GB432622A - Improvements in or relating to propelling pencils and holders for reserve leads therefor - Google Patents

Abstract

432,622. Pencil holders. ANGLO PENCIL CO., Ltd., Bank Chambers, Pelham Street, Nottingham. Nov. 23, 1934, No. 33753. Convention date, Dec. 13, 1933. [Class 146 (iii)] In a propelling-pencil of the type in which the lead is propelled in short steps by pressure upon a knob at the rear end of the pencil, there is provided a longitudinal cavity which in section resembles two parallel tubes communicating with each other along their length, one of which contains the lead and guides it to the tip of the pencil, while the other contains a wire or rod formed with teeth and reciprocatable in the tube by pressure upon the end knob to which it is connected, the teeth being engaged by a pawl-like part extending from a lead pusher which is situated in the lead guide tube. The pencil holder 1, which may be of wood, synthetic resin, or other material is formed in one piece or in two pieces joined along their length and has a longitudinal cavity 15 of the shape referred to, in which may be enclosed twin tubes 2, 3, having a communicating passage 13 between the tubes. The groove 15 extends obliquely so that the tube 2 which is concentric at the front end with the tip 5 is eccentric at the cap end, while the tube 3 becomes concentric with the holder at the cap end. A pusher wire 6 having an enlarged front end is caused to move forward in the tube by a toothed rod 4 with which the bent end 20 of the pusher engages by passing through the passage 13, the pusher being held frictionally against backward movement. The rod 4 is connected to the end knob 9 so that pressure thoreon moves the rod forward to advance the lead, the return movement being effected by a spring 8. The amount of longitudinal movement of the knob 9 is limited by a projection 26 on a tube fitted on the end of the holder which engages a longitudinal slot 23 in the knob. The slot 23 is provided with an extension in the form of an inverted U, which permits the cap and rod 4 to be rotated when the knob is in its forward position, so as to bring the teeth 16 of the rod 4 out of engagement with the pusher so that it and the lead may be pushed back into the holder 1. One limb of the U-shaped extension slot is left open so that the knob 9 and rod 4 may be removed. The inner side of the metal tip 5 may be ribbed to prevent rotation of the lead and the end 17 may be split.