Patent GB-190614801-A (GB)
Title: Improvements in Typewriting Machines
Inventor: GESSNER REICHSGRAEFIN LILLIAN
Filed: 1906-06-28
Granted: 1907-01-17
Abstract: 14,801. Gessner, L. de Chambrun, Reichsgraefin von, and Bontempi, A. June 28. Typewriters. -' Relates to typewriters more especially for writing in books. (I) The printing- mechanism, shown in Figs. 2, 4, 6, and 7, comprises a key - set type carriage fitted with hammer-actuated sliding types and traversed for line spacing longitudinally of a platen rotated for letter-spacing. Three cases 17, 17<a>, 17<b>, each fitted with two rows of spring-supported types, are free to slide transversely of the platen 5 in the support 22, against the returning action of spring 22<c> on end frames 22b moving in guides 22<a>. This transverse adjustment is effected by means of arms 34<a>, 34<b> on sleeves 32<a> feathered on shafts 6, 7.and connected by an arm 32 to an upright 31 on the type carriage. The shafts 6, 7 are rocked from the key-levers 82 through curved heads on the keylevers, swinging plates 85a, 85<b>, pins 88 on the swinging plates, and crank-arms. 89 on the shafts 6, 7. The support 22 is mounted by guides 24 in connected sleeves 26, 27, the former working on a screw shaft 45 for line-spacing, and the latter being feathered oh a shaft 56 and provided with a helicoidal cam groove 29 co-operating with a projection 30 on the support' 22 for case shift or second case line adjustment on rocking the shaft 56. The shaft 56 is rocked by means of a pinion 59 on the shaft, a segmental rack 60 on a bell-crank lever 61, two case-shift key-levers 73 engaging the lever 61 for different throws, and three lugs 63<a>, 63<b>, 63<c>, corresponding to the three cases, provided on a curved piece 62 on the lever 61 and engaged by an arm 65 actuated from a universal bar 70, which is notched at 81 so 'that it is depressed only by the second case line key-levers 82. The hammer 36 is actuated by a tappet arm 38 on a'sleeve 39, feathered on a shaft 40 and to the sleeve 26. The shaft 40 is rocked from a second universal bar 90 moved by all the key-levers 82. A curved arm 91 on the bar 90 engages with an arm 92 of a bell-crank lever having pin-and-slot connexion 95, 96 with an arm on the shaft 40. The blow is varied by means of an adjustable stop for the bar 90. The screw shaft 45 is actuated for line-spacing by means of a toothed wheel 47 and a yielding rack 50 on a spring-returned slide bar 48 provided with a key 49; the spacing is varied by means of an adjustable stop pin. (2) The platen, paper or work clamps, and escapement mechanism for letter-spacing are shown in Figs. 2 and 4. -The platen 5 is mounted in uprights 3, 4 over a baseplate 1 on which the book is placed, the leaf to be written upon being passed over the platen. The clamps comprise an endless elastic band 14 stretched on rollers 9, 13, the former on a frame 8 sliding on the shafts 6, 7, and the latter on a frame 10 depressible on the frame 8 and notched for adjustment on a tooth on the frame 8.. The platen is provided with pinions 100, 101 engaging with pinions 102, 103 on a shaft 104. A driving-spring is housed within the pinion 103.. Engaging with the pinion 100 is a pinion 112 carrying an escapement wheel 113 controlled by a dog 114 provided with fixed and yielding teeth 117, 116 and actuated from the universal bar 90. A key lever 117<a> is connected with the dog 114 for escapement release. For platen return, a sliding rack bar 120 is provided. in engagement with the pinions 102, 112. For back-spacing through one space, a key-lever 118<a> is arranged to engage the escapement wheel. (3) The platen scale, margin stop, and alarm arrangements are shown in Figs. 2 and 4. A disk 106, provided with numbered openings forming the scale and receiving an adjustable margin stop 109, is secured on the shaft 104. A fixed projection on the framing co-operates with the margin stop and also with the striker of an alarm bell 111 secured on the shaft 104 in front of the scale 106. (4) The inking-mechanism is shown in Figs. 2, 6, and 8. Two inking-pads 123<a>, 123 are carried by a plate 122 pivoted at 124 to a depending portion 125 of the type carriage and normally held up by a spring 124<a>. The front and rear type cases 17, 17 are provided with bevelled lugs 126, 127, which, according to theshift of the support 22, rest in openings 128, 129 or ride in pathways 130, 131 and depress the plate 122.