Patent GB-411280-A (GB)
Title: Improvements in typewriting machines
IPC: B41J1/32
Filed: 1933-05-11
Abstract: 411,280. Typewriters. MARX & CO., Ltd., L., Waddam's Pool Works, Dudley, Worcestershire.-(Marx & Co., Inc., L. ; 200, 5th Avenue, New York, U.S.A.) May 11, 1933, No. 13780. [Class 100 (iv).] Index type-wheel machines ; roller inking-arrangements.-In machines comprising a rocking frame supporting a type-wheel, an inking-roller is spring-supported in a bracket which is pivoted on the type-wheel shaft and is connected by a rod to the framework so that when the rocking frame is moved, the bracket rocks in the opposite direction and the inking- roller runs over the type-wheel. The machine may comprise also a typewheel, paper-carriage, and spacing- mechanism constructed in the manner described below. In the machine shown in Fig. 2, a type-wheel 31 is mounted in a rocking frame 28 which is pivoted by means of a pin 29 to a casing 20 secured to a base 16. The rocking frame is connected by links 26 to a pin 23 on a bail 24 which is pivoted on a rock-shaft 22 mounted in the casing. The type-wheel is set by means of an index-wheel 33 which is connected thereto by gears 36, 37. The type-wheel is rocked downwards, to type on a sheet passing over a platen 80, by depressing a key 25 which is pivoted on the shaft 22 and abuts on the bail 24. The rocking frame is connected to a returning-spring 99. The base and casing consist of sheet-metal parts having interengaging slots and tongues. A bracket 38, mounted on the type-wheel shaft 30, supports an inking-roller 41, and is connected by a rod 42 to the casing. The inking-roller is mounted on the upper line of a forked wire-spring 40 which is received in slots 39 in the bracket. When the type-wheel is depressed for impression, the bracket is rocked forwardly and the inking- roller runs over the types. Aligning for impression.-The gear 37 cooperates with an aligning-pawl 44 on an arm 43 which is pivoted on the rocking frame 28 and is connected to a spring 45. Type-wheels.-The type-wheel 31 consists of spaced discs 101 having channelled flanges which are crimped to a metal type-band 100. Paper carriages and supports ; sheet feeding and guiding arrangements.-The paper-carriage consists of a sheet-metal member 74 having indentations 75 constituting a feed-rack, and flanges 73 which slide in channels on a plate 71 secured to the base 16. The flanges have lugs 731 for engaging a stop 721. A plate 76 is secured to end plates 77 and the member 74, the end plates supporting a plate 78 which has a groove for receiving a platen 80 of hard rubber or the like. The platen is secured by tongues on the end plates. Feed-rollers 86 for the sheet S are mounted on a shaft 87 which is mounted in the end plates and lugs on the plate 76. The feed-rollers co-operate with rollers 84 on a shaft 83 which is mounted in dotted lugs 82 on the plate 76 and engages a spring 88. The shaft is provided with knobs, one of these having, at line-space intervals, recesses for engaging a detent-lug on a spring blade. The sheet is smoothed by means of a bail 93 mounted on the shaft 87. The sheet can be released by pressing inwards the legs 94 and thereby bowing the bail. Letter-spacing mechanism.-The rack 75 on the carriage 74 co-operates with a feed-pawl 58, Fig. 12, and a detent 65 arranged in a casing 19 secured to the base 16. The feed-pawl is mounted on a bell-crank 56 which is held in normal position by a spring 62. The detent can slide in slots in the casing and abuts on a spring 69. A plate 47, pivoted on the shaft 22, is connected by a link 46 to the rocking frame 28, and is formed with a slot 48 which receives the end 49 of a link 50 connected to the bellcrank 56. When the rocking frame is depressed, the bell-crank retracts the feed-pawl, and on return of the rocking frame, the spring 62 returns the bell-crank, and the feed-pawl effects letter-spacing. Letter-spacing without typing can be effected by means of a spacing-key 55 secured to the shaft 22, the end 49 of the link 50 being connected to an arm 52 secured to the shaft. Carriage - releasing arrangements.-On abnormal depression of the spacing-key 55, a lug 70 on a feed-pawl 58 releases the detent 65 by co-operation with a lug 66.