"WIRELESS" INVENTIONS

Dominion, Volume 2, Issue 506, 13 May 1909, Page 7

"WIRELESS" INVENTIONS

« ■ ; "- :. TRANSMITTED WRITING. RECORDING ETHERGRA:MS IN.PRINT. (NT TILEUUAPU—I'UESp 'ASSOCIATION—-COPTKIOHT.J ! "'-'V I ; -"' r / . London, May 11. ; .Mr.' Hevland, a Norwegian, ; and Messrs.' Chalon and Chantelot, Frur.chmon,- have an-' noWed simultaneously inventions for recording ''otiergrams ' in' print and'transmitting band-writing. ' i ' TRANSMISSION OF PICTURES AND OF WRITING. . -. ■ with and Without: wlres. For some. time inventors have been transmitting photographs and writing over wires, but apparently the abovo inventions, enable the, transmission of • writing without wires. Apropos, it was claimed'last year by Mr. Hans Knudsen, a' Dane, that he could transmit, pictures'■by any, wireless, system,. Mr., Knudsen gave an exhibition last' September of typewriting by wireless telegraphy, concerning which "The Times" wrote: .• • Typewriting by Wireless. "A demonstration was given at the Hotel Cecil of an experimental apparatus constructed by Mr. Hans, Knudsen for. working the keyboard of a typewriter or a typesetting: machine from a 'distance by wireless teleCTaphy.- The sending arrangement consisted of a travelling carrier moving over a series of pins, each of which was connected with a key resembling that'-"of..a'piano., Each' of these-keys represented a. letter,, and, when it was pressed down, the corresponding pin rose up 60 that it came into contact with tho carrier as it passed. "In . this way, whenever the carrier passed over a pin connected with a depressed key, a circuit was closed and a group of electric waves sent out into space. At tho receiving end an exactly similar carrier was provided moving at the same rate-over a series of contacts corresponding with: the pins in- the transmitter, and each'of theso contacts was connected through a revolving coherer to a relay controlling a circuit that operated the appropriate key-'of a typewriter.. Hence,/the two carriers at the-two ends being always on corresponding letters, at any given moment an eleotric impulse sent by the transmitting carrier making contaot with any particular projecting pin operated tho circuitr-and that circuit onlyconnected with the corresponding Icey at tho receiving end; ■ ■ "For the apparatus to work, it is obvious that close synchronism must be maintained between tho movements of the two carriers. To this end. the. carriers are driven by two .electric, motors,, adjusted to run as nearly as'possible at the same speed; and, moreover, an electric impulse is used to start them both' simultaneously at the begining of the row of keys, both being stopped for an instant at the end of the row. The inventor has also adapted the apparatus to the transmission of pictures." The Telewriter.

; . An' apparatus called the telewriter for transmitting writing or sketches over wires was thus described some time ago by a London paper:— "By the aid of an 'electrical attachment called the telewriter, whioh can be fitted to any telephone, ono can,draw a-sketch or write a letter,, which is instantaneously reproduced a hundred .or more miles away. . "A'license has been obtained from the Post-master-General permitting the Telewriter Syndicate to instal 'telcwriting' offices throughout the country, and telegrams can be sent by the instruments direct to post, offices. It will thus be possible to go into a telephone call-box fitted with' a telewriter,' ring up the nearest post office, and write the telegram on the pad, w"hen the wire will be received, word for word at the post office and dispatched there in tho usual way. "The telewriter is a ,simplc-]ooking attachment, consisting chiefly of a pad.for writing, a roll of paper, and ftn electrio pencil. The -pencil is taken' from its. support, and with it any drawing or diagram can be made whilo conversing on tho telephone. An automatic -pen at the other end of'tho wire is released mechanically from tho support, and immediately moves over the paper : in a mannor corresponding exactly with that of the person drawing. So faithful is the reproduction that it is practically impossible to distinguish tho 'telephoned' writing from the originnl. "The convenience of the telewriter is obvious. : "When ordering some article by telephone which requires description a little sketch can bo drawn and discussed over tho telephone, whilo for Stock Exchange business, telephoning figures and so forth, the message. is sent in black and white and tho sender has his original copy. also for reference.. Telewriters havo already been tried experimentally in some of the largo London business houses, and have proved very satisfactory, but the. results have not before been published." ■