US1827905A

US1827905A - Cleaning machine

Info

Publication number: US1827905A
Application number: US143483A
Authority: US
Inventors: Picker Charles
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-10-22
Filing date: 1926-10-22
Publication date: 1931-10-20
Anticipated expiration: 1948-10-20

Description

Oct. 20, 1931. c, PICKER CLEANING MACHINE 7 Sheets-Sheet l lN-VEN TOR (bar/95 Picker Filed Oct. 22, 1926 5/ A TO E C. PI ER CLEANING MACHINE 7 Shee ts s 2 Filed Oct. 22, 1925 TOR (barks B x er wm V Oct. 20, 1931. c. PXCKER CLEANING MACHINE Filed Oct. '7 Sheets-Sheet 3 INVENTOR (bar/e5 p/cA er ATTORNEY Oct. 20, 1931. c. PICKER I CLEANING MACHINE Filed Oct. 22, 1926 7 Sheets-Sheet 4 ATTORNEY Oct. 20, 1931. c. 'PICKER CLEANING MACHINE Filed Oct. 22, 1926 '7 Sheets-Sheet 5 ATTO NEY Oct. 20, 1931. c. PICKER 1,827,905

CLEANING MACHINE Filed Oct. 22, 1926 7- Sheets-Sheet 6 C. PlCKER Oct. 20, 1931.

CLEANING MACHINE 7 Sheets-Sheet '7 Filed Oct. 22, 1926 /az My /NVEN TOR [bar/e5 P/c/(er M ATTOR EY Patented Get. 2%, 1931 I i :1. earner; eee ee CHAR-LES Prensa, or ennenmnnw form V ennnnrne MACHINE Application filed (letober 22, 1928. Serial No. 143,483.

My invention relates to-cleaning machines Fig. 5 is an enlarged detailed view of the and particularly to a machine for cleaning means for regulating the squeezing of the floors. mop; .l p The primary object of .myinvention is to F'i 6 is a section in the plane '66 of 5 provide a device of this character which F 1 I will, in a single passage over a floor surface,

not only remove and collect loose objects F1 andparticlesofdirt,but Washandcompletely 1g. 8 is an enlarged fragmentary front.

clean and dry the same. The invention conview; I

1e templates either a self-propelled machine or F ig."9 is a partial sectional detail of a '60 a manually propelled machine which, as it clutch mechanism; I V progresses over the floor, first, picks up and Flg. l0 is a viewof the clutch mechanism collects comparatively: large objects such as h WH 111'F1g. 9 With the parts in a' slightly cigarette. boxes, cigar butts, papers and the (llfferent P 1 1011;

like; second, sweeps and collects all smaller g- 11 1S p p c W of detail o 65 particles'ofdirt and'dust;third,m,oistens and the f h scrubs the floor; fourth, mops and partially g- 2 an l g hh h P lh dries the floor; and fifth, completely dries T 3 E 2 h ra fi remwed; the floor. Another object of my invention is 1 enlarged Sectloh h t P 6 to provide a means -whereby the cleaning 1 3 of 5 7 r I mechanism may be raised from. the floor, 1S a Sectloh OfFlg- 12 1n the P a e l and-the device easily moved about in any di- 5 rection'by hand. .Anotherobject of my inls a frzlgmentil'ry enlarged sect-Jon r vention is to provide, in a machineof the 2. z fm of I Q t F general character, ameans for sprinkling the new 0 the-gems shown.m floor in which a measured volume of water g fg from the Fight d slde is delivered over a given area, and in which v the sprinkling system is automatically cut 31515 a z to F Q h by the stoppage of the cleaning mechag 21 l erenl g g g. 1

