US 2045980 A
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June 3%, 1936. 5 DE NAGY 2,945,986
POLISHING MACHINE 2 Sheets-Sheet 1 Filed May 12, 1933 INVENTOR- P June 30, 1936. B. DE NAGY POLISHING MACHINE Filed May 12, 1933 2 Sheets-Sheet 2 INVENTOR, 3e] 6W3? BY v 70/ ATTORNEY Patented June 30, 1936 UNITED STATES PATENT OFFICE POLISHING. MACHINE toria, N. Y.
Application May 12, 1933, Serial No. 870173,. 2 Claims. (01. 15-49) This invention relates to devices for brushing, polishing, scrubbing and the like, and has for its main object to provide a device of this character which will be directly operated by an air-motor or turbine.
The object of the invention is the production of a polishing device which can be operated with air having a pressure slightly above the atmosphere, as that derived from the outlet of a vacuum cleaner, and may constitute an accessory to the latter.
A further object of this invention is to provide a device of the type mentioned herein, the operating elements proper of which will describe a rotary motion, and which will be eflicient in operation, inexpensive to manufacture, simple in construction, and which will be adapted to be attached to the usual vacuum cleaner, or other devices generating air pressures.
Still a further object of this invention is to provide a directly driven rotating device for the purposes mentioned which will, be adaptable to many such operations of various character, having easily exchangeable parts. With this object in view, and in which the operating part may be easily adjusted to counteract the effects of the usual wear and to make the device best fitted for the service desired at any time;
Other objects of this invention will be apparent as the specification thereof proceeds, and among others, I may mention, to provide a device as characterized hereinbefore which will be safe in operation, easy to handle and manipulate, constructed to operate with slight pressure above the atmosphere and at the same time have no harmful back effects on the source providing the air pressure when the device is slowed down, or even stopped by outside resistance; which will be double acting, that is, in which the same 40 stream of air will act twice on the operating part of its motor; which will be easy and quick in starting, and which will embody means whereby to prevent an undue resistance to act on the operating parts proper in view of the lower pres- 45 sure of the air driving the air motor of the device.
With the above and other objects in view, our device mainly consists of a horizontally placed rotor or turbine for air or other gas operation 50 wherein the compressed gas is led into said rotor at a certain point of its periphery passing through the same and acting on its vanes at that point, then passing through another part of said rotor and again acting on its vanes at that second point 55 and thereafter escaping into the atmosphere, the
brushing, polishing or scrubbing device being directly secured on the shaft of said turbine, means being provided in a housing of said turbine to change the relative distance of the operating element proper from said rotor, and to secure the 5 same in said relation, and means being also provided in connection with the housing of said rotor and said brushing device whereby the pressure and resistance acting on said operating element proper will have an upper limit, after which 10 the excess thereof will be taken up by said means in the housing of the device in a yielding, resilient manner.
In the drawings forming a part of this specification and accompanying the same: a 15 Fig. 1 is a semi-diagrammatical plan view of my assembled device, the cover of the rotor bein removed;
Fig. 2 is a sectional elevation thereof, the section being taken on the line 2-2 of Fig. 1;
Fig. 3 is a bottom view of my assembled device, and
Figs. 4 and 5 indicate an elevation and a plan view respectively of an element used with the adjusting means for the shaft of my device, while 25 Figs. 6 and '1 are fragmentary details of a modification of the pressure limiting means for the operating element proper of my invention.
Referring now to the drawings more closely, by characters of reference, my invention is provided with a housing l0 substantially cylindrical in form having an upper compartment II and a lower compartment l2 open at its lower end and a partition wall l3 between said two compartments, said housing being generally of a cylindrical shape and placed in a vertical position when used in my invention. In the upper compartment ll of the housing, a rotor or turbine l4, having a plurality of vanes I5 is arranged on a rotating disc Ma and is terminated by outer" and inner imaginary cylinder surfaces l6 and I1, respectively, as is well known in the art. The contour of the vanes l5 may be designed according to the principles of engineering science to be most eflicient for the conditions present in the particular case, but for the sake of simplicity and saving, I prefer to make them circular segments. A hub I8 is also provided for the rotor I4 by which the same is secured on a vertical shaft I 9 which for this purpose may have a square portion 20 engaging said hub l8. A removable cover 2| may be provided for the housing i0 and in the center thereof may be arranged a ballbearing, generally indicated by the numeral 22 for the upper end of the shaft H), the specific preferred construction of said ball-bearing to be described hereinafter.
