Patent GB-269267-A (GB)
Title: Improvements in and relating to fountain pens
IPC: B43K5/17
Filed: 1926-01-26
Abstract: 269,267. Narayan, P. Jan. 26, 1926. Nib-retracting reservoir pens; self-filling arrangements; regulating ink supply.-In a fountain pen of the type in which the nib is adapted to be projected through an aperture in the barrel, the aperture being automatically closed when the nib is retracted, and in which the flow of ink to the nib is automatically controlled by the projection and retraction of the nib, the flow of ink is controlled by a lift valve preferably opened during a part of the projecting movement and closed by a spring during the retraction of the nib. In addition, means for locking the nib in projected or retracted position, and for initiating the flow of ink, are provided. The nib 3 and feed-bar 2 are mounted in a socket 1 carrying the collapsable self-filling sac 6 and an enclosing sleeve 4. The lower end of the feed-duct 7 in the feed-bar 2 is normally closed by a valve 8 under the influence of a spring 9 bearing against a bracket 13 or a shoulder in the socket 1. The valve 8 carries a rod 10, the end of which passes through the duct 7 into the space between the nib and feed-bar, and is bent back through an aperture in the nib. The outer end is provided with a finger 11 adapted to engage, during projection of the nib, with a projection 12 on the barrel in order to open the valve. The aperture in the nib through which the rod 10 passes may be in the form of a longitudinal slot 28, Fig. 2, or an aperture 25, Fig. 8, the axis of which is parallel to the surface of the nib, the end of the rod being accommodated in a recess 26 in the nib. In the form shown in Fig. 2, the slot 28 is permanently covered by a sliding plate 27 attached to the rod 10 in order to prevent leakage of ink. Movement of the nib is effected by means of a button 18 secured to the sleeve 4 and having a slotted shank 17 slidable on a bar 14 in which the lever for deflating the sac is pivoted. The ends of the bar are reduced in thickness or are provided with recesses 19 with which the lower wall of the slot in the shank 17 engages under the influence of a spring.21 to hold the nib in either extreme position. A projection 23 is formed on the presserbar 22 and, when the nib is projected, lies under a button 24 in the barrel, so that by pressing on the button the sac can be compressed slightly to force ink to the nib. The self-filing mechanism is only operable when the nib is projected. One of the Provisional Specifications also describes the following features :-a. thin rubber or like disc is secured to the spring-mounted closure member for the aperture in the barrel and to a flange round the orifice to form an airtight closure when the nib is retracted; a flexible rubber or like sleeve is mounted round the base of the nib and feed-bar to seal the end of the barrel when the nib is projected; the rod 10 is bent to pass through a hole in the feed-bar and is then turned back to lie on the convex face of the nib; the spring controlling the button 18 is arranged inside the barrel; the nib and feed-bar are secured in the socket by means of a wedge; and the initial flow of ink is caused by a finger on the bar 14 or operated by the button 18 arranged to press on the sac.