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Патент USA US2127851

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Aug. 23, 1938.
‘
2,127,851
F. E. WADHAMS
FLOOR SURFACING MACHINE
Filed Nov. 1, 1955 <
2 Sheets-Sheet 1
?edekwl; Iliad/1427725
q“ 52W 86
a9‘
Aug. 23, 1938.
‘
F. E, wADHAMg
2,127,851
1 FLOOR SURFACING MACHINE
Filed?ov. 1, 1935 ‘
2 Sheets-Sheet 2
772065771574"
?'ede?c/ai? Wadizame,
Patented Aug. 23, 1938
2,127,851
UNITED STATES PATENT‘ OFFICE
2,127,851
FLOOR SURFACING MACHINEv
Frederick E. ,Wadhams, Chicago, Ill., assignor
to Lincoln-Schlueter Floor Machinery 00.,
Inc., Chicago, 111., a. corporation of, Illinois
Application November 1, 1935, Serial No. 47,863
7 Claims.
This application relates to floor treating ma
chines such as sanding or steel wooling machines,
and in some of its aspects relates particularly to
a machine easily adaptable to perform separately
5 several different functions, such as sanding, steel
wooling, and polishing.
>
In machines of this character it is desirable
to have the parts rigidly constructed and as
sembled, and to have the bearings well housed
10 and of a good construction. Nevertheless, in
order for the machine to be adapted for the dif
ferent functions mentioned, it is necessary that
the sanding drum be easily replaced by a polish
ing brush, or that any other desired floor sur
facing element be employed in the machine as
a whole. ‘These different and, in some cases, op
posite requirements have been reconciled in the
present invention by providing a plurality of in
terchangeable assembled units, one including the
20 brush and another a sanding drum, and both in
cluding bearings assembled in bearing housings,
the housings themselves being readily attached
to and detached from the frame of the machine.
It has long been recognized as very desirable
25 in a sanding operation to provide a vacuum de
vice for cleaning up the waste developed by this
operation. In the past this has been accom
plished by the use of a ?xed intake nozzle ad
jacent the sanding drum and connected to a suc—‘
30 tion fan. If such a ?xed construction were used
for steel wool it would not be satisfactory be
cause if the nozzle were positioned to just clear
the floor when the steel wool was fresh and thick
on its mounting in the. machine, the nozzle would
very shortly bear against the floor as the steel
wool was worn down, and prevent operation of the
machine. On the other hand, if the nozzle were
positioned properly for the steel wool after it was
worn down, it'would be too high when the steel
40 wool was fresh, and fail to catch the steel wool
which would then scatter over the ?oor.
The danger of this practice, particularly in
bakeries and other food establishments, schools
and the like, where the steel wool fragments might
' get into food, or, as in schools, where the children
might scuff it up and then inhale the same, is
readily appreciated.
The present invention overcomes these dif
?culties by providinga nozzle which is adjust
able with respect to the remainder of the ma
55
chine, and which may be locked in place slightly
out of contact with the floor for sanding or polish
ing operations, or may be left free to slide along
the floor for steel wooling in a universal action.
In the type of machine illustrated, and which
(01. 51-476)
has been very satisfactory commercially, it is
necessary that in use the handle be rigidly con
nected to the machine to permit exact control of
pressure on the sanding or floor treating roll and
speed of movement of the machine. It is also de- 5
sirable that the handle be adjustable to suit the
height of the individual operator. Although
these requirements of adjustability and rigidity
have heretofore been provided, the present inven
tion contemplates an improved construction for 10
providing then, the handle being pivoted for ver
tical adjustment and being secured at any desired
elevation by a brace pivoted to another point on
the machine and clamped to the shaft of the han
dle at any point which will givethe desired ad
justment.
From the foregoing it is evident that the ob
jects of the invention include the provision of a
machine which is suitable for a variety of pur
poses and which may be readily adapted for such 20
purposes, and the provision of an improved and
more convenient form of handle attachment
which is both rigid and adjustable.
Other objects and advantages of my invention
will be apparent from the following description,
taken with the drawings, in which:
Fig. 1 is a perspective View of the form of floor
treating machine’chosen for illustration in this
application.
Fig. 2 is a perspective View of the polishing
brush assembly which may be used therein.
Fig; 3 is a perspective view of the sanding drum
assembly which may be used therein.
