US1708242A - Suction cleaner - Google Patents

Description

PT" 1929. w. s. SIMPSON 1,708,242

SUCTION CLEANER Filed Dec. 1921 "9 9 J J a lg mil-Will! 0 l I O I l y "a, a 4 4 K a Q 4 (a IIIIIIIIIIIIIIIII W a H v H.

r lacy Z liwento y WaZZerJ'. Jilrywm a zizarlwy Patented Apr. 9, 1929.

UNITED STATES PATENT OFFICE...

WALTER S. SIMPSON, OF CANTON, OHIO, ASSIGNOR- TO THE UNITED ELECTRIC CO]!!- I PANY, OF CANTON, OHIO, A CORPORATION.

SUCTION CLEANER.

Application filed December a, 1921. Serial No. 520,897.

The invention relates to suction cleaners commonly used for cleaning carpets and floors, in which the cleaning action is performed by air currents caused by suction into the mouth of the nozzle or'tool of the machine, which may be supplemented by a rotary brush serving to pick up loose threads, lint and other flocculent material.

In machines of this character, the cleaning mouth of the nozzle or tool usually comprises an elongated slot or opening which may have a substantial width, the rim thereof being normally held in sealing contact with the carpet, compelling the air to pass through the carpet to the mouth; and when the contact between the rim and carpet is broken, a portion or all of the air may pass over the carpet and beneath the rim to v the mouth.

The objects of the present improvement is to provide means in the mouth of the nozzle or cleaning tool, spaced from and parallel with one lip of the rim of the mouth and protruding slightly from the plane of the lips, for causing the carpet to seal against the same and the other rim of the mouth, and raising the adjacent lip of the mouth free of sealing contact wit the carpet or floor for the full width of the nozzle or tool, for receiving surface dirt, such as lint, ravclings and thread which are dislodged and drawn into the mouth with the inrushing air.

The above and other objects may be at tained by shaping the mouth of the nozzle or cleaning tool in the form f an elongated opening or slot, the. front li thereof being slightly higher than the rear lip, when the mouth is in a horizontal position; a rod, preferabl in the form of a roller, being located in t e mouth, parallel with, adjacent to and slightly lower than the front lip, the carpet being sealed across the month between the roller and rear lip, compelling the air to be drawn through the carpet to the mouth, the space between the rod and the front lip being free from the carpet, causing surface litter to be dislodged and drawn into the mouth with the inrushing air.

The invention thus set forth in a general way may be embodied in the form of device illustrated in the accompanying drawing forming part hereof in which- Figure 1 is a bottom plan view of a portion of a suction cleaner showing the nozzle constructed in accordance with the invention; and Fig. 2, a section on the line 22, Fig. 1.

Similar numerals refer to similar parts throughout the drawing.

Thecasing of the machine includes the cyllndric fan chamber 1 and the forwardly extending vacuum chamber 2 below the fan chamber and communicating therewith through the orifice 3 in the intervening wall 4, for exhausting air from the vacuum chamher into the fan chamber through the action of the fan 5, which may be driven in any usual manner as by an electric motor.

The nozzle 6 communicates with the for.- ward end of the vacuum chamber, being transversely elongated upon opposite sides thereof and arranged to be supported upon or adjacent to the carpet by means of the usual wheels 7, the rotary brush 8 which extends through the nozzle being rotated as by the belt gear 9 operatively connected to one of said wheels.

The elongated mouth of the nozzle includes the rear lip 10 arranged to be engaged in sealing contact with the carpet when the same is drawn up by the reduced pressure within the nozzle, and the front lip 11, which held by the rod 12 is slightly higher than the rear li so as to be held out of sealing contact wit the carpet during the operation of the machine.

The rod 12, which is preferably in the form of a roller journaled at opposite ends in the end walls 13 and 14 of the nozzle, is preferably located parallel with the front and rear lips of the mouth and is positioned nearer to the one li than to the other and also protrudes slig tly from the plane of the lips.

It 'is preferable to place the rod or roller 12 in impingin contact with the nozzle brush 8, as best s own in Fig. 2 of the drawing in order that any ravelings or threads which tend to fasten upon the rod will be remov edby the operation of the brush, preventing the mouth of the machine from becoming clogged or choked by the ravelings or threads winding around the rod.

When the carpet is drawn up against the mouth of the nozzle by the reduced pressure within the vacuum chamber, it is held in sealing contact with the rod or roller 12 and the rear lip of the mouth, while the forward lip'of the mouth is held free from engage- .ment with the carpet, as shown in Fig. 2 of the drawing.

The strong suction of the machine will thus draw cleaning currents of air from under and through the carpet between the rod 12 and the rear lip of the mouth, while a positive air current will be drawilig under the forward lip of the mouth along the surface of the carpet, for not only drawing in particles of refuse, but sweeping over the surface of the carpet, under the front lip of the nozzle.

The centrifugal fan serves to maintain a constant suction through the cleaning mouth, and when the same is applied to a carpet or other fabric, the power is so proportioned that in addition to drawing cleaning currents of air from under and through the carpet, a locally intensified current of air is drawn under the front lip of the nozzle, over the surface of the carpet, and within the mouth of the machine, and by carrying all the dust and surface litter immediately to and through the exhaust orifice, the formation of inactive air pockets in the forward portion of the nozzle is prevented, consequently preventing settling of dust and dirt therein.

I claim I a A suction cleaner casing forming a vacuum chamber having an elongated mouth with rim lips presented to a carpet or the like, protruding means in the mouth located nearer to one lip than to the other for hearing on the carpet and holding the same from sealing contact with the one lip, and a rotatable brush in the mouth arranged to impinge upon the protruding means and to contact with the carpet between the protruding means and said other lip.

WALTER S. SIMPSON.

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