Framed Prints
Framed Print of Telegraph diagram and reading-plate of Sir F. Ronald's electric telegraph, 1870. Creator: Unknown
Telegraph diagram and reading-plate of Sir F. Ronald's electric telegraph, 1870. Diagrams of...the instrument contrived by Mr. Francis Ronalds, in 1816, for transmitting messages by the electric telegraph which he constructed, with a length of eight miles of wire, in his garden at Hammersmith. Hence it is evident, says the inventor, that when the wire was charged by the machine at either end the electrometers at both ends diverged; when it was discharged suddenly at either station they both collapsed at the same instant; and if it was discharged at the moment when a given letter, figure, and sign on the lower plate (fig. 3) of one clock, appeared in view through the aperture, the same figure, letter, and sign appeared also in view at the other clock, so that, by such discharges of the wire at one station, and by noting down the letters, figures, or signs in view at the other, any required words could be spelt, or figures transmitted'...In the memoir of Sir Francis Ronalds...[elsewhere in this journal], allusion is made to the supercilious rejection of his electric telegraph by the Lords of the Admiralty, twenty years before the date of Messrs. Cook and Wheatstone's patent'. From Illustrated London News, 1870. Heritage Images features heritage image collections. © The Print Collector/Heritage Images
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Media ID 39244319
Apparatus Clock Communication Diagram Electric Electric Telegraphy Electrical Electricity Engineering Invention Mechanism Prototype Telecommunication Telecommunications Telegraph Telegraphy Time Timepiece Wire
Modern Frame 14"x12" (36x31cm)
Ready to Hang Contemporary Framed Prints adds style, protection, and a polished touch to your space - effortlessly.
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Wood effect frame, card mounted, 10x8 fade resistant photo print. Overall outside dimensions 14x12 inches (36x31cm). Environmentally and ozone friendly, 40mm wide x 15mm Polycore® moulding has the look of real wood, is durable and light and easy to hang. Biodegradable and made with non-chlorinated gases (no toxic fumes) it is efficient; producing 100 tons of polystyrene can save 300 tons of trees! Prints are glazed with lightweight, shatterproof, optical clarity acrylic (providing the same general protection from the environment as glass). The back is stapled hardboard with a sawtooth hanger attached. Note: measurements provided are estimated outer dimensions, which include both the image and the frame. While we aim to keep sizing consistent, exact dimensions may vary slightly due to differences in print size or production requirements, which may result in a variation in the overall size (up to approximately 2.5cm (1"))
These are individually made so all sizes are approximate
Estimated Image Size (if not cropped) is 19.3cm x 21.9cm (7.6" x 8.6")
Estimated Product Size is 31cm x 36cm (12.2" x 14.2")