Fig. 4 is a side view of the machine illustrated
in Fig. 1, with certain portions broken away.
—
Fig. 5 is ,a bottom view of the machine illus-,
trated in Fig. 4.
-
Fig. 6 is a View partly in section, taken ' sub
stantially along the line 6-6 of Fig. 5.
i Fig. '7 is a fragmentary sectional view taken
substantially along the line 1--'l of Fig. 6.
Fig. 8 is a perspective View of the attachable
crank.
Although this invention may take numerous
forms; only one has been chosen for illustration.
In this form ‘the machine comprises a frame I l on
which is mounted a motor I 2 which drives a rotary
?oor treating member I3 at one end of the frame
II. The otherend of the frame II is supported
on wheels M. The position and movement of the
frame ‘H, and consequently the action of the
floor treating member I3, is controlled by the
handle, which includes the gripping bars l6 and
the handle shaft I1 secured to the frame or motor
in a manner described below. The motor I 2 also 55
2,127,851
2
drives a fan mounted inside the fan casing I9
which draws air and Waste in through the dust
pan or nozzle 2| and blows them through the
pipe 22 into the bag 23.
The floor treating device indicated generically
by the number [3 may comprise a cylindrically
shaped polishing brush 26 (Fig. 2) or a drum 21
(Fig. 3) which is preferably rubber coated and
provided with means for conveniently attaching
1O sandpaper thereto. It is preferred that the brush
26 and drum 2'! each be normally provided in the
form of a complete assembly including, besides
the brush or drum, a shaft 29 therein journalled
in bearing housings 3| and 32 on opposite sides
of the drum or brush and keyed to a driving pul
ley 33 on the outside of the bearing housing 32.
Ur
Either one of these assembled units may be se
cured to the frame by screws 36 and 31. As
shown best in Fig. rI, the bearing housing 3| is
20 secured to the frame | I by a ?ange lying on the
inside of the frame, preferably by screws extend
ing through the frame I! and screwing into the
?ange of bearing housing 3|. The bearing hous
ing 32‘ on the other hand' has flanges lying on
the outside of the frame. II, the screws passing
through the ?ange of the bearing housing 32 and
screwing into the frame II. It is preferred that
the screws 36 be flat headed and counter-sunk so
as not to scratch a vertical surface beside which
30 the machine may be run, but this is not neces
sary with respect to the screws 31. Pins 38
secured to the frame extend through holes in
each bearing housing to insure proper position
ing thereof.
35
_
The pulley 33 is driven by a belt 4| which ex
tends around the pulley 33 and around a pulley
42" on the motor shaft. The pulley 42 may be
integral with a pulley 43 which drives the belt
44, which in turn drives a‘ pulley 45 keyed to the
shaft of the fan.
‘
To substitute one treating member for another
it is merely necessary to remove the eight screws
35 and 3‘! and press the assembled treating unit
toward the side on whichithe driving pulleys are
mounted. The bearing housings then slip off of
the pins 38 (Figs. 4-and 6) , thus permitting pres
sure on the driving belt 4| to be released, and
permitting the driving belt to be removed with
50
ease. The pins 38 are provided preferably on the
sides H of the frame, extending toward the right
in viewing the structure from the position of Fig.
7, and ?t in corresponding apertures in the bear
ing housing. This permits withdrawal toward
the right as mentioned above. The treating mem
ber with its bearing housings and pulley is then
removed and the different treating element put
in place, the bearing housings being-slipped onto
the'pins 38 and the screws being inserted and
tightened. By turning the‘pulley 33, the belt 4|
60 is then easily forced onto» the pulley 33, it being
much easier to force the belt on than to force
it off.
When a sanding operation is to be performed,
the drum is applied to the machine as described
and the sandpaper is‘applied to the drum in the
usual manner, being drawn tight by the internal
clamping device operated by the nut head 48.
Access to this nut head is had between the spokes
of the pulley 33 and through a hole in the bear
70 ing housing 32.
During the sanding operation the suction noz
zle 2| may be secured in a position slightly above
the floor by the thumb screw 5| which may screw
on a rod 52 passing through one or more lugs
534extending upwardly from the suction nozzle
2|, and, if desired, passing through the far side
of the frame l|. Slots 54 are provided in which
the rod 52 is raised and lowered. The suction
nozzle 2| telescopes loosely within one end of
the elbow member 56 which communicates at its
other end with the fan housing l9.
