US2011261A - Carpet sweeper - Google Patents

Description

Aug. 13, 1935. E w EN 2,011,261

CARPET SWEEPER Filed Jan. 8, 1932 INVENTOR TTORNEYS Fred W Fu/fegz Patented Aug. 13, 1935 UNITED STATES CARPET SWEEPER Fred W. Pullen, Grand Rapids, Mich., assignor to Bissell Carpet Sweeper 00., Grand Rapids,

Mich.

Application January 8, 1932, Serial No. 585,421

I 9 Claims.

The objects of the invention are:

First, to provide an improved spring structure for applying pressure to the Wheels'in the broom action.

Second, to provide in such a structure an improved arrangement of equalizing means for the spring and floor wheels.

- Third, to provide such a structure which can I be made as a unitary device for attachment to Fig. 1 is an end elevation of a carpet sweeper embodying the features of my invention, the buffer band and bumper corners being omitted. Fig. 2 is anelevation view of the detached spring and equalizer unit looking from the inside out, the floor wheels being omitted.

Fig. 3 is a detail plan View of the unitary structure with the wheels present.

Fig. 4 is a detail plan View of the end bar,the spring support and slideway, the spring, the slide, the equalizing levers, journal pins, fulcrum pins, floor wheels, and the floor wheel axles in separated relation. I

Fig. 5 is a detail sectional elevationon line 55 of Fig. 2, showing theswiveling action .of the spring in its holder.

The parts will be identified by their numerals of reference which are the same in all the views.

I is the carpet sweeper case. 2 is the handle bail and 3 is the bail pivot plate secured to the end of the case. 4, 4 are the projecting side bars of the case. 5 is the deflectable end guard bar of thin metal having extensions 5|, 5| at each side for attachment to the side bars 4, 4 of the case. The usual deflectable end guard bar is spaced from the end of the case to house the floor wheels and equalizer structure.

6 is the spring support suitably riveted to the guard bar and having a vertical slideway 6| formed at the center. I is the spring retained by clip parts 62. 62 on the spring support 6, so that the same pivots freely therein axially. Central offset H of spring I is disposed between the clips 62, 62 and effectively locates the spring centrally of its support. The support 6 is curved slightly inwardly toward the end of the case.

8, 8 are the floor wheels supported on floating axles 9, 9 supported in enlarged apertures in the end walls of the case in the usual manner. Equalizing levers l0 and H slotted at It", and.

.I I l, are carried by the guard bar 5, being supported by fulcrum pins l2 and I3 which are shouldered and serve also as the connecting rivets for securing the spring support 6 to the guard bar 5. Transverse journal pins I4 and I5 are secured to the outer ends of the levers and engage bear.- ings in the'hubs 8|, 81 of the floor wheels 8, 8. The inner ends of the levers l0 and II contain slotted holes and cooperate with the shouldered brush journal pin 16 which iscarried on the slide H to which it is riveted. The projecting end of the rivet extends into the vertical recess 52 formed by a vertical indentation at the center of the guard bar 5.

Ball bearings in suitable casings l8 embrace each of. the hubs. 8|, BI and are provided with spring connecting, arms I9, I9 which are engaged by offset ends 12, 12 .on the spring 1. 20 is the brush, the hub of which is engaged and driven by the floor wheels.

From this description it will be readily seen that when pressure is applied to the carpet sweeper by its operating handle, the floor wheels will yield in equalized relation, due to the presence of the equalizing levers, the spring will act very freely because of its pivotal support at the center, and a very smoothly operating carpet sweeper is thus secured. The pivoting of the spring is indicated diagrammatically in Fig. 5.

The spring and equalizer assembly is unitary with the end bar, greatly facilitating its manufacture and making. it. very convenient to"as-.

semble into the completed carpet sweeper. The brush is removable in the usual way by deflecting the thin metal end bars 5 outwardly until the brush pivots are withdrawn.

In this behalf I use the word equalize in the sense defined in The Century dictionary as meaning that which equalizes or makes equal.

