US2272476A - Carpet sweeper - Google Patents

Description

C. C. PARRISH Feb. 10, 1942.

CARPET SWEEPER Filed 001:. 2, 1940 INYENTOR. M22571 Carl GP ATTORNEYJ Patented Feb. 10, 1942 rrlcr.

CARPET SWEEPER Application October 2, 1940, Serial No. 359,309

2 Claims.

An object of my invention is to provide means, in a carpet sweeper, for preventing rotation of the floating axles and the wheel sleeves upon which the traction wheels are journalled without interfering with the freedom of floating action of the main casing relative to said axles. A further object of my invention is to provide means, associated with the above-mentioned axle holding mechanism, by which downward pressures from the casing to the floating axles will be automatically varied in accordance with the position of the operating handle relative to the casing.

The accompanying drawing illustrates my invention.

Fig. 1 is an end elevation of a sweeper embodying my improvements, one of the traction wheels being partially omitted;

Fig. 2 a vertical fragmentary axial section;

Fig. 3 a fragmentary section on a larger scale on line 33 of Fig. 2; and

Fig. 4 a plan on a smaller scale.

In the drawing I indicates the main casing of the sweeper provided at each end with a vertical end wall II, provided with perforations I2, I2 through which the floating axle I3, I3 projects.

Each axle I3, closely outside the outer face of each end wall II is transversely notched atv I4 to receive a spring finger I5 suitably anchored on the casing. For convenience, the two spring fingers I5 at each end of the casing are the free divergent arms of a spring I6 mounted on a headed pin I'I carried by a depending arm I8, one on each outer end of a rock shaft I9 journalled in the end walls of the casing and provided at its middle with a radially extending arm 20 projected through a slot 2| formed through the top In of the main casing I0 and adapted to receive a suitable operating handle.

Each spring finger I5 is conveniently formed of wire of round cross section and the notch I4 has a depth somewhat less than the diameter of the finger, conveniently approximately one-half that diameter, the notch I I having a flat bottom against which the spring I5 lies in such manner as to resist rotation of the shaft and prevent rotation of that shaft so long as the finger I5 is prevented from movement radially away from the shaft. In order to retain finger I5 in notch I4, without interfering with the lateral movement of shaft I3 slidingly relative to finger I5, I sleeve upon the outer end of shaft I3 a sleeve or hub 25 which, at its inner end, is transversely slotted at 26 crosswise of the bore 21 of the sleeve and capable of being slipped over the finger I5 in such manner as to restrain said finger I5 from being moved out of notch I4 radially of the shaft I3 and to restrain it from movement axial- 1y of the shaft to tangle with the wheel.

A traction wheel 30, if desired, may be journalled directly upon shaft I3 beyond notch I I, but in order to provide a convenient ball bearing for the traction wheel 30, sleeve 25 is provided with a ball race 3| provided with balls 32 upon which the wheel is journalled, said wheel being conveniently formed by two mating stampings 33, 33 providing the ball race 34.

Outward displacement of sleeve 25, which would result in a disruption of the interlocking relation between said sleeve and the wire I5, is prevented by nut 35 threaded on the outer end of shaft I3, accidental removal of this nut being prevented by a slight peening of the outer end of the shaft.

The perforation I2 in the end wall II is covered by a washer 36 interposed between the outer face of the end wall II and spring finger I5.

The usual brush 40 is provided at each end with a friction wheel III which is interposed between a pair of traction wheels 30 in any well known manner.

The spring fingers I5 exert downwardly and inwardly inclined forces upon the traction wheels through the axles thereof to keep the traction wheels in peripheral contact with the brush hub wheels so that pressure exerted upon the casing by the operating handle permits the operator to force the brush downwardly more or less into engagement with the floor. This downward movement results in a downward. movement of the casing and a consequent increase of the distance between the two shafts I3, I3 whichrelative movements are permitted because the shafts are free to slide lengthwise to their springs I5 but the springs are at all times held in the notches I4 by the cross notches 26 and sleeve 25 and consequently the shafts I3 cannot rotate,

such rotation being prevented by the spring fingers I5.

I claim as my invention:

1. In a carpet sweeper comprising a casing, a

sleeve against outward axial displacement on the axle.

2. In a carpet sweeper comprising a casing, a wheel axle having a transverse notch intermediate its length, a sleeve rotatable and axially slidable on the axle and having a transverse slot in one end intersecting the bore of the sleeve and registerable with the axle notch, a spring finger anchored on the casing and slidably projected through the axle notch and sleeve slot and retained by the sleeve against radial displacement from the axle notch, means retaining the sleeve against outward axial displacement on the axle, and a wheel journalled on said sleeve.

CARL C. PARRISI-I.

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