US906035A

US906035A - Floor-dressing machine.

Info

Publication number: US906035A
Application number: US39177407A
Authority: US
Inventors: August Kraemer
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-09-07
Filing date: 1907-09-07
Publication date: 1908-12-08
Anticipated expiration: 1925-12-08

Description

A. KRAEMBB. & A. CHILD.

FLOOR DRESSING MACHINE.

APPLICATION FILED SEPT. '1, 1907.

Patented Dec. 8, 1908. 4 SHEETS-SHEET 1` wi bnc osea ww A. KRAEMER & A. CHILD. FLOOR DRESSING MACHINE.

APPLICATION FILED SEPT. 7, 1907.

906,035. Patented Dec. s', 1908.

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FLOOR DRESSING MACHINE.

APPLICATION FILED SEPT. '7, 1907.

Patented Dec. 8,1908.

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jkmm 34- A. KRABMER & A. CHILD.

FLOOR DRESSING MACHINE.

APPLICATION FILED SEPT. 7, 1907.

Patented Dec. 8, 1908.

4 SHEETS-SHEET 4.

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AUGUST KRAEMER AND ARTHUR CHILD, F DENVER, COLORADO; SAID KRAEMER ASSIGNOR TO SAID CHILD.

FLOOR-DRESSING MACHINE.

Specification of Letters Patent.

Patented Dec. 8, 1908.

Application filed September 7, 1.907. Serial No. 391,774.

z. such as will enable others skilled in the art to which it appertains to make and use the saine, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.l

Our invention relates to improvements in floor dressing machines of the class in which an operating motor preferably electric is mounted upon a movable platform and with which the abrading, surfacing or floor dressing device is connected in such a manner that it is allowed to swing freely from an axis coinciding with the axis of the armature shaft of the motor. In our improved construction this motor serves to impart a rotary movement to the abrading device upon its own axis and also an orbital travel to the frame in which the abrading device is rotatably mounted. The axis of the orbital travel of the roller-carrying frame is at right angles to the axis of the abrading roller. Provision is also made yfor automatically removing the l.ibrading dust or par ticlcs taken from the floor by the abrading device, by suitable suction mechanism. In our improved construction the frame carrying the abrading roller is permitted a limited degree of oscillating movement, whereby the abrading roller is adapted to accommodate itself to floors that are not exactly level or which do not liein a horizontal plane. This is considered a very important feature of the device. The oscillation is in a direction lengthwise of the roller, whereby either of its extremities may occupy a position above or below the other as may be required by the condition of the Hoor in any particular case.

Having briefly outlined our improved construction, we will proceed to describe the same in detail reference being made to the accompanying drawing in which is illustrated an embodiment thereof.

In this drawing, Figure 1 is a side elevation of our improved machine partly in sect-ion. Fig. 2 is a. top plan view of the same.

Fig. 3 is an elevation of the abrading device shown in detail and on a larger scale. Fig. Il is a sectional view of the same. Fi 5 is a. cross section taken through the abra ing roller. Fig. 6 is a section of thc abrading roller taken on the line 66 Fig. 4. Fig. 7 is a fragmentary view of the abrading roller illustrating means for fastening one extremity of the abrading material thereto. Fig. 8 is a similar View of the opposite eX- tremity of the roller showing a device for fastenmgthe other extremity of the abrading strip of material. Fig. 9 is a fragmentary top plan view of the frame in which the abrading roller is mounted. Fig. 10 is a section taken on the line 10-10 Fig. 9.

The same reference characters indicate the same parts in all the views. V

Let the numeral 5 designate a platform mounted on rollers 6. Connected with the rear extremity of the platform as shown in the drawing are the lower extremities of two brace bars 7 whose upper extremities are connected with a transverse frame bar 8 by means of suitable fastening devices 9. The top frame -bar 8 is provided at its opposite extremities with depending members 10 which are also secured to the platform by bolts l2 passed through flanges 13 which engage the platform.

Connected with the frame bars 7 are angle-shaped brackets 14E having vertical members 15 to which the body 17 of the'motor is securedas shown at 16. The armature shaft 11 of the motor is ournaled at its upper extremity in the transverse top bar 8.

Pivotally connected with the upper eX- tremity of the shaft 11, is a forwardly extending short bar 18 which is rigidly secured by bolts 20 to a top frame barl 19 which is connected with a bottom frame bar 21 by means of an upright 22. The bottom frame bar 21 is connected with a short bar or plate 23 by means of bolts 24. T he plate 23 .is pivotally connected with a short upwardly-projecting journal 25 mounted on the platform. By virtue of this construction the

elements

18,19, 21, 22 and 23, constitute a frame mounted to swing from a center coinciding with the axis of the motor shaft. The bottom frame bar 21 is angleshaped and to its forward extremity is attached a short bar 26 by means of a bolt 27. In this short bar is journaled the lower eX- tremity of a sleeve or hollow shaft 28. The

