US1187018A - Pencil. - Google Patents

Description

L. H. SONDHEIM.

PENCIL.

APPLICATION FILED NOV. I. 1915.

1,187,018. Patented June 13, 1916.

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I71 verztar UNITED "STATES PATENT orFIc LEWIS H'. soivnnnm, or NEwYon'K, N. Y.

PENCIL.

7 To all whom it may concern:

Be'it known that'I, LEWIS H: SonDHnI'M, a citizen of the United States, residing in the city of New York, countyand State of her 2nd, 1915, the present improvement consisting of the construction ofthe pusher and.

the parts attached tosame; a variation from said former construction being shown also in the position and shape of the recesses in the actuating tube.

Reference is to be had: to the accompanying drawings forming a part of this specification, inwhich similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side view of a pencil embodymglmy invention, the parts visiblebeing in t e normal position showing the pencil ready for use. Fig. 2is a sectional elevation showing the interior parts in the same normal position as in Fig. 1; Fig.3 is a sectional elevation of .a broken away part of the" pencil giving a view from a point at approximately a right angle to that of Fig. 2, and showing the groove in the bore and the extensionof the pusher which enters and'movesin' same. Fig. 4:- is a sectional elevation of a portion of the pencil from the view point of Fig. 2 'butshow ing the position of? the pawl inthetube after the latter has been rotated to allow 1 45' the lead and thepuslier to be forced .rearpencil taken on the line 5'5' in Fig. 2 and wardly. Fig. 5 is across section of the showing the pawl-end resting in one of the recesses of the'actuating tube. similar cross sec tion,-butshowing the tube rotated from its position in'Fig. 5' and the end of the pawl freed from the teeth of saidtube. Fig. 7 is a perspective .-vi ew of-the body portion of the pusher and the pawl,

the end of the latter being shown slightlyv bent to one side. Fig. is a perspective view of an attachment to the pusher, con- Fig. 6 is a Specification of Letters ratent. Patented Ju ne' 13, 19 16,. Application flleu r1 cvember 1, 1915. Serial No. 59,096.

slsting of a circularly. bent plate of 'metal, which serves to impart to said pusher a frictional hold upon the walls of the bore in the casing, and which-for brevity-I will herein call a circularly formed attachment. Fig. 9 is a perspective view of a -modified form of the circularly formed at- 'shown more. or less enlarged.

The casin orshell A is preferably made of wood tape ed at the forward end and has an enlarged bore-B. to receive the lead L i and its holding and adjusting mechanism presently described. ,At the tapered end of the casethe bore B is so narrow as to be capable of exerting a slight friction upon the lead sufficient to.v prevent it fro dropping out of the casing. Opposite t e point where the tapered end emerges into the cylindrical part of the case, the bore widens and from this point there is a longitudinal groove 0 which communicates with the bore I B andextendsto the rear of the casing."

In the bore B is placed an actuating tube V D, havinga wide longitudinal slot 1 and a series of teeth 2, forming pawl-engaging. I

recesses 3, along one edge of said slot; Said.

tube extends beyond the rear end of the easing A and is there firmly attachedto a rota-. table and longitudinally reciprocating push cap E, moving upon a ferrule F- which is attached to ,the casing A, the forward end ofthe cap being slightly bent' inward at 4, and the rear end of the ferrulebeing slightly bent outwardat 5 so as to limit the rearward movement ofthe cap, said cap being a sim-- ple means of moving the tube D in longitu-f dinally. reciprocating vdirection' as well as" me November 2nd, 191

. The lead 1. fits the tube .D' so than while is. prevented from shaking therein, it will not frictionally bind a. Within the actuating tube D is loosely fitted a pusher G consisting of a body portion 6, which lies within said tube, the outwardly extending part 7 which passes through the slot of said tube, the pawl 8 and the pawl-head 9, and which is preferably formed from a piece of flat spring-metal, the pawl-head 9 being bent slightly to one side to form a detent to enage the recesses at the edge of the tube D. urrounding the tube D is a short piece of spring metal S of circularly bent form which distends outwardly so as to'frictionally fit the walls of the bore B when compressed into said bore, but which allows the tube D to move within it without material friction, and to which is firmly attached the extending part 7 of the pusher in such manner that said part projects beyond the outer surface of said circularly formed attachment S through its recess 10 and into the groove C of the casing A, in which it fits so loosely that said groove exerts no resistance upon its movement longitudinally, but prevents it from rotary movement. *I have shown a modified form of the attachment S in Fig. 9, consisting of a completely closed cylinder T having the slot 11,-wh1ich may perform the same function asthe attachment S, provided it be so closely adjusted to the bore B as to have the necessary fric rotated so as to bring said recesses 1n line with the pawl-end and cause the latter to rest in one of them or enter same upon any slight pressure upon the lead point. e

