US2180060A - Carpet sweeper - Google Patents

Description

Nov. 14, 1939.

J. M4 KENYON CARPET SWEEPER Filed Feb. 23, 1938 1 2 Sheets-Sheet l l g. e

Nov. 14, 1939. ,LVM KENYON 2,180,060

CARPET SWEEPER Filed Feb. 23, 1958 2 Sheets-Sheet 2 lNVENTOR. Fig. 9. M /felzya/z.

Patented Nov. 14, 1939 PATENT OFFICE CARPET SWEEPER James -Maxwell Kenyon,` Accrington, England,

assignor to Entwisle crington, England & Kenyon Limited, Ac-

Application February 23, 1938, Serial No. 192,011 f In v(frreat Britain March 18, 1937 1 Claim.

This invention relates to improvements in carpet sweepers of the type in which each wheel is Vmounted on a separate `stub axle carried by a spring attached directly or indirectly to the sweeper casing whereby the wheel is resiliently mounted in relation to the casing, such stub axle being either hollow and having a pin afxed to the wheel rotating therein or solid and having a sleeve aiixed to the wheel, rotating thereon.

The axles for the floor wheels of a carpet sweeper usually pass from end to end of the sweeper casingA above vthe dust pans but it is hereby-proposed to mount each wheel on a separate stub axle which is carried by, but does not project through the end of the casing, such stub axle being capable of limited movement in any direction in a vertical plane but being restrained from endwise movement.

This manner of mounting each wheel on a separate stub axle has the advantage that it avoids the use of axles passing through the casing from end to end thereby preventing the accumulation of hairs, cotton, uffs, and the like on the axles and also permitting the dust pans easily and completely to be removed from the sweeper casing for the purpose of discharging the dirt and litter collected therein by the operation of the machine.

According to the present invention'each wheel of the sweeper comprises a disc formed with inwardly extending anges on its periphery which form a casing to enclose the stub axle and its supporting spring.

The invention will be described with reference to theaccompanying drawings in which:

Fig. 1 is an end view of a carpet sweeper showing one form of the invention applied thereto, the wheels and brush being indicated in broken lines.

Fig. 2 is an end view of the bearing shown in Fig. 1 drawn to a larger scale.

Fig. 3 is a section on line 3-3 Fig. 2.

Fig. 4 is an end view of a modied form of bearing.

Fig. 5 is a section on line 5-5 Fig. 4.

Fig. 6 is an end View of another modification of the bearing.

Fig. '7 is a section on line 1-1 Fig. 6.

Fig. 8 is an end view of another modication of the bearing.

Fig. 9 is a section on line 9-9 Fig. 8.

Fig. 10 is a section of another modification of the bearing.

In the form of the invention shown in Figs. 1 to 3 the hub a of each wheel A is affixed to or formed integrally with a short axle B which projects inwardly from the hub a towards the end of the casing C of the machine. The short axle B rotatesin -a iioating bearing D carried in a loop e at one end of a spring E the vother end e1 of whichvis affixed to a projection f on a plate F secured by screws f1 or in any other suitable way to the end of the casing C. Instead of the end e1 of the spring E being aixed to the plate F it may be secured directly to the end of the casing C. The axle B and wheel A are prevented from moving longitudinally away yfrom the end ofthe casing C by the usual end iron or strap c.

In the form of the invention shown in Figs. 4 and 5 the hub a of each wheel A is afxed to or formed integrally with a short axle B which projects inwardly from the hub a towards the end of the casing C of the machine. The short axle B rotates in a floating bearing D carried vin a central loop el in a curved or bowed spring E, the ends e2, e3 of which are afxed to projections j on a plate F secured by screws f1 or in any other suitable way to the end of the casing C. Instead of the ends e2, e3 being aflixed to the plate F they may be secured directly to the end of the casing C. The axle B and wheel A are prevented from moving longitudinally away from the end of the casing C by the usual end iron or strap c.

Instead of the bearing D being supported at the centre of a single bowed or curved spring E it may be carried at the ends of two or more curved springs the other ends of which are anchored to the plate F or to the end of the casing C.

In the forms of the invention shown in Figs. 6 and 7 and in Figs. 8 and 9 the hub a. of each wheel A is aixed to or formed integrally with a short bearing D1 which projects inwardly from the hub a towards the end of the casing C. The short bearing D1 is rotatably mounted on an axle B1 projecting outwardly from a plate G connected by a spring E to a second plate F secured by screws f1 or in any other suitable way to the 45 y end of the casing C, the spring being aixed at one end e4 to a projection y on the plate G and at the other end e5 to a projection f on the plate F. The projection g on the plate G may be at the top of the plate G as shown in Figs. 6 and '7, 50

' ing C. The wheel A and short bearing D1 are 55 prevented from moving longitudinally away from the end of the casing C by the usual end iron or strap c.

Fig. 10 shows the invention applied to a carpet sweeper of the type having a metal wheel cover H which encloses the wheels A either wholly or partially. In the construction the hub a, of each wheel A is ailixed to or formed integrally with a short axle B which projects outwardly from the hub a towards the wheel cover H. The short axle B rotates in a oating bearing D carried in a loop e5 at one end of a spring E2, the other end efi of which is secured to a projection f3 on a plate Fl riveted or otherwise aixed to the inner surface of the wheel cover H, the springs E2 being of similar shape to the spring E shown in Figs. 1 to 3. Alternatively the short axle B may be carried in a loop in the centre of a spring allxed at both ends to the plate F as shown in Figs. 4 and 5. Instead of the spring E2 being ailxed at one end or at both ends to the plate F it may be afxed directly to the wheel cover H.

In an alternative construction for carpet sweepers having wheel covers such as H the short axle may be carried by a plate connected by a spring to the plate F or to the wheel cover H and the bearing may be aiixed to the hub of the wheel, such construction being analogous to that described with reference to Figs. 6 and 7 and Figs. 8 and 9.

In all the diierent forms of the invention hereinbefore described the floating bearing D or the floating axle BI carried by the spring or springs E is normally arranged centrally in relation to the width of the rim of the wheel and length of the hub in the space within the rim so that when the wheel is in driving Contact with the brush pulley the axes of the wheel A and brush K are parallel.

Moreover the spring E is curved or shaped so that a relative movement in any direction in a vertical plane can be obtained between the wheels A and the casing C when the wheels are in contact with the surface being cleaned and pressure is applied to the casing through the operating handle, and allow the necessary pressure to be applied by the rim of the wheels to the driving pulley Ic on the shaft of the brush K to drive the latter.

What I claim as my invention and desire to protect by Letters Patent is:

In a carpet sweeper of the type referred to, a wheel comprising a disc, inwardly extending flanges on the periphery of the disc, a stub axle member. a bearing member journalled thereon, one of said members being attached to the centre of the wheel, a spring by which the free end of the other of said members is supported, the other end of the spring being anchored to the casing of the sweeper to allow the wheel being resiliently mounted in relation thereto, the said flanges forming a casing which encloses the said members and the supporting spring.

JAMES M. KENYON.

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