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Патент USA US2115806

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May 3, 193-8.
c. FREDERICK‘)
2,115,806 ’
ERAS ING DEV'ICE
Filed Aug. 17, 1937
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151.1;
$041,879
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IN VEN TOR.
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A TTORNEYS.
2,115,805
Patented May 3, 1938
UNITED, STATES PATENT‘ OFFICE‘.
2,115,806
ERASING DEVICE
Charles Frederick, C‘olumbiana, Ohio
Application August 1'7, 1937, Serial No. 159,590
8 Claims. (Cl. 120-36)
My invention relates to erasing devices.
Objects of the invention are to provide an im
plement comprising an erasing element of rubber
or the like normally enclosed within a casing of
5 metal or its equivalent and projectable therefrom
into operative position. An important object of
the invention is to provide means for closing or
sealing the erasing element within the container
when the erasing element is in its withdrawn or
In this way the rubber is
1 0 retracted position.
kept clean and the device may be conveniently
carried in the pocket, in a purse, a desk drawer
or the like.
I
A further object is to incorporate in the casing
15 means capable of ready and easy manipulation
to project an operative end of the erasing ele
advantages will be evident to persons skilled in
the art from the following description of the
principles of the invention as incorporated, in a
preferred form of embodiment.
In the drawing, which illustrates such preferred 5
embodiment, which has been found to be entirely
operative and practical, and is therefore at pres
ent preferred by me, although I recognize that
the invention may be otherwise and differently
embodied,
10
Figure 1 is a plan view of one face of the
device with one of a plurality of erasing elements
shown projected into operative position;
Fig. 2 is a plan view showing the opposite face
of the device with the parts in the position shown 15
in Fig. 1;'
grip the extended end of the erasing element 1
exposed, operative position.
20
'
An additional object is to provide a structure
of the class described, which may be very inex
pensively made of strong, durable material and
which will function e?iciently throughout a long
period of life, during which worn out erasing ele
2'5 ments may be replaced by new ones.
Attempts have been made heretofore to en
'
Fig. 3 is a side elevational view of the device
ment from an end of the casing and to hold or
in the position shown by Figs. 1 and 2;
Fig. 4 is’ a longitudinal sectional view taken
on thelinelL-ri of Fig. 2; and
20
Fig. 5v is a cross sectional view taken on the
'
line 5—5 of Fig. 2.
_
Referring to the drawing, the device includes
case rubber erasers in casings of metal or the
a casing I, conveniently made of metal and pref
erably comprising a pair of inter?tted channel .25
portions 2 and 3. The proportions of the chan
nels. are such that the relatively narrow side
like from which the erasing element may be pro
jected for use and into which the element may
30 be withdrawn between periods of use. In all of
somewhat wider side ?anges of the portion 3, ,
and the engaged pairs of ?anges are secured to- ‘30
these prior art devices, so far as I am aware,
there are inherent disadvantages. Notable among
them is the failure of these devices to include
closure means for the casing to protect the re
35 tracted rubber element from contamination by
dust and dirt. Again, the best of the prior art
devices with which I am acquainted is incon
venient to use because it is necessary for the
?ngers of the user to exert a compressive grip on
40 the casing or the rubber element ‘or both when
the rubber is extended for erasing use.
My
present invention proposes an eraser casing hav
ing a closure for sealing the rubber or the like
within the casing when the device is not in
45 erasing use, and the invention also contemplates
automatically gripping or holding the rubber in
projected position by a simple preliminary move
ment of the parts, so that none of the user’s
attention or strength need be devoted to holding
50 or gripping the rubber in extended position when
an erasing operation is being performed.
The structure contemplated by the invention
includes several novel constructional and manu
facturing features which combine to produce an
55 inexpensive and highly ef?cient article. These
flanges of the portion 2 are engaged within the
gether, preferably by electric welding, although
other fastening means, as for example, rivets, pins
‘or the like, may be employed. ,
The casing I is open at one end, if a single ’
erasing element is to be built into it, or it may be 35
and preferably is open at both ends, thus per
mitting the use of two erasing elements. The
latter construction is preferred because, among
other reasons, it permits the use of two different
kinds of erasing elements, as for example rubbers .40
of different characteristics, one capable of erasing
pencil marks and the other capable of erasing ink
marks, or an erasing element may be contained
within one end portion of the casing and a brush
or the like may be contained within the other end 45
portion.