nism. Another object of my invention is to 'if of are? Sec Ion m t e P ahe 80 provide a means for conveying the dust and 19 is *2 rtial 12m View of the 6 smaller particles of dirt swept from the floor;ii tion Own i g p v p P g fi g g fl remove r Fig. 20 is a detail of an element. shown in i b a n 19: i, in k 9 h d and other oblects my Fig. 20A is a partial section of Fig. 18 in lnvention includes the novelelements and t11ep1ane2OA 2OA. comb nations and arrangements of elements Fig 21 is an enlargedyiew in the plane described below and lllustrated 1n the accom- 21 21 of p i 7 is a section in the plane 77 of l y g drawlhgs, 111 Which r V Fig. 22 is a fragmentary enlarged view of -90 1 is a $1618 elhvahloh of y machlhe the rear end of the machine; and Yfishhlg upon the Wheels y Which is P Fig. 23 is a section of Fig. 22 in theplane ported when moved about; 23 23 V ig. 2 is El plan view Of my machine With Referring particularly to .Figs. 1, 2, 3, 6 the top covers and the watertank removed; d 7, my hi comprises a Outer ag gii Fig. 3 is a longitudinal section of my ma- 1, which ma-y be closed at the top, if desired, chine in the broken plane 3-8 of Fig. 2; by th hinged covers, 2, but'which is open at Fig. l is an enlarged view of a detail of the bottom.- Within the outer case mess. themoptighteningdevice and a partial see cured thereto by a common plate, 3, at the p tion of Fig. 3 onthe line 4l4; front of the machine and-between suitable 1% front of the machine towards the rear as, 6, 7,

8 and 9, respectively. The whole machine is supported upon four rubber tired wheels, 10,

. attached to the transverse shaft, 25, (see mounted on axles, 11, which may be provided with suitable bearings (not shown) in the sides of the innercasing, and which are provided with clutch mechanisms, 12, projecting through openings, 13, in the outer casing. The clutch mechanism is shown in detail in Figs. 9, 10 and 11 and will be described later.

Mounted within the inner casing, and to the rear of the tank or reservoir, 9, is the electric motor, 14, which propels the machine over the floor. The motor, 14, turns the shaft, 15, through the bevel gears, 16, and the shaft, 15, turns the worm wheel, 17 through worm, 18, which coacts therewith. The worm wheel,17, is mounted upon a transverse shaft which carries, at its other end, sprocket wheel, 19, coacting with a silent chain, 20. The connection between worm wheel, 17, and its shaft is controlled by a clutch mechanism, 12, similar in all respects to the clutch mechanism, 12, on the main wheels, 10. Fixed to the Worm wheel shaft is a corrugated rubber roller, 21, adapted to carry the endless, drying mop, 22, which moves in the direction of the arrows shown in Fig. 3. The silent chain, 20, travels over sprocket wheels,'23, at the top, 24, at the bottom, and a sprocket wheel Fi 3). The endless mop, 22, extends over an 'is driven-by the corrugated roller, 21, and thereafter runs downwardly and around a corrugated rubber roller, 26,- on shaft, 25; thence horizontally beneath the transverse rubber rollers, '27; thence upwardly around transverse rubber rollers, 28 and 29; thence downwardly, within tank, 8,'and about the transverse tightening roller, 30; and thence upwardly between roller, 21, and the adjus able squeezing roller, 31; The pressure of the squeezing roll, 31, may be varied by the ad justing means, 32, shown in detail in Fig. 5.

Referring to Fig. 5 the squeezing roll, 31, is mounted upon a shaft, 33, which is supported in bearing, 34. This bearing, 34, is provided with a I longitudinally extending member, 35, passing loosely through the members, 36 and" 3?. The member, 36, is fixed to the longitudinal, threaded member, 38, passing loosely through the member, 37, which is riveted to the side of the case, 5, and which is provided with the adjusting nut, 39, abutting against the member,37'. EA portion of the case, 5, about the adjusting nut, 39, is cut away and backward movement of the adjusting nut is prevented by its contact with the edge, 40, of the opening in the case. Spring, 41, is provided whichis compressed between the member, 36, and the bearing, 34. From a consideration of the foregoing it will be apparent that by turning the nut, 39, the member, 38, and the member, 36, attached thereto, may be moved in a horizontal direction so that the compression on spring, 41, is varied. Thus, the pressure'on the mop as it passes between rolls, 21 and 31, is varied.

The bearings of the shaft upon which the mop tightening roll, 30, is mounted, are carried by the vertical sliding bars, 42. These bars, 42, are adapted to slide vertically in the bearing members, 43, which are secured to the side of the case, 5.,

Referring to Fig. 4 the rod, 42, is provided with a pin, 44, between which, and the bearing, 43, is compressed the spring, 45, tending to force the rod, 42, downwardly, thus keeping the mop, 22, under tension. The mop, 22, is held in contact with the floor by the action of the rollers, 27. These rollers are mounted upon transverse shafts runningin bearings carried by the rods, 47,. (see Fig. 7) which in turn are adapted to slide vertically in the bearings, 48, attached to th'e'side of the case, 5. To insure that the mop will be kept in contact with the floor, springs, 49, compressed between the bearings, 47 and the bearings for the rolls are provided.

