Патент USA US2119386код для вставки
May 31, 1938. “ >c). HoLM-HANSEN ET AL A 2,119,386 FLOOR POLISHING MACHINE ’ Filed Aug. 28, 1954 Inventor-'s : I Oâmund Holm-Hansen; Noble HWGT’ES , Patented May 3l, 1938 2,119,386 UNITED- STATES.A PATENT OFFICE FLOOR `POLISHING MACHINE Osmund Holm-Hansen, Stratford, and Noble ' Watts, Bridgeport, Conn., assignors to General . Electric Company, a corporation of New York` Application August 28, 1934,> Serial No. 741,840 9 Claims.v Our invention relates to polishing machines for polishing floors and the like. An object of ` ourinvention is to provide a com pact polishing machine which may be used under l furniture and in otherplaces having small clear ance.' _ Another ‘object of our invention is to provide an improved arrangement for detachably fasten ing thepolishing elements to the driving spindles. .l0 Further objects 4and advantages of our inven tion will become apparent as Vthe following‘de scription proceeds. V « i. ' In the drawing Fig. 1 is a perspective .view of a (Cl. 15-49) is journaled in a bearing 21 whichis carried in a bearing support 28 formed integrally with the shell Ia. A worm 25 is attached to the end of the shaft 26. 'I'he plate 8_ is provided with four integral tubular bearing supports I8, II, I2 and 5 I3 which extend vertically above and below the plate. A bearing I4 is arranged in each o! the bearing supports. Each bearing extends slightly above the upper end of. the bearing support and is ' provided at its lower end with a shoulder I5 which l0 engages the lower end of the bearing support. Four‘vertical spindles I6, I1, I8 and'I9 are jour naled in the bearings I4. Each of the inner spin-v dles I1 and I8 has attached to its upper end a cone-shaped member 2l having a worm wheel 22 on its- outer‘ periphery which meshes with the worm 25 secured to the. motor shaft 26. As the motor shaft turns, the spindles I1 and I8 are for thelpolishing elements; Fig.-4 is a side eleva tion, partly in section, of the polishing' machine; ’ rotated in opposite directions. A conical shaped 20 Fig.'5 is a fragmentary plan view of the polishing cup 23 attached to the inner surface of each of ’ machine; and Fig. 6 is a fragmentary sectional »the worm wheels- 2_2 carries oil from depressions 34 in the plate 8 to the inner surface of the worm view of the polishing machine with polishing ele wheel from which the oil is thrown by centrifugal mentsfor 'final polishing; Referring _to the drawing'. the polishing ma# force through holes 24 to lubricate the worm gear polishing machine embodying our invention; Fig. ll 2 is an enlarged perspective view ofthe handle and the latch for latching the handle in position; Fig. v3 is a sectionalvicw of the driving mechanism 25 chine comprises polishing elements or brushes 2 , which are driven through reduction gearing con-À l25. Oil slingers 20 are attached to upper ends 25 of spindles 'I6 and I9 and prevent leakage of oil , tained in an enclosed `casing .I by a horizontal around these spindles. shaftmotor 3 attached to the rear of the casing ' , Clutch members or holders 35, 36, 31, and 38 I and extending'rearwardly vfrom the casing in for‘receiving the' polishing elements are respec fsu _substantially the same plane as the` casing. A tively connected to the lower end of each of the 30 handle '4 is pivotally attached at 5 to the motor 3 ` spindles I6, I1, I8, and I9. Each oi these holders comprises ametal cup 39 which is threaded'on ` for guiding the machine over a floor or other surface to be polished. -Since there are no rolls . lthe end of the spindle and has an annulus 40 of to support the machine,` the entire weight of the resilient material such as rubber molded around a5 polishing machine is supported on the brushes 2 the depending rim. The inner surface oí> the which increases the effectiveness of the polishing annulus of rubber is tapered vto provide a conicalv ' and no marks are made on theA iloor. As the 'clutch surface for frictionally _engaging the con ' motor 3 extends horizontally from the casing I, ' the polishing machine can be used under furni . '40' ture or in other places where the vertical clear ance is small. _ _ lT'he casing I', In which the driving mechanism , for the brushes is located, comprises a concave shell _la having ridges 6 at“ the front and de 45 pending sides 41 to which a -plate 8 is secured ' by sc?ewsñtting into lugsj 8. The lugs 8 are -' disposed at ‘intervals about the‘inner surface of Vthe depending sides 1. A gasket '33 arranged about the edges of the plate'A -8 is compressed ical'surface 42 ofthe polishing elements. The outer surface Áof the rubber is cylindrical and the outer surface of the 4rubber on holders 36 and 31 '40 frictionally engages the outer surface of the rubber on holders 35 land 38 and forms a fricï tion drive between the spindles .I6 and I1 and the spindles i8 and I9 respectively. The inner con» ical surface of the rubber Ívpr'ovides a convenient 45 clutch for holding the brushes or polishing ele ments 2~from which the 4brushes may lbe readily removed. . l _ _ - The spindles I1 and I8 are rotated in opposite . 