GB372581A - A typewriter - Google Patents

Abstract

372,581. Typewriters. STARK, H., 46, Augustenstrasse, and EIBERT, F., 11, Kanalstrasse; both in Munich, Germany. June 5, 1931, No. 16424. Convention date, June 11, 1930. [Class 100 (iv).] Type-lever actions ; letter-spacing mechanism. -The universal bail is so connected to the carriage escapement, and the escapement is so formed that, besides spacing the carriage, it returns the type-levers without the use of return springs. The type-lever i, Figs. 1 and 2, is actuated by the key-lever j through a lever j<1>, and the nose i<1> on the type-lever strikes the universal bail b just before the moment of typing. The bail is thus driven back, moving an arm a which operates the escapement. The escapement consists of a disc s, bearing two concentric ratchet-wheels e, e<1> which leave a zig-zag path e<0> between them. In this path a roller c at the end of the arm a moves, the arm a being prevented from moving otherwise than radially by a supporting-arm d. ' The escapement has a tendency to rotate in the direction of the arrow, due to the carriage-rack b, coupled with it by the cog and ratchet g, f. Then as the arm a moves inward the roller c clears a tooth of the ratchet-wheel e in which it was housed and releases the carriage. The escapement rotates, and the roller c comes against a slope of the ratchet-wheel e<1> and is driven back smartly by the rotation so that the bail strikes the nose i<1> and returns the typelever. The roller c finally comes to rest in the next tooth of the ratchet-wheel e. The escapement, shown in Fig. 4, is in the form of a double rack h<0>, h<2> with pawls a<1>, a<0> engaging with them alternately. The pawls are connected by a link d<0> so that when pawl a‹ engages with rack h<2>, pawl a<1> does not engage rack h<0>, and vice versa. The arm a<1> is connected, as described above, to the bail. By the provision on the type-lever i of a straight part instead of the hook, for engaging the pin of the lever j<1> the motion of the type-lever is accelerated and, if desired, the segment and the type-levers can be lifted out as a unit.