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Publication numberUS2751700 A
Publication typeGrant
Publication dateJun 26, 1956
Filing dateNov 4, 1953
Priority dateNov 4, 1953
Publication numberUS 2751700 A, US 2751700A, US-A-2751700, US2751700 A, US2751700A
InventorsWilliam E Danjczek
Original AssigneeL & C Hardtmuth Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 2751700 A
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Description  (OCR text may contain errors)

June 26, 1956 w. E. DANJCZEK 2,751,700

INDICATORS Filed Nov. 4. 1953 F/Li4.

WWII" 25 24 Y /0 1 E l) 46 m UT J3 (A N I 36 w 0 \l 1 w I 25 INVENTOR ATTORNEY 2,751,700 INDICATORS William E. Danjczek, Easton, Pa., assignor to L. & C. Hardtmuth, Inc., Bloomsbury, N. J., a corporation of New Jersey Application November 4, 1953, Serial No. 390,208 2 Claims. (Cl. 4068) This invention relates broadly to adjustable indicators, and particularly pertains to an instrument for denoting the characteristics of a writing stylus placed within a writing implement, such as a lead or crayon holder, and wherein the characteristics of the stylus, especially its degree of hardness or color cannot be determined while within the implement. Specifically this invention relates to a lead or crayon indicator for a mechanical holder adapted to accommodate such leads or crayons of diiferent hardness or color, and wherein the release of the leads from the holder to their writing position is efliected by either pressing a button or turning a part of the holder, and wherein the indicator forms a part of or is integral with such button or turning part.

The prime object of this invention therefore is the provision of an adjustable indicator for designating the charaoteristics of the lead or crayon carried at one time within a writing implement, and wherein the indicator forms a part of the device for releasing the lead or crayon to its writing position.

A further object of this invention is the provision of a lead or crayon indicator for holders, and wherein said indicator is composed of several cooperating elements which are adapted to revolve in respect to one another, one of the elements constituting an outer member housing at least two rotatable inner members, and-wherein these inner members carry indices for denoting, when set at desired position, the characteristics of the lead or crayon within the holder, and wherein the outer member is provided with a viewing aperture which facilitates the reading of only the selected indices.

A more specific object of the present disclosure is a lead or crayon indicator which forms a part of an operating button for a holder, and wherein a substantially hollow cylindrical outer member is employed within which are movable at least two inner members each of which carry a row of indices, and wherein one of the inner members constitutes either an integral part or an.

extension of the button, whereas the other inner member is substantially cup-shaped, and wherein both inner members are provided with recessed surfaces upon which the indices are located, and wherein the 'outer member is provided with an aperature for viewing selected indices of both inner members, and wherein all of the members are connected by a screw, and wherein the head of the screw holds down an expansion spring nested in the cup-- shaped inner member, whereby that latter member is caused to exert pressure against the outer member, said spring also holding all the members under tension, thereby preventing inadvertent displacement of the members relative to one, another.

The foregoing and numerous other objects and advantages of the present invention will become more fully apparent from the ensuing description in conjunction with the accompanying drawings, which latter, although forming an essential part of the present disclosure, are by no means intended to restrict the same to the actual structures shown, but rather are intended to serve for explanatory purposes, and wherein:

Fig. l is a plan view of a lead holder equipped with an indicator according to this invention;

Fig. 2 is an exploded view of the indicator construction in one of its forms;

"nited States Patent ice Fig. 3 is an enlarged vertical section through the assembled indicator as shown in Fig. 1;

Fig. 4 is a top view of the indicator;

Fig. 5 shows a modified form of the indicator;

Fig. 6 is a vertical section therethrough;

Fig. 7 shows a section through a modified form of the outer member forming a part of the indicator; and

Fig. 8 are plan views of strips carrying indices employed in the indicator.

The illustration shown in Fig. 1 denotes a simple lead holder composed of a barrel 10, a nose piece 11 and a collet 12, the latter being adapted to engage and hold a lead released from the holder to its writing position. At the upper end of the barrel there is a depressible button .13 which is adapted, when depressed, to move collet 12 in outward direction to its lead-releasing position. The button is normally urged by a spring, not shown, to the position illustrated. When the button is first depressed and then released, collet 12 will grip the lead and hold it.