'directions by the motor shaft 28 and the outer 150spindles I8 and I9 `are rotated in opposite direc l - _ ‘ tothe rear side of the shell Ia by studs` 2_8 and tionsby the clutches“ and 31. Adjacent polish ¿mœgsmst 9. shoulder A9a oil the'shell . Ia and Dro » vides Van oil-ti‘ghtjoint. The niotor 3 is attached -extends longitudinally in substantially the same ing elemeutsare therefore driven in ‘opposite di planeas 'the shell. 'Thef motor has a horizontal rections. Thethreads on the spindles I6, I1, I8, - Imi _shan :tamén extends withiatnéeasing l and and I3 are arranged'îsqghat the holders 35.38,v 55' 2,119,386 31, and 33 tend to tighten on the spindles as they are rotated. As the machine is supported by the polishing elements, this manner of rotating these elements tends to prevent the machine from turning on the ñoor or other surface to be pol the disk portion 61 of the holder which is of friction material such as rubber and molded in tegrally with the lower end of the neck 65. The disk portion of the holder is reinforced and main ing la over spindles form stops which prevent tained in a fiat condition by a metal disk 68 which is embedded therein. The inner edge 69 of the disk 68 is bent upwardly and extends into the spindles from dropping into the inner com the neck 65 to reinforce the connection between partment of the casing when the casing is turned upside down, and the clutches are unthreaded the neck and disk portions of the holder. The outer edge 10 of the disk 68 is turned up to pro vide a reinforced edge. From the upper edge of ished. Lugs 4| which are positioned on the cas from the spindles. 'I'he handle 4 has at its lower end arms 45 which are pivotally attached at 5 to the motor 3. Instead of'being freely pivotable, however, the 15 handle is arranged to be latched in a number of ñxed angular positions. This arrangement Iof the handle allows the machine to be supported on ~the brushes and makes additional support for the machine unnecessary. The relatively ysmall brushes provide a narrow line of contact and per mit wide variation in the angle of the polisher to the floor without interfering with the operation of the machine. `In the surface of the motor frame, there are provided slots 43 in which a spring-pressed- latch 44 disposed Within the handle is adapted to> be positioned to hold the handle in one of a number of fixed angular posi tions. The upper ends of the arms 45 are threaded to receive a union coupling 46 which the neck 65 of the holder, integral rubber walls 1| ilare outwardly and upwardly to a hollow hub 12. A metal ring 13, having a serrated inner surface 14 molded to the outside of the hub 12, 15 has a tapered outer surface which is adapted to engage the tapered inner surface of holders 35 or 38 to complete the driving connection to the polishing element in the same manner as the tapered surface 42 of brushes'2. 'I'he walls 1| 20 of the holder provide a flexible universal joint connection which allows the felt disks to be main tained in contact with the floor through a wide variation in the angle of the polisher to the floor. The polishing element shown in Fig. 6 can be 25 used for sanding by substituting a sand paper disk for the felt disk illustrated. Although we have shown a particular embodi ment of our invention, we do not desire to belimited to the construction described, and intend 30 in the appended claims to cover all modifications which do not depart from the spirit and scope of joins the arms to the handle 4. Disposed within .the passageway formed when the arms 45 are thus joined to the arm 4 is a split latch casing 41. This latch casing is provided with shoulders 48 our invention. What We claim as new and desire to secure by which engage the arms 45 and prevent the latch 35 casing being moved. The latch 44 is disposed Letters Patent of the United States, is: within the latch casing and a compression spring l. In a polishing machine, a vertical spindle, 49 normally presses the latch downwardly into means for driving said spindle, a holder secured engagement with one of the slots 43. A lever 50, ' to the lower end of'said spindle, said holder hav pivoted at 5| and extending through an opening ing an annulus of resilient material with a tapered in the latch casing 41 is provided for moving the surface, and a polishing element secured to said 40 latch out of the slots 43 against the action of . holder by frictional engagement with said tapered vthe spring 49. _ A conductor 52 adapted to he- connected to a source of electrical supply and containing the 45 conductors 53 and 53' is introduced into the hol low handle 4 through an opening adjacent the switch 54. The conductors 53 and 53' are led through the handle 4 and connected to binding screws 55 on opposite sides of the latch casing 41. 