Patent GB-191504378-A (GB)
Title: Telegraphic Printing Apparatus.
Inventor: RODRIGUEZ MATIAS BALSERA
IPC: H04L25/49
Filed: 1915-03-20
Abstract: 4378. Rodriguez, M. B. March 20. Type-printing telegraphs; synchronous movements.-In a type-printing system of the kind in which the type-wheel is continuously rotated, a single electromagnetically-controlled lever performs the printing and tape-feeding operations and connects the line for discharge, while the printing of the character is performed both at the traosmitting and d receiving stations, the instruments of which are synchronized, if necessary, once for each revolution of the apparatus. Printing, tapefeed - ing, and line-discharge apparatus. A lever 31 provided at one end with an escapement pawl 33 carries a lever 39, on which is mounted an impression roller 40, and which is pressed into contact with the lever 31 by an adjustable spring 42. The pawl 33 engages an escapement wheel 34, on the spindle of which is mounted a feed-roller 35, between which and the spring-pressed lever 37 the tape 36 passes. Above the roller 40, the type-wheel 14 is journaled and is engaged by an inking-roller 30. The lever 31 carries also two insulated spring contacts 44, 49 adapted to engage, in the normal position of lever 31, contacts 45, 50 respectively, and a third insulated spring contact 47 which engages a contact 48 when the lever 31 is in its operative position when the contacts 44, 49 engage the contacts 46, 51 respectively. The lever 31 is held in its inoperative position against the action of a spring by means of a polarized relay 52. Synchronizing. If the arm 8 of the synchronizing impulse-sending distributor lags behind the arm 8 of the distributor provided with the synchronizing-apparatus, the second arm is held by the arm 10 and lever 11 until the first arm reaches a contact connected to a source of electromotive force when a current passes through a circuit consisting of the brush 18, arm 8, and a circuit (not shown but similar to that shown in Fig. 2) comprising a lead a, contact 59<2>, switch 60<2>, lead b, contact 45, and switch 44, to line, and thence to the switch 44 of the second apparatus shown in Fig. 2, contact 45, lead b, switch 60<2>, contact 59<2>, lead a, arm 8, brush 18, contact 57, lead c, winding 56 of a polarized relay R, lead d, contact 57<2>, switch 58<3>, lead e, to earth. The operation of the switch 59 by the relay R breaks the circuit of the magnet 62 and completes the circuit of the magnet 13 in the circuit of a local battery 66 and the contacts 28, 58, thereby energizing the magnet 13 to withdraw the lever 11 from the path of the arm 10. The de-energization of the magnet 62 at the contact 60 allows the switch 60<2> to connect the line to earth or to a source of negative potential through a hand switch 65, while the opening of the switch 58<2> breaks the circuit of the relay winding 56. The operation of the lever 11 closes the circuit of the resetting-winding 68 of the relay R at the contact 67 when the switch 59 operates to energize the magnet 62 again, to restore the switches 58<2>, 60<2> to their former positions, The other end of the line is connected to earth or to a source of negative potential as the arm 8 passes over a contact. Printing, tape-feeding, and line-discharge operations. When a character-key 29 of the transmitting - apparatus is depressed, its contact 15 is connected to a source of potential by means of a contact 56<2>, Fig. 2, and a switch arm 54, so that when the brush 18 passes over this energized contact, a current is sent through the arm 8, lead a, contact 59<2>, switch 60<2>, lead b, contact 45, and switch 44 to line and thence to the switch 44, contact 45, lead b, switch 60<2>, contact 59<2>, lead a, arm 8, corresponding contact 15 of the receiving apparatus, leadf, arm 54, contact 55, winding 56 of the polarized relay R, lead d, contact 57<2>, switch 58<2> to earth. The operation of the switch 59 by the relay R breaks the circuit of the magnet 62 and completes the circuit of the battery 66 through the contact 28, brushes 22, 21, contact 17, lead m, contact 50, switch 49, polarized magnet 52, to earth. The deenergization of the magnet 62 at the contact 60 breaks the circuit of the winding 56 at the contact 57<2>, while the energizing of the magnet 52 allows the lever 31 to be raised to perform the printing operation and to connect the line to earth or to a source of negative potential through the switch 44, contact 46, and switch 53. The operation of the lever 31 also causes a winding 68 on the relay R to be connected to a source of positive potential through the switch 47 and contact 48, thereby restoring the switch 59 to its normal position at the contact 60. The lever 31 is restored to its lower position to feed the tape, by means of the escapement pawl 33, by causing the upward movement of the lever to connect the magnet 52 to a source of negative potential through a contact 51 and switch 49. The printing, tape-feeding, and line-discharge operations at the transmitting-station are effected when the arm 8 at that station moves slightly forward on to the contact 16 corresponding to the live contact 15, whereupon a circuit comprising the brushes 19, 21, lead m, contact 50, switch 49, and magnet 52 will be established to operate the lever 31.