US1719976A - Pencil or like holder - Google Patents

Description

July 9, 1929,- G. s. M. GRIMMER PENCIL OR LIKE HOLDER 2 Sheets-Sheet l Filed March 2l, 1928 .NN .vNN

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ATTORNEK July 9, l929 G. s. M. GRIMMl-:R

PENCIL OR LIKE HOLDER 2 Sheets-Sheet 2 Filed March 21, 1928 Nm Nf AM. mw mm w l mwmww a a wmmllww @MN -i mw ww W l M J A n/ 1mm mw Nm MPT@ .mmww Sw Rmmwmmmmmw ai NVENTOE.

ATTORNEY Patented July 9, 1929.

GEORGE' SEKEFFINGTON MILNE GRIMER, 0F LONDON, ENG-LAND. l

EENCIL OB LIKE HOLDER.

application flied March 21, 19213, Serial No. 263,260, and in Great Britain August 17, 19mg 'lhis invention is tor improvements in or relating to pencil or like holders ot the type wherein the point ot' the lead can be sharpened by moving the latter axially between sharpening members that are reslliently attached to the pencilholder. ln one known construction ot this type, the sharpening members consist ot two serrated, tile-like, or otherwise roughened, jaws, carried by converging spring strips, which ]a\vs operate on the'lead as it is rotated in and out ot the holder by the propelling mechanism. 0

.Olne object ot t-he present invention 1s to provide an improved device ot the aioresaid type, in one :torna ot which a 'chlsel-point can be produced on the lead, s uch as .is cornmonly used by draughtsmen 1n making engineering or other drawings. n

Jltccording to one teature of the present 1nvention, in a pencil or like holder, et the type reterred to, the lead is mounted in a springcontrolled carrier (e. a plunger) slidably arranged in the holder in such a manner as to permit ot the lead being moved inwardly between the sharpening members which are in the form ot chisel-edge cutters (against the action ot the spring) by the application ot pressure to the point ot the lead and being moved outwardly between said members by the spring when the pressure is released.

'lfhe term chisel-edge cutters herein is inltended to include cutters having either a straight or curved continuous cutting-edge as distinguished trom sharpening members having hie-like cutting surfaces.

Conveniently, the lead-carrier is slidable within a guide which is so arranged within the holder as to be adjustable along it to vary the normal position ot the lead-carrier in re-y lation to the holder.

According to another feature oi' the invention, there is provided in a pencil or like holder. according to either ot the last two preceding paragraphs, a device movable with the lead-carrierand cri-operating with the sharpening members to cam the latter on to the lead at each cutting stroke.

The invention also comprises means (for example, a fixed -pin co-acting with a calngroove on the lead-carrier) for producing a partial rotary movement of the lead-carrier during its axial movement in one orboth directions, or between successive axial movements.

According to a further feature of the invention, means are. provided whereby the lead can be locked in its operative position, for eirample, a cap adapted to press the sharpening neibers inwardly sufficiently to grip the The invention also includes a pencil or like holder, pt the type described, wherein the sharpenlng members have chisel edges and the lead is mounted for reciprocation between said edges in a carrier so arranged that the lead is constrained against rotational movement in relation to the edges aforesaid so as to produce a chisel-point on the lead. F or 'a more complete understanding ot the invention, several constructions in accordance therewith will now be described by way ot example with reference to the accompanyino" drawings, in whichlgure' 1 is a sectional elevation oit one embodiment oit the invention;

Figure 2 is a plan thereoii',l

Figure 3 is a sectional elevation et a modilication; Y

Figure el is a plan oit the latter;

Figure 5 is an elevation, partly in section, oit another modification;

lig. in is a view showing the development ot the cam groove shown in Fig. 5.

llllgnre 6 is a sectional elevation of still another modification;

lligure i? is a plan, partly in section, oi the latter modihcation;

Figure tl is a section on the line --d ot Figure 6, and

Figure 9 is a perspective view ot the lead- .carrler employed in the construction shown 1n Figure 6. Like reference numerals indicate like parte 1n the several views of the drawings.

The pencil-holder shown in Figures 1 and 2 comprises a hollow cylindrical body 10 ot metal, or other suitable material. This body part is closed at one end by a screw-cap 1l, and at the other end by a hollow conical endpiece 12, through which the lead 13 normally projects. The lead 13 is mounted in a stationary guide-member 2.3, and the inner end of the lead is received in a lead-carrier 14 provided with a collar 15. Between said collar and the cap 11, a spring 16 is arranged. The lead-carrier is mounted in a guide 17 which can be adjusted axially of the pencil-holder by means of a screw'18, engaging a slot 19 in the holder, so that by adjusting saidi guide along the pencil-holder, the amount of eX- posed lead can be varied at will. Mounted on the end-piece 12 are two spring sharpening-blades 20 which press against the lead `beyond .the outer extremity of the end-piece desired length of lead, and the pencil-holder is held with the point ofthe lead against some solidobjeet, for example, a table, and pressed against the action of the spring 16, during which operation the sharpening-blades 2O remove a portion of the lead. The pressurc.\

is then released, and the lead returns to its vnormal position under the action of said spring. lThis operation is repeated until a chisel-point of the desired sharpness has been obtained.

