Patent GB-153898-A (GB)
Title: Typewriting machines
IPC: B41J27/12
Filed: 1920-11-01
Abstract: 153,898. Block, A. Nov. 10, 1919. [Convention date]. Void [Published under Sect. 91 of the Act]. Roller inking-arrangements.-Inking-apparatus comprising a distributing-cylinder and a type inking roller reciprocating into and out of the paths of the types is controlled by universal-bar mechanism from the keyboard and actuated by power derived from the spring drum of the letter spacing mechanism. Provision is also made for rendering the inking-apparatus inoperative as required for stencil-cutting &c. The apparatus may be applied to a type-lever machine having impression-bar mechanism also associated witl the spring drum as described in Specificatior 153,324, and is so shown in Fig. 1, located below the paper-carriage close to the impression-bar 12 in a frame 28 on a support 28<a>. The apparatus shown comprises an ink-fountain K with a knife and ductor roller 33<a>, a distributing-cylinder 27 with a distributing-roller 31, and a type-inking roller 32 travelling to and from the ductor roller 33<a> over the surface of the cylinder 27 into and out of the paths of the type-heads 4<b> near the printing position. The ink-fountain K is preferably located underneath the folding paper rest 38 for ready access. The type-inking roller 32 is mounted in spring-pressed holders 35 pivotec in carriers 34 on a shaft 34a, Fig. 18, co-axia with the distributing-cylinder, the roller shaft passing through slots in the carriers, so that the roller is maintained in frictional contact with the distributing-cylinder and can yield when it meets the types. One of the carriers 34 is formec with a curved heel which is toothed for engagement with a pinion 33 on the shaft of the ductor roller, to rotate the latter intermittingly as the type-inking roller returns to normal position in contact with the ductor roller. The shaft 34<a>, Figs. 4 and 18, is driven by rack-and-pinion gear 36, 34<b> from a shaft 40<a> and the distributing- cylinder is driven through a pinion 47 on its hub from a shaft 44<a>, the two shafts 40<a>, 44a being actuated through gearing 44 - - 40 from a segmental gear 42<b> on a rocker arm 42<a>, which is connected to a lever 42<e> held up against the pull of a spring 56a by a detent 57 that is tripped by the universal bar 9b. The lever 42e is restored to normal position, and the spring 56a again tensioned, by engagement of an arm 54 on a shaft 53 against the end of the lever. The shaft 53 is rocked during the intermittent letter-spacing movements of the paper-carriage, through a temporary connexion with a shaft 51 in constant gear with the spring drum 48, the temporary connexion being made by a, swinging gear carried by arms 53R on a rock-shaft 53R<2>, actuated through an intermediate rock-shaft 53R<3>, which is actuated by the sliding member C<2>, Fig. 1, of the universal-bar mechanism, in its forward movement, prior to actuation of the rock-shafts of the impression-bar mechanism and letterspacing mechanism, and is released subsequently to the latter in the return movement, the rocking parts being then restored by a spring to break the connexion with the shaft 51. The gearing of the inking-apparatus is so proportioned that the distributing-cylinder makes several revolutions during the travel of the inking-roller in either direction, and the inking-roller makes a complete to and fro movement in both the forward and backward movements of the segmental gear 42<b>. The means for rendering the apparatus inoperative consists of a rock-shaft R<3>, Fig. 4, operated by keys R<2> and provided with an arm R<5> carrying a detent R<6> for blocking the lever 42<e> against movement. The distributing-roller 31, Figs. 1 and 18, is arranged for longitudinal reciprocation on its shaft, and for this purpose comprises a rotary member connected to a sliding member 31b having a stud engaging in a groove 27a in a collar on the distributing-cylinder 27. The type-inking roller may serve as the distributing-roller, similar provision being made for endways reciprocation. The type-inking roller may also serve as the ductor roller.