Patent GB-191415675-A (GB)
Title: Improvements in or relating to Typewriters.
Inventor: GREINER PAUL
IPC: B41J35/00
Filed: 1914-06-30
Granted: 1915-06-30
Abstract: 15,675. Greiner, P. July 4, 1913, [Convention date]. Ink-ribbon mechanism; ribbon - key a c t i o n s ; letterspacing mechanism.-Relates to adjustable - throw vibrator mechanism of the kind in which the vibratorlever has alternative fulcra, and comprises a construction of universal bar for operating the ink - ribbon and the letter - spacing mechanisms. (1) The vibratorlever 18 is provided with pins 46, 47 working in slots 48, 49 in plates 50 and adapted to be engaged by the hooked ends 43, 44 of a bell-crank lever, which can be rocked by depressing a ribbon-key 30 to bring either hook into engagement, or can be set for stencilling with neither hook in engagement by means of a lever 26. The active pin is surrounded by the hook and the slot and is thus more accurately constrained than in arrangements in which a slotted lever is provided. The bell-crank lever is secured to a shaft 45 to which is secured a pinion 42 engaging toothed segments 40, 41 on levers 36, 37 loose on a shaft 35 and provided with lugs 38, 39 adapted to engage lugs 33, 34 on a link 32 connected to the kev 30. The link has a pin-and-slot connexion 52, 53 with a link 32 which is connected to a spring 54 secured to the shaft 45. On depressing the key 30, the link 32, by the engagement of the lugs 33, 38, depresses the lever 36, and the gearing 40, 42 rotates the shaft 45 and turns the hook 44 into engagement with the pin 47, the lever 37 being lifted by the gear 41. When the key is fully depressed, the lugs 34, 39 are at the same level, and the faces are held in contact by the tension of the spring 54, the tension being caused by the engagement of the pin 53 with the end of the slot 52 before the movement of the shaft 45 is completed. On releasing the key, the link 32 rises, and as soon as the lug 34 rises above the lug 39, the spring 54 draws the link to the right and sets the lug 34 over the lug 39. On the next depression of the key, the hook 43 is moved into engagement with the pin 48, and on release of the key, the' link is moved to the left by the spring 54 and the lug 33 is again brought over the lug 38. The lever 26, provided with connexions described below for silencing the feed of the ribbon, is also provided with a cam 29 adapted, on pulling forward the lever, to engage a pin 31 on the key 30 and thereby rotate the pinion into a position in which neither of the hooks 43, 44 is in engagement. (2) The action-levers 4 are extended below the key-levers to engage a universal bar formed of two independent rectangular frames 8, 9 for operating respectively the ribbon and the escapement mechanism, the frame 8 being adjustable to silence the ribbon mechanism. The frame 8 is carried by two links 10 secured to a shaft 11 and by a link 14 loose on a shaft 16, the shaft 11 carrying the ribbon-feeding pawl 12 and the link 14 being formed with an extension 15 connected bv a link 17 to the lever 18. The frame 9 is carried by a link loose on the shaft 11 and by links secured to the shaft 16, which is provided with an arm 21 connected to the escapement mechanism. The frame 8 has a pin-and-slot connexion with a link 24 connected to the lever 26, which, on being pulled forward, draws the frame 8 forward into a position in which it is out of the path of the levers 4, the feed being thereby silenced and the bell-crank lever being set in a neutral position as described above, so that the lever 18 can be drawn down slightly by the link 17, the pins 46, 47 dropping in the slots and the vibrator being silenced. The shaft 25 of the lever 26 is formed square and engages a forked retaining-spring 28.