Page:United States patent 1108529.pdf/19

 selecting components arranged about the axis of the shaft 92. These character-selecting components are preferably in the form of pins, most of which are fixed pins, such as 140, but some of which are shiftable into and out of the path of movement of the selector 118. The movable character-selecting components or pins are in this case two in number and are designated respectively 141 and 142. Both of these normally project into the interior of a drum 143, which I prefer to employ as a carrier for all of said character-selecting components or pins. The pin 141 is an ordinary dash pin representing the shortest dash in the Morse code and is normally in position to indicate the selection of a corresponding character-selecting component, but when retracted permits the main selector 118 to pass by it and strike the pin 142. In this manner the pin 141 when withdrawn controls the selection of a character-selecting component representing a dash of greater length than the ordinary dash of the Morse code and is controlled by such long dash when the long dash signal is received. In a similar manner the pin 142 when withdrawn permits the main selector to pass by it and be stopped against the next fixed pin in the same row, which represents the longest dash in the Morse code and is controlled by the longest signal received by the instrument. These tow pins are preferably operated by connections, such as 144 and 145, to a pair of angle-levers 146 and 147 secured to spindles 148 and 149 pivoted in blocks 150 beneath the base 113 of the synthetic mechanism. These angle-levers 146 and 147 are secured to the armatures 151 and 152 of a pair of electromagnets 153 and 154 which represent and are governed respectively by the two different long dashes or electrical signal components of the Morse code. The connections to these magnets for energizing the same will be herinafter described. The mode of the arranging the fixed and movable pins carried by the drum 143 is illustrated in, which will also be hereafter described, and most of these pins are omitted from the other views for the sake of clearness. These character-selecting components or pins just described are all supported by the drum 143 in such a manner as to project into the path of the main selector or finger 118 when they are in the plane of rotation of said finger, and all of said pins may in this case be of the same length. Both the dots and the ordinary dashes of a code system are represented by the pins carried by the drum 1`43, and the pins as a whole are divided into two main groups of six rows each, arranged in two overlapping sets the rows of which are equidistant from one another, the two main sets of six rows each being so combined as to form in the aggregate seven rows of pins, as will be clear by referring to. Each of these rows contains either dot or ordinary dash pins or both. In order that each of these two main sets may be brought into proper operative relation with the main selector 118 without varying the herinbefore described step-by-step feed movement of said selector, I provide means in this construction for shifting the drum 113 from a normal position, in which, in this case, the dot pins are in their proper positions and the dash pins are one period out of proper position, to another position in which the dash pin will be in proper position and the dot pins or components will be one step out of proper position. This movement is in this case lengthwise of the axis of rotation of the selector 118 and may be effected by means of a shifting-lever 155 having a pin 156 which works in a groove in a collar 157 forming in this instance part of the hub of the drum 143 and constituting with a sleeve 158 forming a continuation thereof, means for permitting said drum to slide freely on the shaft 92. The shifting movement of the drum 143 for bringing the dash components thereof into action is toward the left in, that is to say, it is in the direction of the feed of the main selector 118, this movement of the drum serving to bring the rows of dash components into the positions normally occupied by the rows of dot components. This will be clear by referring to the diagram in. The shifting-lever 155 has a long hub 159 mounted on a vertical stud 160 rising from the base 113 of the synthetic mechanism, and is secured in this case to the armature 161 of the electromagnet 162 which constitutes the means for selecting the dash components corresponding to dash signals received by the instrument.

In addition to the shift movement just described the drum 143 preferably has another shift movement to provide for the proper translation of code characters which, as in the Morse system, have extra spaces in the character. The drum 143 will therefore have two shift movements from its normal position, the second shift movement being preferably in the opposite direction to that just described, that is to say, it is in a direction of the reverse of the feed movement of the main selector 118. The extent of this second shift movement is the same as the first shift movement, that is to say, it is a movement of one step. The shifting-lever 155 constitutes a convenient means for also accomplishing this second shift movement, and in the construction shown said lever is connected to a second armature 163 which constitutes in this case the armature of the electromagnet 164 which represents the extra space which occurs in MOrse code characters. Each time that such a space is indi