Patent GB-189819026-A (GB)
Title: Improvements in Type-writing Machines.
Inventor: THOMPSON WILLIAM PHILLIPS
Filed: 1898-09-06
Granted: 1898-11-12
Abstract: 19,026. Thompson, W. P., [Century Machine Co.]. Sept. 6. Type - writers.-Relates more particularly to machines such as are described in Specification No. 16,081, A.D. 1897. Fig. 3 shows a sectional elevation. The machine has a plurality of type-bars 10, each bearing a sleeve 32 formed with several longitudinal rows of types. The ends 9 of the type-bars are pivoted to the ends of horizontal bars 8 pivoted to links or arms 6, 7, the lower ends of which are pivoted between a series of plates 5 under the base-plate 1. The upper ends of the arms 7 are enlarged, and each is formed with slots 19, 20, 21 engaged by pins 22 on three of the vertically-sliding key stems 23. When either of the outer keys of the three is depressed, its pin engages one of the inclined slots 20, 21 and the arm 7 is oscillated and moves the bar 8 so that the type-bar is shifted to print one or other of the end characters in a longitudinal row. When the central key is depressed, its pin 22 engages the vertical slot 19, and the arm 7 is not oscillated, so that the central character is printed. The bars 8 are held in normal position by two-armed springs 12 engaging pins 14 on the bars. These springs are fixed on stationary posts 11, and their ends are held in position by studs 13. Each type-bar is operated to make the impression by a rod 18<a> connected to a lever 15 pivoted to the corresponding arm 6 and having a pin 16 moving in a slot 17 in the arm 7. The ends of the rod 18<a> are connected by universal joints. On the key stems 23 corresponding to each lever 15 are arms 27 which engage and depress the lever, and which are of such length that they act upon the lever at a like distance from its fulcrum. The ends of the levers 15 pass down and are guided by slots in a bar 57. The sleeve 32 is journalled on the end of the type-bar, and is pressed by a spring 33 against a collar 39 having a projection which engages notches in the end of the sleeve, to hold it with any of its three longitudinal rows of types in printing position. When the type-bars are in normal raised position, reduced portions on the sleeve engage notches or recesses in a curved plate 29 which forms part of the framing. On the plate 29 slides a curved rack bar 35 having teeth engaging recesses or teeth formed in the sleeves. The bar 35 is moved in one direction or the other by shift keys so as to bring the two outer rows of types into printing position. The two shift keys slide in the framing similarly to the keys 23, and each is provided with an inclined arm engaging a pin on a sliding bar 51. One shift key moves this bar in one direction, and the other moves it in the opposite direction. The bar 51 operates a lever 53 connected by a rod 18, having universal joints, to one end of the rack bar 35. The latter is held in its normal central position by a two-armed spring similar to 12. The sliding bar also operates a toggle by which the slotted bar 57 is moved longitudinally to bring a second set of slots under the levers 15, so that, unless the shift keys be fully depressed, the levers 15 cannot move downward. The bar 57, being prevented from returning until the type-bar &c. are returned to normal position, also prevents the return of the rack 35 &c., so that all the type sleeves are returned on the return of the rack. The platen 64 is mounted in a carriage 65 sliding on a guide-way 67, and a rack 68 is operated to move the carriage by two pawls 75, 76 pivoted on a sliding frame 69 operated by levers 72 engaged by the levers 15 and space key. The types may be inked by a felt &c. roller 80 on the swinging arm 79.