Page:United States patent 1108529.pdf/18

the hub of said wheel in the well-known manner. By means of this pivoted connection the crown-wheel may be shifted back and forth on the shaft a sufficient 1010distance to release and reëngage the coacting arm 105. This shifting-lever will release said locking crown-wheel from the stop-arm 105 each time that the main synthetic magnet 106 is energized. The 1015shifting-lever 110 also has secured thereto a circuit-controlling arm 15 which engages a contact, 116 controlling a locking circuit which will be hereinafter described. The shaft 92 also carries a sleeve 117 which is 1020rotatable therewith and is also movable therealong a distance corresponding to the maximum number of periods or impulses in a code character. The longest characters of the Morse code contain six electrical signal 1025components or elements, and the sleeve 117 is in this machine shifted one step for each electrical impulse of a code character. The usual pin-and-slot connection may be employed, as shown in Fig. 2, for 1030permitting this step-by-step movement of the sleeve 117. This sleeve, in the present construction, carries the principal selector for choosing character-selecting components corresponding to the electrical signal 1035components of the signals which energize the main synthetic magnet 106. This main selector is here shown as a finger 118 secured to one end of the sleeve 117. The step-by-step movement of this selector and its sleeve 1040is effected by means of connections between them and the armature of the main synthetic magnet 106, which magnet at each energization thereof will operate means for imparting a movement to said sleeve and 1045selector, thereby shifting said selector to successive positions corresponding to the successive periods of a code character. The means shown herein for imparting this step-by-step movement to said main selector 1050is an escapement mechanism controlled by the shifting-lever 110. The main elements of this escapement mechanism are a rack-segment and a pair of feed-dogs, on of which is fixed and the other moveable, which 1055dogs coact with the rack-segment in a manner similar to the corresponding parts of the feed mechanism of a typewriting machine. The rack segment is designated 119 1060(see Fig. 10) and is secured to the free end of a shifting-lever 120 similar to that shown at 110, the lever 120 having a relatively long hub 121 which is supported on a base 122 (see Fig. 4). The free end of the 1065shifting-lever 120 is also forked and is provided with pins which enter a groove in a collar 128 at the end of the sleeve 117 opposite the main selector 118, this construction permitting shifting of the sleeve lengthwise of its axis in a well-known 1070manner while the selector is rotating. The rack segment 119 is secured to the extended under side of the forked end of the shifting lever 120, and each time that the main synthetic magnet, 106 is energized a feed movement of the rack-segment will be indicated.1075 The means for operating the dogs which coact with the rack-segment 119 are clearly shown in Figs. 2, 4 and 10. Here an angle-lever 124, which also has a relatively long sleeve, is mounted on a vertical stud i25,1080 the short arm of this angle-ever being bifurcated and embracing a pin 126 fixed to and depending from the shifting-lever 110. The long arm of said angle-lever has at its end a fixed feed-dog 127 and carries1085 a pivoted yielding feed-dog 127. (see also Fig. 11) which, when in its normal position1090 is in contact with a stop 129 in fixed relation with the fixed feed-dog 127. The movable feed-dog is returned to its normal position in the usual manner, a spring 130 being shown for this purpose. The feed-dogs and the rack segment are so organized that a feed movement is indicated each time the shifting-lever 110 is attracted on the 1095energization of the magnet 106, but the movement of the rack-segment, and of the sleeve 117 and the main selector 118 connected therewith. will not take place until said magnet is deërgized and the shifting-lever1100 110 has moved far enough on its return stroke to lock the stop-arm 105 and the crown-wheel together again. Any suitable source of power may be employed to effect this feed movement, a spring 131 1105connected to the shifting-lever 120 and to a fixed point being employed for this purpose. The shifting-lever 120 also carries for movement in unison therewith a circuit-controlling arm 132 which controls a1110 break in another controlling circuit herinafter to be described. At the end of a series of feed movements corresponding to the number of periods in the code character received, the rack-segment 119 should1115 be restored to its original position, and this is accomplished in the present construction by means of a restoring solenoid 133 the core of which is connected with said shifting-lever, the connector shown being a screw1120 134 having a journal portion at its lower end. The spring 131 is strong enough to shift the core 135 of the solenoid 133 each time that the rack-segment is moved a step, but the pull of the solenoid is of course1125 superior to that of said spring. In addition to governing the circuit-controlling arm 132 and a pair of insulating contacts 136 and 137 in the path of said arm, the shifting-lever 120 also controls a pair of 1130insulated contacts, such as 138 and 139, the function of which will be hereinafter described.

The main selector 118 coöperates in this construction with a plurality of 1135character-