This instrument is a folding arm protractor. It is used for measuring angles on the vertical and horizontal planes. The two folding arms have small metal support springs where they are attached to provide support and the other ends have pins with which to mark particular points. A screw mechanism on the rim allows fine tuning of plotting. Chadburn, Brothers were fine instrument makers of Sheffield making optical and nautical instruments during the 19th century. This item was donated by a local resident whose grandfather Carl Spence was a bridge builder who worked on the Warrnambool Breakwater extension c 1919. This item has scientific significance which is possibly linked via the owner to one of Warrnambool's most well known landmarks.Brass, circular instrument with fold out sections which are hinged and a movable section. The circular part is marked in degrees around the circle. Notches on inner rim at 90 degrees intervals. Chadburn ,Brothers Sheffield. Graduated scale measuring 360 degrees.warrnambool, warrnambool breakwater

The ship’s telegraph section was once part of the navigational equipment of the famous paddle steamer, PS Hygeia, and was later installed on Flagstaff Hill’s exhibit, the steamer Rowitta. This is the Bridge Section of a ship’s telegraph, a Duplex Gong model, made by Chadburn & Son of Liverpool. The gong sounded two signals whenever the navigational commands to change the speed or direction were given by the ship’s pilot. Communication between the ship’s pilot and the engine room in the late 19th to the mid-20th centuries was made with a system called an Engine Order Telegraph (E.O.T.) or ship’s telegraph. The equipment has two parts, the Bridge Section and the Engine Room Section. The Bridge Section was usually mounted onto a pedestal, and the Engine Room Section was attached to a vertical surface. The standard marine commands were printed or stamped around the face of the dial and indicated by a pointer or arrow that was usually moved by a rotating brass section or handle. The ship’s pilot stationed on the Bridge of a vessel sends his Orders for speed and direction to the Engine Room with the E.O.T. He moves the lever or levers, depending on the number of engines the ship has, to change the indicator on the Bridge Section’s dial to point in the new direction and speed of travel. This change causes the Orders to be duplicated on the Engine Room Section’s dial and a bell or bells to signal the change at the same time. The engineer then adjusts the ship’s engines and steering equipment to follow the pilot’s Order. CHADBURN & SON, Liverpool- Chadburn Brothers, William and C.H., were joint inventors and well-established makers of optical and scientific instruments and marine gauges. The firm was granted the Prince Albert Royal Warrant in the late 19th century. In 1870, William Chadburn applied for a patent for his navigational communication device for use on ships. By 1875, Chadburn & Son was producing the brass Engine Order Telegraph in its plant at 71 Lord Street, Liverpool. In 1911, the ship, RMS Titanic, was launched, fitted with Chadburn & Sons E.O.T. The Chadburn Ship Telegraph Company Limited was registered in 1898 to take over Chadburn & Sons. In 1903, a large factory at Bootle, near Liverpool, and its products were being sold overseas. In 1920, electric-powered telegraphs were developed. In 1944, the name changed to Chadburn’s (Liverpool) Limited. In 1968, the company became Chadburn Bloctube Ltd. In 2000, the company, now Bloctube Marine Limited, was still manufacturing ship telegraphs. The P.S. HYGEIA 1890-1932: - This ship’s telegraph was installed on the new paddle steamer, PS Hygeia, one of three iconic pleasure steamers famous for providing regular services in Port Phillip Bay, Victoria, to thousands of passengers between the ports of Queenscliff, Sorrento, Portsea, Dromana, Rosebud, Rye, and Mornington. It joined the Ozone and the Weeroona, all three described as being glamorous, powerful and fast. Its ticket office was on the pier itself. The P.S. Hygeia was built in Yorker, Scotland, in 1890, by Napier, Sharks & Bell. It was registered in Melbourne, Australia, by Hubbart, Parker & Co. in 1891. The steel ship was 92 metres long, able to travel at 22 knots, and licensed to carry over 1600 passengers in luxury, with even a barber shop on board. The regular service between the ports in Port Phillip Bay, Victoria, continued for over 40 years. With the decline in passenger demand, the service wound down. The Hygeia was sold to H.M. Morris in 1931 for demolition and breaking up. Equipment, fittings, and even lifebuoys were sold, with many items purchased by people who had some connection to the