In the construction shown in Figures 3 and 4, the guide 17 is fixed in a tubular-member 21 by a pin 22. l The tubular-member 21 is screwed into one end of the body part 10 so that the length of exposed lead can be adjusted by screwing the member 21 in or out of the part 10. The guide-member 23 for the lead is screwed into the other end of the body part 10, and the spring sharpening-blades 2O are mounted on said guide-member. Slidably mounted on the body part 10 is a cap 24, having a conical outer end 25, provided with two slots 26 to accommodate the sharpening blades 20. A spring 27 is disposed between a shoulder' 28 on the guide-member 23, and a stop 29 on the interior of the cap 24. A pin 30 mounted in the guide-member 2 3, projects into a guide-slot 31 in the cap 24.

ln the foregoing construction, when pressure is applied to the pointed end of the lead, the latter is moved backwardly against the action of the spring 16 until the point of the lead is level with the outer end of the cap 24.

Continued pressure then causes the said cap to slide backwardly over the body part 10, against the action of the spring 27, and this movement of the cap causes the latter to press the sharpening` blades 2O against the lead with a cam-like action and with a pressure which increases as the lead moves inwardly. When the external'pressure is released. the

' parts return to their normal positions under the action of their respective springs 16 and 27.

Both these specific constructions hereinbefore described produce a chisel-point on the lead as the latter has only an axial movement within the holder. In the modification shown in Figure 5, the pin 22 extends into a cam-groove 32 in the lead-carrier 14. This cam-groove which extends cireumferentially of the lead-carrier is of zig-zag formation and is so shaped that 'at each bend thereof the vapical point at one side of the groove is offset relatively to the corresponding recess at the other Side 0f the cam-groove. Each apical point on each side of the groove is joined to the adjacent recess by a substantially straight portion, so that each side of the groove presents a number of substantiall triangular-shaped teeth. When the lea@ -carrier is at the end'of its forward stroke, the pin 22 is in engagement with one of the recesses in the rear side of the groove, so that the lead-carrier is not rotated during its rearward movement until, by reason of the aforesaid off-set arrangement, said pin engages-the other side of the cam-groove on one side of the apical point thereon corresponding to the recess in which the pin was' seated prior to this movement.

, said pincngages a substantially straight portion of the rear side of the groove, The leadcarrier is then again rotated in the same direction as before. The cam-groove is so shaped that for every complete stroke of the leadearrier a given angular movement will be imparted to the lead and always in the same direction; thus, there is a certain amount of lost motion while the pin -is passing from one portion of the groove to tbe next, and the lead-carrier 14 is partially rotated only at the end of each stroke. By this means a round point is produced on the lead. Y

Referring now to the construction shown in Figures 6 9, inclusive, the pencil-holder comprises ainain body part 10, a tubularmember 21, a sleeve 33, and a cap 24. The tubular-member 21 is rotatably mounted in the body part 10, and is operatively connected to the lead-carrier.l for the purpose of advaneing or retracting the lead within the holder, by means of a bar 34, which is slidably mounted axially of the holder within a slot 35 in the inner end of the tubular-member 2l, see Figure 8. The bar 34 is secured to a tubular-member 36, rotatably mounted in the body part 10, and provided with a quick-pitch thread which co-aets with a pin 37 fixed in said body part. The tubular-member 36 constitutes a guide for the lead-carrier 14, which, in this construction, is formed in two parts, (see especially Figure 9), whereof one part-is a sleeve 38 which is loosely mounted between two collars 39, 40 on the other part 41 of the lead-carrier with suicient clearance to permit endwise movement. l

The cap 24 is a sliding it on the portion 42 of the body part 10, and the sleeve 33 surrounds the cap 24. The sleeve 33 is provided on its interior surface with projections 43 adapted to eo-act with projections 44 on the fil Vperiphery of the portion 42 to prevent longishoulder 40, is adapted to engage ratchetteeth 53 on the adjacent end of the sleeve 38. A spring 27 is arran ed between a shoulder 28 on the guide-mein er 23 and a stop 29 on the interior of the cap 24.

