Patent GB-158576-A (GB)
Title: Improvements relating to typewriting machines
IPC: B41J1/00
Filed: 1921-01-28
Abstract: 158,576. Sandor, F. March 5, 1919, [Convention date]. Type - lever machines. - A visible - writing machine can be divided on a transverse vertical plane into two parts A, B, Fig. 1, carrying the action and paper-carriage respectively, the arrangement enabling different actions and papercarriages to be substituted for those in use. When assembled, the parts are united by a detachable coupling, for instance, screws passing through holes 1, and tongues and guides 7, 8. Preferably, the front part supports the keyboard and action, universal bar, and ink-ribbon mechanism a, and the rear part supports the paper-carriage and associated devices such as the shift, spacing, and margin devices. Type-lever actions.-A transverse plate 9, Figs. 3 and 4, secured to the front part A of the framework, is formed with slotted segments 24, 14 supporting radial sub-levers 18 and type-levers 12 respectively. The type-levers are pivoted on a wire 15 and are formed with slots 17 engaging pins 19 on the sub-levers. The sub-levers are formed with arcuate slots 20, 21 for engaging wires 22, 23 respectively, and are connected by links 26 to the key-levers 29. The sub-levers rock initially on the wire 22, and finally on the wire 23, the arrangement imparting an accelerated movement to the type-levers. The wires 15, 23, 22 are concentric. Returning-springs 31 are connected to the links and sub-levers, these springs serving also to prevent the type-lever from rebounding from the rest 13. The slots 20, 21 are open at the front, and, on detaching the link pivots 30<1>, the sub-levers can be detached and withdrawn through an opening 9<1> in the plate 9. To permit detachment of the type-levers, the slots 17 are formed with openings. The opening 9' permits the simultaneous cutting of a pair of guide-slots 93, 94 in the segments 14, 24. Platen-shift mechanism; shift-key actions.- The platen frame d, Fig. 3, is provided with a roller 69 running on a rail 68 formed on a plate 51 which is mounted on levers 73 on the rear part B of the machine, and is guided vertically by rollers 70. A counterbalancing-spring 74 is connected to the levers. A shift-key is connected by a link 67 to an arm 69 which is mounted on a spindle 37 supported by the plate 9 in the front part A of the machine, the arm being formed with an eccentric part 79 engaging a roller 76 on the plate 51. A lug 78 on the arm normally engages a lug 77 on the plate 51 and retains the latter in the depressed position. The Specification as open to inspection under Sect. 91 (3) (a) describes a shift mounting for the platen frame. This subject-matter does not appear in the Specification as accepted, but now forms the subject-matter of Specification 179,120. Letter-spacing mechanism; space-key actions.- A universal bail 33, operated by shoulders 32 on the type-levers, is secured to arms 43 on a spindle 42 which is carried by arms 40, 41 mounted on the spindle 37. A returning-spring 47 is connected to the arm 40. An escapement-rocker 46 abuts on a rod 44 provided with a plate 49 in the path of the spindle 42. The rocker and rod are mounted on the part B of the machine. The space-key 36 is connected by a link to an arm 34 which is mounted on the spindle 37 and abuts on the plate 49. The Specification as open to inspection under Sect. 91 (3) (a) describes an escapement. This subject-matter does not appear in the Specification as accepted, but now forms the subject-matter of Specification 179,119. Back-spacing mechanism.-A back-spacing dog co-operating with the escapement wheel 91 is mounted on a lever which is pivoted on the rear part B of the machine and is engaged by the inclined end of a slide operated by an arm 82 which is mounted on the spindle 37 and is connected to a key disposed in the keyboard. The lever and arm may be provided with rollers for engaging the slide. Alarms; carriage stops; Line-rocking devices.- A bar on the platen frame d, Fig. 6, carries a stop 55 co-operating with a member 53 having slots engaging studs 52 on the platen-shift plate 51. When near line-end position, the stop rocks the member 53 by riding over a lug 54, and an arm 59 operates a bell 56. The stop then engages a lug 57 and pushes the member 53 to the left, the arm 59 thereupon obstructing the plate 49 on the escapement-operating rod 44, and locking the universal bar 33. The locking of the universal bar prevents the type-levers 12 from striking the paper. The lock can be released by means of a push-key 62 having an inclined end engaging a lever 64 which co-operates with a pin 65 on the member 63. Key-locks.-The Specification as open to inspection under Sect. 91 (3) (a) describes a shift-key lock consisting of a push-pin adapted to engage the shift-key lever, a spring releasing the pushpin upon a slight further depression of the shiftkey. This subject-matter does not appear in the Specification as accepted. Paper-carriages; dust-excluders for actions; carriage-releasing arrangements; ink-ribbon mechanism.-This subject-matter, which was contained in the Specification as open to inspection under Sect. 91 (3) (a), does not appear in the Specification as accepted, but now forms the subjectmatter of Specifications 179,118, 179,119, and 179,120.