2012, ISBN: 1130531732

[EAN: 9781130531732], Neubuch, [PU: Rarebooksclub.com, United States], Brand New Book ***** Print on Demand *****.This historic book may have numerous typos and missing text. Purchasers c… More...

[EAN: 9781130531732], Neubuch, [PU: Rarebooksclub.com, United States], Brand New Book ***** Print on Demand *****.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 Excerpt: . opening. In some cases, two cylinders only are employed, whose equivalent diameters are 25-inch and 48-inch, or 50-inch, with a stroke of 6 feet as before. Each piston propels a separate crank on the opposite ends of a crank shaft; the crank, which is driven by the high-pressure piston, being set 135 in advance of that driven by the piston of the low-pressure cylinder. This arrangement is somewhat cheaper in first cost and maintenance, while it is little, if at all, inferior in producing an equable motion. When the cranks approach positions directly opposite to each other, there is a small saving in coal, at the sacrifice of some degree of equable motion. Steam cylinders are usually moulded in loam, the inside being formed by a separate core; both mould and core must be thoroughly dried, either in a stove or by a special fire built underneath. The cylinders are moulded and cast in a vertical position, whatever position they may be intended to assume when complete; the upper end in casting is left longer, forming a head, which is cut away when the casting is bored, and leaves the effective casting more dense in texture. The ports are made as direct as possible, to reduce the clearance (Fig. 15); the slide valve is then divided into two; also two separate exhaust ports are required. As before mentioned, this causes the exhaust passages to have a large area of surface in contact with the cylinder body, and leads to a larger area of valve and increased friction, unless (as is seldom the case) the valves are balanced. It may be noticed that a cylinder, 18 inches in diameter by 6 feet stroke, is a somewhat awkward casting; and the ports, if a single valve was employed, would require more delicate treatment than moulders usually bestow upon any work, so that prac.<

2012, ISBN: 1130531732

[EAN: 9781130531732], Neubuch, [PU: Rarebooksclub.com, United States], Brand New Book ***** Print on Demand *****.This historic book may have numerous typos and missing text. Purchasers c… More...

[EAN: 9781130531732], Neubuch, [PU: Rarebooksclub.com, United States], Brand New Book ***** Print on Demand *****.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 Excerpt: . opening. In some cases, two cylinders only are employed, whose equivalent diameters are 25-inch and 48-inch, or 50-inch, with a stroke of 6 feet as before. Each piston propels a separate crank on the opposite ends of a crank shaft; the crank, which is driven by the high-pressure piston, being set 135 in advance of that driven by the piston of the low-pressure cylinder. This arrangement is somewhat cheaper in first cost and maintenance, while it is little, if at all, inferior in producing an equable motion. When the cranks approach positions directly opposite to each other, there is a small saving in coal, at the sacrifice of some degree of equable motion. Steam cylinders are usually moulded in loam, the inside being formed by a separate core; both mould and core must be thoroughly dried, either in a stove or by a special fire built underneath. The cylinders are moulded and cast in a vertical position, whatever position they may be intended to assume when complete; the upper end in casting is left longer, forming a head, which is cut away when the casting is bored, and leaves the effective casting more dense in texture. The ports are made as direct as possible, to reduce the clearance (Fig. 15); the slide valve is then divided into two; also two separate exhaust ports are required. As before mentioned, this causes the exhaust passages to have a large area of surface in contact with the cylinder body, and leads to a larger area of valve and increased friction, unless (as is seldom the case) the valves are balanced. It may be noticed that a cylinder, 18 inches in diameter by 6 feet stroke, is a somewhat awkward casting; and the ports, if a single valve was employed, would require more delicate treatment than moulders usually bestow upon any work, so that prac.<

2012, ISBN: 1130531732

[EAN: 9781130531732], Neubuch, [PU: Rarebooksclub.com, United States], Brand New Book ***** Print on Demand *****.This historic book may have numerous typos and missing text. Purchasers c… More...

[EAN: 9781130531732], Neubuch, [PU: Rarebooksclub.com, United States], Brand New Book ***** Print on Demand *****.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 Excerpt: . opening. In some cases, two cylinders only are employed, whose equivalent diameters are 25-inch and 48-inch, or 50-inch, with a stroke of 6 feet as before. Each piston propels a separate crank on the opposite ends of a crank shaft; the crank, which is driven by the high-pressure piston, being set 135 in advance of that driven by the piston of the low-pressure cylinder. This arrangement is somewhat cheaper in first cost and maintenance, while it is little, if at all, inferior in producing an equable motion. When the cranks approach positions directly opposite to each other, there is a small saving in coal, at the sacrifice of some degree of equable motion. Steam cylinders are usually moulded in loam, the inside being formed by a separate core; both mould and core must be thoroughly dried, either in a stove or by a special fire built underneath. The cylinders are moulded and cast in a vertical position, whatever position they may be intended to assume when complete; the upper end in casting is left longer, forming a head, which is cut away when the casting is bored, and leaves the effective casting more dense in texture. The ports are made as direct as possible, to reduce the clearance (Fig. 15); the slide valve is then divided into two; also two separate exhaust ports are required. As before mentioned, this causes the exhaust passages to have a large area of surface in contact with the cylinder body, and leads to a larger area of valve and increased friction, unless (as is seldom the case) the valves are balanced. It may be noticed that a cylinder, 18 inches in diameter by 6 feet stroke, is a somewhat awkward casting; and the ports, if a single valve was employed, would require more delicate treatment than moulders usually bestow upon any work, so that prac.<