US862695A - Pneumatic carpet-cleaning device. - Google Patents

Description

No. 862,695. PATENTED AUG. 6, 1907. c. s. BALDWIN.

PNEUMATIC CARPET CLEANING DEVICE. APPLIOIATION FILED sn1= -r.2o.1904.

I UNITED STATES I PATENT f OFFICE.

CHARLES S. BALDWI'N, OF SAN FRANCISCO, CALIFORNIA.

PNEUMATIC CARPET-CLEANING DEVICE.

Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed September 20, 1904. Serial No. 225,168.

To all whom it may concern:

Be it known that I, CHARLES S. BALDWIN, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Pneumatic Carpet-Cleaning Devices, of which the following is a specification. i

This invention relates to improvements-made indevices that operate to remove dust from a carpet by the V application of jets of air to the surface while the carpet is in place on the floor; and the improvements comprise a novel construction of easing inclosing one or more nozzles through which jets of air are applied at an angle to the surface of the carpet, and the dust 'is disl5 charged from the casing by the joint action of suction and jets of air applied to the dustchamber or receiver all as hereinafter more fully described andpointed out in the claims at the end of this specification.

The following description explains at length the nature of my improvements, and the manner in which the same are applied and carried out; the accompanying drawings forming a part hereof being referred to therein.

Figure 1' is a sectional-view of a carpet-'cleaning device embodying my invention, the section being taken in a vertical plane transversely through 'the casing,-and

. showing the tubes or hose that connect the casing with the pneumatic and the suction appliances of the apparatus. Fig. 2 is'a perspective-view of the device showing one end of the casing broken away to disclose the internal construction. Fig. 3 is alongitudinal section ona reduced scale taken through the center of the easin g and havin'gportions of the pneumatic nozzles broken y- V K The casing a is a rectangular box closed on the top,

ends and sides, but openon the bottom. From the in? closed space b, which forms a receptacle or chamber toconfine the dust as it is dislodged from the carpet, an

opening it communicates with a hood e on the top of the easing over the opening. LA-11086 or flexible tube y se- 40 cured to a coupling f on the hood connects that part with the suction-apparatus with which carpet-cleaning devices that operate to carry off the dust by suction are usually connected. Within the inclosed space b are closed compartments h separated from the space by the partitions h ,h i and extending longitudinally from one end-wall a to the other of the casing.

The inner partition '11 is inclined to the outer partition k atan acute angle downward tow'ardthe lower edge; and at the angle formed by the two sides of the compartment an elongated or narrow aperture is opens from the inclosed space h to theoutside, The mouth of this elongated nozzle 70 is flush with the bottom edge of the casing a, and the two compartments h are so arranged within the casing that their apertures k are inelined at opposing angles from the center towards the sides of the casing. Openings y in the ends of each compartment connect the interior space with a tube or passage in on the outside of the casing, and to the tube w an air-supply tube or hose s is connected by a coupling p.

The hose s for makingconnection between the casing and the source of airunder pressure, in the' usual manner of operating devices of this character, is of sufficient length to reach from the place where the air-eompressing and exhausting engine is situated, to the place where the cleaning device is being operated; and also to allow of the casing being moved about over the car pet. The engine and other parts constituting the complete apparatus that furnishes the air and produces the suction in the casing are not shown in the drawing and do not require to be described, for the reason that the same are well known parts of similar apparatus already in use and their construction forms no part of my present lower part of this passage b at the moment of its being dislodged from the carpet and when it is at its greatest density" is accelerated and its' discharge is rendered more rapid by applying a jet or stream of air in an upward direction from an elongated slit or narrow aperture n along theinner side of the casing. This slit It opens into the passage b from a channel in extending along the lower edgeof the casing from end to end, and .t is parallel to and conterminous with the impinging aperture 70. The slit n has an upward inclination for r the purpose of directing the stream of air in the most favorable direction for accelerating the upward movement of the dust from the surface or. locality where it is dislodged by theimpinging jet from the aperture k.

A. conducting passage'3 extending transversely over or through the top of the casing from the coupling p where the passages to are connected to the opposite sides of the casing, connects the channels m with the source .of pneumatic pressure through the perpendicular passages 2 on the inside of the casing. -Through these j passages to the air is supplied to the channels 'm and the nozzles h at the same time. A single valve t in the coupling 1) will ordinarily be sufficient for regulating both sets of jets'that is the impinging jets delivered against the carpet through the apertures k, and the upwardly-inclined accelerating jets from the slits n;

Itwill be noticed inthis construction that the parts it inclose'd' by the casing have the function of air-nozzles,

operating to deliver jets of air against the surface upon which the casing is placed and moved along, and-that I I the jets are directed at an angle to such surface by vira space within which the cleaning operations take place,-

therebypreventing the escape of the dust that is raised by the OPGIatlOII S Of the apparatus into the apartment where the apparatus is being used. It will also be observed that the nozzle through which the impinging jet of air is discharged is arranged along one side of the air-and-dust-conducting passage and that the slitted air channel at through which the accelerating jet is discharged arranged along the opposite side of said passage; and that the; nozzle is so constructed and arranged that the air is directed'toward the carpet at an angle thereto and very close to its surface, while the 1 slit in the air channel m is arrangedto deliver the air in an upward-direction. I prefer to arrange two sets of air cleaning nozzles and of accelerating air discharge slits in asingle apparatus, as shown, and to arrangethe nozzles near-the center of the apparatus, while the slits are arranged near the outside walls of the casing, though this arrangement is not essential to the principle of my invention.

' Having thus described my invention, what I claim and desire to secure by Letters Patent is :1

L In a pneumatic apparatus adapted for the cleaning n carpets, the combination of a casing arranged to rest directly upon the surface to be cleaned and to 'inclose an air space, an elongated nozzle within the casing arranged to discharge a jet of air downward against the surface to be cleaned, an elongated slitted air channel conterminous with the said elongated nozzle arranged to discharge a jet of air upward and away from the surface to be cleaned, and means for connecting the said nozzle and air channel with a source of air under pressure,substantially as set forth. 4

2. In a pneumatic apparatus for cleaning carpets, the combination of a casing arranged to rest directly upon the surface to be cleaned and to inclose a space within which the cleaning operations are carried on, an elongated nozzle within the casing arranged relatively near its transverse central plane and arranged to deliver a jet of air downward directly against the carpet, an elongated. slitterl air channel conterminous with the said elongated nozzle arranged near the side of the casing and opposite the said nozzle arranged todischarg e a jet ofair upward and in a direction away from the surface to be cleaned, and means i for connecting the said nozzle and air channel with a source of air under pressure, substantially as set forth.

3: In a pneumatic apparatus for cleaning carpets, the combination of a casing arranged to rest directly upon the surface to be cleaned and to inclose within itself an air space, a pair of nozzles arranged relatively near the transverse central plane of the casing arranged to deliver jets of air downward against the surface to be cleaned and in directions inclined toward the opposite sides of the casing, a pair of slitted air channels m arranged along the sides of the casing opposite the said nozzles to'deliver jets of air toward the nozzles and' in an. upward direction, and means for connecting the said nozzles and air channels with a source of air under pressure, substantially-as set' forth. In testimony whereof I have hereunto set my name to this specification in the presence of two subscribing witnessesl f CHARLES 's. BALDWIN.

Witnesses EDWARD E. OSBORN,

ALFRED SAVAGE.

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