Button 13 supports as an integral part thereof a lead indicator 14, shown in greater details in Figs. 2 and 3. The button is removably attached at one end of lead holding tube 15 (Fig. 2), while with the other end of the tube collet 12 is removably associated. The body of button 13 is recessed at 16 to form a ledge and adjacent to the ledge there is provided another recess or reduction 17 upon which are either directly marked or to which are otherwise applied indices or color designations carried upon strips, such as shown, for example, in Fig. 8. The button body and its portion including ledge 16 and reduction 17 may be considered as one of the inner elements of the indicator denoted generally at 18. Ledge 16 is adapted to operatively support and guide an outer member 19 which comprises a hollow cylinder provided with a viewing opening 20. Y

A second inner member 21 of the indicator comprises a substantially cup-shaped structure having an end flange 22, which is preferably larger in diameter than cylinder 19. Adjacent to flange 22 there is provided a ledge 23, similar to ledge 16 of the first-mentioned inner member, and adjacent to ledge 23 is abody reduction 24, similar to reduction 17. Reduction 24 again carries indices which are either applied directly to its outer surface or which are borne by one of the strips shown in Fig. 8 at 25 and 26.

At the bottom of cup-shaped member 21 is a central aperture 27. Within member 21 there will be observed a spring 28 bearing with one of its ends against the bottom of member 21, while its other end engages head 29 of a screw 30, which latter is adapted to connect all three members of the indicator. Just below head 29 of the screw is a cylindrical portion 31 which rests against the upper face of inner member 18. Threaded portion 32 of the screw engages a correspondingly threaded hole 33 within button body 13.

The modified form of the device illustrated in Figs. 5 and 6 is intended to form a part of a fixed end 34 of lead holder 35 provided with a lead-clutching nose piece, not shown in the drawings. Fixed end 34 is provided with a central bore 36 which is internally threaded to receive threaded end 37 of screw 38. In this modified form there are again employed two inner members, one denoted at 39, which may be considered as a continuation of end 34, and may even form a part thereof, although in the illustration this member is shown as a separate unit. The other inner member 40 is very similar to member 21 in that it is cup-shaped and is provided at one end with a flange 41 and has two body reductions 42 and 43, similar to recessed portions 23 and 24, respectively, of member 21. Inner member 39 is also reduced first at 44 and again at 45. Recessed portions 43 and 45 of the respective inner members are again provided with indices-bearing strips 25 and 26 shown in detail in Fig. 8. Inner member 39 is preferably offset at what may be considered its outer end to provide a reduced central portion 46 which has a clearance hole 47 for the reception of threaded portion 37 of screw 23. The head of the screw again holds down a spring 48 disposed within the cup-shaped interior of inner member 40.

The provision of reduced end portion 46 of inner member 39 causes the formation of a recess 49, the purpose of which will become presently evident.

The shape of the outer member 50 in Fig. 6 is somewhat modified, but again constitutes a substantially hollow cylindrical structure having an elongated view opening 50'. Additionally, the cylinder is provided with a centrally perforated bottom 51 which extends into recess 49 and operates about reduced central portion 46 of member 39. Forming an outward extension of bottom 51 is a flange 52 by means of which cylinder 50 can be rotated. The smooth cylindrical portion 53 of screw 38 bears with its lower end against inner member 39 and holds the latter against rotation.

In Fig. 7 there is shown a modified form of an outer member 55 similar to member 59 seen in Fig. 6. This modified outer member has a centrally recessed bottom 56 and a view opening 57, but does not possess an operating flange. Nevertheless, it can be used in place of cylinder 50 in arrangements similar to that shown in Fig. 6.

Operation In Fig. 8 are indicated three indices-bearing strips 25, 26 and 54. Strip 26 carries indices H, 2, 3, 4, and 6, while strip has indices H, B. F, 7, 8 and 9. For leads of different degrees of hardness the two strips 25 and 26 are applicable, On strip 54 are shown dots denoting different colors; that strip can be applied to either of the two inner members of the indicator as shown in Figs. 3 and 6, or can be carried by a separate third inner member, not shown.

When it is intended to designate a certain hardness of lead held within holder 10, the body of button 13 in Fig. 3 or the fixed end 34 of Fig. 6 of the holder are held, while cylinders 19, 50 are rotated until their respective viewing openings 21 50 expose the desired digit borne by inner members 18, 39. Now the cylinders and members 13, 39 are held together against turning, and members 21, 40 are rotated until the desired index on these members appears in the viewing opening. Expansion springs 28, 48 within the cup-shaped inner members hold all three members in their set adjustment and prevent their accidental displacement.

Referring again to Fig. 8, the index strips 25 and 26 disclose six digits and a blank space adjacent the letter H. The space on strip 26 is required to permit the adjustment of the indicator to show only one of the letters H, B or F. By the use of the two strips 25 and 26 with their respective six digits it is possible to effect seventeen different digit combinations denoting various hardness degrees or grades of leads. Thus when a holder capable of accommodating difierent leads or crayons is provided with the present indicator, a considerable saving is effected in that one such indicator-equipped holder replaces a substantial number of individual holders bearing imprints denoting the specific lead degrees they hold.

