US2564604A - Erasing device - Google Patents

Description

R. J EN N Y ERASING DEVICE Aug. 14, 1951 2 Sheets-Sheet 1 Filed Nov. l5, 1946 Aug. 14, A1951 R. JENNY 2,564,604

ERAsING DEVICE Filed Nov. 15, 1946 2 Sheets-Sheet 2 Patented Aug. 14, 19-51 ERASING DEVICE Rene Jenny, New York, N. Y., assignor, by mesne assignments, to Blue Robin Corporation, New York, N. Y., a domestic corporation Application November 15, 1946, Serial No. 710,084 v In Switzerland November 15, 1945 4 claims. (Cl. 12o-s6) 'I'he present invention relates to rotary erasers and is more particularly directed to instruments wherein rotary motion is manually imparted to an eraser during the erasing operation by reciprocal movement of a handle with respect to the instrument.

One of the principal objects of the present invention is to provide an erasing instrument with means in the convenient grasp or reach of the operator whereby the eraser may be adjusted and retained in the proper adjusted positions with respect to the matter to be erased upon a sheet of paper.

Another equally important object of the invention is to provide an instrument with a rotary driven eraser having a beak shaped lug which may have supporting engagement with any conventional forked type-bar guide of a typewriter and yet have an adjustable connection therewith whereby the eraser may be retained in proper erasing positions with respect to a sheet of paper having matter thereon to be erased as it passes on the platen roller of the typewriter.

Another important object of the invention is to provide an instrument having ra rotarily driven eraser with a telescopic handle whereby when not in use it maybe retained in a shorter position so as rto take up a relatively small amount of space.

A still further object of the invention is to generally improve the details of construction and arrangements of parts employed in rotary eraser instruments of the aforesaid character whereby the erasing operations will be more eiliciently performed and yet less expensive in the cost of manufacture thereby rendering the same more commercially desirable.

In the accompanying drawings:

Fig. 1 is a plan view of the instrument when contracted embodying the present invention.

Fig. 2 is another plan view of the instrument when expanded.

Fig. 3 is an enlarged longitudinal sectional view.

Fig. 4 is an enlarged transverse section taken in the line 4 4 of Fig. 3 in the direction of the arrow points.

Fig. 5 is another enlarged transverse section I taken on the line 5-5 of Fig. 3 in the direction of the arrow points.

- Fig. 6 is still another enlarged transverse secr tion taken on the line 6--6 of Fig. 3 in the direction of the arrow points.

Fig 7 is a detail bottom plan view of one end of the instrument.

Fig. 8 is a plan view of the supporting member when adjusted for use other than with the typebar guide of a typewriter. o

Fig. 9 is a bottom plan View of the same showing another adjusted position. thereof.

Fig. 1'0 is a side elevation of the instrument when applied to a typewriter having one form of type-bar guide. j,

`Fig. 11 is a similar detail View of the instrument when applied to a typewriter having another form of type-bar guide.

Fig.v 12 illustrates how the instrument is positioned when performing ordinary erasing operations, and

Fig. 13 illustrates how the instrument may be supported without the use of the type-bar guide of a typewriter when retaining the eraser.

The instrument as shown in the accompanying drawings comprises a tubular handle section I having a tapered opened end 2 and a threaded socket 3 formed in its opposite end for removably and detachably receiving a closing plug 4. Suspended concentrically within this tubular section I is a cylindrical tube 5 forming a space 6 between the inner peripheral surface of the handle section I and the outer peripheral surface of the tube 5 with a coil spring 'I freely housed therein. The cylindrical tube 5 has one end secured to the handle section I and its opposite or free end has formed therewith a bearing block 8 through which extends a spindle 9. This spindle lis provided with a threaded end to which is connected a screw nut I0 of suicient outside diameter as to freely move within the tube 5, but which when attached to the spindle,

prevents the latters withdrawal through the bearing block 8. The spindle 9 has a helical twist and extends through a correspondingly shaped opening through the block 8 whereby when the latter reciprocates along the spindle a rotary motion in opposite directions will be transmitted to the latter.

Slidable within the space 6 against the tension of the spring 'I is one end of a connector section II having a threaded plug I 2 arranged adjacent the outer or opposite end thereof to which is detachably connected .a bearing sleeve I3. I3 have a substantially L-shaped groove VIII therein as best shown in Fig. 2 of the drawings and slidable within this groove'is a pin I5 secured to the handle section I When the handle is extended due to the expansion of the spring I the pin I5 will freely slide within the longitudinal part of this groove thereby preventing the rotation of the handle section I with refy Y,

The outer periphery of the sections II and spect to the connector section II. The .pin I5 may be moved into the transverse perlpheral part of the groove I4 by giving a slight turnv when the latter is not in use or when it is beingv used for ordinary erasing operations, as illustrated in Fig. 12 of the drawings.

The helical spindle 9 extends through the plug I2 and has formed therewith an annular bearing block I6 which latter has bearing engagement with one end of the plug I2. The extended portion I1 of the spindle is preferably of a square or rectangular cross section so that when it fits within a correspondingly shaped recess of the slidable socket member I8' the latter will V.be caused to rotate therewith. This cylindrical socket member I8 has an exterior diameter slightly less than that of the opening within the eraser holding section or nipple I9 whereby it may freely reciprocate therein and arranged between the socket member I8 ,and the annular shoulder of the bearing sleeve is a light compression spring 26 which normally holds the socket member against the inturned flange 2I formed at the outer end of the nipple I9.

A chuck or eraser holder 22 is formed at one end of nippleV I9 for receiving oneend of a cylindrical eraser 23. This eraser is'preferably made witha hard centre 24 or a centre section of greater abrasive qualities than that of the surrounding outer section thereof to give to this elongated rubber eraser more rigidity which has been found more desirable during its erasing operations.

