US1353352A - Pencil - Google Patents

Description

F. 1. KRISTOFEK AND H. L. FISCHER.

PENCIL. PPLICATION FILED NOV. Il, i919.'

1,353,352. Patenasept.' 21, 1920.`

UNITED STATES :PATENT QFFICE,

FRANK J'. KRISTOFEK AND HOWARD L. FISCHER, OF ST. PAUL, MINNESOTA, ASSIGNORS TO BROWN @a BIGELOW, OF ST.` PAUL, MINNESOTA, A CORPORATION OF MINNESOTA.

PENCIL.

' To all whom it may concern:

county of Ramsey and State of Minnesota, l

have inventedl ya new and useful Improvement in Pencils, of which the following is a specification.l

Our-invention relates to a pencil, the operatingparts of which are held collectively removable from the pencil barrel or shell so that a new marking lead can be inserted in position for use when the old lead is worn too short. When the operating parts of our pencil are removed from the barrel by a simple operation, a' new marking lead can readily be-inserted in place for use while the pencil barrel, which is adapted to inclose the operating parts, is formed with an inner smooth contour so that in the construction of the pencil no mechanism is secured rigidly in place in the barrel but rather allows the barrel to be formed of thin tubing by swaging the forward end into the desired conical shape to simulate the writing end of a pencil while the rear end is swaged to receive a holding thread by Very\ simple operations. In the making ofa pencil it is important that it be of simple construction and of a practical nature so that lall the parts are` formed exactly the same ywith ordinary-dies, tools and swaging mechanism and without the necessity of each pencil being made by hand, especially where it is desired to manufacture the pencils for commercial purposes.

A feature of our invention is thatl by a suitable locking means the mechanisml is held for operation in the pencil barrel and the rotatable operating head will propel the lead out of the writing end of the barrel when turned toward the right while the operating mechanism lwill withdraw the lead when the head is turned to the left. A

' continued turning of the operating head to the left will unlock the operating mechanism from the encil barrel so that' it can be withdrawn. 'l'ihis'` feature is important in accomplishing a natural result.

Further ,our pencil proviiles means for conveniently holding extra marking leads so that when the mechanism is removed from the barrel a new marking lead can be readily engaged and inserted `in the operating mechanism. The lead holding means is so constructed that the free ends '.of the marking spr-,emanan of Letters Parent. Patented Sept, 21, 1920,

Application led November 11, l1919. Serial No. 337,160.

of the extra marking leads will be automativ cally distended from the main parts or body7 of the operating mechanism to allow easy engagement of the same while upon inserting the operatingjmechanism into th"J barrel the marking leads are drawn into close relation with the body of the operating mechanism to hold them in a collective position, freely insertib-le into thevpencil vbarrel or ready to be withdrawn with the operating mechanism. f

Our invention further provides sockets for the extra leads, which are so constructed as to freely receive the extra markingleads to hold them therein, together with-means for holding the extra marking leads .co1- lectively slidable on the operating mechanism to project the free ends of the extra leads beyond the forward end of the operating mechanism when itis desired.

1n the drawings forming part of this specification Figurel is a side view of our pencil, illus-- trating the barrel in longitudinal cross section. f

Fig. 2 is a view of the operating mechanism and extralead holding means, part of the mechanism being illustrated in cross section.- l

Fig. 3 illustrates .an alternative construction of lead holding means for our pencil.

Fig. 4 is a detail of a portion of the construction illustrated in ig. 4 p

Fig. 5 is'a detail of our pencil illustrating an alternative construction of lead holding means.

- Fig. 6 is a cross section of the pencil on the line 6-6 of Fig. 1. I 1

The drawings illustrate our pencil A, which is designed to hold a marking lead 10 of a long, 'thin construction havinga very small diameter. The barrel 1l of the pencil is formed ofl any suitable tubular material with a thin wall and theforward end 12 is swaged to a conical shape to simulate the writing end of an ordinary penc1l,

of the conical end 12 of approximately the The marking lead 10,-when it is in position for use,is held axially in the pencil and in the operating mechanism B, which has a socket 14, to engage the rear or butt end lead and Whh is secured v while an opening 13 .is'formedin the apexrigidly to the driving membery 15. The socket. 14 and member 15 are held freely slidable in the tubular member 16 with the engaging edge 17 of the driving member eX- tending through the longitudinally extending slot 18 formed in the member 16 so that the notches 19in the edge 17 will engage the thread 20 formed in the tubular member 21. j The tubular member 21lis positioned` to surround the member 16 and the rear end of the same'is rigidly secured to or formed integral with the threaded locking head 22. The rear end of the member 16 extends through the rear end of the tubular y against the inner side of the same and draw threaded member 21 and is engaged by the pin 23, which is formed integral with 'the head 24, the pin 23 being soldered or rigidly attached to the inner end of the member 16 to rigidly secure the operating head 24 to the member 16. By means of a suitable collar 25, which is rigidly secured by solder or other suitable means,`to the .forward end of the tubular member 16, the tubular threaded member 21 with its operating head 22 is secured against longitudinal movement but freely rotatable on the tubular operating member 16.

