Patent GB-191204584-A (GB)
Title: Page Printing Telegraph Receivers.
Inventor: ETIENNE PAUL
IPC: H04L19/00
Filed: 1912-02-23
Granted: 1912-10-31
Abstract: 4584. Etienne, P. Feb. 24, 1911, [Convention date]. Eletric type-wheel actions.-In a page-printing telegraph receiving-apparatus in which each letter is selected by means of a definite number of current alternations, the alternations of current are received by a magnet 39, which, by oscillating its armature 36, causes an arm 38 to actuate a two-armed escapement 34, thus permitting a motor to drive a wheel 28 and a shaft 3, with which the type-wheel 16 rotates. The apparatus may in some cases be provided with a motor arrangement of the following character : A spring box 134, Fig. 12, stores up the power given by the motor to the shaft 133, and supplies it to the wheel 29 driving the telegraph instrument when required. The box 134 on rotating carries with it a sleeve 154, which, by means of a pin 154, rotates a switch arm 158. Fig. 14, until its hook 158<a> engages with the spring 166, thus completing the circuit of the motor. The motor then drives the shaft 133. and a pin on the shaft engages in a slot 152<a> in a sleeve 153 and moves the sleeve forward to bring its teeth 153<a> into engagement with teeth on the switch arm 158, thus moving the switch arm back. The hook 158<a> engages with the catch 162. and the motor current is kept closed until the arm 158 is released from this catch. Platen-impression arrangements.-The magnet 39 has a second armature 40 which is held attracted while the impulses are being received. thus causing the hook 66" to engage with the catch 73, and when the armature moves back, the hook 66<a> carries the arm 69 with it and contact is momentarily closed between the plates 70, 71 before the hook is released from the catch. This contact closes the circuit of the magnet 63, which moves the arms 53, 54, to cause the platen to strike the type wheel. Letter-spacing mechanism.-On returning, the arm 53 strikes the arm 50, Fig. 2, which rotates the arm 48 on the axle 49 and thus causes the arm 47 on the same axis to push against the rod 13, Figs. 1 and 6. A rack 12 is let into a radial slot in the shaft 3 and the rod 13 moves forward the rack 12, which by means of the detent 18, carries with it the type-wheel 16 and its associated parts. A second detent 19 engages in a rack 11 in the shaft 3, and prevents the return of the typewheel when the rack 12 returns. The typewheel is thus moved on one letter-space. The movement of the rack 12 to the right also causes the arm 6 to disengage the arm 4 on the shaft 3 from the ratchet-wheel 29 which drives it, thus allowing the shaft to return under spring action to a zero position. In order to return the carriage to the left in Fig. 1, a very small number of impulses is sent, thus rotating the type-wheel 16 a short distance only and not disengaging the pin 76 from the finger 77. When now the platen arms 53, 54 are moved, the arm 81<a> which is pivoted with the finger 77, depresses the rear end of the detents 18, 19 and releases the typewheel from the shaft 3. The arm 4, Fig. 4, is arranged to brush against the extension 4<d> of the armature 36 at each printing operation to ensure the armature being placed in position to be actuated by the first positive impulse of the succeeding series of alternations. The printing-lever may be actuated by spring power means which is released by the armature 40. Line-spacing mechanism. When the typewheel carriage 20 strikes against the buffer 85, the arm 86 is rotated and depresses the lever 91, Figs. 1 and 3. The lever 91 is connected by the rod 92 to the arm 93, and the rotation of the lever 91 causes the tooth 96 to feed the wheel 60 on one step. The paper passes from the roll 59 over the platen 57 to the wheel 60. Ink-ribbon mechanism.-(1) Feed and automatic reversal. Each time the carriage 20 returns to the left and rotates the arm 86, this arm is caused to depress the lever 118, Fig. 2, thus moving the plate 110 in its guides and causing the detents 114<b> to rotate the wind-on roller 100. When the roller 101 is empty the clasp 107 near the end of the ribbon strikes the arm 114 and rotates it beyond the mid-position so that the spring 116, Fig. 3, attached to the extension 114<a>, pulls it over into engagement with the wheel 103. The moving of the plate 110 now rewinds the ribbon on to the roll 101. (2) Vibrator mechanism. The ribbon-carrier is mounted on parallel links which are moved forward by the platen-operating arms so that the ribbon rests over the writing only while the printing is taking place.