be raisedor loweredatwill. I prefer'to make the apron or scoop II. in

the-front edge of the dirt box L insections i and each suspended.independentof theother asshown inFig t. sothat they canioonform. to thevarying undulationsof. the-street. s-nrface and rise over obstructions withoutintenfering witlnone another. Forthispurposel have madethem with asomewhat bluntpoint and slightly curvedupwardin front, as shown atL inFigs. 2 and 5, and their upper ends are suspended by volute springsL to. a bar.

But to give the L depending from the frame A, as shown. These volute springs may however be dispensed with and the scoop sections may each have a lever or arm I-I ,Fig. 6,at its back pivoted upon a rod H and supported by a wooden pin H similar to the shoes of grain drills, so I that the shoe or scoop section may yield before breaking anything but the pin. This front box L may be constructed like the one ,for the rear broom with an air vent, and an adjustable valve and a pan or scraper or tilting bottom.

In Figs. 2, 3 and G I have shown each dirt box provided with a hinged bottom N which i can be tilted down to discharge the contents of the box. 7 I

Having thus described my invention, .1 desire to secure Letters Paton-hand therefore claim- 1. In astreet. sweeping; machine thecom binatiou of two rotary brooms having their iso and at an oblique angleatoan intermediate '1 taclefor the dirt litted: each brommand gearing for actuating said brooms front the wheel: axle. substan tialliyr as described.

V 2. In astr'eet sweeping machine, the coma jbination. of a frame having ama-irr shaft or iwheel axle, two rotarybrooms. having their soand at an oblique angle to-the wheel. axle, lone of said rotary brooms being supportcdin advance of the wheel axleand the other in Irea-r theneofiand gearing for actuating said broomstfrom. the wheel aatlmsubstantially as 5 described. 3. In a street sweeping machihmtbeoombination. of aframe having; a main. shaft or "Wheel axle,.tworotary brooms having their {axes at a right angle to each other orpnearly Eso and; at an. obliqueangleto the wheel axle, Zone of saidrotary brooms beingi supported in advanceof thewheel axle andathe other in reanthereof, gearing fioractuating said brooms j from thewheel' axle, obliqnelyrarranged dirt boxes or. receptacles for thedirt lifted bysaid H brooms and means for raisin g, and lowering said boxes and brooms together, substantially if as described.

4. In atstreetisweeping machine,.the. com- ;jbinationtwith a rotary broom, of a: dirtbox. ihaving a hood or cover arranged with one :edge nextto thebroomtand ptovidedwith an air vent having an adjustable valve therein,

substantially as described. THOMAS J. MGARTIIUR.

Witnesses:

Hueo MAETKE, J oHN. T. SHAVE.

iaxes at a right angle to. each other or nearly Eaxes at a right angle toeaclr other or nearly too

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