When steel wool is to be used, it may be at
tached to the drum 21 in any desired manner.
The preferred way of attachment is to ?rst se
cure some very coarse sandpaper to the drum in 10
the usual manner and then wind the steel wool
ribbon onto the sandpaper covered drum in spiral
layers. The steel wool should not be wound too
close to the edge of the drum, and need not be
wound with exact uniformity, since it tends to
spread and level off in use. In winding, the drum
should be turned in the direction in which it nor
mally operates, so that as it operates it will not
unwind. A convenient manner of turning the
drum is to provide a crank, as shown in Fig. 8, 20
having a handle 6| secured to a bar 62 in which
is formed a hole 63 adapted to ?t over the pro
truding end of the shaft 29 adjacent the pulley
33. A pin 64 is provided on the bar 62 adapted
to ?t into a hole 66 in the hub of the pulley 33
for rotating the pulley 33 as the crank is rotated
by its handle 6|.
Before winding the steel wool on the drum,
the thumb screw 5| should be loosened and the
nozzle 2| drawn to its lowest position. It should 30
be understood that before the winding operation
the machine is tilted backwardly until it rests
on. the fan housing l9, and the gripping handle
l6. being steadied also by a leg 68 which is posi
tioned to be out of contact with the floor during
the operation of the machine. The steel wool
may be supplied on a roll which may be rotatably
supported on a suitable rack. '
When a sufficient amount of steel wool is wound
on the drum 21, the machine is uprighted so that
the drum rests on the ?oor. The thumb screw
5| may be left loose so that the vacuum nozzle
2| may ride along the floor, thus being auto
matically properly positioned as the steel wool
wears down. It may be mentioned that for any
operation it is preferred to raise the ?oor treat- ‘
ing member l3 off the floor while the motor is
being; started, and lower it gradually onto the
floor with the desired pressure while restraining
the machine from being moved too fast. With
steel wool it is especially desirable that the pres
.
sure be light at first until the steel wool has ad
justed itself on the drum.
On rough floors or with too heavy pressure,
comparatively large quantities of the steel wool
may be torn loose from the drum and drawn
into the vacuum nozzle. When this happens such
quantities may be too great for the fan to han
dle, and so an inspection and clean-out opening
is provided in the elbow 56, being normally cov (30
ered by a closure 69 secured in place by one or
more thumb screws '||.
When a waxed ?oor is being polished with the
polishing brush 26, it is important that the pres
sure should not be too heavy, since it might clean
the wax off rather than polish it, and, as previ
ously stated, it is desirable at all times to lower
the ?oor treating member gradually onto the
?oor. For this reason it is necessary that the
handle be rigidly secured to the machine while it
is‘in operation. At the same time, because of the
different heights of operators, it is desirable that
the handle be adjustable to different elevations.
In the present invention both of these features
are accomplished.
The handle shaft I1 is pivoted
2,127,851
between lugs 13 formed on a bracket 14 which is
secured to the motor I2 or may be secured to the
frame II.
A suitable bolt 16 passes through the
lugs 13 and a ?tting 11 on the bottom end of they
handle shaft IT, thus preventing axial rotation of
the shaft ll. Also pivoted to the bracket 14 along
an axis substantially spaced from the lugs 13 are
a pair of brace members 19 which are pivoted at
their upper ends to a split collar 8| which is tight
10 ened by a hand screw 82 and which extends
around the handle shaft l1. When the screw 82
is loosened, the collar 8| slides easily on the
handle shaft l1, thus permitting the handle to be
swung upwardly and downwardly about the bolt
15 16. When the hand screw 82 is tightened, how
ever, the collar 8| is drawn tightly around the
handle shaft l1 and anchored thereto so that
movement of the handle shaft I1 is positively
prevented.
20
_
From the foregoing it is seen that the preferred
form of the present invention may be used satis
factorily for sanding, steel wooling or polishing,
and that it is readily modi?ed for adaptation to
one or another of these purposes. It is also seen
25 that the suction nozzle is easily adjusted to the
most satisfactory position for such purpose, and
that it may be easily cleaned. Furthermore, the
machine is easily controlled by the handle which
is made both rigid and adjustable in an improved
and more convenient manner.
Although but one embodiment of my invention
has been herein shown and described, it is to- be
understood that numerous details thereof may be
altered or omitted without departing from the
35 spirit of the invention as de?ned by the following
claims.
