Patent GB-190313495-A (GB)
Title: Improvements in Type Casting and Composing Machines.
Inventor: WEHRLIN MAURICE
Filed: 1903-06-16
Granted: 1904-05-19
Abstract: 13,495. Wehrlin, M. June 16. Monotype and like machines.-Relates to movable type casting and composing machines operated by register-bands, especially of the type described in Specification No. 13,891, A.D. 1897, and to a device whereby, without increasing the number of combinations of perforations in the band, or the number of dies, two kinds of type may be composed. The two sorts of type may be quite independent as regards shape and thickness. Each die 11, Fig. 13, receives on its periphery six impressions, three in the usual printing-type and three in italics or other distinguishing-type. The apparatus for moving the die into the casting position is controlled by three electromagnets 16, 17, 18, Figs. 1 and 9, in the main frame 19. When the armature 20 of the magnet 16 is attracted, an arm 22 is raised, and is kept raised by a spring 24 when the armature is released. Similar arms 25, 26, Figs. 1 and 2, are operated by the magnets 17, 18. Above the main frame and within reach of the arms 22, 25, 26 are pivoted three levers 33, 34, 35. The arm 22 being in its raised position, a cam 30, Fig. 2, on the reciprocating carriage 13 moves it against the lever 35, the movement of which operates a ratchet-wheel 56. A square extension below the ratchet-wheel actuates a lever 59, which, in turn, communicates a partial rotation to a disc 64 which is loosely mounted on a shaft 67, Figs. 1 and 9, and bears on a plate 68 fixed to the shaft. The shaft is capable of endwise but not rotary motion. The lower part of the shaft carries a plate 71, held down by springs 73 and provided with downwardly-projecting pins 75. The disc 64 is provided with two slots. Above the disc two toothed racks 78, 79, Figs. 2 and 9, work in vertical guideways, each rack having a heel 80, 81 engaged in a groove of the disc. The racks gear, one on each side, with a toothed wheel 82, Fig. 1, on a shaft 83. A disc 87 at the end of the shaft has a diametrical slot, and the mandrel 92 which receives the dies, as described in the previous Specification, also has a disc 91 with a diametrical slot, the two slots engaging with projections 88, 90, at right-angles to one another and on opposite sides of a disc 89. The mandrel may thus be rotated in one direction or the opposite, so as to print ordinary or italic characters, by raising one or other of the racks. The disc 64, Figs. 2 and 9, is so arranged that in each of its two positions, one of the slots is under the heel of one of the racks, so that when the shaft 67 and disc are raised bodily, only one of the racks is raised, the other passing through the corresponding slot. The particular character to be cast is determined by the amount of rotation which is imparted to the shaft 83 and which is controlled by discs 46, 47, 50. The discs 46, 47 lie under the pins 75, and normally present to the pins two wide slots 44, 45 into which the pins can pass without touching the discs each time the latter are raised. The shaft 49 carrying the fixed disc 50 and the rotary discs 46, 47 is raised at each forward stroke of the carriage by a lever 95, which is operated by an inclined plane 94 on the carriage, the lever being returned by a spring piston 101. The discs 46, 47 are connected by Jinks 40, 41 to arms on the spindles 36, 37, to which are connected the levers 33, 34, so that when one or the other of these levers is actuated by the corresponding arms 25 or 26, the corresponding disc is partially rotated so as to present a solid part of the disc instead of the slot to the pins 75. This three varying amounts of lift may be given to the plate 71 and consequently to the rack which actuates the shaft 83, according to the position of the discs 46, 47. The tail ends of all the levers are operated by a cam 32, Fig. 2, on the return stroke of the carriage, the levers all being returned to their normal positions. The arms 22 &c. are returned to their normal positions by cams 31 on the forward stroke of the carriage after the arms have been moved to actuate the levers. To ensure the exact positioning of the die for the casting, a disc 36 secured to the shaft 83 is provided in its periphery with mortices corresponding to the positions of the impressions of the die but diametrically opposite to them. A seventh mortice is provided midway between the two sets of impressions. A stop wedge 104 normally engages with one of the mortices, and is withdrawn by a cam-actuated lever at each backward and forward stroke of the carriage, to allow the rotation of the shaft. As described in the prior Specification, a rotary distributer working over pairs of segments causes the making of the circuits corresponding to the different perforations to be successive and not simultaneous. The register bands have, as before, seven rows of perforations, the first five of which control the placing of the dies on the mandrel. The armature of the electromagnet 17, Fig. 1, supports an insulated spring, which acts as a commutator by resting against one or the other of two contactpieces and completes one or the other of two circuits which contain, respectively, the electromagnets 16, 18. When a perforation 7 presents itself without a corresponding perforation 6, the magnet 18 alone acts on the mechanism and produces the casting of a punctuation sign or a cipher. Similarly, when a perforation 6 appears without a corresponding perforation 7, the magnet 17 produces the casting of a capital letter. When a perforation 6 appears with a perforation 7, the magnet 17 acts on the mechanism and also prepares the magnet 16 for being influenced by the perforation 7. The perforation 3, occurring alone, controls the casting of a space, but if accompanied by the two perforations 6, 7 it controls the beginning and end of the distinguishing-type when the latter occurs in the course of a line. The perforation 1 occurring alone, controls the ascension of a line terminating towards the galley, but if accompanied by perforations 6, 7 it also controls the beginning and end of the distinguishing-type when the latter begins and ends at the same time as the line.