50 As the latch casing fits snugly within the arms 45, the casing is cut away to provide clearance for the conductors 53 and 53’. These conductors are connected to the motor. The end of the handle 4 is provided with a hand grip 58 for the conven 55 ience of the operator'. In Fig. 6, the polishing machine is shown equipped with two polishing elements each hav ing a felt polishing disk 6| of larger diameter than the brushes 2 which is suitable for final polishing. The felt disk is loosely attached to the lower side of a rubber holder 62 by a pin 63 having a split shank which extends through the surface. _ 2. In a polishing machine, a vertical spindle, means for driving said spindle, a holder secured to the lower end of said spindle, said holder hav ing an annulus of resilient material, and a polish ing element secured to said holder by frictional engagement with the inner surface of said an nulus. 3. In a polishing machine, a vertical spindle, means for driving said spindle, a holder secured to the lower end of said spindle, said holder hav ing an annulus of resilient material with a tapered inner surface, and a polishing element having a complementary tapered surface secured to said holder by frictional engagement with said inner surface. 4. In a polishing machine, a vertical spindle, means for driving said spindle, a holder secured to the lower end'of said spindle, and a polishing 45 50. 55 60 element, said holder and said polishing element having complementary tapered surfaces at least center of th'e felt disk 6| and through a hole 64 l one of which is formed of'resilient material for in the center of the‘neck portion 65 of the holder. 65 The head of the pin and the portion of the felt disk around the head are drawn within a recess 66 in the lower side of the holder, and the upper ends of the split shank which project above the upper surface of the neck 65 are bent outwardly 70 to hold the pin in place. The pin 63 loosely fastens the felt disk to the holder 62 so that the , holding said polishing element in said holder. 5. A polishing machine comprising` a casing 65 having two vertical spindles rotatably carried therein, a holder secured to each of said spindles, said holders having an annulus ofA resilient mate rial with a tapered inner surface, the outer sur faces of resilient material on each holder beingv in 70 frictional engagement, said holders being adapted disk remains in position 'on the holder when the ‘ to hold a polishing element` by frictional en machine is lifted from the floor. When the ma- ‘ gagement with said tapered surface, and. means chine rests on ‘the floor, the felt disk is driven by for driving one of said spindles. < _ 75 frictional engagementl with the lower surface ofv 6. In a polishing machine, .a vertical spindle.` . 2,119,386 means for ldriving said spindle, a metal cup se cured to said spindle and having a depending rim, an annulus o’f rubber having a tapered surface secured to said rim, and a polishing element se ëured to said spindle by frictional engagement with saidtapered surface. , 7. A polishing machine comprising a casing having ltwo vertical spindles rotatably carried therein, a .metal cup having a depending rim se 10 cured to each of said spindles, an annulus of-rub ber having a tapered inner surface secured to ` i 3 having a hub secured to said clutch member by vfrictional engagement with said tapered surface and having flexible walls below said hub for per mitting alignment of said polishing element with the surface being polished. , 9. In a polishing machine, a vertical spindle, means for driving said spindle, a clutch member secured to the lower end of said spindle, said clutch memberl having an annulus of resilient 'material with a tapered surface, a vrubber holder for a polishing disk having a hub secured to said each of said rims, the outer surfaces of each an clutch member by frictional engagement with said tapered Vsurface and having a disk-shaped a polishing element securedto each of said spin- _ portion at the lower end. and a polishing disk dies by frictional engagement with the inner `sur secured to said holder at the~ center and driven face of each annulus, and means for driving one by engagement with the lower surface of the disk of said spindles. f ' shaped portion of the holder, said holder having 8. In a polishing machine, a vertical spindle, flexible walls below said hub for permitting align-> means for driving said spindle, a clutch mem ment of said polishing disk with the surface be \ ber secured tothe lower end of said spindle, said ing polished. 20, clutch member having an annulus of resilient OSMUND HOLM-HANSEN. nulus of rubber being in frictional engagement, ‘ material with a tapered surface, a polishing ele ment, a rubber holder for said polishing element NOBLE H. WATTS.