US1753376A - Floor-surfacing machine - Google Patents

Description

April', 1930. G. T. HILLS v1,753,376

I FLOOR SURFACING MACHIE Filed Nov. 7, 1927 2 Sheets-Shea?l l 5 avez-2751":

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April 8, 1930. G. T. HaLLs 1,753,376

FLOOR SURFAC ING MACHINE Filed Nov. '7, 1927 2 sheets-sheet 2 Patented Apr. 8, 1930 tiene?.l ra

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GEORGE T. HILLS, or CHICAGQJLLINCIS, AssIGNoR, BY DIRECTAND MEsNEAssIGN- IvIEnTs, To MUSKEGON' MANUFACTURING COMPANY, ,oF MUSKEGCN; ivIICHIGrAlIy A CORPORATION OF I MICHIGAN rLCoasuRrACING MACHINE Applicatoniled November This invention relates to' a iioorY surfacing machine and more particularly to one adapted for use in nishingjthe exposed surfaces of wood or composition floors, said surfacing machine further adapted to be controlled by an individual and is electrically operated,v causing a rotatable abrasively covered finishing drum to travel over a surfacewhich is to be finished or polished.

It is an obj ect of this invention to provide a floor surfacing machine wherein the finishing roller or drum is adapted to be slightly tilted or vertically adjusted to permit polishing of portions of the floorfwhich are uneven at the margins' or at other points.

It is also an object 0f 'this invention to provide'a floor surfacing machine with an adjustable spring-controlled dust collector,

adjustable with the downward adjustment of'r the finishing drum and adapted to be automatically elevated with the upward movement of said drum.

It is a further object ofthis invention to provide an improved Hoor surfacing machine provided with an improved inverted U- shaped dustbag, the upper end of which isv directed downwardly and is provided witha clamping mechanism which may be voperated to open the discharge end of the fbag for emptying the contents thereofwith'out necessitating the removal of the dustbag from the y machine. l y

lt isk furthermore an objectiof this invention to construct a' floor surfacing machine of an improved simplified. type having a pivoted handlebar mountedon a steering post and connected by means of toggle mechanisms with the finishing drum supporting spider, whereby the drum during'the operation of the machine be moved toward or away from the floor to vary the pressurewofthe i finishing drum on the surfacewhich is being finished. n

It is an important object of 'this invention to provide an improved simplified formy of floor surfacing machine wherein the finishing drum and the dust collecting fan are; electrically driven,' and' having the finishing drum and the dust collecting hood adjustableV by means of a handle mechanism for 7,Y 1927. serial No. 231,412.

varying the pressureof the drum upon the I Figure l is a top plan view of a floor surj facing machine embodying the principles of this invention and havingparts kbroken away.

yFigure 2 is a side elevation of the machine with parts broken away. 1

Figure 3 is a front elevational view of the machine with parts broken away, and' with the finishing roller removed.

`Figure 4Vis an enlarged plan'view of the bag-gripping mechanism .or Clamp mounted on the steering postof the machine whichis shown in section, and illustrating theoperation'of the clamping aws in dotted lines.

j Figure 5' is a fragmentary detail vksection taken on line V-V of Figure 1. v As shown on'the drawings: Y The reference numeral l indicates ka truck frame or carriage having a pivoted castor bracket '2 mounted underneath therear'end thereof with said castor bracket carrying a rotatable castor Wheel 3. A stub shaft 6 is supported by a journal bearing 4 in one sideV of thetruck frame 1 and a collar 7. The shaft 6 supports a front wheel 5 outwardly of the journal 4. The bearing collar 7 is integrally formed on one side of a dust intake pipe or extension 8 which is rigidly secured or formed on one side of a fan casing`9, the other side of which casing-is provided with a'bearingcollar 10 which is rotatably supportedon a bearing sleeve 11 on which a second front wheel 12 is rotatably supported. The bearing sleeves/1 and 11 are integrally formed on the truck frame 1; Rotatably journalled in the front wheel supporting sleeve V1l, is. a fan shaft 13 'which projects into the fan'casing 9 and has mounted on the inner end thereof a fan. wheel 14; Secured on the outer projecting end of the fan shaft 13 is a fan pulley 15 j di) in which a V-crosssectioned fan driving belt 16 is engaged. The fan belt 16 is also trained around a V-grooved fan driving pulley 17 secured on the projecting end of a motor shaft 18 forming a part of an electric driving motor 19. The motor 19 is removably secured upon the top of the truck frame 1 by means of retaining bolts 20. Connected to the terminal posts 21 of the motor are a pair of conductors 22, to the ends of which a socket 23 is connected.

