Specification of Robert Hawthorn and William Hawthorn : promoting combustion and prevention of smoke in coal-burning locomotives, &c.

  • Hawthorn, R. (Robert)
Date:
1859
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Robert Hawthorn and William Hawthorn : promoting combustion and prevention of smoke in coal-burning locomotives, &c. Source: Wellcome Collection.

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    II, <Sf W. Hawthorn s Tmpts. in Preventing SmoJce in Coal-burning Furnaces, <§rc. deflecting plates and distance pieces interposed between them for the purpose of keeping the plates at a proper distance apart. Each of these bolts is made fast by a nut at top and bottom, and the lower portions of the bolts is slotted to receive the keys D, D, (shewn in Figure 2), for the purpose of tightening the several plates and distance pieces up against the top of the frame. A 5 third bolt E, also fitted with distance pieces, passes through the plates at right angles to the plane of their inclination, and serves in conjunction with the front bolts C to hold the whole of the plates firmly together; F, F, are laterally deflecting pieces which may or may not, as desired, be placed or inter¬ posed between the vertically deflecting plates B for the purpose of directing 10 the air right and left over all parts of the surface of the fuel in the fire-box or other furnace. In practice the deflecting plates F may be rivetted on to the plates B. The frame A of the fire-door is rivetted to the hinge plate G, which carries the adjustable apparatus or damper for regulating the admission of air to the furnace. 15 In the Drawings annexed this apparatus consists of two slotted plates II and I, the one sliding over the other so as to open or close the apertures therein, but we do not restrict or confine ourselves to this particular mode of regulation, as any other convenient arrangement may be employed to accom¬ plish this object. To the hinge plate is also fitted the latch K of the fire- 20 door, and on this latch is rivetted the handle L, the object of which is to enable the door to be pulled straight back before being opened or turned on its hinges. For this purpose the hinge plate traverses the slotted eyes of the brackets M, M, thereby clearing the ends of the deflecting plates from the sides of the fire hole. These slotted brackets are carried by plates N, N, 25 firmly secured to the boiler or casing, the whole being made sufficiently strong to bear the weight of the fire-door and deflecting plates and regulators. The length of the slots in the brackets should be equal to the thickness of the casing in locomotive boilers. By this arrangement the deflecting plates may be allowed to fill up the 30 entire breadth of the opening of the fire hole, thereby allowing no air to pass into the furnace but what is deflected by the plates before referred to, or the door may be fitted with an ordinary hinge without the slotted bracket M. The number of deflecting plates used in the door will be regulated by the size of such door, the quantity of air to be admitted, and the size of the intervals or 35 spaces between the plates. It is obvious that other methods may be adopted in securing these plates which it is unnecessary to describe, as we do not confine ourselves to any particular mode of securing the same.