Patent GB-182908-A (GB)
Title: An improved typewriter of the type-bar class
IPC: B41J7/90
Filed: 1921-04-11
Abstract: 182,908. Schaffer, W. April 11, 1921. Addition to 156,618. Type-bar machines; letter-spacing mechanism; types, aligning for impression.-The line-printing typewriter described in the parent Specification is adapted for printing justified lines by dividing each type-bar into a number of short type-bars which are of different widths, corresponding to the widths of the types thereon, and are, when in printing position, laterally movable to justify the line, for instance, by means of loose spaces. In the machine shown in Figs. 1 and 2, short typebars V, of different widths and having types on the top edge are mounted in horizontal compartments r of vertically-movable magazines q, the type-bars in each magazine carrying a case or fount of types, and there being as many magazines as there are letters in a line. The compartments have spring blades engaging grooves in the sides of the type-bars. Each magazine is associated with a lever o' for lifting the selected type-bar to the level of the table s, and a slide n<2> for pushing the type-bar to a position depending on the type to be selected. The type-bars engage resilient strips X on the table s, the strips being secured at the inner end to a strip y and being freely supported at the other end by a bar Z. Projections are provided at the ends of the type-bars, to prevent the types from rubbing on the top plate s<10>. The selecting operation is repeated for all the magazines, and the type-bars are then moved bodily by means of a carrier s' to bring the selected types to the printing line. The carrier consists of a bar u supported by levers t which are mounted on slides s<1> and co-operate with a laterally movable bar W. When the bar reaches the position W<1> it engages the levers and raises the bar u into aligning-notches in the typebars; the bar then moves with the type-bars, to the position W<2>. The type-bars are confined by adjustable stops W<4>, and the line is justified by inserting loose spaces 1, Fig. 7, having hooks or finger-pieces 2, and aligning-notches 3 for engaging the bar u. The types are inked by a travelling device p or by an ink-ribbon, and impression is effected by a swinging platen-roller a. The stops W<4> are adjustably secured by screws WW to scale-bars W<3> adjustable by means of right and left handed screws ss, tt. In printing short lines, the strips at the end of the line pass beneath ledges on the stops. The keyboard mechanism controlling the levers o<1> and slides n<2> is similar to that described in the parent Specification, and comprises two laterally-moving carriages g<1>, g<2> carrying sliding pieces e<1>, e<2> which control spring- urged stop-levers f<1>, f<2> on slides h<1>, h<2> respectively. The keys a operate bars b provided with shoulders c<1>, c<2> engaging cross-bars d<3>, d<4> which are carried by swinging arms d<1>, d<2> and engage the sliding pieces e<1>, e<2> respectively. The slides h<2> are connected to the pushers n<2>, and the slides h<1> are provided with rollers n<3> engaging cams o<3> on the levers o<1>. The setting of a line by means of the keys causes one stop-lever on each of the slides h<1>, h<2> to be turned downwards and upwards respectively; thereupon bars l<1>, l<2> are moved laterally in sequence and, by engaging the projecting stop-levers, move the slides differentially, the movements being communicated to the lifting-levers and pushers. The bars l<1>, l<2> are provided with spring blades adapted to engage laterally movable bars l<3>, l<4> for returning the stop-levers to the normal position, the movement of the bars l<3>, l<4> being limited by stops. The bars l<1>, l<2> are connected to racks e, f, g, Fig. 2, driven by sectors on a wheel c operated by a hand-crank uu. The carriages g<1>, g<2> are connected to a spring drum and are controlled by an escapement k operated by a universal bar i in the path of the bars b. Case-shift mechanism.-The bars n<2> can be adjusted relatively to the slides h<2> by means of a member k, Fig. 1, operated by a shift-key. Detents i for retaining the parts in the set position are released by a member n, when the slides are returned. Reflectors.-The set line can be inspected, before the type-bars are moved to the printing line, by means of a mirror VV, Fig. 1.