I claim:
>
1. A ?oor treating machine including a frame, a
treating drum mounted on a shaft, and bearing
40 housings journalled onto said shaft and remov
ably secured to- said frame whereby said treating
element and bearing housings may be removed as
a unit for replacement by another such unit with
a different treating element, with one of said
bearing housings secured to the inside of one por
tion of said frame and the other bearing housing
secured to the outside of an opposite correspond
ing portion of the frame, whereby when the secur
ing means have been removed, said unit may be
51 shifted laterally away from said portions but in
only a single lateral direction.
2. A ?oor treating machine including a frame,
a treating drum mounted on a shaft, and bearing
.13
Hi
I.
1
housings journalled onto said shaft and removably
secured to said frame whereby said treating ele
ment and bearing housings may be removed as a
unit for replacement by another such unit with a
different treating element, with one of said‘bear
ing housings secured to the inside of one portion
of said frame and the other bearing housing se
cured to the outside of an opposite corresponding
portion of the frame, whereby when the securing
means have been removed, said unit may be
6.
shifted laterally and radially away from said por
tions, and a pin and hole engagement between
said bearing members and said portions for accu
rately positioning said bearing housings inde~
pendently of the securing means.
3. A floor treating machine including a frame,
70 a treating drum mounted on a shaft, a driving
belt connected with said shaft and bearing hous
ings: journalled onto said shaft and including
elongated radially extending plate structures,
means for securing said plate structures rigidly to
3
said frame but removable in a radial and sidewise
direction whereby said treating element and bear;
ing housings may be removed as a unit from said
frame and belt for replacement by another such
unit with a different treating element.
4. A floor treating machine including a frame,
a motor on said frame, a drum driven by said
motor, an abrasive surface on said drum, steel
wool on said drum on the outside of said abrasive
surface, and waste collecting apparatus including
a suction nozzle positioned so close to the floor on
which said machine is operating and so close
behind said drum as substantially to prevent
escape of particles of steel wool thrown from the
bottom of said drum as it rotates, a suction fan
connected to said nozzle by a suitable conduit,
said nozzle being freely vertically movable in said
frame and biased to rest on the floor whereby its
position is automatically maintained as the steel
wool is used up, and means for securing said 20
nozzle in a position adjacent to said abrasive
surface when the steel wool is removed therefrom.
5. A ?oor treating machine including a frame
having side walls, a slot in each side wall opening
from an edge thereof at the front portion of the
frame, a treating drum mounted on a shaft, a
drive pulley for said drum on said shaft, and a
belt on said pulley, bearing housings journalled
onto said shaft and including radially extending
plate structures, said plates each having a run 30
Way on one side thereof corresponding in shape
to the slots in said side walls, whereby said plates
supporting said bearings, shaft and treating drum
are slipped into said slots and secured against
rotation thereby, with said plates assembled to
provide the runway on the same side of each
whereby the bearing housing-treating drum as
sembly may be shifted laterally out of the slots to
facilitate removal of the belt from the drive
pulley, and means extending through said plate 40
and side walls for rigidly but removably securing
said plates to said side walls.
6. A floor treating machine including a frame
having side walls, a slot in each side wall opening
from an edge thereof at the front portion of the 45
frame, a treating drum mounted on a shaft, and
bearing housings journalled onto said shaft and
including radially extending plate structures, said
plates each having a runway on one side thereof
corresponding in shape to a slot in said side wall,
whereby said plates supporting said bearings,
shaft and treating drum, are placed in said slots
and secured against rotation thereby, with said
plates assembled to provide the runway on the
same side of each whereby the bearing housing
treating drum assembly may be shifted laterally
out of the slots, pin connections between each
wall and corresponding plate positioning and sup~
porting said plate but permitting lateral shifting,
and securing means between said plates and said
frame to rigidly retain them in said slots.
7. A floor-treating machine including a box-like
frame having a top and downwardly extending
sidewalls, a treating drum removably mounted on
said sidewalls at the front thereof, dust collecting
means at the rear of the frame including a suc
tion nozzle extending forwardly therefrom to a
position adjacent the rear of the treating drum,
and adjusting means on said nozzle extending
through a slot in a side wall between the front and
rear thereof having fastening means thereon for
adjustable frictional engagement with the side
wall.
FREDERICK E. WADHAMS.
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