Патент USA US2115806код для вставки
May 3, 193-8. c. FREDERICK‘) 2,115,806 ’ ERAS ING DEV'ICE Filed Aug. 17, 1937 . 151.1; $041,879 "/i’ IN VEN TOR. BVY Q7“ I. 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is to provide means for closing or sealing the erasing element within the container when the erasing element is in its withdrawn or In this way the rubber is 1 0 retracted position.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.