Patent GB-225526-A (GB)
Title: An improved driving arrangement for line-printing typewriters
IPC: B41J7/90
Filed: 1924-10-30
Abstract: 225,526. Polygraphische Ges. Dec. 1, 1923, [Convention date]. Addition to 208,106. Type - bar machines; driving- mechanism. - The machine described in the parent Specification is improved by arranging the driving-mechanism to return the line-setting carriage and a units-counting device, and to actuate keycontrolled relay mechanism; improvements are made also in connection with the sliding plate for returning the type-bars to the magazines, the inking-mechanism, and the impression-platen. The sliding plate for returning the type-bars is now formed by a plate N8, Fig. 5<c>, secured to a laterally-movable bar N13, and a plate N10 adjustable on a graduated part of the bar; the plate N10 has a dovetail sleeve N11 which embraces the bar and is provided with a clamping-screw N12. The key-controlled relay mechanism comprises rollers geared to a pinion which is connected by a belt and bevel-gears to a continuously-driven shaft, the rollers co-operating, as described in Specification 210,731, with eccentric discs releasable by the keys. Carriage-returning mechanism. - The linesetting carriage R44, Fig. 1<a>, is connected by a chain R43 to a sprocket-wheel R17 loose on a shaft R6. When the carriage has been traversed across the machine to set the line, the shaft is rotated and the sprocket-wheel is, as described in Specification 220,611, coupled thereto by means of a clutch R12, the carriage being thereby returned. To effect return of the carriage simultaneously with the actuation of the typebar pushers, the shaft may be driven by means of the pinion ST2 that drives the type-bar pushers. As shown, the shaft is geared to an horizontal shaft which is driven by a belt R41 from the shaft of the pinion ST2. Letter-spacing mechanism. - The carriagereturning shaft R6 may be employed also for returning a units-counting rail R22. For this purpose, the rail engages a loose pinion R21 which can be coupled to the shaft by means of a clutch R13. Aligning for impression. - The type-bars V4, Fig. 2<a>, are aligned by means of a member, preferably a wheel r, which is, as described in Specification 222,885, traversed in the direction of the line and co-operates with grooves in the type-bars. The wheel is mounted on a carriage consisting of bar r<1> which can slide and rock on a tube F20 and is provided with a roller r<2> running in a guide F22. The carriage may be traversed by means of the chain F9 employed for traversing the inking-roller carriage. The chain passes through the tube and over rollers F10, the tube being slotted to permit connection of the chain to the carriages. Platen-impression arrangements; platen rotation for inspection of writing. For adjusting impression, the rod D5, Fig. 4a, that actuates the rocking arm D6 carrying the platen-roller D7 is associated with an eccentric adjusting-device. After impression, the platen-roller is rotated to bring the line D7<1> into view by means of a link D21 pivotally connected to a stationary bracket D22 and an arm D20 on the platen shaft. Roller inking-arrangements. - The messenger roller F16, Fig. 3<a>, is, as described in Specification 223,902, moved into contact with the duct roller F15 at each printing operation. The messenger roller is preferably carried by a lever F30 having an arm in the path of a projection D20 on the platen-operating rod D5. A spring F31 normally holds the lever in the raised position. The lever may have a pawl F32 for rotating the duct roller.