I
v
_
7
One face of the casing is slotted centrally as
shown at 4. The slot preferably lies relatively
near the open end of the casing. If both ends of
the casing are left open, as has been explained .50
above, a companion slot‘ 5 is formed in thecasing
near its other end.
Slidably mounted within the casing is an. eraser
‘holding or backing means 6. This element may,
for structuralstrength, be provided in theform ‘55
2
2,115,806
of a very shallow channel, preferably wide enough
to make a snug ?t with the casing interior. The
rear or inner end of the slide 6 terminates in an
outwardly directed neck ‘I, extending relatively
snugly through the slot 4 and terminating in a
widened handle or manipulating element 8 which
is wider than the slot and lies in a plane parallel
to that of the body of the slide 6. The arrange
ment is such that the tab‘ or handle 8 is movable
10 along and substantially in contact with the cas
ing exterior adjacent to it. When the tab is
moved toward the end of the casing, the end of
the slide is projected through the opening at
the end of the casing, and when the tab is moved
15 oppositely the slide becomes wholly contained
within the casing.
The slide is adapted loosely to receive an eraser
element 9 of rubber, rubber composition or other
suitable material. The element 9 is made slightly
20 smaller in cross sectional shape than the casing
space which receives it, so as to prevent binding
of the rubber between the casing and slide parts.
A tang or equivalent means II] is struck up from
the ?oor of the slide near its outer end portion.
25 The function of this tang or prong is to enter
the rubber and move the eraser element out with
the slide when the slide is projected. Obviously
other means may be employed for this purpose,
as for example a turned up rear end wall for the
30 slide, provided in the region of the neck 'I.
50 Ul
both ends of the device if an eraser and slide be
provided at each end.
With reference to the angular ?ange II, it is
pointed out that a preferred embodiment com
prises formingslide side walls I3 on the ?ange. 10
These side walls help to guide and ?x the line
of the projected eraser element 9. They also
strengthen the ?ange. If desired, they may be
proportioned so as to intersect the plane of the
upper face of the casing, in which event short 15
slots I4 may be provided in this face of the casing
to receive the end walls I 3.
As has been stated, it is recognized that the in
vention may be emodied in other and further
modi?ed forms. All such modi?cations, to the 20
extent that they incorporate the principles of the
invention as de?ned by the appended claims, are
to be deemed within the scope and purview
thereof.
I claim:
25
1. An erasing device comprising a casing open
at an end and having a slot formed in one of its
sides, an eraser holder slidable in the casing hav
ing a handle portion extended. through the slot,
and a flange formed on the outer end of the hold 30
er adapted to close the end opening of the casing
when the slide is retracted within the casing.
2. An erasing device comprising a casing open
at an end and having a slot formed in one of its
sides, an eraser holder slidable in the casing hav
as shown in Figs. 3 and 4, so that when the eras
ing a handle portion extended through the slot,
40 rying the erasing element with it, and the ?anged
end I I will form a closure for the otherwise open
end of the casing. In this way the retracted rub
ber is protected from contamination by dirt and
the like when the eraser is not in use.
The angular disposition of the flange II per
mits the rubber 9 to be relatively withdrawn to a
slight extent from the slide 6, when the slide is
projected, and then the slide may be withdrawn
partially into the casing, while the end of the
rubber remains relatively projected, so as to grip
and compress the end portion of the rubber be
tween the end of the casing and the ?ange. This
disposition of the parts is shown at the left in
Figs. 1, 2, 3 and 4. The movements preparatory
to this disposition are illustrated in dotted lines
55
at the right in Figs. 3 and 4. Referring to these
?gures, the retracted position of the parts is
shown in full lines in Fig. 4. From this position
the slide and erasing element are projected to
gether, as shown at the right of Fig. 3. The eras
60
ing element is then projected slightly beyond the
65
prongs or the like I2, struck up from the inclined
?ange II, may be used to engage the end of the
rubber and push the rubber along with the slide.
The operations thus described are the same for
The outer end of the slide or backing 6 is
?anged upwardly as shown at I I. Preferably this
?ange forms an angle of the order of 45° with the
slide floor, and it terminates at its upper end at
approximately the level of the upper casing wall,
ing element 9 lies ?at on the floor of the slide,
as shown in dotted lines at the right of Fig. 3,
the slide may be retracted within the casing, car
.45
gether into the casing. In this latter movement
outer end of the slide, as shown in dotted lines
in Fig. 4. The slide is then retracted into the
casing as far as possible, whereupon the extended
end of the erasing element becomes jammed or
gripped in the casing opening, as shown at the
left in Figs. 1, 2, 3 and 4, and the erasing opera
tion may be conducted with great facility and
convenience.