A second ball-bearing 23 may be provided in .the partition l3, shaft l9 projecting through said Second ball-bearing l3 and the lower end 24 of said shaft may carry in a removable and exchangeable manner the operating device proper 26 secured thereon. Said operating device proper is shown herein in the form of a circular brush 26, of any suitable construction which will constantly be pressed in a downward direction against a surface 21 to be operated on, like the floor of a room, by the helical spring 26. I again prefer to make the shaft is square in cross-section adjacent to its lower end and to form the hub 36 of the brush device 26 accordnsly. said brush being secured in its place by a nut 3|, as will be understood.
The upper compartment ll of the housing I0 is continued in an air conduit 32 through which compressed air or other gas may be introduced, as indicated by the arrow 33 from any suitable source, with a pressure and velocity as desired. For a convenient and easy use of my invention said conduit 32 may be provided with means whereby it may be attached to an outlet opening on the usual vacuum cleaner and my device operated therethrough.
Then air will follow the internal contour of the air conduit 32 (Fig. 1) and will strike the vanes l5, as at 34, will then pass through1them in a certain case, that is, at a certain speed, pressure and other factors of operation, following the direction generally indicated by the dot and dash line 36 and leaving the inner openings of the vanes at 35A will pass through the space in the rotor following the line 36 and will exit following the center line 31 striking the vanes once more as at 38 so that the same air current will act on the vanes a second time. For the exit of the air openings the conduit 32 and being spread at that portion of said wall to a certain distance. (Figs. '1 and 2.) It will be noted that the intersection of the inlet conduit 32, with the wall of the upper compartment is substantially on the same level with the outlet openings 39. In the case indicated in Fig. l the air current substantially will have the limits indicated by the lines 40 and 4| and the outer limits of its exit are indicated by the lines 42 and 43. Under other circumstances the direction, width, and spread of exit of said air current might be different but it will generally follow the conditions shown in Fig. 1.
The wall of the lower compartment l2 of the housing I6 is extending outwardly as at 44, and is continued-in an outer second downwardly projecting wall 45, the lower portion 46 of the wall of the compartment i2, the outwardly projecting extension 44 thereof, and the outer wall 45 forming a circular downwardly open channel 41. In said channel are arranged sectional brushes 46, preferably of the type shown and secured, in a removable and exchangeable manner, to a plate 49 in said channel, by any suitable means. It will be noted that the lower end of the wall of the compartment l2 and the lower end of the wall 45 are normally spaced from the surface 21.
The brushes 48 are of harder construction and material than the main operating brush 26 and it will be obvious that in case an unusually heavy pressure is put on the housing of the machine, or the brushes 26 receive a pressure inclined outer surface 53 and it 39 are provided in the wall of the compartment ll substantially opposite to rial and construction so that in case of excessive pressure the device will rest on said stationary brushes 43 and will still permit the brush 26 to operate.
Brush 26 may be removed, as will be obvious to all those versed in the art and also from inspecting Fig. 2 and another similar circular rotating operating device secured in its place so that my machine may easily do brushing, polishing, scrubbing or any other similar operations.
In order to adjust my device to the various elements so exchanged and also to take up the wear of the brush 26 the upper bearing 22 will have the adjustable specific construction shown in Fig. 2. According to this construction the upper end 56 of the shaft l9 will be journaled in a ball-bearing proper 5| of any suitable construction, said ball-bearing being again loosely housed in a resilient split sleeve 52 (Figs. 4 and 5). Said sleeve has a downwardly projecting is slotted or split at a desired number of places edgethereof downwardly to a certain distance, as at 54. A second sleeve 55 is arranged around that said split sleeve 52 engaging the cover 2i of my device by the screw threads 56 and having at its upper end a knurled flange 51 for an easier rotation thereof. The inner surface 58 of said sleeve 55 is reversely'inclined to the inclination of the outer surface of the split inner sleeve 52,
from the upper so that said inner surface 58 may co-operate with the outer surface 53 of said split sleeve 52.
