Image
|
Title: |
1895 Article-Shipman Engine Manufacturing Co., |
|
Source: |
Modern Mechanism 1895 pg 320-321 |
|
Insert Date: |
6/11/2011 9:49:31 PM |
|
The Shipman Engine and Boiler, made by the Shipman Engine Co., Boston, is shown in Fig. 67. A sectional view of the engine and a side view of the connecting-rod are shown in Fig. 68. The boiler used in engines of from 1 to 6 horse-power is shown in Fig. 6. This motor is a petroleum-burning steam engine, for use either on launches or in houses where a moderate amount of power is required. It is automatic, so that, when once steam has been generated in the boiler, practically no further attention is required beyond that of opening and shutting the steam-valve whenever the engine is started or stopped, the fire, speed, and water-feed being so arranged as to attend to themselves. The engine is built upon the same frame as the boiler. This latter is composed of tubes about 18 in. long, which are screwed into a flat, oblong chamber at one end and closed at the other, and is fired externally. Two small aspirators or atomizers, taking steam from the boiler, suck up the petroleum, which is used as fuel, from a chamber below, and drive it into the furnaces in the form of a fine spray. A couple of torches ignite this spray as it passes inward, and the flames produced by its combustion rush round and among the boiler-tubes. The amount, of steam and petroleum that is used by the atomizers is regulated by a diaphragm connected to a valve in the steam-pipe that supplies them. This diaphragm is exposed to the steam-pressure on the one side, and is held down by a spring, loaded to a certain pressure, on the other, and moves upward or downward as the steam exerts more pressure than the spring, or vice versa. Its movement is conveyed to the valve by means of a rod, and it thus regulates the amount of steam passing at any moment to the atomizers. In this way the fire is made to vary inversely as the pressure in the boiler, and thus keeps the latter constant. The petroleum is stored in a tank at any convenient distance from the motor, and is led to it through a pipe having a regulating valve in it. The water in the boiler is kept at a constant level by means of a float, connected to a tap in I he suction-pipe of the pump. This float is placed in a chamber, which is joined to the top and bottom of the boiler, and rises or falls with the level of the water. The movement is conveyed, through a stuffing-box and by means of levers, to the tap in the suction-pipe, which it opens or closes as the water-level changes. |
|
|
|
|