US2128052A - Fountain pen - Google Patents

Description

Patented Aug. 23, 1938 UNITED STATES PATENT OFFICE FOUNTAIN PEN Charles J. MacNally, Jamaica, N. Y. Application March 31, 1937, Serial No. 133,964

'7 Claims.

This invention relates to fountain pens and more particularly to that class of pens known to the trade as self filling pens in which the ink is drawn up into the barrel of the pen by a reciprocating piston, and has for its object the production of a pen simple in construction, cheap in cost of manufacture and easily assembled.

Another object of this invention is to provide a fountain pen of this type so constructed that it may be made of short ends of standard tubing which may otherwise have little or no value, but assembled in such a manner as to provide a smooth gripping surface for the fingers with a barrel substantially uniform. in diameter throughout its length.

The foregoing and other features of my invention will now be described in connection with the accompanying drawing forming part of this specification in which I have represented my improved fountain pen in one of its preferred forms, after which I shall point out more particularly in the claims those features which I believe to be new and of my own invention.

In the drawing,

Figure 1 is a longitudinal section through my pen barrel.

Figure 2 is a longitudinal section through the cover cap.

Figure 3 is a cross section along the line 3-3, Figure 1.

In the carrying out of my invention I employ three short lengths of tubing ll, l2 and I3, all substantially of the same length. Tubes H and I3 are substantially the same diameter, while I2 is smaller in diameter with an outside diameter substantially the same as the inside diameter of the other two tubes.

Tube H is threaded internally on both ends and externally on one end as shown. Tube I2 is threaded externally on one end and internally on the other as shown. These tubes are screw threaded together at M. Tube ll forms the ink chamber of my pen, while tube l2 forms the housing for the working portion of my device. While I have shown these tubes secured together by interfitting threads, they may be secured by any known means which may be convenient or desirable, such as a press fit or the telescope portions may be coalesced by a chemical process to form the two tubes into substantially one piece, the improvement being that these short pieces of tubes are firmly secured together so that a definite and positive internal shoulder l5 and an external shoulder l6 are provided. Tube ll may be made of translucent material to show the amount of ink within the chamber.

Tube l3 has an out tube H and an inside than the outside diameter of tube the easy turning ther In the end of tube I der 11 so that the side diameter equivalent to diameter sufiiciently larger II to permit eon when secured in place. 3 I provide a reamed shoulflange 20 which is screw threaded into or otherwise fastened to the tube I2 rides on the shoulder l1 preventing the tube l3 from coming off the tube l2.

A piston 30 preferably of cork, is provided with a tubular piston rod 3| having a screw threaded interior 32 adapted to is secured into the c engage the screw 33 which ap 34. This cap 34 is cemented into the end of tube 13. As the tube I3 is turned on tube 12 the piston 30 is reciprocated within the ink chamber ll through the medium of the inter-operating nut 32 The ink chamber away from.

is provided with the 4| and pen point 42.

For a cap I provide vided with the usual and screw 33.

the operating end usual pen section 40', feed a length of tubing 50 proscrew threaded interior 5| the ink in the feed.

On. the end of this plug 53 away from the shoulder 5 I provide a chamber 56 which may be used for the storage of ink pellets. This end of the plug is provided with a screw thread 51- on cap 58.

I wish it distinctly which I mount a closure understood that my fountain pen herein described and illustrated is in the form in which I desire to construct it and that changes or variations may be made as may be convenient or desirable without departing from the salient features of my invention and I therefore intend the following claims to cover such modifications as naturally fall within the lines of invention. I claim:

1. In a fountain pen, in combination a barrel comprising two interfitting cylindrical tubes of substantially the same length, the outside diameter of the smaller tube being substantially equal to the inside diameter of the larger tube, a piston mounted to reciprocate within the larger tube and provided with a the inside of the sma tubular rod extending into ller tube, said rod provided 4. The device of claim 1 including the interfit- I ting tubes being telescopically joined.

5. The device of claim 1 including the interfitting tubes being coalesced into an integral Whole.

6. The device of claim 1 including the larger tube being made of translucent material with the smaller tube being of opaque material.

7. The device of claim 1 including means to prevent the removal of the cap from the smaller tube including a. flanged ferrule secured to the smaller tube, the flange engaging a shoulder on the interior surface of the cap.

CHARLES J. MACNALLY.

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