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Secured to the rear of the fan casing9 is an extension 24 in which a dust outlet pipe'v 25 is secured. Attached to the projecting outer end of the dust outlet pipe 25 is the lower end of aUshaped dustbag 26, the curved or bight portion of which is provided with suitable means to permit the bag to be hung from a hook carried on a pipe handle or steering post 27` the lower end of which post is removably 'secured by means of bolts 28 in a clamp 29 mounted on the rear extension of the truck framel.

The discharge end of the dustbag 26 is directed downwardly and is adapted to be closed by pinching the open end thereof between a pair of rubber clamping pads 30 secured on the inner faces of a pair of clamping arms 31 which are pivotally mounted at 32 on a bracket 33 rigidly secured on the steering post 27. Each of the clamping arms 31 is provided with a curved or bowed extension or handle 34. The ends of the bag clamping handles 34 are connected by means of a pair of toggles orlinks 35. The toggles 35 are pivotally connected one to the other and to one end of a connecting link 36, the other en d of which is pivotally connected to a lever or handle 37 which is pivoted at one end on the pivot 32 as clearly illustrated in Figure 4. When the lever 37 is moved from the dotted line position of Figure 4 into the full line position the clamping arms or jaws 31 are closed against opposite sides of the outlet end of the dustbag 26, thereby clamping saidl bag between the clamping pads 30. With this novel arrangement of a dust collecting bag it is not 'necessary to remove the bag from the machine in order to empty the same. When a sufiicient amount of dust has been accumulated in the discharge end of the bag a dust receiving receptacle may be placed beneath the outlet end of the bag, after which the lever 37 may be moved into the dotted line position of Fig- 3 ure 4 causing the connecting link 36 to actuate the toggles 35, thereby swinging the clamping Larms 31 into open position to permit opening of the discharge end of the dustbag so that the contents thereof maybe discharged into the receiving receptacle.

The dust resulting from the polishing or finishing of a floor is adapted to be drawn into 4a dust collector or hood 38 which is secured to the intake end of the fan extension orreceiving pipe 8. 'The fan' casing 9, together with the extension 8 and the dust receiving hood 38, are pivot-ally mounted on the truck frame as hereinbefore described, allowing the outer tracking end of the dust collecting hood 38 to be raised out of engagement with theioor by means of a heavy coiled spring 39 or the like, one end of which is attached to the fan extension or intake pipe 8 while the upper end is secured to the floor of the truck frame 1. Mounted on the floor of the truck frame 1 and projecting downwardly there through is a stop screw bolt 40 adapted to be engaged by the fan casing 9 for the purpose of limiting the upward swing of the dust collecting hood 38 when pulled upwardly by the control spring 39. f

Removably clamped by means of retaining nuts 41 in bearingextensions 42 of the truck frame is a shaft 43 having rigidly secured on each end thereof a bell crank arm 44, hav- .o

abrasive material 48 is applied. The drum 46 is provided with a groove or slot for receiving the ends of the pad 47 and the sheet ofabrasive material 48, to hold said abrasive material secured in position on the drum by means of retaining screws or other suitable E means. The drum 46 is mounted on a drum shaft 49 which is jcurnalled in the bell crank arms 44 and has rigidly `secured on one projecting end thereof a pulley wheel 50. The `pulley wheel 50 is provided with a il-shaped grooveV for receiving an endless V-cross-sectioned driving belt 51. The driving belt 51 is trained around a small pulley 52 engaged on the outer end of the motor shaft 18 outside of the-pulley'17. It will be noted that the finishing drum is rotatably supported in a pivoted bracket supported on the truck frame so that the finishing drum may be raised or lowered to vary the pressure of abrasive covering of said drum on the surface to be finished.

