Patent GB-182145-A (GB)
Title: Improved apparatus for printing and copying music and the like
IPC: B41J3/34
Filed: 1920-12-24
Abstract: 182,145. Walton, T. Dec. 24, 1020. Type-wheel machines; machines with types separate ; machines for writing music.-A machine for printing a large number of characters, for instance musical or oriental characters, comprises a carrier or magazine provided with a number of type-rows or holders, sets of keys for selecting a row or holder, and a second set of keys for selecting a type in that row or holder. In the machine shown in Fig. 2, the types are mounted in rows on a drum 1, and type-selection is effected by turning the drum to select a row, and moving the paper-support 15 longitudinally to select a type, impression being effected by means of a hammer 58. The keys 8 for turning the drum are secured to levers 16 engaging two tracker-bars 28 which are pivoted at the ends and are each arranged under half the keyboard, uniform depression of the keys imparting graded movements to the trackerbars. The drum is provided at each and with a pinion 4 engaging a sector 2 provided with an arm 31 engaging a link 27 which is operated by a bell-crank 9 connected by a link 8<a> to the associated tracker-bar. The sector 2 is returned to normal position by springs 3. The keys 32 for moving the paper-support are secured to levers 32<a>, 32<b> engaging tracker-bars 35, 36 connected to horizontally movable levers 40 engaging rollers 34 on the paper-support. The paper-support is returned to normal position by springs, and is retained by a spring-catch. In the machine shown in Fig. 4, holders 98 for loose types 99 are detachably mounted in a magazine 94 consisting of two endless bands 95 passing over pulleys 96, 97; cr, a rotary magazine may be employed. On moving the magazine by means of keys 100, the selected holder is brought to the front of the machine, and is then detached and placed on a carriage 110 movable longitudinally by means of keys 132 to bring the selected type into engagement with a hammer 120 which is thereupon swung upwards for impression, the paper being supported on a carriage 91. The keylevers 101 operate tracker-bars 104 engaging bellcranks 105 connected to sectors 107 which gear with pinions 108 on the pulley 97. Keys.-The keys 32, Fig. 2, are associated with indicator-bands 70, 71 geared to the type-drum 1 and arranged so that when any row of types is brought, by the operation of one of the keys 8, to the printing line, the type-characters in that row are displayed on the keys 32 by the bands. Preferably the bands pass over pulleys 82, 83 which are arranged inside box-shaped members, constituting the keys 32 and key-levers 32<a>, 32<b>, and are secured to shafts 80, 81 connected by bevelgears 76 - - 79 to pinions 74, 75 driven by the pinions 72 on the type-drum. Similar indicatorbands 136a may be provided for the keys 132, Fig. 4. In some cases the keys 132 may be revoluble and be geared to the magazine 94. Hammer-impression arrangements.-The hammer 58, Fig. 2, is pivoted on the paper-support 15 and is operated by means of an impressionkey 42 engaging a lever 49 adapted to rock a ball 52 which engages the hammer. The hammer strikes through a slot in a paper-shield 87. The hammer 120, Fig. 4, comprises type-grippers 109 and a sleeve 122 arranged so that on depressing an impression-key 125 the sleeve moves forwards to close the grippers and is then swung upwards. In a modification, the gripper is formed with a pin for engaging an axial hole in the type. Letter-spacing mechanism.-The paper 28, Fig. 2, receives vertical, letter-spacing movement by means of feed-rollers operated by a ratchet-wheel 62 engaging a pawl 61 on an arm 64 which is connected by a link 60 to the impression-hammer 58. The spacing is regulated bv adjusting the link. Roller inking-arrangements.-An inking-roller 140, Fig. 4, is drawn over the type 99 by means of a link, operated by the impression-key 125, and is returned into contact with a pad by means of a spring.