US1822522A - Vacuum cleaner - Google Patents

Description

B. D. GOLDBERG VACUUM CLEANER Sept. 8, 1931.

Filed Oct. 19, 1927 2 Sheets-Sheet 1 INVENTOR B. D. Goldb BY Wm w 27 TTORNEYgQ p 1931- B. D. GOLDBERG v 1,822,522

VACUUM CLEANER Filed 001:. 19, 1927 2 Sheets-Sheet 2 INVENTOR B. D. fioldbecg Patented Sept. 8, 1931 BENJAMIN n. GOLDBERG, or BROOKLYN, NEW YORK VACUUM CLEANER- Application filed. October 19, 1927. Serial No. 227,120.

My invention relates to that class of vacuum cleaners in which suction or pressure is applied to the surface to be cleaned while at the same time a brush properly L6 mounted and rotatingin the apparatus is passed over said surface with the object of loosening any dust or dirt which is thereupon removed by the .suction or pressure blast.

In this class of apparatus the brush is usually mounted within a mouth through which the brush slightly projects to engage the surface, said brush being preferably and usually driven by a belt connection with a pulley motor-driven'in the usual constructions by the same motor which works the Suction or fan blast. Inasmuch as the brushes in use may wear out or the belt may require renewal, provision must be made for the replacement of the brush. Various means have been provided for this purpose. The object of the present invention is to improve upon the previous constructions and to facilitate the work of renewal.

The invention'is especially designed as an improvement upon those constructions wherein the brush shaft is mounted in bearings held by friction in slotted ears projecting from a bar or frame that, in some 0 constructions, is a part of the slotted cover plate for the suction chamber or nozzle.

"According to my present invention I provide for the rotary brush shaft a telesco ic frame the parts of which are telescopica ly 5 adjustable in the direction of or parallel to the axis of the rotary brush whereby, through simply extending the telescopic frame, the brush shaft and its connections are readily removed.

My invention relates further to details of construction comprising suitable means for automatically ejecting the'teles'copic frame with the brush.

The invention further consists in special details of' construction as hereinafter more particularly described and claimed.

In the accompanying drawings:

1 is a front elevation of an apparatus embodying my invention, the lower part or brush-carrying portion being shown in vertical section.

Fig. 2 is a view of the apparatus looking from the bottom into the slot back of which the brush is mounted.

Fig. 3 is a side elevation with the socket portion shown in section looking in the direction of the arrows 3, Fig. 1.

Fig. 4 is a perspective View of the brushcarrying frame detached from the device.

tion.

Fig. 6 is a vertical section through the socket portion of the device with the inverted telescopic frame in position; and

Fig. 7 is a cross-section on Fig. 6 looking in the direction of the arrows 77.

1 indicates the usual nozzle or suction chamber having a suitable opening opposite which the brush of the device is mounted and through which the bristles of the brush slightly project for engagement with the surface to be cleaned. Said socket or nozzle 1 may form an integral part of an aluminum or other casting 2 having a chamber or attached casing 2" in which the electric motor driving the vacuum or pressure pump is mounted. 3 is the usual drive wheel connected to the motor shaft and driving a belt 4 which passes over the pulley or wheel 5 on the brush-carrying shaft 6. Said belt extends through a passageway between the body of the device and the vacuum chamber or nozzle portion lin the manner preferably employed in the art. According to my present invention the shaft 6 is mounted in journal bearings 7 carried respectively by sections of a telescoping frame adapted to contract or expand in the direction parallel to the axis of the brush shaft. Said sections,

Fig. 5 is a perspective View of a modificawhen the frame is a two-part frame, are inthe part 8, may have a socket into which the for the bearings 7. Said bearings receive the ends of the shaft 6 which slips into the bearings endwise from the inside of the ears 9 9 preferably. This construction gives simplicity, cheapness and durability. Said bearings 7 may have any desirable anti-friction bushings indicated at 10, said bushings being secured friction-tight in position or held securely b other means as will be presently described:

Since the sections 8 8 may be moved telescopically with respect'to one another in the direction of or parallel to the brush shaft it is obvious that when the frame is removed from the socket or nozzle 1 the bearings may be spread apart to permit removal of the brush and replacement thereof by an unworn or new brush. To hold the brushcarrying frame in position within the socket 1 the usual sliding cover 12 may be employed, said cover having slot 12' opposite the brush as is the usual practice. The cover itself is firmly secured by means of the lips 13 thereon which engage with the flanges on the edge of the socket as clearly shown in the drawings. In the preferred construction of the frame the ears or projections 9 9 are integral and bent up from the sheet metal forming the sections of the frame and the bearings 7 are also struck up from the metal of the ear to form suitable supports for the shaft 6 which rotates therein andin the anti-friction bushings inserted in place. Said shaft may be held during normal operation of the device by the exterior fastening plates 14 which are in position to prevent endwise movement of the shaft. Said plates 14 are formed preferably as ears or extensions bent up from the material of the ears or brackets 9 9.

At 15 is indicated a plate spring or other form of spring interposed between the brushcarrying frame and the bottom of the socket or nozzle and acting normally in a direction to tend to eject the frame from the socket. Said spring may be attached to the frame or may be applied in any other desired manner to act on the frame to tend to eject it.

