Patent GB-190416147-A (GB)
Title: Improvements in Type-writing Machines.
Inventor: WHITE JAMES DUNDAS
Filed: 1904-07-21
Granted: 1905-06-01
Abstract: 16,147. White, J. D. July 21. Type-writers &c.-A type-writing, stenographic, or like machine is constructed for spacing without lateral movement of the types or paper, by using a type-cylinder and a hammer-cylinder of the kind described in Specification No. 24,025, A.D. 1903, [Abridgment Class Electric telegraphs &c.], the type cylinder 1, Fig. 1, having circular series of types repeated in longitudinal rows, and the hammer-cylinder 8 having a spiral series of impact faces. Operating -mechanism comprising keys, lines, and pulleys, and somewhat similar to that described in Specification No. 7105, A.D. 1903, is shown in Figs. 1, 4, and 5. Alternative forms of paper-feeding device are shown in Figs. 2 and 10. In operation, the type-cylinder 1 is adjusted by the key movement for the row of the types, the hammer-cylinder 8 is advanced step-by-step at each key-movement to select the particular type in the row, and the paper 7, which is located between the cylinders and behind the printing-ribbon 6, is advanced step by step after each key movement. The paper may be fed over rollers parallel to the cylinders, in which case, as shown, the printed lines are inclined ; or the rollers may be inclined to obtain the lines at right-angles. The typecylinder 1, Figs. 1 and 2, is on a shaft 9, which is rotated, against the returning action of a line 10 and spring 11, by means of a line 13 connected with a pulley system comprising pulleys 15, 20, 25, 30, Fig. 4, lines 16, 21, 26, 31, and keys 19, 24, 29, 34, 37, Fig. 5. The system is arranged in the reverse order to that described in Specification No. 7105, A.D. 1903, in order that the weight of the pulleys may not operate to move the typecylinder. Each pulley line is limited by two adjustable check lines, as 41, 42 for the line 16, and is connected through a spring to its key, as 18 for the key 19. The pulley lines are relieved of the weight of the keys by springs, as 61 for the key 19. The check lines are so arranged that the lines 16, 21, 26, aud the inner end of the line 31 have the same range of movement, but the outer end of the line 31 has only half that range, so that the keys, in order, effect a movement of the typecylinder through one, two, four, eight, and sixteen rows, and combinations of the keys effect the other required movements. The keys may be differentiated by colour, and a scale containing representations of the combinations by coloured bands may be attached. The hammer-cylinder 8, Figs. 1 and 2, is mounted on a shaft 72 in a pivoted, spring-retained, rocking frame 73, and is provided with a ratchet 75 co-operating with a detent pawl 76 and a pawl 77 on a pivoted gravitating arm 78, which is limited by check lines 79, 80, and is actuated by means of a line 83 connected by lines 88, 89, 90, 91, 92, Fig. 5, to the five keys. These lines are, normally, stack, and the connecting- springs of the pulley lines are of such stiffness that, after a key movement sufficient for adjustment of the type-cylinder, further movement is possible and effects adjustment and rocking of the hammer-cylinder, but is without effect on the typecylinder. The type-cylinder is shown as provided with two blank rows 3, 4, Fig. 2, of which the row 3 is, normally, in the printing position, and the row 4 is for feeding without printing, a projecting arm 5 opposite the row 4 engaging a stop-arm 81 on the frame 73. In the feeding-device shown in Fig. 2, the paper 7 passes between rollers 97, 98, the latter of which is provided with a ratchetwheel 100 co-operating with a detent pawl 101 and a pawl 102 on a pivoted arm 103, which is actuated by means of a spring 105 and a line 106 attached to the frame 73. In the feeding-device shown in Fig. 10, the paper 7 passes between a toothed platen 110 and co-operating pawls 109 pivoted on the frame 73.