My improved structure is capable of very considerable modification while still embodying valuable features of my invention. It is highly effective in its specific form. I desire to claim the specific features of the structure as I have described them in their special relations and I also desire to claim the organization and combination broadly as pointed out in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a carpet sweeper having at each end a bearing carried by a vertically movable slide, a brush pulley mounted on said bearing, floating floor wheels at each side of and frictionally engaging said brush pulley, and levers each engaging said movable bearing and the hub of one of said floor wheels; an end member comprising a thin deflectable end bar of uniform cross-section and a center plate secured on the inner face thereof, said center plate having a parallel sided vertical slot therein forming a guide for said slide and an upper portion curled into a horizontal tube adapted to rotatably support a rod spring pivctally connected to said floor wheels.

2. In a carpet sweeper having at each end a bearing carried by a vertically movable slide, a brush pulley mounted on said bearing, floating floor wheels at each side of and frictionally engaging said brush pulley, and levers each engaging said movable bearing and the hub of one of said floor wheels; an end member comprising a thin deflectable end bar of uniform cross-section and a center plate secured on the inner face thereof, said center plate having a parallel sided vertical slot therein forming a guide for said slide and an upper portion supporting a red spring connected to said floor wheels.

3. In a carpet sweeper having at each end a bearing carried by a vertically movable slide, a brush pulley mounted on said bearing, floating floor Wheels at each side of and frictionally cngaging said brush pulley, and levers each engag ing said movable bearing and the hub of one of said floor wheels; an end member comprising a deflectable end barand a center plate secured on the inner face thereof, said center plate having a vertical guideway therein for said slide and an upper portion curled into a horizontal tube adapted to rotatably support a rod spring pivotally connected to said floor wheels.

4.. In a carpet sweeper having at each end a bearing carried by a vertically movable slide, a brush pulley mounted on said bearing, floating floor wheels at each side of and frictionally en-' gaging said brush pulley, and levers each. engaging said movable bearing and the hub of one of said floor wheels; an end member comprising a deflectable end bar and a center plate secured on the inner face thereof, said center plate having a vertical guideway therein'for said slide and an upper portion supporting a spring connected to said floor wheels.

5. In a carpet sweeper having at each end a brush pulley, a guide member rotatably engaging saidbrush pulley, floating floor wheels at each side of and frictionally engaging said brush pulley, and equalizing levers each engaging said guide member and the hub of one of said floor wheels; an end member comprising a thin deflectable end bar and a center plate secured on the inner face thereof, said center plate having a parallel sided vertical slot therein forming a guide for said guide member, and an upper portion curled into a horizontal tube adapted to rotatably support a rod spring pivctally connected to said floor wheels.

6. In a carpet sweeper having at each end a brush pulley, a guide member rotatably engaging said brush pulley, floating floor wheels at each side of and frictionally engaging said brush pulley, and equalizing levers each engaging said guide member and the hub of one of said floor wheels; an end member comprising a thin deflectable end bar and a center plate secured on the inner face thereof, said center plate having a parallel sided vertical slot therein forming a guide for said guide member, and an upper portion supporting a rod spring connected to said fi'cor wheels.'

7. In a carpet sweeper, the combination of a case having extended side bars and a thin deflectable metallic end guard bar, a central upwardly and inwardly curved spring support carried by the end bar, a removable floor brush disengageable by the deflection of said end bar, floor Wheels supported by suitable floating axles to drive said brush, bearing members surrounding the hubs of said wheels and each having a projecting spring arm for spring connection, and a rod spring pivotally supported by the said spring support so that it may pivot axially and having its ends engaging said spring arms.

8. In a carpet sweeper, the combination of a case, a deflectable end bar, a central spring support carried by said bar, a removable floor brush disengageable by the deflection of said end bar, floor wheels supported by suitable floating axles to drive said brush, and a straight rod spring pivotally supported by the said spring support so that it may pivot axially with its ends connected to supply pressure to the floor wheels.

9. In a carpet sweeper having a brush with brush supporting slide, the combination of the deflectable thin metal end guard bar and a central spring support fastened to and. carried by the said guard bar and provided with a vertical guideway for the brush supporting slide;

FRED W. PULLEN.

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