The sprocket, 23, which is driven by the silent chain, 20, is secured to a transverse shaft carrying a corrugated rubber roller, 50, driving the endless mop, 51. This 'mop moves in the same direction as mop, 22, and 1 is carried about themain rollers, 52, 53 and 54. The mop, 51, is provided with a tighteningroller, 30, a squeezing roller, 31, and rollers, 27',all similar to like numbered members associated with mop, 22. The squeezing roller, 31, is also provided with an adjusting means, 32, similar to the adjusting means, 32, for the squeezing roll, 31.

Fixed to each end of the shaft, 25, which is driven by the silent chain, 20, are gears, 55, I

meshing with gears, 56, secured to shaft, '11, upon which are mounted the rear propelling and supporting wheels.

The shaft which carries the rubber roller, 50, and is driven by sprocket, 23, carries, at

its opposite end, a sprocket, 57, driving the silent chain, 58. The connection between sprocket, 57, and its shaft is controlled by a clutch mechanism, 12, similar in detail to the clutch mechanism, 12, on the main wheels.

The chain, 58, extends downward, as shown in Fig. 7 and drives a sprocket wheel, 59, secured to the transverse shaft, 60, (see Figs. 2and 3). Secured'to each end of the shaft, 60, are the gear wheels, 61, which mesh with thegears, 62, secured to theshaft'which carries the forward propelling wheels, 10. Thus, the propelling wheels,both front andrear. are driven by=the motor, 14.

the axial mountings, 90. 46

- igeeaecs (see Fig. 6). The gear, 64, drives ,the't ransverse shaft, 66,. carrying the bevel gears, 67 and'68 (for details. 'see'Fig. 13). The'bevelgears, 67 and '68,'-mesh withthe pinions, 69

and 70, secured to the vertical, hollow shafts, 71 and 72, respectively. The vertical shafts, I 71 and 72, are provided with the transverse bearing member, 73, at the top, and the hearing members, 74; and 75, at the bottom. -Telescoping within the hOllOW shafts, 71 and 72, are the vertical rods, 76 and 77, respectively, which are secured to the angularly disposed scrubbing brushes, 78 and 7 9. The rods, 76 and 77, areadapted to be turned by the-shafts, 711and 72, respectively, by means ofthe screws, 80, which project through the slots, 81, as shown in the shaft, 71. The'lower part of the hollow shafts, 71 and 7 2,'are provided with pins, 82, between which, and the tops of the brushes are compressed the helical springs, 83. These springs tend to keep the brushes in, contact with the floor. I

The gear, 65, is mounted upon a short shaft which also carries the sprocket wheel, 84, and the bevel gear, 85, (see Fig. 12 for details). The gear, 65, meshes with the small pinion, 86, which drives the revolving brush, 87.

' This brush, as viewed-in Fig. 3, revolves in a counterclockwise direction, is normally in contact with the floor, and brushes the dirt and dust from the floor into the transverse dustpan, 88. The dustpan, 88, is pivotally mounted in the sides of case, 5, as shownin Fig. 12, and the lower edge of the-dustpan is normally kept in contact with the floor by means of the helical springs,'89, surrounding Referring particularly to Figs. 8, 12 and 18, the bevel gear,'85, meshes with bevel gear, 91, mounted upon the longitudinal shaft, 92, which extends through the frontv end of the machine to receive gear wheel, 93; The gear,

n 93, meshes with and drives the gear, 94, on

the forward end of the machine, and this gear drives the short-shaft, 95, carrying sprocket wheel, 96. e The sprocket Wheel, 96, drives the silent chain, 97, which carries the dust conveyors, 98. The chain, 97, also runs over sprocket wheels, 99, 100 and 101, having fixed bearings, and over sprocket wheel, 102, mounted upon a vertical movable shaft, 103. The shaft, 103, may be moved up or down by means of the adjusting screws,101 and'l05,

which are threaded through the shaft nearits extremities, thus varying the tension on the dust conveyor chain. a 0