. To disassemble the various parts of the-instrument when it is desired to replace any one or all the parts thereof or when the same require cleaning, it is simply necessary to remove the plug 4 whereby access may be gained with a small screw driver through the then opened end of the tube I to the nut I0 and by removing the latter the section I and the spring 1 may be removed from the connector section I I.

By disconnecting the section I'I from the sleeve I3 the spindle 9 may be removed and by disconnecting the sleeve I3 from the eraser holding section I.9 the spring 20 as well as the socket member I8 may be removed whereby access to all of the several working parts of `the instrument may be had.

A push button assembly 25 is secured to the eraser holding section I9, as shown in Fig. 6, and comprisesa push button |25 slidably mounted on a shouldered sleeve 225, which is threadedly connected in an opening 325 to the nipple I9. A stem 425 is movable in this-opening with its inner end in abutment with the socket member I8 and its outer end in abutment with one end of a spring 525, the other end of which spring is in abutment with the button |25. The

button is normally retained in an extended posi- Formed in the outer face of the section I9 is a longitudinally extending groove 26. One end of this groove, which terminates with the outer end of the section I9, is open and the opposite side walls thereof are tapered inwardly =away from the base ofpthe'groove. 'The beak vshaped lug 21 having supporting engagement with the opposite side walls of the groove 26 will nt any conventional forked type-bar guide of a typewriter and comprises a bearing block 28 which is capable of having slidable engagement The opposite side walls of this block are :tapered so as to be received by thetapered side walls of the groove 26 in order to retain the block 28 within this groove.

"This block is split longitudinally and a tapered screw 29 has threaded engagement therewith whereby the split sections of the block may be forced into or let out of frictional engagement with the side walls of the groove for adjustably retaining the block and the lug 21 formed therewith in various positions within said groove. The block 28 has pivotally connected thereto-by means of the pin 3B a lug 3l. One end of this lug 3| is tapered to correspond with the `tapered end of the lug 21 whereas the opposite end of the=lug 6I has a resilient or non-skidding plug 32 seated therein. lWhen employing theinstrument with type-bar guides of typewriters having pressed metal forks or forks with a deep slot therebetween,l both lthe lug 21 and lug 3I lmay be inserted therein as shown in Fig. 10 of Vthe'drawings, but where .there is lonly a shallow recess between the forks ofthe type-bar guide as shown in Fig. 11A the lug SI is moved at right angles to the lug 21 so that the latter' may fit therein. When the type-bar guides of the typewriter are not employed to support the instrument the lug 3l may be turnedupon` itspivoted support until the rear or squared end thereof projects beyond the lug 21' and instrument so that the resilient plug 32 may rest upon the platen of the typewriter or other support when rotating the eraser 4in the manner as shown in Fig. 13 of the drawings.

From the foregoing it is apparent that the instrument may be compacted so as to occupy a-relatively small amount of space when not in use or when making ordinary erasing operations as illustrated in Fig. l2 of the drawings. Also, by simply inserting the lug 21 within the forked type-bar guide of a typewriter, the instrument will be supported in such a manner that with only one hand of the operator the handle I may be reciprocated for transmitting rotary movement to the eraser. The lug 21 in conjunction with the type-bar guide will direct and hold the eraser exactly upon the matter to be'erased without erasing or smearing the written matter adjacent thereto. .When the matter to be erased is ,not adjacent .to .the type-bar guide of the typewriter the instrument may still be used by usingthe non-skid end 32 of the lug as a support.

I claim:

1. An erasing instrument, for a typewriter having a type-bar guide, comprising a tubular handle, a body, means for telescopically connecting said body to said handle, an erasing element ycarried at a free end of said body, a compound member comprising a pair of superposed lugs having similarly tapered ends carried by said body, and means for pivotally interconnecting said lugs, said compound member being engageabl@ with the type-bar guide.

2. A rotary eraser, for a typewriter having a type-bar guide, comprising a tubular handle, a body, means for telescopically connecting said body to said handle, an erasing element carried at a free end of said body, means responsive to telescopic movement of said body and handle for rotating said erasing element, a member, means for adjustably and slidably connecting said member to said body, and a beak-shaped lug carried by said member engageable with the typebar guide.

3. A rotary eraser, for a typewriter having a type-bar guide, comprising a tubular handle, a body having a longitudinal groove on its exterior surface, means for telescopically connecting said body to said handle, an erasing element carried at a free end of said body, means responsive to telescopic movement of said body and handle for rotating said erasing element, a member including a block adjustably mounted upon said groove, means for retaining said block in an adjusted position, a beak-shaped lug carried by said block engageable with the type-bar guide, and a lug pivotally mounted upon said block.

4. A rotary eraser, comprising, in combination, a tubular handle, a body having a longitudinal groove on its exterior surface, means for telescopically connecting said body to said handle, a cylindrical erasing element carried at a free end of said body, means responsive to telescopic movement of said body and handle for rotating said erasing element, a member including a block adjustably mounted upon said groove, means for retaining said block in an adjusted position, a beak-shaped lug carried by said block. and an antiskidding plug disposed at one end of said lug.

RENE JENNY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 402,710 Baldwin et al May 7, 1889 834,783 Weguelin Oct. 30, 1906 933,299 Gardner Sept. 7, 1909 1,038,525 Brenenstul Sept. 17, 1912 1,281,223 Stepanchak Oct. 8, 1918 1,355,026 Austin Oct. 5, 1920 1,424,221 Trumpeter Aug.` 1, 1922 2,123,877 Booth July 19, 1938 FOREIGN PATENTS Number Country Date 24,507 Great/Britain of 1895 759,168 France Nov. 16, 1923 554,832 Germany July 13, 1932 237,799 Switzerland Jan. 16, 1947

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