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Патент USA US2113475

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April 5, 1938.
_E. FAB'ER
POLISHING MACHINE
[2,1 137175
Filed May 20, 1936
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By:
_ E. ézaben/nvemi‘or: ‘~
Patented -Apr. 5, 1938
- 2,113,415.
UNITED STATES
PATENT OFFICE _
‘2.113.431;
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romsnmo. MAcHmE
Ernst Faber, Stuttgart, Germany
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Application May 20, 1936, Serial No. stars
In Germany June 4, 1935
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(0!. 15-49)
,This invention relates to a ?oor and the like which is securely .journalled on ‘the machine .cas
polishing machine driven by electric motor with a ing d. by means of a- bow member m whichemr
pivotally attached guiding handle'and a driving braces the motor casing a frombelow. The bow
pinion which is mounted on the shaft of the
pivotally mounted motor and is pressed by weight
or spring force or both against the driving disc of
member m at the same time forms a rigid abut
ment for a helical spring 12 which acts on an v‘ex-1,5
tension 0 of the motor casing. This extension is
halso' constructed to form a treadle-p and is pro
The invention has for its object so to modif
vided at its upper arcuate downwardly sweeping
this arrangement that the weight or spring “force edge with a notch q, the object of which is to'co
if) is also utilized, while the machine is out of opera
act with a pin-like projection r of the handle 8 1°
" tion, for ?rmly securing the handle in its upright for guiding the machine, more. particularly a
the brush tool.
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inoperative position, more particularly so that
the machine when being put aside, when it is
suitably carried by means of the handle, cannot
through overbalancing fall over about the pivotal
point of the handle and strike the ground. Such
over-balancing is particularly likely to occur, when
cross-piece r of a bow-shaped extension t which '
is pivoted at either side of the machine casing on
pins t’.
"The drawing shows the machine in its inop- ‘"5
erative position, that is with the handle erect,
In this position the. canting weight of the motor
the handle is pivoted not in a central transverse and the spring n ‘press the motor extension 0
axis of the machine casing, but externally of the ' against the projection r of the handle and hold
the handle securely in its erect position, so that
20 middle, which is of advantage, since/otherwise the
machine is liable to have a jumping, motion when it is prevented in a reliable manner from sliding
in
use.
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off the extension 0, either should the handle be .
According to the invention the object aimed at knockedaor more particularly, when the machine
is realized by the provision of an extension of the tor the purpose of placing it aside is grasped by
25 ‘motor casing, which is acted on by the weight of ‘ the handle and is thus suspended from the handle 25
the motor or by the spring bearing against a ?xed‘ pivots t’ with an overbalancing weight on one,
abutment and which, when the machineis not in
use, that is when the handle is upright, bears
For putting the machine into operation the
against a projection on thehandle. At the same handle is brought into its inclined operative po
30 time the weight or the spring presses the exten
sition. 'I'o eil'ectthis it is necessary, in order 30.
sion of the motor casing against the projection to bring the handle projection r out of the notch ._
on ‘the handle which through its pivotal attach
q, ?rst to move the extension 0 downwards. For
ment to the casing oil'ers resistance, so that the facilitating this operation the extension 0 is pro
machine can be grasped by the handle for placing vided with aoplate p adapted to be depressed by
side.
it aside without it falling over in the manner
explained above and the coupling of motor cas
so
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the foot.
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35
Instead oi.’ the spring thecanting weight of
ing extension and handle projection becoming vthe motor which is suspended outside itscentre
released. Furthermore, the handle is thus se--v of gravity may su?lce, so that the spring may be
cured in a reliable manner from becoming inad
omitted, or,-if the motor be suspended in its centre
vertently released from its locked position through of gravity, the spring alone may be brought into 40
shocks or the like acting on it.
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action.
The accompanying drawing illustrates a con
structional example of the arrangement accord
ing to the invention in a vertical section, partly in
45 elevation.
at is the motor which is mounted so as to be
capable of swinging by means of two gudgeons b
disposed outside its centre of gravity in upper
lateral wings c of the: substantially cylindrical
50 casing d.
eiis the current lead and f is a driv
ing pinion mounted ‘on the motor ‘shaft. This
pinion is intended to coact with a rubber ring a '
What I claim is:
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1. In an electrically driven ?oor polishing ma
chine in combination, a machine casing, a'drivlng . ‘ _
disc rotatable in said casing, a polishing/brush 45
connected to said driving disc, a driving vmotor
pivotally mounted on said casing and having a
driving shaft with a driving pinion thereon, a
spring interposed between the machine casing
and the driving motor and arranged to tilt thesm
driving motor to apply the driving ‘pinion to the
driving disc, a handle pivotally mounted on the
bedded in the dished supporting body It surround " machine casing so as to be capable of being swung
ing the motor of a polishing disc 1. The support
from an inclined operative position into an up
.55 ing body It is arranged to rotate about a shaft k
right inoperative position, a locking projection
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2,118,475
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on the driving motor and a eo-operating locking placed against the action of the spring to release
projection on thelhandie arranged to engage the the projection on the motor i'rom the projection
projection on the driving motor and displace the on the handle.
motor against the action of the spring; onthe
3. Inran electrically driven ?oor polishing ma
handle being moved into the upright position, and chine, in combination, a machine casing, a driving
thereby maintain the two projections under spring disc rotatable in said casing, a polishing brush
pressure in engagement with one another.
connected to said driving disc, a driving motor
2. In an electrically driven ?oor polishing ma
pivotally mounted on said casing and having a
chine, in combination,'a machine casing, a driv
driving shaft with a driving pinion thereon, va
10 ing disc rotatable in said casing, a polishing brush projection on the driving motor on the end thereof 10
connected to said driving disc, a driving motor remote from the driving pinion, a spring inter
pivotally mounted on said casing-and having a posed between the machine casing and the driving
driving shaft with a driving pinion thereon, a motor and bearing against said projection so as
spring interposed between the machine casing and to tilt the driving motor to apply the driving pin
15 the driving motor and arranged to tilt the driving ion to the driving disc, a handle pivotally mounted 16
_ motor to apply the driving pinion to the driving on the machine casing so as to be capable of being
disc, a handle pivotally mounted on the machine swung from an inclined operative position into
casing so as to be capable of being swungrfrom an upright inoperative position, the projection on
an inclined operative position into an upright the driving motor having a notch therein and
inoperative position, a locking projection on the
driving motor and a oo-operating locking pro
jection on the handle arranged to engage -the
projection on the driving motor and displace the
motor against the action of the spring, on the
handle being moved into the upright position, and
thereby maintain the two projections under spring
pressure in’ engagement __with one another, the
projection on the driving motor comprising a
pedal for enabling the driving motor to be dis
the handle having a locking projection thereon
arranged to engage the projection on the driving
motor and displace the motor against the action
of the, spring, on the handle being moved into the
upright position, and engage with said notch,
whereby the handle is secured in the upright po
sition under the pressure of the spring which
maintains the-locking projection in engagement
in said notch.
,
ERNST FABER.
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