GB149403A - Improvements in typewriting machines - Google Patents

Abstract

149,403. Reddie, L. N., (Olivetti & Co., C.). May 8, 1919. Type-lever actions.-Relates to actions of the kind in which the type-levers are connected by links to the top of radially disposed sub-levers which are pivoted at the bottom and are connected at points between the top and bottom to key-operated links, and consists in arranging the type-lever links to remain horizontal during operation. In the action shown in Fig. 1, a keylever 6 operated by a key 1 is connected by a link 11 to a radial sub-lever 13 which is connected bv a push link 19 to a type-lever 21, the link 19 remaining horizontal in operation. The push links 19 may be replaced by pull links. The key-levers 6 and links 11 move in vertical planes parallel to the middle plane of the machine. The sub-levers are formed with slots 30 for engaging a wire 14 on a segment 15, and are formed also with an ear 16 which is bent into the vertical plane and receives a pivot 12. The type-levers are formed with hooks 25 for engaging a wire 22 on a segment 28. The key-levers are formed with slots for engaging a wire 7 supported by slotted blocks 8. The links 11 are provided with cylindrical or spherical pivots 10, 12, the pivot 12 being preferably carried by a spring fork 17 which is threaded on the link. The links 19 consist of two spring plates, provided with cylindrical or spherical pivots 18, 20, the pivot 18 being riveted to both plates, and the pivot 20 being riveted to one plate and having a projection which enters a hole in the other plate. Keys.-Returning-springs 32, adjustable to vary the touch, are arranged between the sub-levers 13 and a laterally adjustable segment 35, the springs being connected to the segment by means of hooks 33 which enter holes 34. The segment is pivoted at the ends upon the arms 38 of a rock shaft 39 and is provided at the middle with a pin 41 passing through a hole in the framework 42, and provided with nuts 44 for adjusting the segment. Letter-spacing mechanism.-A universal bar 46 operated by shoulders 23 on the type-levers, is pivoted upon the arms 50 of a rock-shaft 51 and is provided with an arm 54 operating an arm 56 in connexion with the escapement and ink-ribbon mechanism. The arm 54 may be forked to engage a pin on the arm 56. The arms 50 are pivoted at 49 to plates arranged between the universal bar and a plate 47 which is secured at the ends to the universal bar. The pivots 52, 49, 55, 57 may be provided with ball bearings.