US444094A - Combined pocket-knife and pencil-guard - Google Patents

Description

G. T. DRABBLE. COMBINED POCKET KNIFE vAND PENCIL CUAED.

(No Model.)

Patented Jam. 6, 1891.

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UNITED STATES PATENT OFFICE.

GEORGE T. DRABBLE, OF SI-IELBURNE FALLS, MASSACHUSETTS.

COMBINED POCKET-KNIFE AND PENCILFGUARD.

SPECIFICATION forming part of Letters Patent No. 444,094, dated January 6, 1891.

Application filed June 3, 189i). Serial No. 354,155. (No model.)

To all whom t may concern.-

Be it known that I, GEORGE T. DRABBLE, a subject of the Queen of Great Britain, residing at Shelburne Falls, in the county of Franklin and State of Massachusetts, have invented a certain new and useful Improvement in Combined Pocket-Knives and Pencil-Guards, of which the following is a specification.

My device is a cheap and compact construction adapted to fit on either end of an ordinary wood-bodied pencil, so as to serve as a guard for the point when it is applied on the sharpened end of the pencil. When it is applied on the opposite end of the pencil, it is supported thereby, so as to facilitate its use as a knife. It can also,when thus applied, serve as a guard for the ordinary wellknown rubber tip inserted in the end of the pencil. 4

My device is provided with a pivoted knifeblade adapted to be opened and closed, and the parts are arranged to hold the blade securely in the opened or closed position. Then open, it serves for sharpening pencils, erasing, dac., the same as a small pocket-knife. When closed,it is of no effect, the same as in ordinary pocket-knives.

The following is a description of what I consider the best means of carrying out the invention.

The accompanying drawings form a part of this specification.

Figure 1 is a side view showing this device attached to a pencil and with the knife in the closed condition and the slide adjusted to hold it firmly closed. Fig. 2 is a corresponding view with the knife open and the slide moved outward to hold the blade fully in that position. The remaining figures are on a larger scale. Fig. 3 is a central longitudinal section. The condition indicated by the strong lines in this figure is the same as that in Fig. 1. The condition indicated by dotted lines in this figure is the same as that in Fig. 2. Fig. 4. is an end View corresponding to Fig. 3. Figs. 5 and 6 show the interior metallic part, which I term the plug, detached. Fig. 5 is a central longitudinal section, and Fig. 6 an end view.

Similar letters of reference indicate corresponding parts in all the figures where they occur.

A is the wood body, a the lead, and a the rubber of an ordinary lead-pencil.

B is a tube, of hard brass or other suitable material, with its end squarely closed, as indicated by B. A narrow slot b is produced by sawing or otherwise extending a considerable distance along the mainbody of B, and across some three-fourths of the diameter of B.

C is a cylindrical plug, of iron or other suitable material, adapted to tightly fill the interior of the tube B and to match against the inside of the end B. This plug is almost divided longitudinally and centrally by a saw-kerf c, which extends in from one edge, and bya shallower kerf c,which -is produced by the same or asimilar saw on the opposite side of the plug. A hole c2 is bored or otherwise produced radially through the small portion of the metal remaining between these kerfs and appearing nearly triangular in longitudinal section near the inner end of the plug.

D D is a narrow spring of L form, having the short arm D engaged in the hole c2, the main body D extending longitudinally, as shown. A rivet e is set in a hole bored or otherwise produced through the tube LB and plug C transversely to the slot c.

E is a knife-blade corresponding to that of a pocket-knife, but small and short. It is mounted in the slot c and turns on the rivet e. n

The spring D performs the useful functions of a spring in holding the knife in the open and closed position. y The end of the blade may, if desired, be square, so as to present two corners, which shall force away the spring as it is opened and closed. I prefer it about as shown, leaving a sufficient fiat surface extending beyond the line of the rivet e to hold the blade in tolerable firmness in the open or closed position. The parts are so proportioned and arranged that when the blade is opened the offset in the back thereof abuts against the exterior'of the end B of the tube B.

G is a .slide encompassing the tube and adapted to be moved endwise thereon. Then the blade is opened, this slide should be moved out into the position shown by dotted lines in Fig. 3. In this position it aids to hold the knife firmly open. To close the knife-blade'and secure it in the closed posi- IOO tion the slide G must rst be moved down on the tube ll, then thc knife closed, and then the slide G be moved back until it engages on the exterior of the knife-blade. The back of the knife-blade may be recessed alittle, as shown, to better engage with the edge of this slide and allow it to be reliably locked th creby in the closed position. Before opening the knife the slide G must be again moved down on the tube, so as to set the blade free. The end of the slide is formed with rounded notches g, which receive theends of the rivet e. In applying this rivet an excessive length is provided, and each end is allowed to protrude in a smoothly-rounded form. These serve as stops to prevent the slide G from being moved too far.

Modifications may be made without departing frein the principle or sacrificing the advantages of the invention.

The plug C may be soldered or sweated within the tube B, so as to form a unit therewith. I believe it maybe possible to make l these parts in one.

Parts of the invention can be used without the whole. I can use the spring D D ar-I ranged as shown without. the slide G. In

such case the spring must be relied o n alone to hold the blade with proper firmness in the opened or closed position; or I can use the slide G alone without the spring D D. In such ease thc slide will by bearing fairly against the proper portions of the blade hold the latter either in the opened or closed position. This forni of the device may be pre' foi-red for the cheapest style of construction. If the rivet c is formed without the projecting heads, the notches g in the slide G may be dispensed with; but other means should be provided to insure that thc slide be retained reliably upon the tube under all conditions.

My tube B and its attachments may be made and sold as articles of manufacture indepen dently of the pencil and be applied upon any pencils of ordinary size.

My device will ordinarily ontlast a number of pencils. It may be used independently of the pencil, if necessary in any case; but the presence of the pencil is an advantage by serving as a prolongation or handle.

I claim as my inventionl. The tubo B, plug C, having the kerf c, blade E, and rivet e, combined and arranged for joint operation relatively to each other and to a lead-pencil, as herein specified.

i. The tube D, plug C, having the kerf c, blade E, and rivet c, in combination with thc spring D D and slide G, or either of them, adapted to serve as herein specified.

In testimony whereof I have hereunto set my han d,at Northampton, Ilam pshire county, Massachusetts, this 29th day of May, 1890, in thc presence of two subscribing witnesses.

GEO. T. ]`)RA'BI%LE. lVitnesses:

Clins. R. BUSCH, J 1'., PHILIP ll. CLASS.

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