The member 16 is slightlyllarger in diameter than the marking leads 1() so that the same can freely move in the member 16 when the marking lead 10 is held in position for writing in the pencil barrel 11, and i to allow the marking lead to slide freely into the conical forward end 12 through the opening 13 without any side pressure which mightv tend to break the very thin lead. This is an important feature of the invention, as it allows the marking lead to alinel or adjust itself *with the hole 13 in the pencil barrel 11.

The operating mechanism B is inserted into the pencil barrel 11 with the threads 26 of the locking member 22 engaging the threads 27 inthe rear of the pencil barrel so that by screwing the member 22 tightly into the threads 27 the operating mechanism B will be locked in the pencil barrel 11 with the threaded member 21 held against rotation, while the operating head 24 is freely rotatable to rotate the member 16 and cause the driving member 15 to be propelled in either directionl in the same by engaging with the threads 20 to eject or withdraw the marking lead 10 from the writing end of the pencil A. The engaging end 17 of the driving member -15 is held movable in the slot 18 free to'follow the thread 20 so that the operation of the head 24 will move the member 15 along the thread 20.

lExtra markin sockets 2 8, whic are formed on the band 29, while the band 29 engages the outer surface of the member 21 either frictionally or is rigidly attached thereto in any suitable leads 10 are held in the sition in the pencil A'. Thesoekets 28 are connected to the band by the flexible Shanks the extra leads 10 into close proximity to the body of themember 21 to hold the free ends of the same against engagement with the threads 27 Aand allow the eXtra leads to pass freely in and out of the barrel 11.

The barrel or casing 11 of the pencil A forms the louter wall of the magazine compartment for the eXtra marking lead 10', while the threaded member 21 ofthe lead propelling unit B /frms the inner wall thereof. Thus the lead propelling mechanism coperates with the casing to form a magazine compartment about the mechanism B. When the lead propelling mechanism B is removed from the casing 11 the entire contents of the magazine compartment is withdrawn from the pencil. The outer ends of the sockets 28 are flared at 31 to form a larger opening in thel re-l ceiving end of the socket to allow the leads to be more easily inserted therein. This feature allows the extra leads to be easily inserted in the spring sockets 28.

The construction illustrated in Figs. 3 and 4 is of l an angular spring socket member 32, which is formed of thin spring material and is split at 33 longitudinally so as to engage the threaded member 21 frictionally and to be freely and slidably held thereon` The extra marking leads 10 are held by the spring member 32 in the corners or apexes 34 of the angular member 32. It is obvious that the spring socket member 32 can be triangular in general cross sectional shape with rounded apexes or of any other suitable angular shape to form recessesbetween the member 21 and the member 32 to receive the ends of eXtra marking leadsI 10,v while the spring construction vof the member 32 allows the free ends of the extra leads 10* to be engaged and raised away from the body of the member `21 to withdraw the same from the springsocket member 32V without disturbing the rest of the marking leads held thereby and without breaking the marking lead engaged. lThis confreely slidalble thereon, while the s ring sockets 28 are held by the spring shan s 30 in close proximity or parallel to the body of the member 2l to hold the marking leads closely thereto. In this construction the v member 29 is freely slidable on the member 21 so thatthe free ends of the marking leads can be projected beyond the forward'end of the operating mechanism to withdraw any of the same from the sockets 28 without interfering with the other mechanism.

The simple inexpensive construction of l our pencil with its free operating parts tends tol give a complete device cfa very practical nature and it will be readily seen that the construction of the same allows the operati. ing parts of one pencil to be freely interchangeable with the operating parts, as a whole, with another pencil of the same construction. This will allow the use of the same barrel 11 for. holding a, different or new operating mechanism B sov that when a man purchases this pencil, if the operating mechanism B becomes inoperable or is defective he can readily secure a new one withf out inconvenience to the dealer and by retaining his -own barrel orshell 11, which may have received some use. By 'this it will be noted .that the construction of our pencil will allow ythe interchanging of the operating mechanism with the barrels, aL

feature which is most desirable in a practical pencil. if

In accordance with the patent statues we have .described the principles of operation of our invention, together with the appa-I ratus which'we now consider to represent the best embodiment thereof, but we desire to have it understood that the construction shown is only illustrative and that the inl vention can be carried out by otherrmeans and applied to uses other than those above set forth within the scope of the following claims.

We claim l. A pencil including c a tubular barrel,

v means for propelling a marking lead in threaded member to propel a lead either direction, comprising, a threaded tu'- bular member, a locking head' rigidly at-V tached to the rear of said threaded member, a lead receiving tubular member, a lead driving elementI having a lead receiving socketsl/idably held within said lead receiving member, said driving member being adapted to engage the threads on sai held in said socket, an operating head fixed to the rear end of said lead'receiving member adjacent said locking head and a collar at'the forward end of said lead receivifng'inember adapted to retain said threaded member'on said lead receiving member against longitudinal movement and to support the forward end of thesamein sald barrel.

