Patent GB-227150-A (GB)
Title: Method of telautographic transmission of handwriting and drawings by perforated strips or type-telegrams
IPC: H04N7/24
Filed: 1923-09-06
Abstract: 227,150. Korn, A. Sept. 6, 1923. Copying - telegraphs. - Consists in a method and apparatus for the telautographic transmission of handwriting and drawings. A copy of the handwriting is produced in a non-conducting material on a metal foil supported on a rotating cylinder 1 and connected electrically with one terminal 24 of a battery 23. A stylus 2 moves in a helical line over the cylinder as it rotates, and current impulses from the battery are caused to operate a system of polarized relays 18 - - 22 to produce a type telegram or a telegraphic perforated strip, from which the writing may be reconstructed at the receiving station. The apparatus comprises a rotary disc 3 of non-conducting material which has embedded on its surface contact plates or strips 4 - - 10, of which the strips 6 - - 10 are in electrical connection with the strip 4, one sector of the disc, approximately one-ninth its area, being left blank. A spring contact finger 11 bearing upon the strip 4 is connected to the stylus 2. When, after each rotation of the disc 3, the plate 5 bridges the ends of a series of spring contact fingers 12 - - 16 resting against the disc, the polarized relays 18 - - 22 are restored to the position of rest by current from the portion of the battery 23 between the terminals 25, 26. Each rotation of the disc 3 corresponds to the examination by the stylus of a small segment of the surface of the cylinder 1. As the disc rotates, the strip 4 passes under the finger 11 and the circuit through each of the relays 18 - - 22 in succession is made or not, according to whether the stylus is in contact with the foil or the non-conducting hand-writing when the strips 6 - - 10 sucnessively pass under their respective fingers 12 - - 16. The relays 18 -. - 22 remain in their adjusted position while the non-conducting sector of the disc 3 passes under the spring fingers 11 - - 17, and are used in this position to produce a registration, by operating punches or otherwise, corresponding to the special arrangement of the conducting and non-conducting portion of the cylinder surface traversed by the feeler 2 during the revolution of the disc 3. If it is desired to produce a registration by types, a rotary non-conducting disc 41, with contact plates 42 - - 46 arrangedas shown, is provided on the same shaft as the disc 3 to operate the polarized relays 36 - - 40 of the printing apparatus of a Siemens Rapid Telegraph. The sector of the disc 41 containing the plates 42 - - 46 passes under the contact spring 47 - - 51 when the blank sector of the disc 3 passes under the springs 11 - - 17. The relays 36 - - 40 are influenced by current from the left-hand portion of the battery 23, to correspond with the energized relays 18 - - 22 when the plates 45, 46 pass under springs 48. 50 bearing on the disc 41, and are available for printing of the corresponding type during the remainder of the rotation of the disc 41 until the plates 42, 43, 44 pass under the springs 47, 49, 50, 51, when current is passed through the relays from the right-hand portion of the battery 23 to bring them to a position of rest. Specification 197,402 is referred to.