US1540920A

US1540920A - Self-filling pencil

Info

Publication number: US1540920A
Application number: US718603A
Authority: US
Inventors: Berryman Hannibal
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-06-07
Filing date: 1924-06-07
Publication date: 1925-06-09
Anticipated expiration: 1942-06-09

Description

`une 9, 1925.

H. BERRYMAN SELF FILLING PENCIL Filed June m www. mm3 S..

mlmm

'amziaI/erlyman Patei'iteil June `9, 11925.

P.frENT OFFICE.

HANNIBAL BERRYMAN, OF CENTERYILLE, IMAZON'TANA.

Application led .Tune-7,

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that sort to'which the invention appertains.

lAlthough a preferred form has beenv Y shown, it will be understood that a mechanic, working within the scope of what is claimed, may make such changes as his skill may suggest, without departing from the spirit of the invention.

In the drawings Figurel shows in elevation; a pencil constructed in accordance with the invention, parts being broken away Vin this'andin the remaining views; Figure'v 2 is a longitudinal section, the plunger havfing' been retracted; Fi re 3 is a section showing the parts in writing position; Figure 4 'is a longitudinal section showing the parts in lead-ejecting position; Figure 5 is a cross section on the line 5-5 of Figure 2; Figure 6 is across section on the line 6-6 of Figure 2.

The pencilcomprises a body 1 which is a composite structure, the body including an intermediate tube 2 provided with a longitudinal opening or slot 3 communicatingwith a spiral slot 4 formed in the body 1 at the forward end thereof. A lferrule 5 receives the `:forward end of the tube 2 and is secured thereto, the ferrule having a longitudinal slot 6. A oint 7 is secured to 'the-ferrule 5, the ferru e projecting beyond the rear. end of the point 7. Thepoint 7 is provided with an external index 17. A

nut 8 is threaded on the rear end of the tube 2 and is provided with a longitudinal opening "I8, the nut 8 having a' reduced 5o neck 9.

A tubular shell 10 is journaled on the neck 9 of the-nut, 8 land onthe rear end of the ferrule 5, the shell beingprovided near its rear end with ,lateral )projections 11. At its forward end, the shell 10 has marksv 12 adapted to cooperate with the having an end wall 31 surrounding the col- 20 may be rotated by SELF-FILLING PENCIL.

1924..4 serial No. 718,603.

index 17 on' the point 7, -the shell having an external mark, such as an arrow 14, indicating that the shell maybe rotated. The shell 10 has internal longitudinal ribs 15 forming internal longitudinal lead. compartments 16, the lead in oneof the compartments being marked by the numeral 19. Within the tube 2 of the body 1 is located a hollow plunger 20 having a iiared mouth 21. The plunger 20 is'provided with a spiral slot 22, terminated short of the forward end of the plunger. The pitch of the slot -f 22 is quicker than the pitch of the slot 4 in the tube 2 of the body 1. Acollar. 23 sur- 70 rounds the rear end of the plunger 20 and is connected thereto by solder 24, or otherwise. At its inner end, the collar 23 has a flange 26. A cap 27 receives the rear end of the shelly 10 and the nut 8, the cap having an end wall 28 journalled' on the collar 23. A compression spring 29 surrounds the collar 23, one end of the spring abutting against the flange 26 of thecollar, and the other end of the spring abutting against the end wall 28 of the cap 27. vThe ca v27 has bayonet .slots 39, the mouths of w ich are denoted by the numeral 41, the inner en ds .of the y bayonet slots extending longitudinally of the cap, as shown at 40. The projections 11 on the shell 10 are adapted to cooperate with the bayonet -slots 39. The numeral 30 `desig- 1 nates a socket fixed to the collar 23 by the solder or other connection 24,' the socket lar 23 and engaged immediately by the solder or other connection 24. An eraser 32 is seated in the socket 31. A cover 33 for the eraser 32 is lprovided and is seated on the socket 30 with a strong frictional hold, so` that, as hereinafter explained, the plunger torsion applied to the cover 33.

A tubular lead holder 3.4 is mounted for reciprocation in thetubularplunger 20, the holder 34 being split as at 35,.t0'hold thel lead. The holder 34 has a lateral finger 36 extended through the 'spiral slot 22 of the plunger 20 and into the longitudinal slot 3 of the tube 2, the finger being adapted to 105 move into'the spiral slot 4 of 'the member 2. A combined. abutment and ejector 37 is located in the plunger 30 and extends into the holder 34. The abutment and 'ejector 37 has a transverse linger 38 extended through im. the spiral slot 22 of the plunger 20, through the longitudinal slot 3 of the tube 2 and into" one of the longitudinal compartments 16 of i the shell 10, to hold the shell against rotation, the-shell being provided at its rear end with a circumferential recess adapted to receive the finger 38, as shown in Figure 2,'

thereby setting the shell 10 free for rotation. The fingers 38 and 36 -of the abutment 37 and the holder 34, respectively, are spaced apart by one turn of the spiral slot 22 in the plunger 20, and throughout the major portion of the movement of the

parts

37 and 34, these parts travel inlined` relation to each i other, although, as hereinafter explained,