The dust swept up by the revolving brush,

87, is carried up on the dustpan, 88, and falls verted at't-he top'as shown in Fig. 18. In this position the dirt falls downwardly, as shown in Fig.3, and is collected in the'drfaw-" er-like receptacle, 107,"which may bewith-" drawn, as shown at 107 5 ,Fig. 3,and dumped. To prevent thedust frombeing thrown into the links of the conveyor chain, a thin guard plate, 200, is'provided, which is rivetedtothe; front plate, 3. The sprocket wheel, 8%, drives the silent chain, 108 which in turn drives a sprocket, 109, at the extreme front ofthe machine. The shaft,;-1=10, to which thesprocket, 109, is, attached, drives the front brush 111, through the crank, 112. The dotted circles, 111, and the dotted lines, 112, in Fig. 3, indicate different :lpositions zissumedby the brush and crank respectively. As the1nachine is 'propelledzov'er the fioor the eccen-; tri'cally mounted brush, 111, revolves, as shown, and sweeps comparatively large objects into the forward scoop or dustpan, 113, whichis hingedly connected to the front of the machine as at 1141.5 To prevent the scoop from catching upon projections from. the floor, it is supported on small rollers,'115, so that the front edge is raised slightly above thefloor. Referring particularly to Figs. 2, 3 and 13, I will now describe the automatic sprinkler means forunoistening thelfleor after it is swept by the revolving brush, 87 and before it is scrubbed by the brushes,'7 8 and 79.". EX tending transversely of the machine, at 'a' point comparatively near the floor] and between the sweeping brush'and the scrubbing brushes, is the perforated pipe, 116,,con-. nected tor the small receptacle, 117,"by the pipe, 1.18. J v Referring now more particularlyto Figs. 12, 15, 16, 17,18, 19 and20, forIthe particular details, and to Figs. 2 and 3 for thegeneral assembly, the shaft, 119, which isjdriven by the dust conveyor'ehain through sprocket, 100, carries the segmentalgear and cam, 120. Above, and, sli 'htly to one side of" shaft, 119, is shaft, 121, mounted parallel to shaft, 119, and carryingthe gear-wheel, 122, adaptedto mesh at certain times with-the segmental gear, 120. The number of teeth in the segmental gear, 120, should be SLlffiClQIll? to revolve the dipper arm, 123, and dipper, 12 1-.

6 through the angular distance shownrin Fig.

15. "The dipper, 124, is simply a hollow cylinder provided with an opening, 125, in the top, through which water may enter when it is submerged, and which is connected through the hollow dipperarm, 123, to the shaft, 121. The shaft, 121, from its extremity within the receptacle, 117 ,to the point of connection of the dipper arm, 123, is hollow, as shown at 126,in Fig. 12 so that water may'fiow'from dipper, 124, into receptacle, 117 The force 7 of gravity assisted by the helicalspring, 127, -(see Figs. 2" and 3) tends to maintain the position shown at125' in-Fig. 15. 1 The water from the dipper flows down the hollow arm, 123,-into the hollow shaft, 126, and out'into the receptacle,-117, and thence throughpipe, 118, to the sprinkler, 116. In order that the dipper, 124, may be held in the position shown at 124 in :Fig. 15, "for a sufficient length of time to empty the water therefrom" into receptacle,' 117, Lprovide the following described means. Astheshaft, 121,- is turned, the point of screw, 1.29, coacting with the-helical slot in thesh'aftprod'uces alongitudina'l movement of the shaft, 121, tending to laterally disengage: gears, 122 and 120. Referring to Figs. 15, 16 and 17 when the last tooth on the segmental gear, 120, has passed out of engagement with the teeth on gear, 122, the shaft, 121, has; moved toward the front of the machine and occupies'the position shown in Fig. 17. Here, the side-of gear, 12:2,is frictionally engaged by the side of projecting rim, 132, ofthe-segmental gear which holds the dipper in the position, 124 until the projectingrim, 132,'has passed beyond the range of the side of gear, 122. To facilitate an easy transition of gear,'122, from the teeth on gear, 120, to the rim, 132, the edge of the rim, 132, adjacent the teeth is beveled, as shown at 133. By withdrawing the point of screw, 129, from its engagement with the helical slot, 131, in shaft, 121, the shaft, 121, may be pulled forwardly a sufficient distance by grasping knob, 134, topermanently disengage gears,120 and 122, thus throwingthe dipper out of operation. r I

Referring to Figs. 2and 7,'if for any rea: son the mechanism operating the. dipper should break, I providejthe valve, 135, operated by the hand wheel, 136, at the front of the machine for admitting water from tank, 6, tothesprinkler, 1 16, through-pipe, 137 (-see "Fig. 7).