In assembling or on starting a new rotary tool in my device, the screw threaded outer sleeve 55 is partly unscrewed, which will permit the split sleeve 52 to open up, and the shaft l9 and the tool at the end thereof, as for instance, the rotary brush 26, will drop downwardly until the brush is in close contact with the door 21 whereupon the screw threaded sleeve 55 is screwed down, which will cause the split sleeve 52 to close upon the ball bearing 5| and so secure the upper end of the shaft'l9. In a similar manner any wear on the brush 26 may be taken up, the lower ball-bearing 23 being of such a construction that it will permit the sliding of shaft l6 in its inner bore while the fit of said shaft I! in said bore will be such that normally the inner race of the ball bearing 23 will rotate with the shaft IS.
A rubber ring 60 may be secured projecting from the outer surface of the outer wall 46, said rubber ring to act as a bumper for the device.
I prefer to make the rotary brush 26 oval in shape instead of making it fully circular (Fig. 3), the advantages of this construction being that the frictional resistance against the same will be reduced, while it will perform the same amount of useful work, and its operation will also be greatly improved by this oval shape of the same since the starting outside bristles in this brush will always attack new surfaces and will operate as if the brush would be continuously starting afresh which is a more eflicient and easier way of brushing than if a fully circular brush would, so to say, be continuously rubbing over the same surface. The stationary brushes 48 are preferably made in three sectional parts, as indicated in Fig. 3,and
will have the additional purpose, aside from the one mentioned hereinbefore, that they sweep,
brush and clean the floor before the operation of the rotary brush 26, and their segments are arranged in such a manner that they will sweep the whole floor in any direction the device may be moved. They also may be exchanged and replaced by brushes of similar or other constructions and sizes by any suitable method.
In a modification of my device said brushes 48 are replaced by the caster-like construction of brushes indicated in Figs. 6 and '7. In this modification rotatable shafts iii are arranged in the extension wall 44 of the lower part of my device. said shafts 6| being continued in forks 62 in which are iournaled shafts 63 of rotating brushes 64.
The brushes 64 are constructed of such materials that they can replace the stationary brushes 48 in the relieving of the rotary brush 26 from excessive pressure, they also will clean and sweep the floor in front of said brush, while the device may be more easily moved about on such rotary brushes.
The air will have the shortest exit and most eflicient route through my device. It will act twice on the vanes, as has been explained herelnbefore, and the air will freely pass through my device even if the rotor I4 is forced to remain idle which is a great improvement over other air turbines or motors now used. In a similar device as the one here described, with air motors of present design if the brush 26 receives an excessive pressure or the rotor It would be stopped from rotation by any other cause, the current would not find any way to pass through the device and would cause undue stresses and great rise in temperature in the compressor or other source of the air, which cannot happen with my device since the air will always escape from the same.
Changes'and variations may be made in the construction of the parts within the limits of the claims without departing from the spirit and scope of the invention.
What I claim as new, is:
1. A floor polisher comprising a housing, upper and lower compartments in the housing. said compartments being separated by a substantiall fluid tight partition, said upper compartment beingprovided on its periphery with openings for the admission and the unrestricted exhaust of a current of fluid, a rotatable shaft mounted in said partition and extending into each of said compartments, turbine blades fixedly mounted on said shaft in the upper compartment and arranged to be driven by fluid passing into said compartment through saidinlet opening, said fluid discharging through said discharge opening, a polishing brush mounted on said shaft in the lower compartment and extending below the same, resilient supporting means for said polisher arranged to relieve the brush of excessive pressure against the floor, whereby the rotation of the brush on the floor is permitted without sufficient frictional drag between the brush and the floor to prevent rapid rotation thereof by said turbine, yet permitting suflicient friction between the brush and floor to effect the polishing thereof.
2. A floor polisher comprising a housing, upper and lower compartments in the housing, said compartments being separated'by a substantially fluid tight partition, said upper compartment being provided on its'periphery with openings for the admission and the unrestricted exhaust of a current of fluid, a rotatable shaft mounted in said partition and extending into each of said compartments, turbine blades fixedly mounted on said frictional drag between the brush and'the floor.
to prevent rapid rotation thereof by said turbine, yet permitting suiflcient friction between the brush and floor to effect the polishing thereof.
BELA DE NAGY.