Rigidly secured on the shaft 43 at substantially the middle portion thereof is a block 53 provided with a handle 54 to facilitate the removal of the finishing drum unit "s lshaft 59 ysupported in the rear extension of the new abrasive.

the truck frame 1. Secured on one end of the bell crank shaft 59 is a second bell crank armv 60, to the endof which the lower end of a connecting rod 6l is pivotally engaged. lThe upper end of theconnecting rod 61 is pivotally connected to the right-hand handle 62 of a crossarm 63 which is pivotally .supported on the upper end of thesteering post 27. The cross arm 63 is also provided with a left-hand handle 64. 1 Y

rlhe operation of the pivote-d cross arm handle mechanism controls the pressureof the vdrum upon the floor. The downward movement of the handle 62 decreases the pressure of the drum upon the floor while the Vdownward movement of the left-.hand handle 64 causes increased pressure of the drum upon the licor. For vthe purposeof regulating they maximum pressure of the drum upon the '1 floor a control device is mounted on the steer- 46 the set screw 65 is adjusted and the lever 67 is raised by means of the handle 68 to rercive the end of the set screw 65 seated thereagainst to limit the downward swing'of the left-hand handle 64, thereby limiting the pressure of the drum on theiioor in order to obtain the maximum cutting eiliciency of This arrangement of the set screw 65 and the lever 67 affords a means whereby the minimum pressure of the drum uponthe floor is adapted to be obtained when v the abrasive paper is new. After the abrasive paper hasbeen worn down with the use of the limited pressure the lever 67 is swung downwardly bypulling upwardlyon the handle 68, thus removing the stop from in front of the set screw 65 allowing Athe handle to moved downwardly a greater distance to produce a maximum pressure of the drum upon thefioor. This control of the pressure of the abrasive material on thefloor affords an arrangement that enables the operator lto do considerably more work with a minimum amount of abrasive material. K

As illustrated in Figures 1, 2 and 3, an

additional metal weight 69 is provided with said weight having a longitudinal slot or groove in the bottom thereof to permit the weight 69 to be seated upon the handle 54 of kthe block 53 forming a part of the framework in which the finishing drum is supported. The eXtra weight 69 is provided with a handle 70 for the convenience' of handling the same.v The eXtra weight 69 may be used as desired when it becomes necessary to increase the pressure or weight ofthe finishing drum on the surface which is being finished.

An arrangement is provided whereby the either'end of the drum may be used for linishing a floor or surface when the floor is uneven at its edges or vat other points. The adjusting or tilting of the drum is accomplished by means of a pair of adjustable screws 71 which are threaded througha portion of the block53 and contactthe upper edge ofthe middle portion 72 ofva spring'bar having the ends thereof twisted to form a pair of integral spring arms 73, the ends of which are bolted to extension lugs 74 integrally formed on the bell crank arms 44 which carry the finishing drum 46. vThe spring'bar 72 73 is pivotally mounted at itsymiddle portion and has the adjusting screws 71 contacting the Lipper edge thereof on opposite sides of the pivotv pin ofsaid springbar.

This arrangement permits the drum mechanism to be slightly sprung ortilted whereby uneven portions of the floor maybe finished by the finishing drum. Mounted on the steering post 27 is an electric controlswitch 7 4EL having two conductors 75v leadingtherefrom and connected to a plug 76 which is adapted to be coupled up with the socket 23 connected with the terminals of the driving motor 19.