The operation of this construction is as follows. The sleeve 33 is set so that an indicating line 54 thereon coincides with a setting line 55 on the body part 10 of the holder, in which position of said sleeve the pin 45 is located at the rear end of the longitudinal slot 46 in the cap 24. With the cap in this position, the lead 13 can be pressed back against the action of the spring 16, until it is level with the outer end of the cap 24', when continued pressure will cause the said cap to move backwardly against the action of the spring 27 and to press the blades 20 against the lead with an increasing pressure as the latter moves inwardly, thus removing a portion of the lead. During this stroke, the lead does not rotate as the tooth 52 is out of engagement with the ratchet-teeth 53. When the external pressure on the point of the lead is released, the cap 24 is caused to move forwardly by the spring 27, and the pressure of the blades 20 on the lead is relaxed. The leadcarrier 14 then moves forwardly under the action of the spring 16 and the tooth 52 is caused to engage the ratchet-teeth 53 with the result that the lead-carrier. and consequently the lead, will be partially rotated. The foregoing operations are then repeated for a sufficient number of times to produce a point of the desired sharpness. In order to lock the lead in position for writing, the cap 24 is depressed against the spring 27 until the sleeve 33 can be turned so that the pin 45 will enga-ge the transverse slot 47, this position being indicated by the coincidence of the indicating line 54 with a setting line 56 onI the body part 10. If it is desired to remove the cap 24 for refilling, or other purposes, the said cap is pressed inwardly against the spring 27 until the pin 45 can be turned to engage the end of the transverse slot 48 in alignment with the longitudinal slot 49, which position is indicated when the line 54 is coincident with the setting line 57. In this position, the cap 24 can be readily withdrawn from the holder. Obviously, the cap can be replaced by a reversal of the foregoing operations.

It is to be understood that the invention isnot restricted to the precise constructional details described, i as, obviously, several changes can be made without departing from the invention.

1. In a pencil or like holder of the type referred to, the combination of sharpening members in the form of chisel-edge cutters arranged about the lead near the forward end of the holder and a lead-carrier which is slidably arranged in the holder and controlled b a spring in such manner as to permit of t e lead being moved inwardly between the sharpening members against the action of said spring by the applieation'of pressure to the point of the lead and being moved outwardl between said members by the spring willen the pressure is released.

2. A pencil or like holder of the type referred to, comprising in combination sharpenmg members in the form of chisel-edgecutters arranged about the lead near the forward end of the holder,a spring-controlled lead-carrier, a guide in which the lead-carrier is slidably mounted, and means whereby said guide can be adjusted along the holder to vary the normal position of the lead-carrier in relation to the holder.

3. In a pencil or like holder of the type referred to, the combination of sharpening members in the form of chisel-edge cutters arranged about the lead near the forward end of the holder, a lead-carrier, a guide-member for the lead at the front end of the holder, a guide in which the lead-carrier is slidably mounted, and a spring for urging the leadcarrier forwardly in the pencil holder,4 all so arranged as to permit of the lead being moved inwardly between the sharpening members by the application of pressure to the point of the lead and being moved outwardly between said members by said spring when the pressure is released so as to produce a chisellike point on the lead by the reciprocation gf the latter between the sharpening memers.

4. In a pencil or like holder of the type referred to, the combination of sharpening members in the form of chisel-edge cutters arranged about the lead near the forward end of the holder, a lead-carrier which is slidably arranged in the holder and urged forwardly by a spring in such manner as to permit of the lead being moved inwardly between the sharpening members against the action of said spring by the application of pressure to the point of the lead and being moved outwardly between said members by the spring when the pressure is released, and means for forcing the sharpening members on to the lead at each cutting stroke. l

5. Ina pencil or like holder of the type referred to, the combination of sharpening members in the form of chisel-edge cutters arranged about the lead near the forward end of the holder, a lead-carrier which is slidably arranged in the holder and controlled by a wardly between said members by the spring when the pressure is released, and a device -movable with the lead-carrier and arranged to force the sharpening members on to the lead at each cutting stroke.

6. A pencil or like holder of the type referred to, comprising in combination a springcontrolled reciprocatable lead-carrier mounted within the holder, a guide-member for the lead at the front end of the holder, sharpening members in the form of spring-blades mounted on said guide-member, which springblades have at their forward ends chisel-ed ge cutting surfaces, a cap slidably mounted on the body part of the holder and provided with a conical outer end, a shoulder on said guidemember, a stop on the interior of said cap, and a spring interposed between said shoulder and said stop,`all arranged for operation substantially as hereinbefore described.

7. A pencil or like holder ,according to claim 6, wherein the conical outer end of said cap is provided with slots to accommodate the sharpening members, and wherein means are provided for preventing rotational movement of said cap in relation to the pencil holder.

