Patent GB-190220244-A (GB)
Title: Improvements in Typewriters.
Inventor: KEMPF AUGUST
Filed: 1902-09-16
Granted: 1902-12-04
Abstract: 20,244. Kempf, A., and Kleefeld, F. Sept. 16. Type - writers. - The carriage 9 is guided by bars 3,4, ball races being formed between them. The bar 4 is transversely slotted at 5, Fig. 4, and is adjustable by means of screws 8. The platen 13 is supported by bearers 12 pivoted to arms 11 extending from the carriage. Two bands 16, 17 are secured to the carriage, the former passing directly to the drum 23, and the latter passing over a roller 38 and back to the drum 24. The one is t h u s adapted to draw the carriage to the left and the other to the right. The carriage i s provided with a rack 18 which gears with a pinion 51 on the shaft 48. Supported in brackets 19 at the left-hand side of the machine frame is a shaft 20 which carries a spring drum 21. The drums 23, 24 are adapted to be traversed on the shaft 20 by means of forks actuated from a special key 34, so that the drum 24 can be engaged with the spring drum 21 when it is desired to return the carriage at the end of a line. As the spring drum, therefore, drives the carriage in both directions, means must be provided for winding-up the spring. This is effected by means of a ratchetwheel 36, Fig. 4, on the shaft 20, the wheel being engaged by a pawl 37 on a vertical rod (not shown), which is reciprocated by the universal bar 43, Fig. 2. The key levers 40, bearing keys 41, are pivoted on a shaft 39, and each key lever bears a hook 42 engaging with the universal bar 43. A link 45 connects the universal bar to the escapement-dog rocker 46, which co-operates with the escapementwheel 47 loosely mounted on the shaft 48. A clutch consisting of opposed crown ratchet teeth 49 connects the escapement-wheel with the shaft, and enables the return movement of the carriage to be freely effected. By depressing a release key 64, connecting-levers and links are actuated so as to move the escapement-wheel 47 rearwards on the shaft 48, thus opening the clutch 49, and entirely freeing the carriage. When writing tabular matter, the carriage, thus freed, advances against a stop arranged in any known manner so as to arrest the carriage at the proper position for the next column. The type-bars 70, 71 are supported on two segmental bearers 68, 69, and are so arranged that they all strike the platen 13 at the same impression-point. Tension rods 76, 77 are pivoted to the hubs of the type-bars, and pass through holes in a guiding-plate 78. Their rear ends are slotted to receive the nose-pieces 86 of striking-levers 79, of which there is one for each key lever. When a key lever is depressed, the corresponding lever 79 is rocked rearwards, and the tension rod 76 is actuated so as to bring the type-bar 70 to the impression-point. If the shift key 90 and lever 89 are depressed, the guide-plate 78 is lifted, and the nose-piece 86 actuates the rod 77 instead of the rod 76, and causes the type - bar 71 to strike the platen. Line-spacing is effected automatically as follows :-The pawl which operates the ratchet. wheel 96, Fig. 10, of the platen roller 13 is carried by a lever 98 having an extension or finger 99 at the forward end. Towards the end of the return or right-hand movement of the carriage, the finger 99 passes beneath an inclined plate 102, and is depressed thereby, the platen being turned through one, two, or three line-spaces according to. the adjustment of the plate 102. During the leftward movement of the carriage, the finger 99 passes over the plate 102, which yields under spring control to allow its passage.