The two modifications shown in Figs. 1 and 5 disclose indicators for users holding writing implements in their right hand. By reversing the direction and changing the position of strips 25 and 26, that is by attaching strip 26 in place of strip 25 and strip 25 in place of strip 26, the indicators can advantageously serve left-handed users. By altering the arrangement of the digits on the strips, a great number of variations in lead indicating combinations may be effected.

In each of the two presented modifications it is to be specifically noted that all of the three parts of the indicators, that is the two inner members and the outer cylindrical member, are movable relative to one another, .and that when one inner member and the cylinder are held til) together against rotation, the second inner member can be adjusted in respect to the two held-together members.

In the foregoing description only two specific forms of the present invention are dealt with. This applies particularly to the use of only three relatively movable indicator members and to the specific arrangement of the indices-bearing strips. It is quite obvious that there may be employed more than three relatively movable indicator members and that the arrangement of the indices 0n the strips may be changed. Thus, for instance, one of the strips may be equipped with double designations, such as H8 or 7B placed, for example, into the empty space above the letter H on strip 25. By the same token other letter and number combinations may be substituted for those shown in Fig. 8.

When it is desired to provide an indicator for holders which will not only accommodate leads of different degrees of hardness but also crayons of different colors, the indicator can be equipped either with a fourth member bearing the color indications, or one of the three members, including the outer cylindrical member, can be equipped with a color indicator. Such modifications being obvious, they are not shown in the drawings, but are intended to indicate the possibility of necessary changes to meet various requirements, such changes being deemed to reside within the scope of the present invention, as defined in the annexed claims.

What is claimed as new is:

1. In an adjustable indicator for lead holders and the like, a plurality of individually rotatable cooperating elements tensionally biased in respect to one another, said elements comprising two substantially cylindrical indicesbearing inner members in abutment with each other at one end, their inner ends and a tubular outer member having a single viewing aperture extending over the major portions of both inner members, annular shoulders formed at the outer ends of the inner members and serving as abutments and for rotatably supporting the ends of the outer member, one of the inner members being cupshaped and having a central opening at its bottom, the other inner member having a threaded central bore, a screw having a head and a shoulder and a threaded portion extending from the shoulder, the head and shoulder of said screw being disposed within said cup-shaped member and passing with its shoulder through the central bottom opening of that member, the threaded screw portion engaging the bore of the other inner member so that the end of the shoulder abuts with the latter member, a compression spring disposed between the head of the screw and the bottom of the cup-shaped member, thus holding all three members under constant tension.

2. In an adjustable indicating device, the combination of three relatively adjustable rotary elements comprising two inner cylindrical elements abutting with one another and one outer tubular element, said inner elements having adjacent portions of a uniform diameter and double shoulder formations of larger diameters at their remote ends, the outer element engaging and being supported at its ends by said double shoulder formations of the inner elements, one of the inner elements being cup-shaped and having a central aperture at its bottom, a headed and shouldered screw connecting the elements so that its shoulder passes through the aperture of ghe cup-shaped element and forcibly engages with its end the abutting face of the other inner element, a tension spring extending between the screw head and the solid bottom portion adjacent the aperture in said cup-shaped element, whereby all three elements are kept under tension.

References Cited in the file of this patent UNITED STATES PATENTS 636,593 Vitanolf Nov. 7, 1899 2,339,514 Ponath Jan. 18, 1944 2,575,096 Chatelain Nov. 13, 1951

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US636593 *Jun 5, 1899Nov 7, 1899George Nickola VitanoffCalendar attachment for penholders or pencil-cases.
US2339514 *Jun 6, 1941Jan 18, 1944Eagle Pencil Company IncIndicating device for mechanical pencils
US2575096 *May 19, 1949Nov 13, 1951 Multicolor refillable pencil
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6287036 *Jun 9, 2000Sep 11, 2001Kotobuki & Co., Ltd.Knocking writing utensil
US6612766Dec 7, 2001Sep 2, 2003Mark G. CollinsWriting instrument
US6742953May 20, 2002Jun 1, 2004Bic CorporationWriting instrument with display window
US7802936 *Oct 15, 2008Sep 28, 2010Mitsubishi Pencil Co., Ltd.Mechanical pencil
CN101873938BOct 15, 2008May 30, 2012三菱铅笔株式会社Mechanical pencil
U.S. Classification40/334, 401/94, 401/194, 40/905
International ClassificationB43K29/00
Cooperative ClassificationY10S40/905, B43K29/00
European ClassificationB43K29/00