US993767A - Carpet-sweeper. - Google Patents

Description

J. W. DU LANBY.

CARPET SWEEPER.

APPLICATION FILED AUG. 17, 1909.

Patented May 30, 1911.

3 BHEETS-SHEET 1.

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CARPET SWBEPER.

APPLICATION FILED AUG.17, 1909.

993,767. Patented May 30,1911.

3 SHEETS-SHEET 2.

J. W. DU LANBY.

CARPET SWEEPER.

APPLICATION FILED AUG. 17, 1909.

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JA MES DU LANEY, OF TORONTO, ONTARIO, CANADA.

GARPET-SWEEPER.

To all whom it may concern:

Be it known that I, JAMES W. DU LANEY, a citizen of the United States, residing at Toronto, in the Province of Ontario and Dominion of Canada, have invented new and useful Improvements in Carpet-Sweepers, of which the following is a specification.

The invention relates to an improvement in carpet sweepers, being particularly directed to a construction in which the various surface contact parts are arranged for independent movement, so as to accommodate themselves to the irregularities of the surface, and in which the wear of the brush can over which they are traveling and with respect to the cooperating means for driving the brush.

The invention will be described in the following specification, reference being bad particularly to the accompanying drawings, in which Figure 1 is a view in side elevation, partly broken away, of the improved carpet sweeper. Fig. 2 is a broken bottom plan of the same one of the dust ansbeing broken away. I ig. 3 is a side elevation illustrating particularly the means for manually adjusting the brush. Fi 4 is a section on line 44 of Fig. 3. Flg. 5 is a broken sectional view, showingthe means for mounting the brush ends. Fig. 6 is a sectional perspective view of a portion of the casing showing the manner of mounting the pan thereon. I

Referring particularly to the accompanying drawin s, wherein is shown the preferred detai s of construction, the improved carpet sweeper comprises a casing 1 of the form illustrated, the endsof the casing being closed by end walls 2, and the bottom of the casing being open. Each end wall at a point about centrally of its length is formed with a vertically extending opening 3 in which is arranged a sliding bearing for the brush. With reference more particu- Speoiflcation of Letters Patent.

Application filed August 17, 1909. Serial No. 513,211.

Patented May 30, 1911.

larly to Fig. 5 it will be noted that said beyond the opposing surfaces of the end Wall through slots 5 therein, which slots are coextensive in length with the length of the openings 3 but have a less width than the diameter of said openings. The inner or headed end of each sleeve 4 is seated in a recess 6 formed in the end of the cylindrical body 7 from which brush bristles 8 radiate. A tie plate 9 is secured on the end of the body 7 with a central opening corresponding to the diameter of the sleeve 4, said plate when in place overlying the head of the sleeve and securing the latter in position. Within the opening 3, which is circular in cross section, is arranged a bearing including a lower block 10 and an upper block 11, the adjacent faces of which blocks are each formed with a semicylindrical depression so as together form an opening or bearing for the sleeve 4. The upper block 11 is formed on its upper surface with a vertically extending stud 12 to receive the lower coils of a spring 13, which at its upper end bears against the upper wall of the opening 3 while the lower block 10 is formed adjacent its lower end with an outwardly projecting pin 14;, which projects through the slot 5 on the outer surface of the end wall, for a purpose which will wall in both directions beyond the brush.

support is formed with arcuate slots 17, and in each pair of slots alined transversely of the sweeper is mounted a rod or shaft 18. The shafts extend beyond the relatively outer surfaces of the end walls and are provided with friction wheels 19, mounted loosely upon the ends of the shafts and serving as surface wheels to be driven in the movement of the sweeper over the surface. The wheels 19 are preferably provided with friction or rubber tires and are so relatively arranged as to engage the surface of the friction roll 15 of the brush, so that in the movement of the sweeper the brush is revolved. Each end wall, on each side of the opening 3, is formed with a diagonally arranged opening 20, which inclines upwardly and outwardly relative to the opening 3 and terminates at its upper end in coincidence with the particular slot 17. Vithin each of these openings is arranged a coil spring 21, secured at the upper end to the shaft 18 and held against upward movement at its lower end by a cross pin '22 fitted in slots in the wall of the opening. The springs are normally under tension and operate to hold the shafts 18 at their limit of movement toward the opening 3, or in other words to hold the surface wheels 19 into desired frictional contact with the brush roll 15. '01)- positely located refuse or dust pans 23 are mounted between the end walls,'the mouth or receiving ends of said pans being directed toward the brush and terminating slightly beyond the effective sweep thereof. Each pan, which in form comprises a flat plate of the desired size having upturned side edges, is provided with pins 24 which project beyond the rear or outer ends of the side walls and are normally arranged in recesses 25 formed in the lower edges of the end walls. At a point slightly in rear of the inner or forward ends, each refuse pan is provided with a laterally projecting pin 26 designed to seat in a slot 27 formed in the end wall, said slot communicating with an opening 28 formed in each end wall from the lower edge thereof. lVithin the opening 28 is arranged a coil spring 29 designed to bear upon the pin 26, a staple member 30 bridging the opening at its mouth to prevent the pin from being forced therefrom. By this construction it will be understood that the forward or inner edges of the refuse pans are .designed to bear at all times upon the surface over which the sweeper is traveling, and that this condition is maintained by the tension of the springs 29. However, said springs permit an upward yielding of the pan, thereby providing a means whereby the pan will automatically accommodate itself to the irregularities of the surface over which it is traveling.

