Page:United States patent 1108529.pdf/14

 substantially constant speed, the switch and the driver being coupled in such a manner that the pull of the magnet will be effective to release the switch instantly from the driver when the magnet is energized, and the rotary driver being so combined with the switch as to begin to operate the latter immedately on the de&euml;nergization of the magnet. This will be better understood by referring to Figs. and, in which 21 represents the armature of the relay magnet 19, which magnet, as before stated, governs the operation of the first translating mechanism. This armature is secured in this case to one arm of an angle-lever 22 pivoted about the axis 23 of a rotary driver 24, which in this case is a worm-gear forming the terminal member of a train of worm gearing driven from a common driver 25, which will be rotated in one direction of a substantially constant speed by any suitable means, this driver being preferably the armature-shaft of a small electric motor 26, the direction of rotation of such armature shaft being indicated in {{spl2|1|Fig. 1|#S1} by an arrow. The initial member of the train of worm gearing operated by this main driver 25 is a worm 27 and the intermediate elements are a worm gear 28 in mesh with the worm 27, and the worm 29 in mesh with the worm gear 24. The object of this gearing is to reduce the speed of the main driver 25 to a very slow rotary movement of the worm gear 24 with which the angle-lever 22 directly coacts. The angle-arm or lever 22 constitutes one element of a switch the main member of which is a spring-arm 30, preferably insulated from the lever 22 and coacting with a contact 31 constituting a terminal of a circuit controlled by switch-arm 30. In this case the switch is adapted to he coupled to the worm-gear 24 by a frictional connection. Between this arm 22 and the worm gear 24 a frictional connection (not shown in detail) may be interposed for the purpose of coupling these parts together, or any other suitable means may be employed for effecting this result. The parts shown are the same as those illustrated in my prior application hereinbefore mentioned. This frictional connection should always be so adjusted as to permit the arm 22 to slip when the armature 21 is attracted by the relay magnet 19 and also when the long arm of the angle-lever 22 comes in contact with the stop 32. The worm great 24 travels slowly in the direction indicated by the arrow in and hence begins to return the armature 21, the lever 22 and the switch-arm 30 to their normal positions show in said view as soon as the relay magnet 19 is de&euml;ergized. This slow and regular return movement of these parts will be variable in extent, and the length of the movement will depend upon the length of the time-constant of the interruption of the signals received. If the break in the circuit is the vibratory interruption which separates successive electrical vibrations the parts 21, 22°and 30 will have only a partial stroke, and the switch-arm 30 will remain in engagement with the contact 31. If, however, the interruption is of longer duration, as for example, the interruption following a dot or a dash of the Morse or other telegraphic code, the parts 21, 22 and 30 will move a greater distance corresponding to the greater length of the time-constant of such break as compared with the time-constant of the vibratory interruption. Usually on the reception of a break following a dot or a dash the worm gear 24 will carry the parts 21, 22 and 30 with it until the long arm of lever 22 is in contact with the stop 32, by which time the contact-arm 30 will have moved away from the contact 31 and will have broken the local circuit.

The circuit or circuits controlled by the switch-arm 20 differ from the circuits before described for controlling said switch-arm in that they transmit electrical signals corresponding to but of different character from those traversing the circuits which include the sources of energy 4, 10, 13 and 20. The circuit controlled by tho switch-arm 30 and the contact 31 is in this case a simple one, including only a source of energy 33 and a suitable controlling device, such as the relay magnet 34. This circuit governs the operation of devices for properly receiving an incoming message, all of these devices preferably being embodied in and forming part of the receiving instrument proper which constitutes the second translating mechanism and is capable of converting the modified or continuous electrical signals into letters, figures and other characters of language substantially in the manner hereinbefore described and substantially as disclosed in my prior patent aforesaid. This second translating mechanism is preferably a recording translator. capable of printing on a record medium the characters of language into which signals are converted, and ever movement thereof is controlled in this construction by the relay magnet 34, said relay governing the operation of a circuit-controlling device, of any suitable type, for making and breaking the circuit of the second translating mechanism to represent continuous signal elements of the code characters of a telegraphic code. This circult-controller may be of any suitable type, and it is illustrated herein as the armature lever 35 of a sounder 26, this device having been used by me, in my early experiments, for this work, as a matter of convenience. This armature lever, when the relay magnet 34 is energized, closes the main break in the circuit of the second trans