' 'Suitablyniountedupon the top of the machineis the water storage tank, 138,-havinfg a filling cap, 139, and provided, if'desired, with a gauge, 140, adapted to indicate the quantity of water in the tank. Thetank, 138,

i is provided with'cocks. 141, 1'42'and 143 located respectively over tanks,-6, 7 and 8.

wherebyithey' may be readilyfilled with fresh water. i V i 'Thetank, 9, is' a drainage tank through which the dirt and water -collecting-in tanks,

represents either one of the axles, 11, the

shaft ofthe worm gear, 17, orthe shaft for the sprooket,;57. 4149, represents either the hub of'one; of'the rubber tired wheels, 10, the hub of the worm gear, 17, or the hub of the sprocket, 57 Looselymounted upon theend of the shaft, 148, is the manipulating button, 150. This button is hollow and is adapted to enclosethe helical spring, 151, compressed between the washer, 152, on the end of shaft. 148', and the inside of the manipul'ating'button, 150. The shaft, 148,1is provided with the annular recess, 153. into which projects screw, 154,threaded into the hub of the 'wheel. Thecoaction of screw, 154, andrecess, 153, prevents lateral movement of the wheel on the sha'ft-but-permits the wheel to rotate freely. The inner face of-the-manipulating button,150, is provided withtwo projections, 155 and 156. The projecti0n,-155, is adapted to coact with a complementary recess, 157, provided. in the hub of-the wheel, andthe projection, 156,-is adapted to coact either with a comparatively deep complementary recess, 158, in the shaft, (best shown in Fig. 9) or witha comparatively shallow complementary recess,l159, which is also in the shaft but spaced from recess, 158.

lVhen theparts are in the relative position shown in Fig. 9, projection, 156, is meeting with recess, 159, and thewheel may be turnedindependently of the axis. When the parts are inthe relative position shown. in Fig. 10, projection, 155, is'coacting with recess, 157, in thehub, and projection, 156,'is coacting-with recess, 158, in the shaft thereby locki'ng the wheel and shaft together.

Referring particularly to Figs. 1, 2, 18, 21-. 22 and23, in orderthat the cleaning mechanism may be easily raised from the floor, I provide near the front of the machine and at each-side-thereof wheels, v160 and 161, and at the rear of the machinea singleyswivelmounted wheel, 162. These wheels ,may be raised andlowered by the-;n1echanis1n hereinafter describedandby means of which the entire 'inaohine'may be lifted oil of the rubber tired wheels, 10, and be supported upon the wheels, 160, 16 1 162. Extending longitudinally ofthe'machine and just within the outer caseare the bars, 163, which are pivoted to the-outer case near the front and bottom thereof as shown at-l64. Th'ese'bars wheels, 160 and 161. through vertically slotted openings in the of the outer case.

extend through the slots, 165, (see Figs. 21

and 22) in the rear of the outerflcase and are connected at therear end of the machine by the bar. 166. Near the pivots, 16 1, short 'vertical bars, 167 (see Fig. 18) arepivoted to the bars, 163,- as shown at 168, and these vertical bars'carry the axles, 169, for the These axles pass outer case so that as the bars, 163, are moved vertically about the/pivots, 16 1, the wheels,

160 and 161, are moved accordingly.

Referring now more particularly to Figs.

21, 22 and 23, secured to the bar, 166, is a plate, 170, provided with two depending por- "tions,'171-, having rollers,;17 2, at their lower 'ed to coact with the bolts or. latches, 176, are

the racks, 177. Secured to the U shaped bar, 17 4, at its center, is thefoot pedal, 178, which .maybe depressedv to withdraw the extremities of the bolts or latches fromthe racks, 177 The foot pedal, 178, is normally held in the position shown in Figs. 22 and 23 by the tension spring, 179, so that the latcheslare :normally held engaged with the racks, On account of the's'hape of the, rack teeth it will be obvious that the plate, 17 0, with itsattachedparts maybe moved'downwardly without releasing the engagementofthe latches and racks, thus moving the bars, 163, downwardly about their pivoted extremities and lowering the wheels,'160 and 161. To raiseithe'bars, 163, it will be necessary to depressthe pedal, 178, so that the latches are disengaged from the racks.

