Patent GB-189924045-A (GB)
Title: Improvements in or relating to Typewriting Machines.
Inventor: FOLEY JAMES SAMUEL
Filed: 1899-12-02
Granted: 1900-09-15
Abstract: 24,045. Foley, J. S., and Birch, J. H. Dec. 2. Type-writers.-The key levers Y, Fig. 12, are of inverted U-section, and the links Y<1> are secured to them by U-shaped clips Y<2> passing through slots Y<3> and adjustably secured by bolts Y'. The type - bars X, Fig. 11, are made in one piece, and are preferably T-shaped in cross-section. T h e t y p eblock X<1> is riveted by a neck X<2> to the type-bar, and may be adjusted thereon by the exercise of sufficient force. The machine is provided with two shift keys S, T, Fig. 7. The depression of either of these keys shifts the carriage by rocking the shaft R. If the "figure" key T is depressed, the shaft R is rocked to its full extent, the catch R<1> passing beneath the raised hook P. If, however, the "capital" key S is depressed, the arm S' releases the hook P, and the carriage can only be moved to an intermediate position determined by the engagement of the catch R<1> with the hook P. The carriage may be locked for printing capitals or figures continuously by means of a rotary cam or wedge w h i c h locks a plate extending from the rock-shaft. Two margin stops are provided, consisting of sleeves loosely fitting round a bar supported on the carriage. Each sleeve is provided with a short internal projection which can be made to engage with any one of a series of holes in the bar. A stationary stop on the frame co-acts with the margin stops. One of the margin stops carries a pivoted arm which actuates the hammer of the alarm bell. The carriage scale rests on the paper above the printing point, and is tensioned at each end by springs U', Fig. 10, connected to splined screws U<3> having heads U<6> fitting within the adjusting-nuts U<4>. The inking-ribbon mechanism is shown in elevation in Fig. 2, and in plan in Fig. 3. The whole mechanism is made adjustable longitudinally with respect to the platen by securing it to a bar C by means of screws passing through slots C<1> in the bar. A rod C<2> extending from the inking-mechanism can be clamped to the bar C at the left-hand end by a bolt C<4>. This longitudinal adjustment enables the whole of the width of the ribbon passing round the guide or shield F to be utilized, and also enables the pinion D<3> to be engaged with a hand-operated gearwheel, not shown, when it is desired to wind a new ribbon on the left-hand spool D. Each spool D bears a ratchet-wheel D<1> driven by a pawl G having an extension G<3> which holds the detent H against the wheel. Springs K press the pawls G towards the ratchet-wheels. The pawls are carried by pivoted levers G<1> operated from a universal bar by links G'. A frame J, pivoted at J<1>, bears pins J<3> adapted to engage with recesses H<1> so as to withdraw the detent and pawl from either of the spools according as the right or left hand end of the frame is depressed. The movement of the frame J may be effected by depressing the head of one of the upstanding arms J', but automatic means for shifting the frame as each spool empties in turn are also provided. They consist of arms J' pivoted to the frame J and pressed inwards by counterweights J<5> The arm J<4> is adapted to enter a slot in the drum of the empty ribbon spool, and a catch J<6> then takes up a position above the hook G<4> so that, when the link G<2> next rises, the frame J is thrown over and the movement of the ribbon reversed. The ribbon-shield F is hinged at F<1>, Fig. 5, and can be thrown up into the vertical position by depressing the extensible link F'. This may be done by means of a spring. controlled arm F<3> resting on a star-shaped cam fixed on the shaft of a ratchet-wheel operated by a pawl-carrying key. Successive depressions of this key rotate the cam L and alternately raise and lower the ribbon shield. The cam L may be dispensed with, and the arm F<3> rocked directly by a key which can be locked in the depressed position by means of a rotary cam or wedge adapted to grip an arm extending upwards from the key. A plate O<1>, Fig. 3, hinged to the bar C beneath the ribbon shield, serves to indicate the printing point on the paper.