2. A pencil including a hollow barrel, a

hollow conical forward end on said barrel, a lead propelling means ladapted to be 4collectively removably held in said barrel, comprising, a hollow threaded member, a locking collar fixed to the rear end of said member, a longitudinally slotted hollow member extending through said threaded mem cluding, a tubular longitudinally slotted member, a leaddriving member in said slotted member, an'operating head formed on the rear end of said, slotted member, a tubular threaded member through Iwhich said slotted member is adapted to extend, a

locking head formed on said threaded member adjacent said operating head and a collar connected to andadapted to support the forward ends. of said slotted and threaded membersin said barrel.

4. A pencil including means for propelling a marking lead in either direction, a hollowv barrel having a rear opening to receive said propelling means. sald propelling y means including two exposed operatin heads adjacent each other, one rigidly fixe to said propelling means and adapted to lock it in said barrelv and the other adapted to operate said propelling means.

5. A pencil comprising the combination of a .tubular barrel, a threadedopen rear lend formed on said barrel, a threaded tubular member adapted to be contained in said barrel, a locking collar on the rear end of said threaded tubular member adapted to engage said threaded open end of said barrel, a long Iber extendlng through said threaded tubular member, an operating-head 'secured to the rear end of said slotted member, alead driving member in said slotted ymember and a supporting collar connected to and adapted to support the forward ends of said slotted and threaded members respectively in said barrel.

6. A pencil having a barrel, a leadpropelling means, 'a locking head rigidly con nected to said propelling means and an operating head adjacent said locking head, saidlocking and operating heads being itudinally slotted tubular mem-l adapted to be engaged and rotated together Ito remove or insert said propelling meansl in said barrel.

-7.. A pencil pelling means, a locking collar rigidly secured t0 said propelling means and an operhaivinga barrel, a lead pro-i ating'head for said propelling means adja- 'cent said collar, said head and collar both being 'engaged and rotated together with said propelling means to remove said pro` pelling means from said barrel.

8. A pencil including a barrel, a lead propelling means and resilient means ada ted to4 automatically distend an extra `mar ing lead fromsaid propelling means when said propelling means is\ removed from said barrel. y

9. A pencil comprising in combinationa barrel, a lead propelling means and means adapted to hold one end of a Series of extra marking leads to said propelling means,

whereby the free ends of the extra marking leads will be distended away from said ropelling'means when' removed from said arrel and be drawn collectively together adjacent said propelling means wlien inserted in said barrel.

10. A pencil including means adapted to hold a series of eXtra marking leads to automatically distend and collect' the leads when said pencil is opened and closed respectively.

11. A pencil having a barrel, a leadpropelling means and means adapted to hold -one end of a series of extra marking leads collectively to said propelling means with the free ends ofthe extra leads extending toward the rear end of -said ropelling means to cause the collectively he d ends of the leads to enter said barrel first when said propelling means is inserted in said barrel.

12. A pencil including a barrel, a lead propelling means and means ada. ted to hold a series of extra marking lea s automatically distended or collectively drawn together about said propelling means when said propelling means is removed or inserted respectively -in said barrel.

13. A pencil, comprising a barrel, a lead propelling means within the barrel and spaced 4therefrom to form a lead receiving magazine between the lead propelling means and the barrel anda closure on said lead propelling means for said magazine removably secured to said barrel to lremove said propelling means in yits operative entirety and open said magazine.

14. A pencil havingv within its body a i' lead propelling mechanism extending to the exterior of the pencil body, there being l-a space surrounding. said mechanism within the body open at its upper end and forming a circular magazine for reserve leads, the propelling mechanism extending to the exterior of the pencil body at its upper end, means integral with said propelling mechanism adapted to form aI closure for the magazine detachably secured to the pencil -body whereby leads within the magazine Ymay be extracted, and means extending beyond the closure means for actuating the lead propelling mechanism.

15. A pencil having within itsbody a.

lead ropelling mechanism extending to the exter1or`of the pencil body, there being a space surrounding said mechanism within the body open at one end and forming a magazine for reserve leads, means integral with said propelling mechanism detachably secured to the pencil-body for forming a closure Y for the magazine whereby. leads within the magazine may be extracted'and.

tending exterior ofthe' casing for detachably securing the lead propelling means in its entirety to the casing and forming a closure for said magazine and means for actuating`the lead propelling mechanism extending to the exterior of th'e pencil body 'at its upper end, said propelling mechanism being detachably secured to the pencil body whereby. leads may be removed from the magazine. y

17. A pencil comprising a casing having an open end, a removable unit comprising means for gradually feeding the lead through the open end of the casing as the lead is worn away atv the writing point, said unit being positioned vin a manner to-a provide a lead receiving compartment about the unit within the casing, said casing forming the outer wall of the compartment,

whereby the contents of the compartment 1s withdrawn from the casing when the unit is removed therefrom.

FRANK J. KRISTOFEK. HOWARD L. FISCHER.

Images