Patent GB-191327254-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: ALBERTSON ERNEST HOWARD
IPC: B41J3/37
Filed: 1913-11-26
Granted: 1914-11-26
Abstract: 27,254. Albertson, E. H., and Mayo, A. Nov. 26. Type-lever actions; space and shift key actions ; folding machines.-The key-levers are pivoted in the front part of the framework and each engage one of a series of cam-levers pivoted in the back part of the framework and connected to the typelevers and the spacing and carriage-shift mechanisms. The front part of the framework may be hinged to the back part and be arranged to fold with the keyboard over the platen, the loose connexion between the key-levers and the cam-levers permitting such folding. (1) In the machine shown, the cam-levers i<9> are pivoted in a comb j<2> and engage rollers on depending arms on the keylevers, the writing-key levers e<2> and the two levers g<2> to which the space-bar g is secured being formed with vertical arms pivoted in a comb h<2>, and the shift-keys f, one at each side of the machine, being formed with vertical arms secured to a rock-shaft h<5>. The cam-levers associated with the writing-keys are connected by links i<8> to type-levers i. (2) The cam-levers associated with the shift-keys are connected by links k<7> to bell-crank levers k<8> having pin-and-slot connexions k<10> with bars m which support the carriage n<2> and are mounted for vertical movement on pairs of links m<2>. The bars m normally rest on adjusting-screws m<5>. (3) The front part b of the framework is hinged at b<7> to the back part a, and is formed with flanges c<5> normally engaged by pivoted spring catches c<7> which are turned up when the machine is to be folded. The front part is secured in the folded position by a catch t<2> pivoted to the paper-shelf s<5> and provided with a tungue t<3> and a pivoted hook t<4> adapted when the shelf is drawn forward to engage under and over the plate b<3> of the front part. Letter-spacing mechanism; ink-ribbon mechanism. -(1) The cam-levers i<9>, Fig. 3, associated with the writing and space keys engage a universal bar k secured to arms k<3> pivoted on studs k<3> and connected to returning-springs k<5>. To prevent operation of the universal bar by the shift-keys, the universal bar is shorter than the series of camlevers and the arms k<2> are set inwardly to provide spaces in which the cam-levers associated with the shift-keys can work. (2) The universal bar is connected by a link s, Fig. 3, to a vertical lever provided with an ordinary fast-and-loose dog escapement r<2> engaging a rack p<7> on the carriage n<2> (3) The universal bar is connected by a link and levers (not shown) to a ribbon vibrator and by links v and levers v<2> to slides v<4> carrying pawls engaging ratchet-wheels v<7> on the ribbon spools, these being provided with the usual clamping-nuts v<9> for reversing the feed. Carriage-releasing arrangements.-The feed-rack p<7> is secured to arms p<6> journaled on the platen-axle n<3> and formed with finger-pieces w<3> whereby the feedrack can be moved for carriage-release. A spring w normally holds the feed-rack against stops w<2>. Line-spacing mechanism.-The line-spacing lever o<8>, Fig. 1, is secured to a rock-sbaft o<7> provided with an arm o<9> carrying a pawl p which engages a face-ratchet wheel p<2>. A spring detent p' also engages the ratchet-wheel. Paper-carriages.-The carriage n<2> is provided with grooved runners m<8> mounted by balls m<9> on grooved rails m<7> secured to the shift-bars m. The balls are mounted in spacers and stops m<11>, m<12> are provided in the rails and the runners for limiting the movements of the carriage. The runners are provided with rollers o' which engage the bottom surfaces of the rails. Paper-shelves; paper feeding and guiding arrangements.-The shelf s<5> and the apron s<6> are pivoted by ears on a rod s<4>, the shelf being formed with fiogers s'‹ which press the apron against the platen. The apron is provided with a feed-roller s<14> and the fingers s'‹ carry a feed-roller s<12> arranged in an opening in the apron.