top bar 19 extends forwardly and is provided at its forward extremity with a short plate or bar 28 having a bearing 28^ in which is journaled a vertically dis osed shaft 29 u on which is mounted a pul ey 30 connected y means of a belt 31 with a ulley 32 fast on thearmature shaft. The s aft 29 passes through the sleeve 28, and its lower extremit 1s secured to a horizontally disposed dish-s aped pulley 33 which is connected by means of an endless belt 34, with a vertically disposed pulley 35 fast 0n the abrading roller 36. Between the

pulleys

33 and 35 are located guide pulleys 37 which are mounted on a bracket 38 and occupy an inclined position. By virtue of this construction the abradin roller 36 is rotated upon its axis at a spee slightly greater than the speed of the armature shaft since the pulley 30 as shown in the drawing is slightly smaller than the pulley 32. It is evident, however, that the invention is not limited to any particular size of pulleys.

Below the pulley 30, a small sprocket 39 is fast on the shaft 29. This sprocket is connected by means of a chain 40 with a lar er sprocket 41 fast on a shaft 42 provided with a small sprocket 43 which is connected by a chain 44 with a larger sprocket 45 fast on a hollow shaft or sleeve 28. This construction just described forms a speed-reducing connection between the shaft 29 and the sleeve or hollow shaft 28, whereby the latter is made to rotate much more slowly than the former. The sleeve 28 is journaled at the top in a bearing 46 connected with the outer extremity of a forwardly-extending bar 47 fast on the swinging framebar 22.

Into the lower extremity of the sleeve 28 is fitted a block 48 through which the shaft 29 passes. This block 48 is fast in the sleeve and is angular in cross section preferably square and its between two depending members 49 fast on the top member 50 of the frame 51 having depending members 52 provided with bearlngs 53 in which rotates the shaft 54 on which the bearing roller is mounted. The block 48 is provided on opposite sides with projections 55 which are adapted to engage set bolts 56 which may be adjusted to control the rocking or oscillating movement of the frame 51. If these set bolts are raised, a greater degree of oscillating movement may be permitted, while if they be screwed farther inwardly whereby they are caused to approach the projections 55, the degreeof oscillation will be more limited. To'the top of the frame 51 is secured a casing 57A whose upper extremity protrudes into a lar er casing member 57,

' the latter being ma e fast to the bearing 26A of the plate 26.

A dust collecting hood 58, is located adj acent the abrading roller (see Fig. 6) the said hood being open on the side next the roller to permit the entrance of the wood dust removed from the floor b the abrading roller. From this hoodacon uit 59 leads to the casmg 57^. From the casing 57 leads a condu1t60 to a suction device 61 havin an outlet 62. When this suction device 1s in operation, the dust produced b the abrad ing lroller was drawn into t e hood 58, passes thence to the conduit 59, thence to the casing 56, the casing 57 and through the conduit 60 to the suction device 61, the said dust being discharged therefrom throu h the outlet 62. The conduit 60 is connecte with the Swingin frame bar 21 by bands 63 or other suitab e fastening devices. The suction blower 61 is operated by a belt 64 whlch connects a pulley 65 fast on the armature shaft with a pulley 66 fast on the blower shaft. The ulleysI 65 and 66 occupy planes at right ang es to each other. Two guide pulleys 67 are interposed between the pulleys 65 and 66 in order that the belt may be held in proper relation with the last' named pulleys.

A vertically disposed operating rod 68 is slidably mounted 1n the top bar 19 of the swinging frame and also passes through registering o enings formed in the' bearing plate 26 an the overlapping art of the frame bar.21. Between the p ate 26 and a lifting arm 69 made fast to the rod 68, 1s a coil sprin 70 which surrounds the rod and is normal y under suilicient tension to lift the said rod sufficiently to raise the sleeve 28 together with the frame 51 carrying the abrading roller. The outer extremity of the arm 69 is bifurcated as shown at 71 and passes between two separated collars 72 fast on the sleeve 28. This lifting arm acting on the upper collar 72, raises the sleeve and the hub of the sprockety wheel 45 acts on the hub of the smaller sprocket 39 which is fast on the shaft 29, to raise the said shaft, sufliciently to lift the abrading mechanism from the surface upon which it is acting. In order to hold the abrading roller down in operative relation with the surface to be acted upon, a lever arm 73 is employed. This arm is fulcrumed vat one extremity upon a support 74 as shown at 75, while intermediate its extremities itis ivotally connected with the operating rod) 60 as shown at 76. By pressing down u on the handle 77 of this lever arm, the abradjng roller may be forced against the surface of the floor to be dressed or smoothed.

Fast on the rod 68 is a bearing arm 78 the same being secured by a cap screw 7 9. The free extremity of this arm forms a bearing` which is enga ed by the lower extremity of the vertically isposed shaft 1,2,whose upper extremity is journaled in the top fra-me bar 19.