' The rear end of the outer case, at its center, is provided with a vertical slot, 180.

Resting against the outer rear side of the casin g,'and adapted to'slide vertically relative to said casing is the plate or bar, 181, to' which T is attached thewheel,162, swiveled at 182.

bolts, 183 and 184:,which pass through'the The bar, 181, is held in sliding engagement with therear end of the outer case by the rear end of the casing.

Pivoted to the inner rear side of'theouter casing, as shown in Figs. 21 and 23 are the arms, 1851 Pivoted to the arms, 185, are the cross-arms, 186, pivotally connected to- I I gether, where they cross, by the bolt, 18%, and

pivotallyfconnected at the top by the tra nsverse bar, 187 It will be apparent from a reference to Fig." 21 that the bars, 163, rest upon and are normally supported by the transversebar, 187.

' When theplate, 170, is forced downwardly, it also forces the transverse bar,'187, downwardly and this in turn forces the Wheel, 162, downwardly-by the coaction of the cross-bars, 186, and the bolt, 184. 'When theparts are in the relative position shown in Figs. 22 and 23, the transverse bar,187, will be in the position indicated by 187,

the cross-bars in the position indicated by 186T,

the bars, 185, will move outwardlyto the position indicated at 185, and the bars,-163,'

'will bemoved downwardly to the position indicated by 163.

When the parts are in the relative position shown in Figs. 22 and 23,1the propelling wheels, 10, will be lifted from the floor and the machine will rest upon the outside, forward wheels, 160 and 161, and the swiveled, rear wheel, 162. It will be obvious that when the machine is supported on these wheels the cleaning mechanism is lifted from the floor and the swiveled supporting wheel at the rear about in any direction.

While I have shown no controlling inechanism for the electric motor, nor any connect1ons therefor, it is to .be understood that such controlling mechanism and connections 'may beprovided at any convenient point. 7

In operation, my machine may be propelled over the fioorby the electric motor which is operatively connected to the driving associated witheach wheel, ;or itfmay be propelled by hand through the handles, [188. When propelled by hand,the clutches, 12, associated with the wheels, 10,,are adjusted to the position shown in "Fig;, 9,so that the wvheels,10,- may turn freely on their axles,

In this latter case, the cleaning, mechanism 'may still be operated by the electric motor provided the clutch, 12, associated with the worm gear, 17 is left engaged.

In. comparatively small machines or in machines ;which embody a portion only of the cleaning mechanism disclosed in my complete device, or in other case, it may be desired to both propel the machinefand operate the cleaning mechanism by hand. In this case,

the motor may be dispensed with and the driving wheels, 10', adapted to turn the axles to which they are affixed, thusdriving the cleaning mechanism. Where it is desired to both propel and. drive the cleaning mechanism of a motor equipped machine, such as herein described, by hand, the clutches, 12, associated with the wheels, 10, may be adusted so that the wheels will drive the axles,

and the worm wheel, 17 may be disconnected from its shaft bythe clutch, 12.'

As progresses,comparatively large ob jects-such cigar butts,'wads of paper, etc.,

are caught-= by the eccentrically mounted will permit the device to be readily swung 9 I brush, 111, and swept into the scoop,113.

WVhere such an object is, intercepted'by the .front edge ofathe'scoop and thebrush, 111,

is; in one of the positions shown at 111,-in

Fig. 3, the object will be pushedalong the floor, by the edge of the-scoop until thebrush approaches the position shown in 111, whereupon the; object will be swept into the scoop. The brush, 87, revolves at comparatively high speed so that the fibers thereof in contact with the floor move toward the dustpan, 88. .The dust is carried up over the dustpan and falls into the driven conveyor where it is carried upwardly and dropped into the dirt receptacle, 107. When the dust isremoved from the floor by the brush, 87, the floor is in contact with the floor.

immediately sprinkled with water. It is important to note here thatwhen, for any reason the progress. of the machine is stopped,

the dipper, 12 1, will cease to operate and no water will be delivered to the sprinkler. After the floor is sprinkled, it is thoroughly scrubbed by the revolving brushes, 78 and 79,-which turn at comparatively high' speed This operation loosens all dirt which may be adhering to the floor and which was not picked up bythe .7 brushes, 111 and 87, but leavesthe dirty water on the-floor. Following the scrubbing proc ,ess' is thefirst mop, 51, which moves in the 7 direction of the arrow shown inFig. 3 and is held in contact with the floor-by the spring depressed roller, 27.

