The McKesson Nargraf machine is affixed to a four-legged metal stand with castors. The head of the machine has two reduced pressure gauges on top: one each for oxygen and nitrous oxide. Below each pressure gauge is a cylindrical drum, where the green-painted faces are directed outwards. There is a pressure control valve with a dial on top of the machine between the two pressure gauges, and a large mixing valve in the centre of the machine head that regulates the proportions of oxygen and nitrous oxide. In front of the mixing valve is a glass cylinder with fabric threads hanging down from the top surface inside.anaesthesia, oxygen, nitrous oxide

This model was found in the collection of Bay Steamers Maritime Museum. It is not knowt who created it but it is supposed that it was constructed to educate the many masters of the Wattle in the operation of a steam engine - a not so common mode of power these days. A Bay Steamers Maritime Museum examined the model in March 2012 and discovered that is was in poor repair. Using his existing knowledge, and with reference to some historic texts, he made some repairs and returned the model to working order. Here is his anaylsis of the situation as an excerpt from the Bay Steamers Maritime Museum newsletter Steamlines May 2012 "I was confronted with a model of a steam engine used years ago as a training aid for hopeful steam engineers. Already having a knowledge of steam operations, I considered a museum write-up for that model a ‘piece of cake’. However, on turning the model’s crankshaft, the valve timing seemed ‘out of kilter’ with the movement of the piston. Problem was that the two eccentrics on the crankshaft were not properly secured to it. Eventually I fastened the two eccentrics to the crankshaft where I felt that they should be and then realized that one of them had a chain-driven valve-timing device attached. This would be adjusted while an engine was running to achieve best performance and fuel economy whilst in operation by accurately controlling the period of time during which steam under pressure from the boiler would be admitted to the cylinder and give greater time for the steam to expand in the cylinder, move the piston and turn the crankshaft and thus, drive the attached apparatus. When the valves were correctly set up it was then possible to get the model to function properly.The model comprises a green section, which is the actual the model mounted on a brown painted board. There are two parts of the model, painted white representing the steam passages, and black representing the cast- iron portions of the cylinder-block casting, and of the main valve sliding between the cylinder a second sliding valve. Of the black portions, one slides back and forth being connected to a rod which is connected to an eccentric clamped to the crankshaft and is the nearer to the flywheel of two eccentrics. This eccentric is attached to the crankshaft at an angle of 90 degrees to the crank-pin attached to the flywheel. To operate the model simply turn the flywheel by means of the handle attached to its crank-pin. A second eccentric is also attached to the crankshaft, further away from the first eccentric, and it is adjusted to operate 90 degrees from the first eccentric (that is, 180 degrees from the crank-pin) A piston (painted silver) is located in a plastic cylinder and has a piston rod which passes through one end of the cylinder, (in actual practice a steam-proof gland seals the cylinder against loss of steam) terminating in a cross-head slide between four rails guiding it. From this cross-head, a connecting rod joins the piston-rod to the flywheel via the crank-pin attached to the flywheel which is part of the crankshaft. (In actual practice, a flywheel may not be used, particularly in a multi-cylinder engine.) The white portions of the model painted nearest to the cylinder represent the two steam ports cast into the main cylinder block, whilst one section painted in between those two represents the exhaust outlet (which may be connected to a condenser to conserve water, or to the open air). The main slide valve has three white-painted portions painted thereon. It has two white-painted marks representing the steam passages to the steam ports into the cylinder, and a third section in between the other two, being that part of the valve through which exhaust steam passes in line with the ports in the cylinder block. By rotating the flywheel, the operations of an engine will be observed as steam is admitted to the main valve via the gap between the two jaws of two moveable portions of a second sliding valve which is operated by the second eccentric attached to the crank-shaft. This eccentric is used to finely tune the valve timing of this model to obtain best running results of an engine. There are various methods used for reversing a steam engine. model compound steam engine, steam engine, model, crankshaft, valve, flywheel, wattle, engineer, eccentrics

In 1913, Mark Cowley Lidwill designed a machine for the purpose of mechanical or insufflation anaesthesia. The Lidwill machine was a portable machine weighing 7kg that could easily be packed into two small bags. The machine involved compressed air being delivered to an ether vaporiser. An ether/air control device allowed varying concentrations of ether to be delivered. The ether vaporiser could be immersed in hot water to prevent cooling and the ether temperature was measured. From the vaporiser, the ether/air mixture went through a trap bottle, then to a crude mercury blow-off valve and subsequently to the patient.Large leather suitcase style bag divided into two levels containing and insufflation anaesthesia machine.insufflation, mark cowley lidwill, thoracic surgery, positive pressure

