Patent GB-244095-A (GB)
Title: Improvements in portable typewriters
IPC: B41J3/36
Filed: 1925-12-02
Abstract: 244,095. Merz, Geb. Dec. 6, 1924, [Convention date]. Portable type-lever machines. -An action of the kind comprising draw-bars connecting the key-levers to intermediate levers is arranged in the following manner, chiefly for the purpose of reducing the vertical and and front-to-rear dimensions of the machine, whilst permitting of the employment of a standard keyboard and a vertical typelever segment. Key-stems b are pivoted on bell-cranks c connected bv draw-bars e to intermediate levers f which are connected by draw-bars e' to the type-levers q the draw-bars e being arranged horizontally at the bottom of the machine to prevent interference with the key-stems. and being connected to the intermediate levers by upwardly bent members h. The key-stems pass through slots in angle bars a<10>, the edses of the slots being turned down to form guides and the key-stems being tapered upwardly to prevent rattling. The key-stems engage pivots c<1> on the bell-cranks and are retained by springs c<2>. Fig. 9. The intermediate levers are pivoted on a rod f<1> at the bottom of the machine and are arranged immediately behind the rear row of keys. The bell-cranks are pivoted in sets of four on bridges d, each oblique column of keys being associated with one of the sets. and the bridges being formed with lateral steps to permit of arranging the bell-cranks in the same fore-and-aft planes as the associated keystems. The bridges are secured by ears d', d<2> to the front plate a' of the framework, and a cross-bar a<5>. The bell-cranks rock on bushes c<3>, Fig. 9, secured to the bridges by headed screws c<4>. The draw-bars e associated with the key-stems in the front row are formed with offsets to prevent fouling of the rear row of bell-cranks. The drawbars e have lateral hooks e<3> engaging holes in the bell-cranks, and the members h have threaded eyes receiving the draw-bars. To permit of arranging the associated key-stems, draw-bars e and intermediate levers in the same vertical planes, the members h are offset on the side opposite to the hooks e<3>. The pivot f<1> of the intermediate levers is mounted in brackets on a crossbar a<6>, returning-springs l for the action being connected to hooks l<1>, l<2> on the intermediate levers and the cross-bar. To facilitate assembling, the intermediate levers can be locked by pushing a rod through holes in the framework and holes f<3> in the intermediate levers. The draw-bars e<1> aro screwed to inclined members pivotally connected to the heels of the type-levers. The typelevers g are mounted on a pivot g<1> in a vertical segment i having widely spaced guide-slots. The segment is secured to a vertical plane a<9>, Fig. 3, formed on inclined members a<7> secured to flanges on the sides of the framework. To reduce the height of the machine, the type-heads are inclined rearwardly, the printing point being above the horizontal plane containing the axis of the platen n. The platen may have a shift-support consisting of levers pivoted at the rear and arranged so that the shift plane is parallel to the type-heads. To provide room for the middle intermediate levers f, the type-lever rest o is flattened at the middle and is inclined. Space-key actions; keys.-Arms a<12> supporting the space-key m pass between the bridges d and are secured to a shaft a<11>. The space-key may be provided with an inlay of rubber, celluloid, oraluminium.