Each pin 24 of each pan is connected to a link 31, which in turn is connectedto a lever 32, pivotally mounted upon the respective end walls at 33. One of the levers of each pan, preferably the relatively opposing levers, is extended beyond the pivot 33, as at 34, to'overlie the upper surface of the casing, and are provided with laterally pro-' ected foot pieces 35. By this construction a pull upon either foot piece will depress the relatively outer or rear ends of the pans, rocking them upon the pins 26, as a pivot, and, thereby discharge the contents of the pan as desired. Mounted upon each end wall is an adjusting lever 36, pivotally connected at one end to the end wall and formed at the oppositeend with a laterally projected foot piece 37. The lever is formed with an opening 38 to receive the stud 14 of the lower block of the brush bearing, and at a point adjacent the foot piece is provided with a vertically extending plate section 39, designed to overlie a spring latch plate 40 secured to the end wall. The latch plate is formed with'a tooth 41 and the plate 39 of the lever formed with a series of correspondingly shaped grooves or recesses 42, so that" the lever may be adjusted and held at any desired elevation. By this means the wear of the brush may be compensated for or any desired pressure between the brush and the surface over which it is traveling may be secured. Protecting strips 43 are secured to the ends of the casing 1 and overlie and protect the surface wheels 19 and brush wheel 15, as shown in Fig. 2 of the drawings.

The sweeper is provided with the usual yoke member 44 pivotally mounted on the end walls and formed inany suitable manner to receive the handle. The yoke member at its pivot sections is preferably squared at 45 and designed to bear upon the end of leaf springs 46 secured to the end walls of the sweeper, whereby to maintain the yoke n or-- mally in vertical position while permitting any manual tilting thereof when desired.

From the above description it will be understood that the brush, surface wheels and refuse pans may readily and automatically accommodate themselves to any irregular1-. ties of the surface over which they are traveling, that the ground wheels will automatically maintain the desired friction with the brush rollers to insure the most effective operation of the brush; and that any wear of] the brush can be compensated for or any desired pressure of the brush on the surface being treated secured by the adjustment of the levers 36.

walls,- a revolving brush member supported by the .casing and provided with friction rolls which are interposed between the surface wheels on the shafts, said end walls being formed with openings extending through the lower edges thereof and terminating in coincidence with the respective slots, said 7' openings inclining from the slots toward the vertical central line of the end walls, and

springs mounted in the openings and connected to the shafts, the said springs having their lower ends fixed to the end walls of the casing, and the said shafts being arranged in parallel spaced relation with each other so that under normal tension of the springs the shafts are moved toward each other to cause the surface wheels thereon to frictionally engage the friction rolls on the brush.

2. A carpet sweeper comprising a casing, a revolving brush member therein, friction rolls supported by the brush member, a pair of shafts movably mounted in the side walls of the casing, loose friction wheels on each shaft, the said brush member being arranged immediately between the said shafts and havingits friction rolls frictionally engaged with the said surface wheels, and springs fixed at their lower ends to the walls of the casing at points inwardly of the said shafts,

the said springs having their upper ends fixed to the shafts so that under the influence of the springs the surface wheels are yieldingly engaged with the friction rolls of the brush member. 7

3. A carpet sweeper comprising a casing,

a revolving brush mounted therein, the said casing being open throughout its bottom, a. pan underlying the bottom of the casing at one side of the brush member and pivoted near its inner end to the side walls of the casing, springs supported by the walls of the casing and bearing against the pivots of the pan to hold the intake end of the pan yieldingly engaged with the surface against which the brush member is in contact, the end wall of the casing closing the rear end of the said pan, the said pan having its side walls formed with alining slots, pins extending from the sides of the pan and normally extending into the said slots, and controlling levers operatively connected with the pins of the pan to move the pan to a discharge position.

In testimony whereof I afiix my signature in presence of two witnesses.

JAMES W. DU LANEY.

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