8. In a pencil or like holder of the type referred to, the combination of sharpening members in the form of chisel-edge cutters arranged about the lead near the forward end of the holder, a lead-carrier which is slidably arranged in the holder and controlled by a spring so as to permit of the lead being moved inwardly between the sharpening members against the action of said spring by the application of pressure to the point of the lead and being moved outwardly between said members by the spring when the pressure is released, and means for producing a rotary movement of the lead-carrier so as to produce a round point on the lead.

9. A pencil or like holder of the type referred to, comprising in combination sharpening members in the form of chisel-edge cutters arranged about the lead near the forward end of the holder, a lead-carrier reciprocatably mounted in said holder, a spring urging said lead-carrier forwardly and so arranged that the lead can be moved inwardly between the sharpening members against the action of the spring by the application of pressure to the point of the lead and will be moved outwardly between said members by the spring when the pressure is released, a cam groove on the lead-carrier, and a pin fixed to the inner wall of said holder and projecting into said cam groove for producing a rotary movement of the lead-carrier, which Icam groove is se shaped that at the end et each complete stroke of the lead carrier a given angular movement is imparted to the lead and always in the same direction so that the lead is rotated between successive axial movements.

10. In a pencil or like holder of the type referred to, the combination of sharpening members in the form of chisel-edge cutters arranged about the lead near the forward end of the holder, a lead-carrier slidably arranged in the holder and controlled by a spring in such manner as to permit of the lead being moved inwardly between the sharpening members by the application of pressure to the point of the lead and being moved outwardly between said members by said spring when the pressure is released, which lead-carrier is formed in two parts whereof one part is a sleeve loosely mounted between two collars on the other part, a cam groove on the outer surface of said sleeve co-operating with a fixed pin to rotate said sleeve when it is reciprocated, and a clutch tooth on one of said collars adapted to engage clutch teeth on the adjacent end of said other part of the leadcarrier, all so constructed and arranged that the lead will be rotated only during its axial movement in one direction. Y

1l. In a pencil or like holder of the type referred to, the combination of sharpening members in the form of chisel-edge cutters arranged about the lead near the forward end of the holder, a lead-carrier slidably arranged in the holder and controlled by a spring in such manner as to permit of the lead being moved inwardly between the sharpening members against the action of said spring by the application of pressure to the point of the lead and being moved outwardly between said members by the spring when the pressure is released, and means for pressing said sharpening members inwards suiiciently to grip the lead locking it in its operative position.

12. In a pencil or like holder of the type referred to, the combination of sharpening members in the form of chisel-edge cutters arranged about the lead near the forward end of the holder, a spring-controlled lead-carrier slidably arranged in the holder and controlled by a spring in such manner as to permit of the lead being moved inwardly between the sharpening members against the action of said spring by the application of pressure to the point of the lead and being moved outwardly between said members by the spring when the pressure is released, and a cap adapted to be moved longitudinally over the sharpening members and having a part which during such longitudinal movclnent presses the sharpening members inwardly on to the lead suiiiciently to grip the latter and lock it in its operative position.

13. In a pencil or like holder of the type referred to, the combination of sharpening members in the form of chisel-edge cutters arranged about the leed Dear the forward @ed lli) of the holder, a lead-earrier slidably arranged in the holder and controlled by a spring in such mannery as to permit of the lead being moved inwardly between the sharpening members against the action of said spring by the application of pressure to the point of the lead and being moved outwardly between said members by the spring when the pressure is released, a spring-controlled cap that is slidably and rotatably mounted on the body part of the holder, which cap has a conical end portion arranged to press the sharpening members inwardly against the lead during the rearward sliding movements of said cap, and means to determine various positions of said cap, for the purpose specified.

la. In a pencil or like holder of the type referred to, the combination of sharpening members in the form of chisel-edge cutters arranged about the lead near the forward end of the holder, a springcontrolled leadcarrier slidably arranged in the holder and controlled by a spring in such manner as to permit of trie lead being moved inwardly between the sharpening members against the action of said spring by the application of pressure to the point of the lead and bein moved outwardly between said members Ey the spring when the pressure is released, a springecontrolled cap that is slidably and rotatably mounted on the body part of the holder, which cap has a conical end portion arranged to press the sharpening members inwardly against the lead during therearward sliding movements of said cap, a pin co-acting with a slot in said cap to determine various positions of the cap7 which slot comprises a main longitudinal portion, a transverse portion, and a second transverse portion connecting with a second longitudinal portion which eX- tends from said second transverse portion to izhe rear end of the cap, for the purpose speci- In testimony whereof I aiiix my signature.

GEORGE SKEFFINGTGN MILNE GRIMMER.

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