If it is desired to advance the lead, the

cap E with the tube D is moved forward and then drawn back.'. In its forward movement the forcible pressure exerted will overcome the friction-hold of the circularly formed part S of the pusher upon the'walls'of the bore B, and-the pusher and the lead, which abuts the forward end of said pusher will be advanced. In its rearward movement the.

pawl-end willride over the teeth of the tube, the frictionalfhold-of the part S upon the walls of the bore B preventin g the pusher To move'th e lead rearward, with the tube is rotated in such direction as to causethe toothed edge of the latter to move away from the pawl-head 9: and until the opposite smooth edgeof the tube abuts the side of the pu'sher-body 6, whereupon ,with the tub the push cap the projecting part of the lead has been .1

pushed-into the casing.

In the modification shown in Fig. 11 the groove 0 and such part of the extension 7 of the pusher G, as projects beyond the outer surface of the attachment S, which are 7 shown in Figs. 5 and 6, are dispensed with and the frictional contact of the said attachment S with the walls of the bore B whether said frictional contact be caused by the distending action ofthe attachment ita self, or by the pressure upon said attachment exerted by the body of the pusher-is relied upon to resist rotarymovement of the pusher to such extent, that when the cap E e D is rotated to move the toothed edge of the latter toward the pawl head 9 said resistance will cause said head 9 to contact with said toothed edge and enter one of the recesses 3, while upon the reversed rotation of cap and tube it would cause the pawl head 9to be freed from the toothed edge, the rotation of the cap and tube, which in the construction shown is not limited, being continued in either case until the respective edge ofthe tube contacts with thepawl head 9 or the pusher body 6.

I do not limit myself to the details of construction which I have shown, as certain parts may be slightly changed without departing from the spirit of my invention. For instance, I do not limit myself to the use of a spring-pawl in the pusher, but consider the use of any means to bring a longitudinally reciprocating and rotatably movable actuating tube into engagement and again out of engagement with a pusher as within my lnvention, provided the same be 1 used in connection with an attachment to the pusher on the outside of the tube having greater or lesser extent laterally and formed cylindrically shaped inner walls of the bore B, and which restrains the pusher from being moved undesirably, overcoming the incidental and minor fr1ction of the pusher with the actuating tube by -reason of the greater potential friction of said attachment with a portion of the walls of said bore B. Having described my invention, I claim: 1. In a pencil, the combination of an outer shell having a central bore, a longitudinally reciprocating and rotatably movable lead. containing tube in said bore, provided with a longitudinal slot, a lead in said tube, 7 sufficient width to allow the tube to have a turning movement relatively to the pusher, the tube and the pusher being respectively provided with means wherewith to engage each other, the rotary movement of the tube 1 11 to adaptitself with frictional contact to the, v

propelling pusher. the slot of the tube being of 15 serving to bring said tube into and again out of engagement with the pusher, and the forward movement of said tube servingto move the pusher forward'when in engagement with same, the pusher having an extension which passes the exterior surface of the tube through the slot of the latter, said extension having aflixed thereto on the outside of the tube a circularly formed attachment which bears with potential frictional contact upon the wall of the bore in the casing to restrain the pusher from being carried rearward by frictional contact of any of its-parts with the tube during the 15 rearward movement of said tube.

' 2. In a pencil, the combination of an outer shell having a central bore, a longitudinally reciprocating and rotatably movable lead containing tube in said bore, provided with a longitudinal slot and a longitudinally ranged series of recesses forming pawlengaging surface shoulders, a pusher within said tube provided with a spring-pawl to engage said pawl-engaging shoulders when the pawl-end is in line with them, the pusher having; an extension which passes the exterior surface of the tube through the slot of the latter, said extension having aflixed thereto on the outside of the tube, a circularly formed attachment which bears with potential frictional contact upon the wall of the bore in the casing to restrain the pusher from being carried rearward by frictional contact of either of its parts with the tube during the rearward movement of said tube, the slot of the tube being of suflicient width to allow the tube to have a turning movement relatively to the pusher to bring the end of the pawl out of engagement and again into engagement with the surface 4 shoulders ofsaid tube.

New York, October 28, 1915.

LEWIS H. SONDHEIM.

Witnesses:

0.. H. HARNEY, FRANCIS FREUDENvoLL,'J r.

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