Patent GB-190501278-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: JAMES REGINALD WILLIAM
Filed: 1905-01-23
Granted: 1905-06-29
Abstract: 1278. James, R. W., [Union Typewriter Co.]. Jan. 23. Typewriters. -Relates to typewriter inking- ribbon vibrating- mechanism, and particularly to multi - colour or like arrangements. A "Monarch" machine is shown sectionally in Fig. 1. The ribbon 42 is divided longitudinally into two fields a, b of different characteristics, for example of different colours, or the one of copying-ribbon and the other of record ribbon. The ribbon feed mechanism is of known form, the spring drum 40 driving a shaft 50 movable longitudinally for gearing alternately with shafts 47 geared with the spool shafts 43. The ribbon vibrator 53 is forked at the lower end and carries a pin 57, which is embraced by the slotted forward end of an operating-lever 58 pivoted in a lug 60. The rear arm of the lever 58 is formed with an elongated slot 61 to receive a pin 62 on a spring-retained link 63, which is connected at the lower end of the universal-bar frame 35, and is formed at the upper end as a strap for an eccentric ribbon-throw controller 68 keyed on the shaft 50. The controller 68, Figs. 1, 3, and 5, comprises a comparatively narrow, eccentric working face 69, a tapered portion 70, and a sleeve portion 71 keyed on the shaft 50 by means of a screw 73 and a slot 74. A pull-and-push rod 85 carries a switching-member 75, which is formed with a fork 78 embracing a recessed part 72 of the controller 68, and is provided with forward and rear arms 79, 80 having shoulders 81, 83 and lugs or hooks 82, 84. The rod 85 is formed with notches 87, 88, 89 for engagement by a locking-spring 90. A link 93, provided with a pin 94 for engagement in the slot 61 of the lever 58, but normally out of engagement, is. connected with the universal-bar frame forward of the link 63 so as to give a higher throw. When the parts are in the position shown in Figs. 1 and 3, the pin 62 is moved in relation to the fulcrum 59 of the lever 58 by means of the eccentric face 69, and consequently the ribbon throw is variable and the impressions are in two colours; for ordinary work,-the ribbon 42 may be replaced by a one-colour ribbon. The variable throw is prevented by setting the rod 85 at the notch 88, in which case the part 69 is moved out of engagement with the link 63, and the parts 82, 84 engage the links 93, 63 as shown in Fig. 5. Setting of the' rod 85 at the notch 89 brings the lower field b of the ribbon into operation at uniform throw, by moving the link 63 from, and the link 93 into, connexion with the lever 58. Similarly, in the case of an ordinary ribbon, first the upper portion may be used, and then the lower portion, to obtain the maximum amount of ink. A composite ribbon, shown in Fig. 7, may be used. The central portion c is of one colour only, the end portions have two fields a, b, and non-printing indicating-portions d are left between the central and end portions. On return of the rod 85, Fig. 3, to its first position, the part 70 facilitates engagement of the strap part of the link 63 on the eccentric face 69, and the parts 81, 83 return the links 93, 63. In order to be able to hold the ribbon inoperative, as required in preparing stencils for mimeograph work, the link 93 is dispensed with.