This Tangye B-size, single-cylinder, horizontal steam engine was likely manufactured in England around the mid-1880s. It was distributed by Melbourne machinery merchants Cameron & Sutherland, which also operated in Bendigo and Ballarat. A local cheese maker once used the engine to drive factory equipment. It was later donated to the Warrnambool Technical School, which then donated it to Flagstaff Hill to add to its historical steam engine collection. Between its manufacture and its donation to Flagstaff Hill, the governor had been replaced by the current Pickering governor. This engine design was very popular in the late 19th and early 20th centuries. When connected and powered up, the engine could drive an overhead line shaft via a flat belt off its flywheel. The line shaft would then drive the machinery via flat belts. It could drive virtually any type of machinery, such as water and sewerage pumps, mine elevators, winches, cranes, metal forges, air blowers, and marine machinery. This engine features a mechanical governor, which controls the speed of the engine regardless of whether it is under load. It also has a water pump built into the valve rod, which is used to supply the boiler with water. Steam enters the cylinder via a slide valve and applies pressure to the piston; it is like a modern internal combustion engine, but in the case of the steam engine, the pressure is exerted in turn on either side of the piston. In other words, the connecting rod is pushed by steam via the piston and piston rod and then pulled back again by steam pushing on the opposite side of the piston. Thus, power is exerted almost continuously, except at the end of each piston stroke, when it reverses direction. In the 1880s, many local butter and cheese manufacturers installed Tangye steam engines to power their machinery. A comprehensive article in the Gippsland Mercury in September 1889 extolled the magnificence of the Farnham Butter Factory in Dennington, Warrnambool, and described how one Tangye engine was used to drive several machines in the cheese- and butter-making processes. A report in the Warragul Guardian in December 1890 notes that the newly opened Warrnambool Butter Factory used a Tangye steam engine to pump water from a 60-foot well. Tangye: Richard Tangye (1833–1906) and four of his brothers—James, Joseph, Edward, and George—were the sons of Joseph Tangye, a Quaker Cornish miner. In 1857, they founded the engineering firm Richard Tangye & Brothers in Birmingham, UK. In 1860, the firm became Tangye Brothers and moved to Cornwall Works in Birmingham. The business encouraged inventors to join the company and develop their patents there, as happened with Weston’s differential pulley block, invented by the Englishman Thomas Aldridge Weston in 1854. Tangye bought the patent in 1858, giving the firm the sole right to manufacture it. The design received a medal for “original application, practical utility and success” at the 1862 International Exhibition in London. Also in 1858, the Tangye firm was commissioned by Brunel’s shipping company to manufacture hydraulic lifting jacks, or rams, to launch the steamship SS Great Eastern. The success of this project brought favourable attention to the firm, and it became involved in other notable projects, including the erection of Cleopatra’s Needle in London in 1878 and work on the Forth Road Bridge in Scotland. The firm underwent several name changes over the years, including James Tangye and Brothers (1857), Tangye Brothers and Price (1859), Tangye Brothers (1860), Tangye Brothers & Holman (1876), Tangye Brothers (by 1878), Tangye Ltd. (1881), and then simply Tangye. Its machinery and equipment were exported worldwide. In 1884, a branch with showrooms, offices, and a warehouse was opened in Melbourne at Cornwall House, Collins Street West. The firm was well known for producing high-quality machinery for agriculture and industry. Even today, new Tangye machinery is available for a subsidiary of Allspeeds. An extensive account of the firm’s history, names, inventions, and further references is available in Grace’s Guide, which also includes references to and diagrams of the Tangye horizontal steam engine. The horizontal steam engine was made by the well-known engineering firm Tangye, known for its high quality of manufacture. It was an important development in machinery because it helped improve productivity. Engines of this type are still used in some parts of the world today. This engine is a good example of a late 19th-century steam engine used in industry and agriculture and adapted for many different purposes. It is also important locally because it was connected to a local cheese making business and part of the thriving western district dairy industry. It may have been one of the Tangyes engines used at the Farnham butter factory or the Warrnambool Butter Factory, which was reported to be one of the most important in the Colony. It is also connected to the Warrnambool Technical School, established in 1968. Steam engine: stationary Tangye Size B, single-cylinder, horizontal Mill type steam engine. It has a 4-inch diameter cylinder with an 8-inch stroke. The body is painted green, and the Pickering governor is red. It was manufactured in Birmingham, England, in accordance with Tangye's Patent 238930, and distributed by Cameron and Sunderland, Melbourne, in the mid-1880s. TANGEYS PATENT BIRMINGHAM B SIZE 238930 CAMERON & SUTHERLAND MELBOURNE THE PICKERING PORTLAND . GOVERNOR . CONN. U.S.A.flagstaff hill, warrnambool, maritime village, maritime museum, flagstaff hill maritime museum and village, shipwreck coast, great ocean road, machine, invention, engine, steam, steam engine, horizontal steam engine, tangyes horizontal steam engine, stationary steam engine, single cylinder steam engine, manufacturing, farming, pumps, lifting equipment, engines, machine tools, hydraulic rams, hydraulic pumps, steam pumps, differential pulleys, mill type steam engine, 4 inch cylinder, weston’s differential pulley, thomas aldridge weston, 1862 international exhibition in london, brunel, ss great eastern, cleopatra’s needle, forth road bridge, cornwall house, collins street melbourne, agricultural machinery, industrial machinery, allspeeds, dairy, pump, richard tangye & brothers, james tangye and brothers, tangye brothers and price, tangye brothers, tangye brothers & holman, tangyes ltd., tangye, richard tangye, james tangye, joseph tangye, edward tangye, george tangye, cornwall works, birmingham, pickering governor, pickering portland connecticut usa, 19th century, dairy plant, steam power, tangye's patent 238930, tangye b size engine, cameron & sutherland, machine merchants, 1880s, mid-1880s, cheese manufacturer, butter manufacturer, diary industry, warrnambool technical school, belt driven machinery, agriculture, mechanical governor, farnham butter factory, warrnambool butter factory