US290291A

US290291A - Pencil-holder

Info

Publication number: US290291A
Authority: US
Publication date: 1883-12-18
Anticipated expiration: 1900-12-18

Description

(No Model.)

BLTYRRBLL. PBNGILY'HQLDBR.'

, N0. 290,291. Patented D e. 18,1883.

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EDWARD TYRRELL, or CINCINNATI, oHIo.

PENCIL-HOLDER.

SPECIFICATION lforming part of Letters Patent No. 290,291, dated'December 18, 1883.

Application tiled September 5, 1883. (No model.)

T0 all whom t may concern.:

Be it known that I, EDWARD TYRRELI., a citizen of the United States, and a resident oi? Cincinnati, in the county of. Hamilton and" State of Ohio, have invented certain new and; useful Improvements in Pencil Holders, of which the following is a specification.

rlhe object of my invention is to provide a lead-pencil holder which can readily be adjusted to the use of different-sized leads, and which, at the same time, is cheap, durable, and convenient, all of which is accomplished as illustrated in the accompanying drawings.

Figure l is a central4 longitudinal section of my improvement, with the adjusting-nut shown in elevation. Fig. 2 is a similar view with the nut in section. Fig. 3 is a plan of the lead-tube and nut, and Fig. 4E is an enlarged broken section of the lead-tube. Fig. 5 is a longitudinal section oi the holder-point.

A represents the tube or barrel of the pencil-holder, which is preferably made of guttapercha. It is shown as made with a solid head. It may be provided with a movable cap.

B represents the removable holder-point, the bore of which is made to converge, so as to be of smaller diameter at the point and gradually increasing in size inwardly.

O represents the adjustable lead-tube. It is adj ustably connected to the holder by means of screw-threads at its rear, which engage with female threads cut in theadj usting-nutD, which nut seats in the bore of the holder.

c represents slots cut in the forward end of tube C.

In order to more efiectually hold the lead in the tube when the forks are clamped, I cut a screw-thread upon the interior of the point of the lead-tube C, as shown in Fig. 4. Owing to the elastic character of the metal and the necessity of having the elasticity preserved, these serrations must be made with a tap-tool which will cut the same in the interior of the cylinder without materially disturbing the metal. These threads may be cut before the tube is slotted, or afterward, by providing a suitable outside clamp or ferrule. Ihe s'lotting of the tube allows the lips or fingers at the forward point to be compressed to grasp and 'hold the lead. By adjusting tube C forward or backward in its adjusting-nut D, the end of the tube is set in any desired relation to the converging bore of point B to correspond with the size of lead to be employed, and when pointB is screwed on the holder the points of tube C are compressed and grasp the lead d and hold it fast for use. The tube C can be adjusted to the size of lead by removing the point B of the holder and turning the tube C to lengthen or shorten it, as desired. The lead is adjusted by simply loosening the point B, whenit is free to slip forward or backward the required distance, when point B is tightened and the lead is grasped, as before stated. rlhe nut D can be made to fit the bore of tube C and sufficiently tight to be held in place by friction alone, or it may be feathered, so as to avoid the necessity of removing the tube and nut for adjustment of the tube C; but I have the nut D made of two sections, e e', the large section being made of rubber and fitting the bore of the pierced holder and sectionc being lmade of hard rubber forming a joint-nut to prevent the tube C from turning. W'hen made in this manner, the tube C and adj usting-nut are removed from the holder for adjusting the tube to the size of lead.

In Fig. 3 the jointnut is shown as fitting the bore of the pencil-holder, while in Figs. l and 2 the j oint-nut is shown smaller. Thus the modes of construction are equivalent one to the other.

An obvious mode of adjusting tube Cwould be to 'have a removable head with tube C proj ecting through the nut to be turned from the rear when the cap is removed. Such a con# struction is embraced in the rst clause of claim herein.

I claimv 1. A lead-pencil composed of the holder A, point B, adjustable tube C, and nut D, all arranged and combined substantially as herein set forth.

2. In a lead-pencil, the combination of the holder A, with the extensible tube C and adjusting-nuts c e, substantially'as herein set forth.

3. In a lead-pencil, the combination, with theholder A, of an adjustable tube C, having Ioo extension-cap e, adapted to receive and firmly In testimony whereof I have hereunto set my Io hold different-sized leads Within Iche point l hand. having the converging bore at its point, Substantially as herein Set forth. EDVARD TYRRELL.

4. Inalead-penoil7 the combination of abarl rel, A, adjustable lead-tube C, provided with \Vitnesses: l Slots c, and having its interior forward end JNO. E. JONES, screw-threaded, and the sleeve B, all substan- A. 'GLUCHOWSKEL t'ially as and for the purpose herein set forth.