circuit is by way of conductors 300 and 302 to the switch-point 185, automatic switch 186, (this switch being operated by both switch arms 151 and 152, as before described and as 1135shown clearly in Figs. 1 and 3,) conductors 184, 308, and 198 to the electromagnet 74 and conductor 199 back to contact 167. This electromagnet 74, as before stated, controls the group-selecting operation and when thus 1140energized shifts the group-selector to a new group position. When an extra space occurs in a code character, as is frequently the case, an extra feed movement may be imparted to the group-selector by energizing the 1145electromagnet 74 a second time, this being done in the present case by providing a second contact 168, insulated from the contact 167, so that the brush 155 makes the circuit to said electromagnet twice when it is influenced by 1150a longer break than the ordinary one between dots and dashes. After each code character has been received and the corresponding language character printed a longer space is required, and it is made use of to control the 1155letter-spacing and printing functions of the apparatus. As the letter-spacing should take place after printing, the contact 169 preferably controls the printing-magnet 132, and the letter-spacing is controlled indirectly, it 1160being effected, as before described, by the platen, which on the energization of the printing-magnet 132 has its working stroke and simultaneously indicates the letter-space feed, but does not actually operate the feed 1165rolls until its return stroke. The circuit from the contact-brush 155 for controlling the printing operation is substantially the same as that just described, except that from the return-conductor 308 the current passes 1170by way of conductor 200 through the printing-electromagnet 132 and the contact 169.
Several other operations which it is desirable to effect at substantially the same time as the letter-space function may be governed 1175by a make-and-break wheel 201, moving in unison with and preferably secured to the shaft of the feed-roll 134. This make-and-break wheel has the same number of contacts and gaps or insulating-points as there are 1180teeth in the ratchet-wheel 135, mounted on said feed-roll, in order that the circuit controlled by said make-and-break wheel may be first made and then broken every time the feed-roll is turned one step to feed the paper 1185a distance representing the space between letters. The devices which are controlled by this make-and-break wheel are the electromagnet 110, governing the return of the type wheel to its zero position after the type has 1190been located and printed, the electromagnet 78, which releases the group-selector and permits it to return to its initial position after each code character has been received, and the electromagnet 119, which releases the 1195holding-pawl 117 and permits the lever 115 to return to its normal position after each operation thereof to bring one of the miscellaneous characters represented by the longest two electrical signals to the printing position. All three of these electromagnets are preferably1200 connected in parallel in a circuit which is normally open and which passes from the battery 189 through conductors 300 and 302, switch-point 185, automatic switch 186, conductors 184, 308, and 304 to said three 1205electromagnets 110, 78, and 119, connected in parallel, the opposite sides of these electromagnets being connected to the contact-arm 203 of the make-and-break device, which is normally opposite a gap or insulating-point1210 of the wheel 201. The hub of this wheel is connected by a conductor 305 to conductors 307, 306, and 301, through which the circuit is completed. It will be evident that all of the three electromagnets just described will1215 be operated simultaneously at each turning of the make-and-break wheel 201.
A longer space than any of those before described is necessary for the space between words, and this word-space is represented by1220 the contact 170. When a space of this length occurs in a telegraphic message, the brush 155 reaches the contact 170 and closes a circuit which is substantially the same as those before described with respect to the 1225electromagnets 74 and 132, except that from the return-conductor 308 the current passes through a conductor 205 and the electromagnet 144, before described, to said contact 170. This electromagnet 144 indicates a greater feed1230 than that indicated by the magnet 132, (preferably a feed twice as great,) and the actual movement of the feed-roll 134 is accomplished by the spring 142. At the same time the make-and-break wheel 201 is turned and causes1235 the energization of electromagnets 110, 78, and 119 and the operation of the parts controlled thereby; but these are merely additional operations assuring the return of the type-wheel, the group-selector, and the lever1240 115 to their normal positions and do not interfere with the movements of any of the other parts. Should the switch 151 travel onto the contact 171, it will break the motor circuit in the manner before described by1245 short-circuiting the armature and raising the arm of the automatic switch 186.
In addition to the devices hereinbefore described I prefer to employ suitable means for governing the operation of the motor, so as1250 to maintain a uniform speed of rotation of its armature. This I accomplish in the present case by providing a regulator which operates substantially on the principle of a mechanical governor and also by employing1255 in connection therewith a regulating-switch governed by the operation of said mechanical regulator. The governor or mechanical regulator may be of any suitable construction, but consists in this case of a plurality of 1260re-