The abrading roller 36. is hollow as shown in the drawing and upon its exterior surface sw'ond'a strip' sa offabming substance as sand paper. As shown in the drawing this abradmg substance consists of a comparatively long narrow strip of flexible material having one extremity suitably fastened at one end of the roller while its other ex-A tremity is fastened at its opposite end of the roller, the intermediate space bein covered by the said strip which is spiral y wound thereon. While any suitable means may be employed for fastening. the extremities of the abrading strip, I have shown in the drawing specific means therefor, special attention belng called to Figs. 4 to 8 inclusive of the drawing.

Pivotally mounted on the hub 81 of a disk 82 of the abradin roller, is an'arm 83 one extremity of whic is provided with a 'aw 84. Upon this arm is .pivotally mounte at 85 a lever 86 having a jaw 87. Connected with an arm 88 of the lever is one extremity of a coil spring 89 whose opposite extremity is connected with the shell of the roller as shown at 90. Normally the spring 89 acts to hold the two

jaws

81 and 84 in gripping contact. When it is desired to fasten one j extremity of the abrading strip, this extremity is passed through an opening 91 in the shell of the abrading roller and placed in position to be grasped by the

jaws

84 and 87. Preparatory to this operation, the arm 83 is moved in a direction indicated by the arrow in Fig. 8, until an arm 92 of the lever strikes a pin 93. As soon as this occurs the jaw 87 is separatedfrom the jaw 84 sufficiently to allow the extremity of the abrading strip 80 to enter (see Fig. 6). Then by moving the aim 83 in the opposite direction until the\ lever is disengaged from the pin 98, the spring 89 will act on the lever to cause the jaw 87 to close upon the abrading strip which is then tightly held between the two jaws. At the opposite extremity of the abrading roller the opposite end 94 of the abrading strip is passed through an opening 95 in the shell of the roller. vRigidly attached to the shell of the roller on the inside is an arm 96 upon which is fulcrumed a lever 97 as shown at 98. The short arm of this lever is connected at 99 to one extremity of a link 100 whose opposite extremity is pivoted as shown at A upon an arm B pivotally connected with the arm 96 as shown at C. The pivoted arm B is provided with a jaw D cooperating withy a stationary jaw E. The extremity of the abrading strip 94 is passed between these two jaws when the mechanism just described is in the position shown in Fig. 5. Then in order to lock the abrading strip in place, the lever 97 is, thrust inwardly to the position shown in 7.

From the foregoing description the use and operation of our improved machine will be readily understood. `Assuming that the motor is in' o ation, movemelltis imparted to t e shaft 29mg thence to the abradin roller 36 by virtue of the construction an arran ement of parts heretofore explained. At t e same time a less rapid motion is communicated tothe frame 51 carrying the roller, the said frame rotati on a vertical axis or at ri ht angles to the axis of the roller 36. The rame 51 is rotated by virtue of the sprocket wheel and chain connections between the shaft 29 and the sleeve 28, 'the latter being directly connected with the frame in such a manner that the rotation of the sleeve imparts a corresponding rotary movement to the frame. Two motions are thus simultaneously imparted to the abrading roller, one being a rotary travel u on its axis and the other an orbital travel with the frame in which it is journaled, the Jsaid frame rotating on a vertical axis as heretofore explained. When 'the machine is in use,

the abrading roller mechanism, may be swung freely by virtue of the pivotal connection of its frame with lthe p atform and the armature shaft .as heretofore explained.

The dish-shaped pulley. 30 at the lower extremity of the operating shaft 29 forms a receptacle for any superfluous lubricating material which may run down from the bearings above. This is an important feature, since it is not desirable that the lubricating material shall come in contact with the abrading roller.

The fact that the frame 51 in which the abrading roller is journaled, is mounted to oscillate, has been heretofore referred to. As shown in the drawing (see Figs. 9 and 10) the depending plates 49 of the frame are' provided with pins F which are made fast therein and protrude into openings Gr formed in the block 48. The said pins fit loosely in the openings G, whereby a limited degree of oscillation for the frame 51 is permitted. As shown in the drawing this oscillation of the frame 51 is inthe plane of the axis of the abrading roller.

Having thus described our invention, what we claim is:

1. A iioor dressing machine provided with a frame mounted to permit a limited degree of oscillation, means for imparting rotary movement to the frame, and means for imparting rotation to the said roller independentlyof the frames rotation.

2. A floor dressing machine provided with a frame mounted to oscillate to conform to surface changes, an abrading roller journaled in the frame, means for imparting a rotary movement to the frame, and means for imparting independent rotary movement to the roller, the axes of the frame and roller occupying positions perpendicular to each other.

3. A floor dressing machine provided with 4d: m l

an ,apen/deg shaft, an abxodi 191km a um .an :wie tetheaxis-qf frame in which the abrading ;ro er Is )ourtheroller.

naled, a dish-shaped pulley at the lovver In testimony whereof we ax om` extremity of the said shaft, said pulley being tures 1n presence of two witnesses.

5 located within the frame, an o eratlve connection between the said pu ey und the roller for imparting movement to the latter upon its uxi s, and an operative connection XVitnesses: between the said shaft and the roller frame A. J.0BR1EN,

10 for imparting rotary movement to the latter l DENA NELSON.