US2119410A

US2119410A - Refillable pencil

Info

Publication number: US2119410A
Application number: US101150A
Authority: US
Inventors: Horace J Alter
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-09-16
Filing date: 1936-09-16
Publication date: 1938-05-31
Anticipated expiration: 1955-05-31

Description

May 31, 1938. H1 JQALTER REFILLABLE PENCIL Filed Sept. 16,' 1936 Patented May 31, 1938 UNITEDv STATES PATENT OFFICE mirrLLAisLr:` PENCIL Horace J. Alter, Brooklyn, N. vY. Application September 16, 1936, Serial No. 101,150

3 Claims. (C1. 1Z0- 21) This invention relates to refillable draftsmans or artists pencils and has for the primary object -vthe provision of avdevice of this character wherein the body thereof is approximately the Asame length as that of an ordinary pencil and has a portion preferably of hexagonal shape to permit the body to be readily grasped for use and is located adjacent the Writing end of the body while the remaining portion of the body tapers and is of cylindrical shape so that when the pencil is in use a low center of gravity will be 'had and adjacent the writing end, which so balances a pencil as to relieve holding strains.

Another object of the invention is the provision of a holding receptacle secured to the non-writing end of the body for removably attaching to said body a draftsmans prick point, either end of which may be easily brcught into position for use while the other end is fully protected.

A further object of this invention is the provision of an improved chuck carried by'the body wherein the lead will be engaged, and gripped over a larger portion thereof than heretofore lpossible in similarly constructed pencils to prevent highly localized stress on the lead.

With these and other objects in view, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and 30 claimed.

For a complete .understanding of my invention, reference is to be had to the following description and accompanying drawing, inwhich Figure 1 is a side elevation illustrating a re- 35 llable pencil constructed in accordance with my invention. l

' Figure 2 is a vertical sectional view illustrating the same.

Figure 3 is a fragmentary vertical sectional l0 view showing the prick point holder secured to the body with the point in operative position.

Figure 4 is a sectional view taken on the line 4--4 of Figure 2.

Figure 5 is a fragmentary vertical sectiona 45 View illustrating a modified form of my invention.

Referring in detail to the drawing, the numeral I indicates the body of the pencil having a bore 2 and is constructed from some suitable compo- 50 sition of material. The body I adjacent the writing end of the pencil is preferably of hexagonal shape, as shown at 3, to permit the body to be readily grasped and the body from the hexagonal shape towards the non-Writing end tapersy and i is of cylindrical shape and has its end recessed through. A retaining nut or sleeve I9 is threaded to receive a receptacle 4 of substantially tubular' shape having a flange 5 to abut the end of the body. The receptacle 4 is employed to receive a -draftsmans prick point 6 either end of which may be conned within the receptacle or holder 5 while the other end is exposed for use. While the receptacle 4 is shown and described as being fitted in thev recessed end of the body I it is to `be understood that the receptacle by increasing the size of the bore at one end may be tted over 10 the end of the body.

The hexagonal end 3 of the body besides providing an efficient grip for the body also provides a low center of gravity to the pencil in'entirety,

' that is, bringing the center of gravity closer to the 15 writing end of the pencil whereby the pencil may be more easily balanced when in use. The hexaganal-shaped end of the body is recessed and internally threaded to receive an exteriorly threaded stud or plug 8 which has threaded thereon a 20 retainer nut or sleeve 9. 'I'he sleeve or nut 9 has threaded therein a chuck IIl including an outer tapered portion II threaded to the nut or sleeve 9 andcontacting a reduced extension I2 formed on the stud or plug 9. Operating within the outer tapered portion II are elongated jaws I3 preferably three in number which engage with a lead I4 for a substantialv distance, the lead extending into the bore 2 by way of a bore I5 formed in the stud 8. The jaws tapertowards their free ends to correspond with the taper of the outer tapered portion I I of the chuck so that saidjaws will evenly contact with the lead substantially throughout their entire length. This construction of chuck provides maximum contact of the chuck with the lead and eliminates highly localized'stress on the lead, consequently reducing the chances of breaking the lead to a minimum still efficiently securing the lead against slippage. 40

Colored bands I6 may be applied` to the body to denote different grades of lead, permitting a person at a glance to determine what grade of lead is in -the pencil regardless of the position of the pencil.

Referring to the modified form of invention the hexagonal end 3 of the body I has formed thereon a reduced extension I1 tapered, as shown at I8, and has the bore I5 extending there- 0 on the extension and has an inner annular shoulder 20. A chuck 2l is threaded into the nut or sleeve I9 and includes the tapered jaws 22, the inner ends of which are shouldered, as shown at 23, to ride on the shoulder 20 and helocated 55 adjacent the end of the reduced extension l1. The outer ends of the jaws are internally knurled, as shown at 24. The chuck 2| includes the outer tapered sleeve-like portion 25 for effecting operation of the jaws into gripping the lead.

Having described the invention, I claim:

1. A rellable pencil comprising a body having a bore, a stud having a bore carried by said body, said bores adapted to receive a lead, a retaining nut threaded on said stud, a chuck sleeve threaded into said nut, elongated tapered jaws arranged in the sleeve to grip the lead.

2. A rellable pencil comprising a body having a bore, a stud having a bore threaded to said body, said bores adapted to receive a lead, a retaining nut threaded on said stud, a chuck sleeve threaded into said nut, elongated tapered jaws arranged in the sleeve to grip the lead, an extension formed on the stud to abut the jaws, and a shoulder formed in the chuck sleeve and engaging the extension.

3. A rellable pencil comprising a body having a bore and provided with a reduced screw threaded end with the bore extending therethrough to receive a lead, a retaining nut threaded on the extension, and an internal shoulder formed in the nut, a chuck sleeve threaded in the nut, elongated tapering jaws arranged in the sleeve to engage with the lead and having shouldered ends engaging with said rst shoulder.

HORACE J. ALTER.