To remove the brush and replace the same by a new brush it is simply necessary to detach the cover plate 12 w ereupon the spring will serve to raise the frame above the edge of the socket. The belt may now be unshipped from pulley 3 by means of a hook V or tool inserted through a suitable opening as usual in the art and the frame then completely removed. By the telescoping action parts 8 8 may now be caused to slide apart whereupon the shaft 6 may be slipped out of the bearings in obvious fashion and a new brush inserted in its place. Then the telescoping sections are restored to the normal position shown in Fig. 1. In doing this it is obviously not necessary to remove the bearings or the journal bushings or any of their associated parts. The sections having been contracted and the frame restored to the position shown in Fig. 1, the belt is reshipped and the usual plate 12 slid into place. Said retaining plates or ears 14 prevent excessive end play of the shaft 6.

In the modification shown in Fig. 4 the brush-carrying frame is made in three telescoping sections the center one of which receives the end sections and carries the spring 15. The use of this modification is practically the same as that of the two-section frame as is obvious. At 17 is indicated a detachable plug located over the pulley 3 and permitting access to the belt 4 for un-' shipping the same.

Fig. 5 illustrates a modification of my invention wherein the part 8 forming a part of the telescoping frame isprovided with one inwardly-bent ear or bracket 9-integral with the plate 8 and furnished with one of the bearings already referred to. The opening thus made by bending down the part 9 provides an opening or slot for the a plication of the suction or blast furnished t rough the socket or nozzle 1. Another slot of opening at the other end of the plate 8 is provided with the projecting ears 18 bent downward from its edge and around to form guides or receptacles for the arms 8' of the other end portion of the telescoping frame carrying the-bent down bracket ,9 and a bearing 7. Theopening of the frame next ears '18 forms one portion of the blast or suction passage for the nozzle 1. The frame 8 8 is held down in position over the edges of the socket 1 by means of the clips 21 as shown which secure it tightly in place and locate and support the brush-carrying shaft in proper position as will be readily understood. The use of the device forming this modification will be obvious from the foregoing description of the form described in connection with the Figs. 1, 2, 3 and 4.

To renew the brush the frame is removed after unshipping the inner end of the belt. from the pulley 3 and the telescoping sections carrying the bearings for the shaft are then slid apart thus permitting the brush to be removed and a new brush to be inserted.

What I claim as my invention is 2-- 1. In a vacuum cleaner including a nozzle,

a rotary brush comprising a shaft and.

mounted in said nozzle, of a shaft supported in said frame, brush elements on said shaft, said frame being made ,in sections telescoping longitudinally of said frame and in the direction parallel to the rotary brush shaft, the ends of said frame being provided with ears extending at right angles to the longitudinal axis of the frame and bearings for the rotary shaft struck up from the metal of said ears and adapted to receive the ends of the rotary brush shaft.

3. In cleaner including a nozzle, the conhination of a rotary brush shaft having bristles thereon mounted in said nozzle a longitudinally extensible and contractible frame provided with lateral ears having bearings for said shaft and holders applied over the outside of the said bearings to hold the shaft against longitudinal displacement in its bearings.

4. In a cleaner having an air nozzle, a rotary brush comprising a shaft and bristles thereon, a holder frame for said shaft mounted in said nozzle and having ears provided with bearings for the brush shaft and shaft holding extensions from said ears located over the end of the bearing to hold the shaft in place, said ears, bearings and extensions being integral with one another and with the frame.

5. In a vacuum cleaner including a nozzle, a rotary brush adapted to rotate in the nozzle and comprising a shaftand bristles thereon, a sheet metal brush-holding frame madein parts one of which telescopically engages another longitudinally of said shaft and having lateral ears provided with struck-up bearings struck up from the metal of the ears and overlapping metal shaft re tainers formed integral with said ears.

8, In a vacuum cleaner, the combination of a suction chamber having a. nozzle or mouth, a brush comprising a rotary shaft provided with bristles thereon positioned in saidchamber with said bristles in proximity to the mouth, a shaft supporting frame mounted in said chamber and made in sections one of which telescopically engages another longitudinally of said shaft, means on said frame for retaining said brush thereon, a spring attached to said frame and con structed to react against a stationary portion of said chamber, saidspring being normally under tension tending to eject said frame from the mouth of said chamber and means for normally retaining the supporting frame in place in said chamber.

7, In a vacuum cleaner having an air 322218, the combination of a supporting frame seated in the nozzle, a brush comprising a shaft with bristles thereon mounted in the frame and adapted to project through the mouth of the nozzle, a spring on the frame positioned to contact the wall of the nozzle to urge the frame and brush outwardly and a slotted cover plate attached to the nozzle and extending partially over its mouth to hold the frame in place with the spring under tension.

8. In a vacuum cleaner, the combination of a brush comprising a shaft and bristles thereon and a brush-supporting frame made in sections one of which telescopically engages another in a direction parallel to the axis of the brush shaft and having air openings through which the brush may project.

Signed at New York, in the county of New York and State of New York this 17th day of Gctober, A. 1927.

BENJAMIN D. GQLDBERG.

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