Patent analysis ppt

1764, the school asked Watt to repair a Newgate steam engine. During the repair process, Watt became familiar with the structure and principle of the steam engine, and found two major shortcomings of this steam engine: the piston moves discontinuously and slowly; Low steam utilization rate and waste of raw materials. Later, Watt began to think about ways to improve it. Until the spring of 1765, during a walk, Watt thought that since the low thermal efficiency of newcomen steam engine was caused by steam condensation in the cylinder, why not let the steam condense outside the cylinder? Watt came up with the original idea of using an independent condenser. After having this idea, Watt designed a steam engine with an independent condenser in the same year. According to the design, there is a regulating valve between the condenser and the cylinder, so that they can be connected and separated. In this way, the steam after work can be introduced into the condenser outside the cylinder to generate the same vacuum in the cylinder, thus avoiding the heat consumption of the cylinder during cooling and heating. According to Watt's theory, the thermal efficiency of this new steam engine will be three times that of newcomen's steam engine. Theoretically, Watt's steam engine with separator condenser is obviously superior to newcomen's steam engine. However, there is still a long way to go to turn theoretical things into practical things and the steam engine on the drawing into a real steam engine. Watt has worked hard to build several steam engines, but the effect is not as good as that of newcomen's steam engine, and even there is air leakage everywhere, so it can't be started. Although the expensive experiment made him heavily in debt, he didn't flinch in the face of difficulties and went on with the experiment. When Blake knew Watt's goal and difficult situation, he introduced Watt to a very rich friend-roebuck, a chemical technician. At that time, roebuck was a very rich entrepreneur. He opened the first large-scale ironmaking plant in Caron, Scotland. Although roebuck was nearly 50 years old at that time, he was still enthusiastic about new inventions in science and technology. He was very appreciative of Watt's new device, which was only in his thirties at that time, and immediately signed a contract with Watt to sponsor Watt to try out a new steam engine. From 1766, in more than three years, Watt overcame the difficulties in materials and technology, and finally made the first prototype at 1769. In the same year, Watt won his first patent in the process of innovating newcomen steam engine for inventing condenser. Although the first steam engine with condenser was successfully trial-produced, compared with the newcomen steam engine, except the thermal efficiency was significantly improved, there was no substantial progress in the performance of driving other working machines as a power machine. In other words, Watt's steam engine still can't be used as a real power machine. .