GB431274A - Improvements in and relating to pens - Google Patents

Abstract

431,274. Pens. WAHL CO., 1800, Roscoe Street, Chicago, U.S.A. Jan. 23, 1934, No. 2329. Convention date, Jan. 23, 1933. [Class 146 (iii)] A pen-nib is provided with an adjusting member slidable longitudinally of the two resilient prongs and having parts engaging the prongs and adapted to hold portions thereof against outward flexure under writing pressure, and also a forwardly extending part adapted to resist upward flexure of the prongs, thus providing a means for effecting a variation in the proportion of the prongs susceptible to outward flexure. The adjusting member is in the form of a plate 16, provided with an aperture 16a and lugs 19 which extend through longitudinal slots 14, symmetrically arranged in the nib 10, and are locked in a keeper 20 formed of thin resilient material and located on the underside of the nib. The slide 16 is provided with a projection 17 which carries a detent adapted to engage the knurled part 15 of the nib and hold the slide in adjusted position, may be sufficient for this purpose, the effect of the adjustment being to vary the effective length and consequently the flexibility of the prongs 11, and in the case of a fountain pen to vary in addition the ink flow by controlling the lateral spread of the prongs. In the case of a fountain pen, the feed-bar is recessed to accommodate the keeper 20, and the sides of the feed-bar are cut-away to provide clearance for the lugs 19. In a modification, the keeper is formed in two parts which are arranged in slightly spaced relationship on each side of the slit 13 in the nib ; by this means, the underside of the nib is brought into contact with the upper surface of the feed-bar, which is only cut away at the sides to accommodate the lugs 19 and the keeper plates.