I want to introduct something about Auto Leak Hunting Machine. 
Application: It is suitable for testing the sealing features of products, like water leaking prevention, wind prevention, which needs in raincoats, ski-coat, diving coat, tent, motocar cover and ship cover as well.Features: 1. Controlled by electromotion, much more simple and saving labor with high efficiency. 2. Auto/ hand recovery, simply operation. 3. Suitable for testing variety of products. 4. Control testing time and pressur freely. 5. Portable, convenient to move and cover less space. 6. Sperate controlled switch with water gap, stable pressure. 7. Imported well-known branded pump, lasting use and low noise.Technical Parameter: ModelV-168 Pressure Range0-0.4kg/cm2 Testing Area80cm2 The Max Pressure0.5 MPa Weight39kg Appearance Specification310¡Á620¡Á1150mm Auto Leak Hunting Machi James Rumsey James Rumsey 1743-1792) was an American mechanical engineer chiefly known for exhibiting a boat propelled by machinery in 1787 on the Potomac River at Shepherdstown, now West Virginia, before a crowd of local notables, including Horatio Gates. A pump driven by steam power ejected a stream of water from the stern of the boat and thereby propelled the boat forward. Little is known about Rumsey until he was living in Bath, Virginia, (now Berkeley Springs, West Virginia) in 1782. He likely had moved to the area with his family some years before the American Revolution, from Calvert County, Maryland, where he had helped to run the family water mill at Bohemia Manor. In Bath, he built houses, became a partner in a mercantile business, and helped to run a boarding house and tavern called the "Sign of the Liberty Pole and Flag." Contents 1 Early efforts and the Patowmack Company 2 Work in Shepherdtown 3 Other innovators and Rumseian Societies 4 References 5 External links // Early efforts and the Patowmack Company In September 1784, when George Washington was staying at Rumsey's inn, he contracted with Rumsey to build a house and stable on property he owned at Bath. During this visit, Rumsey showed Washington a working model of a mechanical boat which he had designed. It had a bow-mounted paddlewheel that worked poles to pull the boat upstream. Washington had been making plans for making the Potomac river navigable since before the Revolution, and a company was soon to be formed for the purpose. Rumsey's pole-boat, which promised to be able to ascend the river's chutes and swift currents, must have seemed a godsend to Washington, who wrote a certificate of commendation for Rumsey and likely let him know of the river project. Armed with the certificate, Rumsey obtained a patent from the Virginia legislature for "the use of mechanical boats of his design" and also gained an investor. In July 1785, he was recommended by Washington and appointed the superintendent of the newly formed Patowmack Company. Thus the work on the river would be overseen by the man designing the riverboat to run on it. For a year, Rumsey oversaw work on the Potomac River at present-day Great Falls, while his assistant and brother-in-law Joseph Barnes did much of the building of the boat around Shpeherdstown. Rumsey had quickly concluded that the pole-boat design was too limited and decided to incorporate steam propulsion into his design. While making his boat much more useful, it also made the building of it far more complex and expensive. Likewise, it soon was obvious that the Patowmack Company had a much greater task than any of its members had foreseen. It required great quantities of brute labor and difficult blasting, and Rumsey found himself directing a large and restive gang of about a hundred workmen, including leased slaves and bondsmen, encamped in a remote area, without adequate supplies. After a year Rumsey said he would resign if not given an increase in pay. Instead of an offer, his resignation was accepted, and his assistant, Richardson Stewart, was given his job. Other aspects of the matter are open to debate; Stewart may or may not have worked against Rumsey to gain his job; Rumsey thought he had, the Company (and Washington) thought Rumsey's allegations unfounded. Still, according to Company minutes, Stewart was fired soon afterward, for "sundry charges of a serious nature". Work in Shepherdtown Work on a hull had begun in 1785 in Bath by Joseph Barnes. The boat was brought that fall to Shepherdstown. Valve castings, cylinders, and other pieces which had been made in Baltimore and Frederick were installed that December, and the boat was taken downriver to Shenandoah Falls for a test. However, bad weather postponed testing until the following spring. When Rumsey finally tested the boat, it proved very unsatisfactory. The pole-boat mechanism caused the boat to yaw in the current, which disabled the paddlewheel and stopped the boat. In the steam pump, the engine consumed too much steam; the boiler was inadequate. It may be that, having left the Patowmack Company, Rumsey was loath to work on a propulsion system limited to be used on rivers. Or, lacking money from the Patowmack Company, he wished to concentrate his efforts on the more promising steam pump. At some point in 1786, work on the pole-boat mechanism was abandoned. For a better boiler, he tried a coil of forged iron pipe, which proved to be not only much more efficient but much smaller and lighter. With a functioning steam engine, another problem revealed itself. The single cylinder pump would draw several gallons of water of water from beneath the boat, send it down a copper pipe to the stern. Because gallons of water were being drawn into the pump at the same time as water was still flowing from it to the stern, the pump was...(and so on) To get More information , you can visit some products about edwards vacuum pumps, bellows pump, hydraulic motor pump, electric air pumps, automotive electric water pump, compressor pumps, 12v dc pump, fuel nozzles, high heel pump, cooking oil pump, . The Auto Leak Hunting Machine products should be show more here!