"10 are held in the parts 40 of the bayonet slots 39'of the cap 27 by the spring 29, the rear end of the lead is in the forward end of the lead holder 34 and in abutment with the member 37, and the forward end of the lead 50 protrudes from the pointA 7. Through theinstrumentality of the cover 33, the socket 3() and the connection 24, the plunger 20 may be.\rotated, and when the plunger is rotated, the lead 5() -will be fed forwardly, for use, through the medium of the holder 34 and the abutment 37, these parts moving forwardly because the finger 36 of the holder 34 is engaged with the spiral groove'22 ofathe plunger 20 and is rec eived slidably in the longitudinal opening 3 of the intermediate tube 2, the finger 38 of the abutment 37 being engaged with the spiralgroove 22-of the plunger 20, and being received slidably in the longitudinal opening 3 of the intermediate tube 2. The finger 38 is also received slidably in one of the internal longitudinal compartments 16 of the shell 10, to hold the shell against rotation for two purposes, oneof which is to enable the operator to holdtthe pencil by means of theshell whilst the operator is rotating j the plunger 20. The other reason for holding the shell against rotation has to do with l the delivery of the lead, and will be taken up hereinafter.` The foregoing description Acovers' the operation of advancing the lead as it is used away.

, The next operation to be considered is a final feeding of the lead, ending in an ejection of the stub. Noting Figure 4, it will be observed that, when the plunger 2O is rotated, the finger 38 ofthe ejector 37 at length moves into the longitudinal slot 6 of the ferrule 5in the point 7. By this time, the finger 36 of the lead holder 34 -will have arrived aththespiral slot 4 of the intermediate tube 2, 'and will traverse the slot 4 because the linger 36 is still engaged ,with the spiral slot22 of the tube 20, which is being rotated, the finger 36 ultimately arriving at`the end of the spiral slot 22 in the plunger 20. The pitch of the slot 22 in the plunger 20 is quicker than the pitch of the spiral slot 4 in the tube 2, and the result is that a differential movement between the ejector 37 and the holder 34 is produced, the ejector 37 advancing with respect to the holder 34, as shown in Figure 4. If, now, reverse rotation is imparted to the plunger 20, thefinger 36 of the `holder 34 will be carried back through the spiral groove 4 of the tube 2,

.into the longitudinal opening 3 of the vtube 'engage the projections 11 on the shell 10 from the parts 40 of the bayonet slots 39 in the cap, and the cap then is rotated, until the projections are aligned with the mouths 41 of the bayonet slots. Suppose, further, that the plunger 2O has been retracted until the finger 38 on the ejector 37 is in the recess 25 of the shell 10, asl shown in Figure 2. Since the finger 38 no longer is in one of the longitudinal compartments 16 of the shell, the shell can berotated in the direction of the arrow 14 until 'one of the marks 12 on the shell lines up. with the index 17. Under such circumstances, one of the compartments 16 of the shell is inline with the longitudinal opening 3 in the tube 2, and the lead dropsA from that compartment, through the opening 3, into the tube 2, as shown'at 42 in Figure 2, The plunger 20 then may-be advanced, the flared mouth 21 of the plunger picking up the lead and carrying it back into the plunger, in engagement with the holder' 34, the frictional drag of the point 7 on the lead serving to seat the lead in the holder 34. The cap 27 is assembled again with the shell 10, and the parts appear as shown in Figure 3. o

In order to fill the pencil, the shell 10 may be rotated when the parts are arranged as in Figure 2, the compartments 16 being brought, one after another, into registration with the opening 18 in the nut 8, and leads being inserted into the compartments, through the opening 18.

' What is claimed is 1. A lead pencil comprising a .body having a longitudinal opening, a plunger movable longitudinally' in the body and having a spiral slot, a shell journaled on the body and having a plurality of internal longitudinal lead compartments adapted tobe brought' one at a time into registration with the opening to permit a -lead to be discharged through the opening and into the body when the plunger is retracted, and a* lead feeding means movable-in the plunger and havinga finger engaged in the slot, the opening, and in one compartment, the body having a recess for the reception of the linger Y when the lead feeding means and the pluner are retracted, thereby to permit a rota t1on ofthe shell.

2. A' device of the class described, constructed as set forth in claim 1, and further characterized by the fact that the body has an vend opening through which leads may be introduced into the compartments of the shell, and a cap covering the opening and journaled on the plun er, the cap and the shell having detachabIy interengaged elements.

3. A lead pencilcoinprising a body havand provided in the body and having a spiral slot, a shell journaled on thebody and having a plural- .ity of internal longitudinal lead compartments adapted to be brought one at a time into registration with the opening topermit a lead to be discharged through the opening andl into the body when the plunger is retracted,a lead holder slidable in the plunger and provided with a linger;` received in the opening of the body and adapted to traverse the spiral slot of the body, and a lead ejector and abutment slidable in the holder and having a linger extended through the spiral slot of the plunger, through the longitudinal opening of the body and into one of the lead compartments of the shell, the body having a recess 'for the reception .of the finger of the ejector when the ejector and the plunger are retracted, the pitch of the spiral s1ot of the plunger bein greater than thepitch of the spiral slot of t e body.

In testimony that I claim the foregoing as my own, I .have hereto aiixed my signature in the presence of two Witnesses.

HANNIBAL BERRYMAN Witnesses: l

-PERGY VoGwILL,

JOSEPH WILLIAMS.