Patent GB-252737-A (GB)
Title: Improvements in apparatus for recording automatically morse or like signals in type printed characters
IPC: H04L15/34
Filed: 1926-05-28
Abstract: 252,737. PÚnot, R. E. M. May 28, 1925, [Convention date]. Addition to 208,554. Type-printing telegraphs.-The apparatus of the parent Specification is modified to enable each received signal to close a local circuit individual to the particular relay actuating the distributor spindle corresponding to the signal. Fig. 1 shows the devices for separating the dots and dashes and for delivering the required impulses to the distributor relays which progressively close the printing circuits of the corresponding characters. When the received dots and dashes are distinguished by duration (Morse code), the impulses traverse coils 27, 28, Fig. 3, of a relay to move a tongue 29 from contact 30 to contact 31, thus producing in a coil R marking currents of durations corresponding to the impulses separated by spacing currents in the opposite direction. The coil R constitutes as shown in Fig. 1 the energizing winding of a polarized electromagnetic device 7<1>, 8<1> provided with an armature 9 pivoted on a spindle 10. This armature carries a roller 11 driven by an electromotor, and an escapement member 21 co-operating with a wheel 20 provided with seven teeth. During a spacing interval the roller 11 bears on a disc 12 and rotates it frictionally against spring action, and during the receipt of a signal the roller 11 similarly rotates a disc 14. For a dash signal a conducting segment on a disc 18 on the shaft of the disc 14 contacts with a brush 19 to energize a magnet 13, while for a dot signal no corresponding contacts are closed. For an interval between letters a circuit is closed through a brush 16 and a conducting segment on a disc 15 on the shaft of the disc 12 to energize a magnet a. The shaft of the escapement wheel 20 carries a disc 22 with seven conducting segments and a ring 23a with seven supports, insulated from each other, for corresponding brushes co-operating with contacts 1 - - 7 on a fixed rim 23. The shaft is driven from the motor through a friction clutch and is released for one fourteenth of a revolution at each operation of the armature 9. A switch arm 24 engages under spring action a hole in the support of that brush which is in the initial position, and remains so engaged during the receipt of the impulses for a character, whereupon it is disengaged by the energizing of the magnet a. The contacts 1 - - 6 may be connected to corresponding spring blades 1<1> - - 6<1> carried by an insulating member 25 adapted to be rocked on its longitudinal axis against spring action by the energizing of the magnet 13 thus moving the blades from contacts 1 - - .6 to contacts -1 - - -6. The contacts 1 - - .6 close the circuits of the relays actuating the dot spindles, and the contacts -1 - - 6 the circuits of the relays actuating the dash spindles of the distributor. A circuit through the contact 7, the disc 22, and the blade 7<1> maintains the magnet 13 energized during the passage of the operative brush over a contact. Alternatively the contacts 1 - - 6 may be connected directly to the relays actuating the dot spindles, a second similar set of contacts being connected to the relays for the dash spindles, and the brushes being movable for co-operation with the second set by the energizing of the magnet 13. If the motor runs too fast the disc 18 closes through a brush 26 a speed-reducing circuit in the field of the motor. When the received dots and dashes are distinguished by polarity (recorder code), the impulses traverse coils 32 - - 35, Fig. 4, of two oppositely-polarized relays of which the tongues 36, 39, when no signals are being received, are in the position shown. On receipt of a dot signal the tongue 36 is moved, and the current through the coil R is thus reversed. On receipt of a dash signal the tongue 39 is moved, and the current through the coil R is in the same direction as for a dot, but the magnet 13 is also energized. The printer, Fig. 5, is similar to that of the parent Specification with the addition of means for printing numerals and punctuation marks which are arranged on the type wheel 79 alternately with the letters. Each of the sliding pins 89, 90, 91 - -, which co-operate with the radial arm 95A to stop the wheal 79 in position for printing, corresponds to one letter and to the immediately adjacent numeral &c. on the wheel, and, when the numeral &c. instead of the letter is to be printed, a spindle of the distributor is actuated to interpose a block 95D between the arm 95A and an adjacent arm 95B carrying a contact co-operating with a contact on an arm 95C rigid with the wheel 79 to close the printing circuit.