US1780405A - Pencil - Google Patents

Description

P. A. SHARROW PENCIL F'ledDeo. 16, 1929 Nov. 4, 1930.

Patented Nov. 4, 1930 PATENT OFFICE PERCY A. SHARROW, OF EAST WINDSOR, ONTARIO, CANADA PENCIL Application tiled December 16, 1929. Serial No. 414,308.

My invention relates to a new and useful improvement in a pencil, particularly one of the mechanical feeding type wherein the lead is fed mechanically from a retainer, thus dispensing with the necessity Vof sharpening the pencil. It isan object of the present invention to provide a lead retainer which will be longitudinally movable of the pencil proper while being used so that a floating type of point is provided.

It is another object of the present inven tion to provide a pencil of this class in which the writing point or lead will be so retained that it will automatically accommodate itself to various pressuers which may be exerted `upon it, thus preventing a breaking of the point, an economizing of the lead used, and affording a pencil with which a smooth and easy writing may be effected.

Another object of the invention is the provision of a pencil in which uniformity of writing may be obtained, resulting in a clear legible writing, and especially vbeneficial where a lead pencil is used extensively for producing an original and a carbon copy at the same time.

Another object of the invention is the provision of adjusting means whereby the resistance of the point to longitudinal movement may be adjusted to various pressures.

Other objects will appear hereinafter.

The invention consists in the combination and arrangement of parts hereinafter described and claimed.

The invention will be best understood by a reference to the accompanying drawings which form a part of this specification and in which,

Fig. 1 is a side elevational view of the 1nvention.

Fig. 2 is a longitudinal central sectional view of the invention.

Fig. 3 is a sectional view taken on lin 3-3 of Fig. 2.

Fig. 4 is a sectional view taken on line 4--4 of Fig. 2. n

Fig. 5 is a sectional view taken on line 5-5 of Fig. 2.

The invention comprises a sleeve or barrel 8 in which a supply of leads may be deposited.

tainer 17.

'the barrel 8 may be rotated by rotating the cap 10. A spider 11 is secured within the barrel 8 and an outwardly projecting neck 12 being formed on the base 18 of the barrel 8 which is formed'cup shaped. A square tube 14 is projected through the spider 11 and through the neck 12 of the base so that a rotation of the barrel 8 will effect a rotation of the tube Y 14. Slidably positioned in the tube 14 is a` square plunger 15 having a reduced stem 16 projected therefrom and threaded in the lead retainer 17, the stem 16 serving as a Afeeder for feeding the lead 19 outwardly through the passage 18.V It will be noted that the member 17 is threaded to within a short distance of its end so that the member 16 may follow when threaded downwardly to the end to eject the lead. A reduced extension 36 is formed on the member 16 of substantially the. same size as the lead 19 and the unthreaded portion 37 of the bore, formed in the member 17 is of the same diameter as the lead 19 and the member 36 so that a firm bearing is afforded for the lead. VA barrel 22 has its end 24 turned inwardly to engage ina peripheral channel formed by pressing inwardly the bead 25 on the barrel 9 so that the barrel 22 is rotatably mounted on the barrel 9. The lower end 23 of the barrel 22 is tapered and formed solid and provided'with the central bore in which is slidably mounted the lead retainer 17. Y

A threaded neck 27 Vprojects outwardly from the base 26 of the barrel 9 which is also formed cupshaped. Threaded on the neck 27 is a disc 28 provided with the peripheral notches 28` Vin which engages the inwardly projecting ribs 28 which are'formed on the barrel 22. One end of the spring 29 engages the face of the disc 28 and the other' end engages the flange 30 formed on the lead re- A boss 31 projects upwardly from the center of the disc 30 and serves as a guide for the spring 29.

is threaded to .project the lead 19 the :proper distance, the pencil is ready for use. As the point of the pencil is pressed against the paper the retainer 17 may be moved easily upwardly in the barrel 22 against the tension of ythe spring 29. In this way a floating point is obtained. The tension of the spring 29 may be adjusted by a rotation of the bar rel 9 so vas to move the engagement disc 28 axially of the barrel 22. The graduations 32 will serve to indicate various positions of adjustment so that the user may determine the posi- A.tion to which the graduations determine the proper tension for his easy writing with the encil. p Thile I have illustrated and described the preferred form of construction I do not wish to limit myself to the precise details of structure shown but desire to avail myself of such variations and modifications as may come within the scope of the appended claims.

I-Iaving thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A pencil of the class described, comprising: a hollow body forming portion; a lead retainer slidably mounted in said body forming portion; a lead feeding member threaded into said retainer and movable in unison therewith; and resilient means for normally resisting movement of said retainer; and means for adjusting the tension of said resilient means.

2. A pencil of the class described, comprising z a body forming portion formed from a pairv of rotatably mounted axially iixed barrel forming members; a lead retainer slidably mounted in the end of one of said barrel forming members; resilient means in said barrel forming member for resisting slidable movement of said retainer; an engagement disc slidably mounted in said barrel forming member and engaging one end of said spring, and engaging oneend of said engaging means, the opposite end engaging said retainer; a threaded projection on said other barrel forming member threaded into said disc, the relative rotation of said barrel forming members effecting an adjustment of the tension of said resilient means.

3. A pencil of theclass described, comprising: a pairof rotatably mounted axially fixed barrel forming members providing the main body of said pencil; a lead retainer slidably mounted in the end .of `one of `said barrel forming members; a lead feeding member threaded into said retainer and extending into each of said barrel forming members; an engagement disc slidably mounted in one of said barrel forming members and non-rotative relatively thereto; a threaded projection on the other of said barrel forming members threaded into said disc, relative rotation of said barrel forming members effecting axial movement of said disc; and a spring posi- .tioned between said discand said lead retainer for normally resisting slidable movement of said lead retainer.

4. A pencil of the class described, comprising: a hollow body forming portion; a lead retainer slidably mounted in said body forming portion and projected through one end thereof; a flange projecting peripherally from the inner end of said retainer; means threaded in said retainer for feeding a lead therefrom; anda spring in said hollow body engaging'said flange and resisting inward movement of said retainer.

A pencil of the class described, comprising: a hollow body forming portion; a lead retainer slidably mounted in said body forming portion and projected through one end thereof; a flange projecting peripherally from the inner end of said retainer; means threaded in said retainer for feeding a lead therefrom; and a spring in said hollow body engaging said flange and resisting inward movement of said retainer; and means for rotating said feeding means for feeding said lead.

6. A pencil of the class described, comprising: a barrel forming member; a tapered end on said barrel having an opening formed centrally therein; a retaining member slidably mountedin said barrel and projected through said opening and adapted upon full outward Athrust for forming with its youter surface' a continuation of said taper, said retainer having a lead receiving passage formed therein.

7. A pencil of the class described, comprising: a barrel forming member; a tapered endv on said barrel having an opening formed centrally therein; a retaining member slidably mounted in said barrel and projected through said opening and adapted upon full outward thrust for forming with its outer surface a continuation of said taper, said retainer having a lead receiving passage formed therein; and resilient means in said barrel for normally resisting inward movement of said retaining member.

In testimony whereof I have signed the foregoing specification.

PERCY A. SHARROW.

Images