Also connected with the switch 74a is v,an extension cord (not shown) of kany desired length adapted to be connected with abase plug or power .socket tov'permit a source of electrical energy to vbev conducted tothe driving motor. `The operation is as follows:

With the parts assembled as illustrated in Figures 1 and 2 and with the finishing drum 46 having a new covering of abrasive material 48 engaged over the pad 47,'.the machine is adapted to be set in operation .by an operator by turning on the electrical 'switch 7 4a to cause operation of the motor19, which in turn is adaptedto impart a drive to the floor by the weight ofthe drum carryingframe and the drum since the arms 45of the bell crank arms 44 are positioned to seat on the side flanges of the dust collecting hood,

as clearly illustrated in Figure 2. When the abrasive covering 48 of the drum is new the pressure controlling setscrew 65 is adjusted for controlling the maximum pressure of the abrasive material on the floor by swinging the control lever 67 upwardly into alignment with the set Vscrew 65 as illustrated in Figure 3.

The machine is pushed over the floor by an o perator and the pressure of thedrum upon the iioor is governed by the pivoted crossbar 63. By pushing downwardly on the right- 64 is pushed downwardly. The pressure of the drum is governed by the operation of the connecting rod 6l, the bell crank arms 60 and 58 and the connecting rod 57, which is adapted to actuate the hooked rocker arm 56 which is connected to the pivoted drum supporting Vframe so that the drum may be either raised or lowered, depending upon the direction in which the handles 62 and 611 are moved by the operator. In case additional pressure is required for the drum an eXtra weight 69 may be placed upon the drum supporting frame handle 54. The dust collecting hood 38 is controlled` by the spring 39 which acts to hold the same in contact with the extensions of the drum supporting frame. The upward swing of the dust collecting hood 38 is adapted to be limited by means of the stop screw 40.

As the machine is advanced over the floor the abrasive drum is adapted to finish and polish the surface while the fan wheel lll is adapted to create a suction in the hood 38 causing the dust on the floor to be pneumatically drawn into the hood to be discharged through the fan outlet pipe 25 to be deposited in the outlet throat of the dust collecting bag 26, the end of which is closed by means of y the clamping arms 31.

, the finishing drum.

The finishing drum may be tilted with respect to thev floor by adjusting the control bolts 7l which act on the pivoted spring bar 72-73 to spring the same a slight amount sufficient to tilt the finishing drum so that uneven edges or portions of the floor may be properly finished.

After a sufficient quantity of dust has been collected in the throat of the dust collecting bag 26 the clamping control lever 37 is adapted to be moved by the operator from the full line position shown in Figure i to the dotted line position, thereby causing the connecting link 36 to break the alignment of the toggle bars 35, thereby causing the clamping jaws or arms 31 to be separated to release the mouth of the dust collecting bag 29. A receiving receptacle may be placed under the dis-charge mouth Vof the dust collecting bag to receive the contents of said bag. With this Varrangement it will be noted that the ,dust collecting bag need not be removed from the machine in order to empty the same.

l am aware that many changes may be made, and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art.

l claim as my invention:

l. A floor surfacing device comprising a framework, rollers Vsupporting the same, a driving motor on said framework, a dust collecting fan pivotally supported on said framework, a dust collecting hood connected with said fan, a surfacing drum unit removably engaged on said framework and co-acting with said dust collecting hood, a steering post mounted on said framework, a control switch on said steering post, means for connecting the same with said motor, a control mechanism connected with said finishing drum unit, a control handle pivotally mounted on said steering post and connected with said control mechanism to cause the pressure of the drum unit on the floor to be varied depending upon the operation of said pivoted handle, and means mounted on said steering post and on said pivoted handle for regulating the maximum pressure of said finishing drum unit.

2. A floor surfacing machine comprising a roller carriage, a fan unit pivotally mounted thereon, a finishing drum unit pivotally supported on said carriage and co-acting with said fan unit, driving means on said carriage connected to operate the fan unit and said finishing drum unit, a steering post for said carriage, a. dustbag connected to said fan unit with the discharge end of said bag directed downwardly, clamping means on said steering post adapted to engage the mouth of said discharge bag to close the same and adapted to be released for emptying the bag without removal from the machine, a control handle pivoted on said steering post, link mechanisms connected to said handle and with said finishing drum unit to permit the pressure of said finishing drum unit to be varied when the handle is operated, and pressure control means mounted on the steering post adapted to be set to limit the maximum pressure of the finishing drum unit on the floor.

