by the stop 82, which moving into engagement with the back of the stop-arm 80 always carries said stop-arm with it when the gear-wheel 23 is released to follow up a movement of the 755wheel 22.
The shifting of the coupling member 84 away from its normal position, in which it is coupled to the complementary member 83, may be effected in any desired manner, but preferably by a shifting-lever, such as 92, one. end of which works in the slot 93 and which is 780preferably held in its coupled position by means of a spring, such as 94, and is operated in the other direction to release the coupling 785member 83 by means of an electromagnet 95, controlled by the dash-signals of the code characters received by the instrument. When the dot-signal is received, however, this magnet is not operated. As the different dot and 790dash signals of the respective periods from the first to the sixth are received the wheel 22 will first be turned a distance representative of the particular character-selecting component represented by the electrical signal 795received, and said wheel will then be stopped and the wheel 23 will have an equal movement following up that of the wheel 22 in order to permit the wheel 22 to be free to turn again when another character-selecting component 800is brought into action. Thus the wheel 22 advances by successive partial rotations representative of the electrical signal components of the code characters received until the last partial movement representing the last signal 805component is printed, when the wheel will have added a series of values the total of which will represent and determine the location at the printing-point of the language character corresponding to the code character 810received. Provision must of course be made for returning each language character after its selection and after printing to its original position.
While the character-selecting means just 815described may be caused to select indicating or recording devices illustrating language characters organized in any well-known manner, I have shown herein a plurality of these characters or types disposed about the 820periphery of a type-wheel 100, which is normally coupled to the shaft 21, but is released after printing in order that it may return to a zero position and coöperate properly with the selecting mechanism when the next series of 825electrical signals is received. In this case said type-wheel has a hub 101 journaled in the end plate 102 of the instrument and formed at its inner end with coupling-teeth 103, which coöperate with a complementary 830coupling member 104, mounted on the shaft 21 and held against rotation by a stop pin or screw 105, but free to move axially on said shaft a distance represented by the slot 106. This coupling member 104 is peripherally 835grooved, as at 107, and is operated by means of a shifting-lever 108, controlled by a spring 109 and an electromagnet 110. When said electromagnet is energized, the type-wheel is released by the withdrawal of the coupling member 104 there from and is free to return840 to its zero position. This position in the present case is determined by a stop 111 on the end plate 102, against which stop a stop-arm 112 on the type-wheel strikes, when a return movement is imparted to said wheel.845 This return movement may be effected advantageously by a coiled spring 113, one end of which is fastened to the plate 102 and the other end of which is secured to the back wall of a groove in the hub in which the spring is850 coiled, as shown in Fig. 4.
The devices hereinbefore described are controlled solely by the ordinary dot and dash components of a telegraphic code-that is, by signal components of two values. Certain855 characters, however, are governed by an electrical signal or signals of greater length than the dot or the dash, and these miscellaneous electrical signals having values or time constants greater than the dot or the dash will860 preferably control the language characters represented thereby through separate means from that previously described. The selection of these few characters may be accomplished in many ways, but the means shown herein865 will suffice for the purpose. The letter “L” and the cipher “0” are the only characters in common use in the Morse code that are represented by electrical signals of greater length than a dot or a dash, and the “L” and870 “O” types are mounted herein on a lever pivoted on the extended end of the shaft 21, so that the types will move in the same plane as those of the type-wheel 100. This lever is designated 115 and has in connection there with a ratchet-segment875 116, which coöperates with a stop pawl 117, spring-pressed, adjustable in position by an adjusting-screw 115, and releasable from the ratchet-wheel by an electromagnet 119. In this construction a spring 120 normally880 holds the lever 115 and its types “L” and “O” away from the printing-point, and the lever has two different movements, controlled, respectively, by the differential action of a compound solenoid 121, mounted on the end plate885 102 and having its coils so connected as to shift the first character on the lever 115 to the printing position when the electrical signal having a value or time constant next in order above that of the dash is received, while890 the second character on the lever 115 is brought to the printing-point when the signal component having the highest value in the Morse code is received. Half of the coils of the solenoid are energized, preferably, for the895 selection of the first of these two characters, and all of the coils when the second character is to be recorded.
The type-wheel 100 and the types on the lever 115 may be inked in any suitable 900man-