US1821994A

US1821994A - Pencil

Info

Publication number: US1821994A
Application number: US463420A
Authority: US
Inventors: Horace B Van Dorn
Original assignee: Joseph Dixon Crucible Co
Current assignee: Joseph Dixon Crucible Co
Priority date: 1930-06-24
Filing date: 1930-06-24
Publication date: 1931-09-08
Anticipated expiration: 1948-09-08

Description

p 3, 1931- H. B. VAN DORN- 1,821,994

' PENCIL Filed June 2 4, 1950 INVENTOR ATTORN EY BHorace :3. YanDm-n Y Patented Sept. 8, 1931 UNITED STATES PATENT OFFICE HORACE C RUCIBLE COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF N121? JERSEY The pr provemen 111 eraser B. VAN DORN, OF MAPLEWOOD, NEW JERSEY, ASSIGNOR TO JOSEPH DIXON Application filed June 24,

l esent lnventlon relates to an 1111- t in P8110118 and more particularly holdmg attachments for lead pencils sheathed in Wood or equivalent materlal.

The general object of the invention is to provide a device of thischaracter which will be more sightly in appearance, cheaper to manufacture and more readily attachable to pencils than those heretofore proposed or in use.

vention resides in the A more specific object of the inprovision of a superior eraser attachment or holder molded from a synthetic resin or phenolic conden-- satlon product.

Other objects and advantages of the vention will a ppear from the following dealled description of one preferred form elevation tached thereto thereof, reference being had to the accompanying drawmgs wherem: Flg. 1 1s a side of a pencil having an eraser at- 'by means in accordance with the present invention. Fig. 2 is a detailed of Fig. 1

' view partly insection of the upper-portion F ig. 3 is a plan View looking down from above in Fig. 2. Fig. 4- is a see- I tion taken on ing in the direction of v There is shown at 1 a pencil sheath of .Wood or lead 2.

and is provided with a the line H of Fig. 2 lookthe arrows.

similar material surrounding a This sheath is ofhexagonal form portion 3 at one end hich is reduced in size and is like.- enerally hexagonal shape, for .the hereinafter indicated. The at- 4 for holding the eraser. on the composed of a synthetic resin or henolic material, such as bakelite,

o and comprises a tubular portion 5 for engagement tubular portion 6 with the pencil and an enlarged for holding the eraser.

The tubular portion 5 is interiorly threaded at'7, the threads the come the penci being adapted to engage rs 8 of the reduced portion 3 of l, forming depressions. 9 in these corners as the attachment is screwed on to the pencil.

material The threads 7 are made of the of which the attachment is eorn-.

g fposed and form an integral part thereof.

Any nece ssity for the provision ofcooper- PENCIL 1930. Serial No. 463,420.

pencil is avoided, save the" attachment form when it is initially at- The attachment may. pencil or removed at ating threads'on the as the threads in grooves in the pencil tachedto the latter. thus be placed on the. will. provided a transverse partition 10. The reduction of the cross-section on the end of the pencil forms a shoulder 11 against which the end of tubular portion 5 seats or abuts, the height of this ortion being somewhat greater than the height of the reduced portion of the pencil to avoid abutment of the end of the pencil against the partition, and consequent possibility of an imperfect fit at the shoulder. Exteriorly, portion 5 is circular in cross-section and tapers slightly towards shoulder 11, The portion 6 has a circular interior and polygonal exterior, the latter so that it may 'be, gripped when the attachment is to be screwedon to the pencil. Within portion 6 the eraser 12 is seated, and may be cemented therein.

reference to the specific embodiment illustrated, I do not wish to be limited save by the scope of the appended claims.

I claim: I

1. In combination with a wooden sheath having an end portion reduced in size to form a shoulder spaced inwardly from the extremity of said end portion, a unitary attachment of synthetic resinous material comprising a reduced'tubular portion internally screw threaded with the bore formed by the edges of the thread of less diameter than the diameter of the reduced portion Where-by threads will be formed on the re duced portion of the sheath when the attachment is applied thereto, said attachment having a second, relatively enlarged, tubular portion to hold an eraser and a partition to separate said tubular portions spaced from Between portions 5- and 6, there is lVhile I have described my invention with the free, edge of the threaded portion a with the partition, the enlarged eraser receiving tubular portion being exteriorly provided with elongated flattened surfaces substantially co-extensive therewith. 5 2. In combination with a wooden sheath having an' end portion reduced in size to form a shoulder spaced inwardly from the extremity of said end portion, a unitary attachment comprising a tubular portion internally screw threaded with the bore formed by the edges of the thread of less diameter than the diameter of the reduced portion whereby threads will be formed on the reduced portion of the sheath when the 16 attachment is forcibly applied thereto, said attachment having a second relatively larger tubular portion to hold an eraser, the free edge of the threaded tubular portion engaging said shoulder of the sheath to stop move- 20 ment of the'attachment on the sheath.

HORACE B. VAN DORN.