Hygeia. On August 25th, 1931, what was left of the vessel departed Port Melbourne and eventually, in June 1932, it was laid to rest at the ships’ graveyard outside Port Phillip Heads. The SS ROWITTA 1909-2015: - The ship’s telegraph was originally installed on the PS Hygeia. It was purchased when the Hygeia was broken up in 1931 and later installed, in 1975, on Flagstaff Hill’s SS Rowitta, an exhibit greatly enjoyed by the public until it was demolished in 2015. The ferry “SS Rowitta” was built in 1909 in Hobart, Tasmania. The timber steam ferry was built using planks of Huon and Karri wood. It was a favourite with sightseeing passengers steaming along Tasmania’s Tamar and Derwent rivers for 30 years. Rowitta was also known as Tarkarri and Sorrento and had worked as a coastal trading vessel between Devonport and Melbourne, and Melbourne, Queenscliff and Sorrento. The vessel had given over 100 years of service and pleasure. This Bridge section of a ship’s Engine Order Telegraph, used with an Engine Room section, represents late-19th-century change and progress in communication and navigation at sea. This type of equipment was still in use in the mid-20th century. It is significant for its association with its maker, Chadburn & Son, of Liverpool, a well-known marine instrument maker whose work was recognised by English Royalty, and whose products were selected to supply similar equipment for use on the RMS Titanic. The ship’s telegraph is also significant for its association with the paddle steamer PS Hygeia, one of three iconic steamers that transported thousands of passengers from port to port within Port Phillip Bay, Victoria, for over 40 years from the 1890s to the 1930s. Queenscliff Borough remembers the Hygeia by naming a road near the pier Hygeia Drive. The Hygeia is registered on the Victorian Heritage Database as a vessel of significance, VHR S329. In 1901, Hygeia had the privilege of carrying their Royal Highnesses, the Duke and Duchess of York, from Mornington to St Kilda Pier, Melbourne, during their Royal visit celebrating the Federation of Australia. The ship’s telegraph is also important for its connection with the Rowitta, a large exhibit on display at Flagstaff Hill Maritime Village, aiding maritime education for over 40 years. It represented the importance of coastal traders to transport, trade and communication along the coast of Victoria, and before the availability of rail and motor vehicles, serving many roles. Bridge section of a Ship’s Telegraph or Engine Order Telegraph (E.O.T.). The round, double-sided, painted glass dial is inside a brass case behind glass. It is fitted onto an outward tapering brass pedestal with a round base. The brass indicator arrows between the handles point simultaneously to both sides of the dial when moved. An oval brass maker’s plate is attached to the top of the case. The dial’s faces have inscriptions that indicate speed and direction, and the front face and plate include the maker’s details. A serial number is stamped on the collar where the dial is fitted to the pedestal. The ship’s telegraph is a Duplex Gong model, made by Chadburn & Son of Liverpool. It was originally part of the navigational fittings on the paddle steamer, PS Hygeia.Dial, maker’s details: “PATENT “DUPLEX GONG” TELEGRAPH / CHADBURN & SON / TELEGRAPH WORKS / PATENTEES & MANUFACTURERS / 11 WATERLOO ROAD / LIVERPOOL” LONDON / 105 FENCHURCH STREET” “NEWCASTLE / 85 QUAY + SIDE” “GLASGOW / 69 ANDERSON QUAY” “PATENT” Dial instructions: “FULL / HALF/ SLOW / FINISHED WITH ENGINES / STOP STAND BY / SLOW / HALF / FULL / ASTERN / AHEAD” Maker’s plate: “CHADBURN / & SON / PATENT / LIVERPOOL” Serial number: “22073”flagstaff hill, warrnambool, maritime village, maritime museum, shipwreck coast, great ocean road, engine order telegraph, e.o.t., navigational instrument, communication device, ship’s telegraph, engine room section, bridge section, rms titanic, chadburn & son, chadburn brothers, william chadburn, chadburn ship telegraph company, chadburns, duplex gong, liverpool, ss rowitta, navigation, marine technology, pilot’s orders, steam power, hobart, tasmania, devonport, tasmanian-built, ferry, steam ferry, steamer, 1909, early 20th century vessel, passenger vessel, tamar trading company, launceston, george town, sorrento, tarkarri, speculant, peter mcgennan, p j mcgennan & co. port phillip ferries pty ltd, melbourne, coastal trader, timber steamer, huon, karri, freighter, supply ship, charter ferry, floating restaurant, prawn boat, lakes entrance, ps hygeia, paddle steamer, pleasure steamer, port phillip bay, queenscliff, portsea, dromana, rosebud, rye, mornington, hubbart parker & co, 1890, 1903, h.m. morris, hygeia