US1578515A - Propelling pencil - Google Patents

Description

T. HAYAKAWA PROPELLING PENCIL Filed July 11, 1923 Patented 3t), 1925.

@ time UNITED s 'rATss FATENT OFFICE.

I, TOKUJI HAYAKAWA, or rr'o'xvo, JAPAN;

PROPELTLING PENCIL.

a To all whom it may concern:

Beit known that: I TonUJi Hurnnmva' 7 7 a subject of the Emperor of Japan, and a and a lead carrier held in said guide tube, so

that the lead carrier. can be propelled by rotating the guide tube. p v An object of the invention is to provide improved connecting means betweenthe inner tube and the guide tube, whereby the use of solderis eliminated and. by means of which the assembling and disassembling of the parts for repairsis greatly facilitated, said connecting means serving also to secure the inner tube within the casing. In the accompanying drawing Figure 1 is a perspective view of the pencil with outer casing in section to disclose the interior thereof.

Figure '2 is a longitudinal section through the assembled pencil.

Figure 3 is a perspective view of the inner tube.

Figure 4 is a perspective View of the clip for connecting the members together.

Figs. 5 and 6 are transverse sectional views taken respectively on the lines V-ZV and vVIVI of Fig. 2; and.

Fig. 7 is a sideelevation of the guide tube detached. V t L In propelling pencils of this kind, the lead carrier is frequently broken andis generally soldered to the inner tube so that both the lead carrier and the inner tube must necessarily be replaced. This invention is designed to eliminate 1 this defect by providing a construction whereln it is necessary to replace only the damaged parts.

It is also a special feature of the invention that the clip serves not only to connect the inner tube with the pencil casing, but also to connect the guide tube carrying detachably the pencil carrier with said inner tube, so that several'members of the pencil,

which heretofore have been soldered togetho a e m e letachablewhereby repa rs and Application filedluly 11, 1923. Serial No..650,740.

inspection can be made with facility, said parts being properly held in their posit-ions. Referring now particularly to the draw ing, 1 designates a pencil casing or barrel which is provided with-aconical writing end as usual and is adapted to: enclose an i inner tube. 2.

The inner .tube .2 -isconstructed so as to haveflthree portions having different diam- V eters respectively as shownm Figs. 2 and The upper portion of thetube 2 is adapted to receive a tube 4: which is attached to an operating head 3, and which tube is in turn adapted to receive the end of a tubular member l i formlng a magazine for the storage of spare leads. The intermediate portion of the tube 2 is provided with a slot 9 and is adapted toreceive a guide-tube 5, while the lower portion is adapted to receive alead carrier 8 and allow the same to be propelled.

*Theguide tube 5 v may consist of a tube provided with a spiral groove or may bejv formed. of'a tubular coil of spirally wound ed'thin metal strip,, so as to provideaspiral guideway. Toltherear or upper end of the guide tube b,is attachedby swaging, a connector 7, .which is provided with an annular groove 11, approximately in the plane of juncturewith the guide tube, which connector is attached by swagingto one end of the magazine tube 14; for the spare leads.

The magazine tube 14 thus attached to the guide tube 5, is adapted to be frictionally engaged by the tube a so that said guide tube can be rotated with the operatinghead. The magazine tube 1% can be formed in} tegral with the guide tube 5, if desired. The guide tube 5 carries thejlead' carrier i 8 which has a hook formed integral with its.

u oer or rear end said hook bein ada ted to project through the spiral guideway in the guide tube 5 and into the slot Set the tube'2. This construction allows the lead carrier 8 to be propelled in accordancewith the rotation of the guide tube 5."

The inner 'tube 2 is provided 'withtwo perforationsor notches 10- at diametrically opposite sides of the upper part of the inter-v mediate portion and is connected with the guide tube 5 by the engagementof two legs 13 of a clip .12 with the notches 10 and the ani'iular groove 11 of the member 7, said groove and notches being brought into alinenient when said guide tube is inserted into "he inner tube. V

The clip 12 is made of me a-1 i e iflli is firstfOrmed into U shape and the ends of v the two legs then bent over at right angle so j what I claim is that they can be inserted into the annular groove 11 on theconnector through the notches 1 0 in the inner tube 2, the U-sha'ped portion being adapted friction-ally to engage the walls of the inner tube and casing, as clearly shown in'Fig. 6, thereby to prevent rotationof the tube relative to the casing.

Thus the present invention provides a propelling pencil, the lead of which can be propelled by rotation of the operating head. Having thus described my invention,

1. 'A device otthe character described, comprising, in combination, an outer casing, anfinnertube within said casing, a guide tube withinsaid inner tube, and a removable :clip friction-ally engaging said tubes and casing thereby to hold the inner tube against rotation in the casing and to lock the guide tube against longitudinal movement while permitting rotation thereof relative to said inner tube.

2. A device of the character described, comprising, in combination, an outer casing, an inner tube within said casing and having a pair of diametrically opposite notches in its wall, a guide tube within said inner tube and provided with an annular; groove disposed in diametrical" alinement with said notches, and a removable clipdisposed between and adapted frictionally toengage the walls of said inner tube and easing thereby to prevent rotation of the tube relative to the casing, said clip having a pair of'legs projecting through said notches into engagement with said annular groove thereby to lock the guide tube against longitudinal movement wh le permitting rotation thereof relative tothe 1111161 tube.

body thereof and projecting A [device of the cha 'acter described, comprising, in combination, an outer casing, an inner tube within said casing and having a pair of diametrically opposite notches in its wall,a guide tube within said inner tube andprovided with an annular groove dis-- posed in diametrical 'alineinent with said notches, and a removable U shapedclip disposed between and adapted frictionally to engage the walls of said inner tube and ca ing thereby to prevent rotation of the tube relative to the casing, said clip havinga pair of legs extending at right angles to: the through said notches into engagement with saidannular groove thereby: to lock the guide tube against longitudinal movement while permitting rotation thereof relative to the inner tube.

4. A, device oi the character described, comprisingy incernbination, an outer casing, an inner tube within said casing, said inner tube comprising portions'ot different diameters, one of said portions having a longitudinal extending slot in its wall, a guide tube; or spiral formation disposed within said portion and adapted for rotation relative to said inner tube, the coils of the spiral being spaced: apart to provide a guideWay, a movable lead carrier normally disposed: in

the portion of the inner tubeof'smallest diameter and provided with a guide member extending through said guideway and into said slot, means for rotating the guide tube, and removable means for retaining the inner tube again st rotation relative to the casing and for holding the guide tube against lon giti'id'i'nal movement while permitting rotation thereof relative to the inner tube.-

name to this specification.

7 TOKUJI HAYAKAWA.

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