GB354383A - Improvements in actions for typewriting machines - Google Patents

Abstract

354,383. Typewriters. HESS, E. B., 645, East Marks Street, Orlando, Florida, and ROYAL TYPEWRITER CO., Inc., 316, Broadway, New York, both in U.S.A. May 9, 1930, No. 14392. [Class 100 (iv).] Type-lever actions ; types ; hammer-impression arrangement.-Type-blocks mounted on the typelevers are moved for impression by means operated by the key-levers. In the action shown in Fig. 1, type-levers 7 are pivotally suspended from a segment 4, each type-lever being provided with a sliding type-block 44 and being connected to a toggle 11, 13 which is connected by a yielding link 21 to a key-lever 18. The lower part of the link can slide in an adjustable sleeve 22 on the upper part, and has a head resting on a spring. An impression plunger 26, movable in a guide 24 in the top plate 3. is connected to a toggle 27, 29 which abuts on a block 31 and is connected bv a link 36 to an arm 38 on a universal bail 41 operated by the key-levers. The printing point is visible when the impression plunger is in normal position. Depression of any key-lever straightens the associated toggle 11, 13 and thereby moves the type-lever into the horizontal position, and on further depression of the key-lever the toggle 27, 29 is straightened and the impression plunger moves the type-block for impression. On release of the keylever, the action is returned by means of springs 48, 23, 13<1>. Impression is adjusted by means of a knob 33 carried by a rod 32 which engages the block 31 and is threaded into the top plate, a pointer 34 on the knob being arranged over a dial. Pads 17, 42, 142 limit the movements of the toggles and type-levers. In a modified action, the heel of each type-lever is connected by a yielding link, an intermediate lever, and another link to the keylever, and the universal bail rocks an arm into position for supporting the type-lever in the horizontal position. The type-block 44 may slide in a housing 46, Fig. 6, on the type-lever and engage a returning-spring 45 which is inserted in recesses in the type-block and type-lever, the arrangement permitting of detachment of the type-block and spring. The housing may be angularly adjustable on the type-lever. The type-block 50 shown in Fig. 9 is attached to a plate 52 by rods 51 guided in a web 53 on the type-lever, a returning-spring 54 being arranged between the web and plate. The rods may be arranged to engage grooves in the impression plunger, the plate being omitted. Specifications 20519/91 and 3040/92, [both in Clasps 100, Printing, Letterpress &c.], are referred to. Aligning for impression.-The impression plunger 26, Fig. 1, may have a projection 73, Fig. 14, for engaging the type-block 44, and a wall 72 for engaging the type-block housing 46 to align the types. The type-levers 7, Fig. 1, may have projections for engaging the front of the usual aligning-fork.