The eraser is restored and the device closed by
70
the reverse of the foregoing movements. The
slide is ?rst projected to release the grip on the
rubber, the rubber is then pushed inwardly into
the casing while the slide remains projected, and
the slide and rubber are then moved inwardly to
35
and a ?ange formed on the outer end of the
holder adapted to c-lose'the end opening of the
casing when the slide is retracted within the
casing and adapted to compress an extended end 40
portion of an eraser against said end of the cas
ing when the eraser is extended from the holder
and the holder is extended from‘ the casing.
3. An erasing device comprising a casing open
at an end, a backing for an eraser slidably 45
mounted within the casing and having a ?anged
end normally closing the casing opening and seal
ing the eraser in the casing, and means for ex~
tending the eraser and its backing through the
casing opening and holding the end portion of the 50
eraser extended in operative position from the
casing.
4. An erasing device comprising a casing open
at an end, a backing for the eraser slidably
mounted within the casing and having a ?anged 55
end normally closing the casing opening and
sealing the eraser in. the casing, the eraser and
backing being movable with respect to each other,
and means for extending the backing through the
casing opening with the eraser extended from 60
the backing and compressed between the backing
?ange and the end of the casing.
5. An erasing device comprising a casing open
at an end, a backing for the eraser slidably
mounted within the casing and having a ?anged (i5
end normally closing the casing opening and seal
ing the eraser in the casing, and means for pro
jecting the backing and the eraser as a unit
through the end opening of the casing, the pro
jected end portion of the eraser being detach 70
able from the backing and adapted to be extended
beyond the backing for compression between the
casing and the ?anged end of the backing.
6. An erasing device comprising a casing open
at an end, a backing for the eraser slidably
3
2,115,806
mounted within the casing and having an oper
ating element extending through a slot in the
casing, a ?anged end formed on the backing nor
mally closing the casing opening and sealing the
eraser in the casing, and means carried by the
backing and engaged with the eraser for moving
the eraser with the backing when the backing is
projected through the end opening in the casing,
said means being disengageable from the eraser
gageable from the eraser whereby the eraser may
be extended beyond the projected backing and
compressed in operative position between the ad
jacent ends of the backing and easing.
8. An erasing device comprising a casing open
at an end, a backing for an eraser. slidably
mounted within the casing, a ?anged end formed
on the backing normally closing the casing open
ing and sealing the eraser in the casing, means
whereby the eraser may be extended beyond the
carried by the backing and engaged with the 10v
projected backing and compressed in operative
eraser for moving the eraser with the backing
position between the adjacent ends of the back
when the backing is projected through the end
opening in the casing, said means being disen
gageable from the eraser whereby an end portion
of the eraser may be extended beyond the pro 15
ing and casing.
'7. An erasing device comprising a casing open
15 at an end, a backing for an eraser slidably
mounted within the casing, a ?anged end formed
on the backing normally closing the casing open
ing and sealing the eraser in the casing, and
means carried by the backing and engaged with
20 the eraser for moving the eraser with the backing
when the backing is projected through the end
opening in the casing, said means being disen
jected backing and compressed in operative posi
tion between the adjacent ends of the backing
and casing, and a projection formed on the back
ing engageable with said end portion of the eraser
for moving the eraser with the backing when the 20
backing is returned into the casing.
-
CHARLES FREDERICK.
CERTIFICATE OF CORRECTION...
Patent No. 2,115,806..
may 3; 1958.
CHARLES FREDERICK. I
> It is hereb;r certified that error appears in the Iiprihted specification '
of the above numbered patent requiring correction as follows: Page, 'second '
column, lines 5h, 6).“ and 75,‘ claims 14., 5, and 6reepeotive1y,1_'for "the"
read in; and that the said Letters Patent) should be readvwith this correction‘
therein that the same ‘may conform to the record of they casein the Patent
Office.
.
’
‘
_
'
.
>
'
Signed and sealed this 1mm day of June, ' A. D. 1958.
-
(Seal)
}
Henry Van Arsda'le,
_
, Aotingxcommi'ssioner of Patents.
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