Patent GB-190428268-A (GB)
Title: Improvements in and relating to Telegraph Transmitting Instruments.
Inventor: HIGGINS FREDERICK HERBERT WILL
Filed: 1904-12-23
Granted: 1906-03-22
Abstract: 28,268. Higgins, F. H. W. Dec. 23. Telegrapha.-Relates to automatic transmitting- apparatus particularly with reference to type-printing receivers. A tape is employed with wire perforations transverse to the tape, enabling thirty-six combinations two at a time to be made. The apparatus comprises, (1) a keyboard, (2) a perforating-device, and (3) a circuit-closing device, and in connection with this latter is described a transmitter involving two synchronously-running wheels. Fig. 1 is a diagram of the keyboard showing thirty keys, under which lie nine bars capable of being moved longitudinally through bell-crank levers by the depression of a key. It will be seen that each key causes the movement of a pair of the bars f, some of which for convenience move to the left while the rest move to the right, and by so doing make contact with two terminals i. The bars f are returned by springs when the keys are released. The perforator is shown in Fig. 9, in which are shown eleven punches, the two outside ones producing holes for feeding purposes, so that four holes are perforated simultaneously. Each punch is operated by the armature of an electromagnet energized from the keyboard. Six of the punches in the Figure are shown completely surrounded by spiral returning-springs, the others are also returned by spiral springs which, however, act on the pins 8 to save space. When the arm 20, which depressed the punch, returns, it causes the rotation of the lower paper-roller 9 by means of the spring pawl 23 and ratchet-wheel 19. Although these punches have been described as in a line transverse to the strip, they may be arranged in a "staggered" form. A combined form of keyboard and perforator is shown in Fig. 14, in which a rod 26 slides so as to place its end 30, which is flexibly mounted, between the punch head 7 and the armature bar 29. After perforation the tape is transferred to the circuit maker, of which Fig. 20 shows a vertical section. The lever 60 is operated, causing the rnds 43 to be raised together with the upper feed-roller 51. The tape is then inserted below the rods 43 and between the feedrolls with the guide perforations on the edges of the tape interme-hing with the teeth of the lower feed-roll. The lever 60 is released and the spring 64 causes the rollers to grip the tape, while the rods 43 are preyed lightly on the upper surface of the tape. When a signal is beneath the rods two of them will descend, tilting the levers 78, Fig. 18, resting on the rods so as to make contacts with two spring contacts 84. After the operation of printing a letter at the receiver, a momentary impulse is communicated to a pair of electromagnets which cause the rotation of the feed-rolls. The two connections thus made may be made to operate a suitable transmitter. In one type of transmitter the two connections occur between two of the terminals 86 and the two opposite terminals 84, Fig. 31, and these latter are led direct to terminals 138 on the transmitter, and thence to the segments 111 on the circumference of a wheel, the method of connection being that shown in Fig. 31. Five segments 120 of different lengths form an inner ring and are joined to the first five terminals 138, so that the rotating arm 123, 121 can make connection between every pair of terminals 138 once and once only during each revolution. Fig. 25 shows a detail section of the instrument showing slip rings 124, 125, and 126, which are connected to the arms 121, 122, and 123, respectively. The pawl 99 and ratchet-wheel 100 rotate the shaft 92 and the wheel 100, with which the receiving typewheel runs in synchronism. When the circuits have been completed in the above manner, a current passes by means of the slip rings through an electromagnet 113 and causes the stoppage of the crown-wheel 110 and the wheel 100 by the detent 107. The stoppage of the latter instantly stops the wheel at the receiving-station and the continued rotation of the shaft 92, due to the friction pad 136, causes the contacts 135, 137 to be connected and supply the necessary impulse to operate the platen at the receiving-station. Reference is made to Specification No. 12,215, A.D. 1884.