3. A floor surfacing machine comprising a roller carriage, a drum finishing unit adjustably supported thereon, a steering post on said carriage, a handle pivoted on said steering post, a pressure control mechanism mounted on said carriage and steering post connected with said pivoted handle and with said finishing drum unit to vary the pressure of said finishing drum unit on the floor, an adjustable set screw device carried by said pivoted handle adapted to be set for limiting the maximum pressure of said drum finishing unit on the floor, and a member pivotally supported on said steering po-st positioned to be contacted by said set screw to limit the movement of saidV pivoted handle in one direction for limiting the maximum pressure of the drum finishing unit on the floor, and permitting said maximum pressure to beincreased by swinging said member out of contact with said set screw. Y

4. In a fiocr surfacing machine, the combination with a roller carriage, of a steering post for pushing-the same, a finishing drum unit adjustably mounted on said carriage, means for driving the same, a lcontrol handle pivotally mounted on said steering post,

mechanisms operated by the pivotal movement of said handle to vary the pressure of the finishing drum unit on the floor, andl coacting means mounted on said steering post and on said pivoted handle for limiting the maximum pressure of said finishing drum unit on the floor. i

5. In a floor surfacing machine, the combination with a roller carriage, a dust collecting unit pivotally mounted thereon, a spring connecting said roller carriage with said dust collecting unit to normally hold the receiving end of said dust collecting unit ofi1 ofthe i'ioor, a finishing drum unit removably and adjustably engaged on said carriage positioned to contact the receiving` end of said dust collecting unit to depress the same against the action of said spring, a pressure controlled mechanism on said carriage adapted to be operated to adjust the drum finishing unit with respect to the floor to vary the pressure of said drum finishing unit, and

means carried on said drum finishing unit for tilting the same with respect to the floor.

G. A floor surfacing machine comprising a wheel supported frame, a Avfinishing drum unit supported on said frame, said unit comprising a drum and a carrier, said' carrierarranged to move said drum bodilyandk also f tilt the same, means operable at will for bodily moving said drum, a dust collector unit comprising a rigid duct pivotally supported intermediate its ends by said frame and havsaid stub shaft, a fan shaft journalled in said first mentioned sleeve, a duct pivotally supported on said first mentioned sleeve and on the inner'end of said stub shaft, said duct being provided with a fan chamber, a fan in said chamber on said fan shaft, ka surfacing drum, a carrier for said drum removably attached to said frame arranged to move said drum vertically, means for actuating said carrier to movesaid drum, a hood adjacent said `drum and communicating with said duct, a dust bag on the other end of said duct,

means for normally urging vsaid hood upwardly, cooperating means on said hood and said carrier-opposing said first-mentioned means, and means on said frame for actuatingv a fan within said chamber-on said fan shaft, a surfacing drum, a carrier for said drum` arranged to move said drum vertically, means 'I for actuating said carrier to move said drum vertically, a hood communicating with said duct behind said drum, a dust bag on the vother end of said duct, spring means for normally urging said hood upwardly, cooperating means on said carrier and said hood for opposing said spring, and means on said frame Vfor actuating said drum and said fan.V

In testimony whereof I have hereunto subscribed my iiame.

ing a hood at one end and a dust bagat the Y other end, a spring tending normally to raise said hood, there beingcooperating members e on said carrier and said hood for opposing said spring, a fan within said duct supported by a fan shaft which is coincident with the pivoted supports of said duct, a motor on said frame for actuating said drum and said fan, and a handle for guiding said machine having means thereon for'controlling said motor.

7 A floor surfacing machinecomprising a frame, bearing sleeves formed thereon, a wheel rotatably mounted on one of said sleeves, a stub shaft journalledin the other of said sleeves, a second wheel carried by GEORGE T. iiiLLs.

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