This-mop efiec'ts a rough drying operation absorbing most of the water and dirt which is carried upwardly i into tank, 7. The tank, 7 iskeptpartially full ofwater which washes the dirt from the mop as it passes througlnand theexcesswater in the mop is removed by the squeezing roll, 31'. Following the first mop is the second mop, 22, which practically completes the drying operation,;and the dirt-collected-by this mop is washed out and deposited in tank, 8, and the surplus water removedfrom the'mop by the action of thesqueezing roll, 31.

The dustpan, 88, is provided with a rather sharp lower edge, and inasmuch. as thisedge is-normally held in contact with the floor by the springs, 90, it might be seriously damaged or even torn from themachine by any backward movement thereof. For this reason I have provided the ratchet wheel, 189, (see 'Figs. .12 and 14) whichis mounted on the shaft carrying sprocketwheel, 8 1, gear wheel,

65, and bevel gear, 85. Pivotally secured to the'sideof'the case is thepawl, 190, which is held in operative engagement with the teeth of the ratchet by spring, 191. The coacti'on of the pawl and ratchetwill preventbackward movement of the machine; a

From: theforegoing it will be apparentthat I have provided a-machineiwhi'ch will, -in one passage over a given surface'of'fioor jcompletelyclean tl1esame; It'is to be under- StOQCLllOWBVGI, that I am, not limited to the dipper from the tank.

precise details herein described and illustrated in the drawings, nor to amachine per forming all of the functions herein set forth. For example, a machine having only a front scoop with an eccentrically mountedzbrush for collecting comparatively large objects would be valuable apart from any other elements, and the combinationaof an eccentrically mountedbrush 'coacting'with scoop for collecting large objects,and a rotating brush for collecting dust, would formar sweeping machine of some considerable Value. In otherwords, many subcombinationsof elements, described and illustrated would, in themselves, prove extremely useful. therefore to be understood that thewords which I have used in describingimy invention are words of description ratherjthan words of limitation, and that changes-within the It is purview of theappended claims may be made without departing from thetrue scope and spirit of my invention. i

What I claim is r 1. In a fioor cleaning machine of the character describechthe combination withmeans' for collecting comparatively large objects and comprising a revolving brush and'means for periodically elevating, from and a lowering the brush to the floor, of means for 001- lecting small particles ofdirt'and comprising a revolving brush in continuouscontact Evith the floor and behind said first mentioned rush.

2. In afioorcleaningimachine including a bination with meansfor propelling, said machine, ofasprinkler pipe adapted to spray water over the floor, and a dipper,oscillated by the propelling means, for dipping water from thereservoir and delivering itto the sprinkler, a .7 i 3, In. a floor cleaningmachine, the combination iwith a tank. adaptedito contain water, of a movable dipper adapted to raise water-from said tank, a spri'nkler head com-'= reservoir adapted to contain water, the com- 3710 tank and spaced from but communicating" with said hollow shaft through a hollow arm connecting the two together, agear on said hollow shaft,1fa second shafthavinga seg mental gearthereon coacting with said first mentioned gear, and means for driving, said last mentioned shaft to periodically raisethe 5. In a-floor cleaning machine, the combination with a tank adapted to contain water, ofa-movable dipper adaptedto -raise Lil) water from said tank, and means for raising said dipper from said tank; said last mentioned means including means for temporarily sustaining said dipper in raised position.

6. In a floor cleaning machine, the combination with a plurality of tanks adapted to contain Water for Washing the dirt from a plurality of belt mops driven through said ater, of a tank adapted to receive the drainage from said first mentioned tanks, and a tank adapted to contain a supply of fresh xiz ater for replenishing said first mentioned tanks by gravity.

CHARLES PICKER.