Fig. 27.—Home-made Spirit-lamp
Fig. 28.—Another Home-made Spirit-lamp
A methylated wick lamp may be easily made out of a small “self-opening” canister, as shown in [Fig. 27]. The holes near the top increase the efficiency of the flame. Another spirit soldering-lamp is shown by [Fig. 28]. The container for the spirit can be made about 3 in. in diameter by about 11⁄2 in. deep, with a handle soldered on. A glance at the [illustration] will explain the burner. An outer wick surrounds a piece of tube, which itself contains another wick. The spirit in the inner tube is vaporised by the heat from the burner when the outside wick is lit. The spirit vapour issues from a 1⁄32-in. hole at A. At B a ring is slipped over the outer wick, holding it to the central tube. By lifting the central tube the height of the vaporising flame can be adjusted. The vaporising tube is a piece of 3⁄8-in. brass tube with a 3⁄8-in. gas cap screwed on the end, or a brass disc can be brazed in. The total cost should not exceed sixpence.
Fig. 29.—Swivelling Gas-burner for Bench Soldering
Bench Blowpipes.
—The best form of gas bracket for bench use is one having a horizontal swivelling arm, and screwed to the bench by a flange, as shown in [Fig. 29]. The swivelling head is also a cock, which shuts off the gas when the jet arm is pushed over at right angles to the edge of the bench, as indicated, and the gas is connected by an iron or compo pipe under the bench. A second gas tap should be arranged in the supply to regulate the amount of gas, and for reasons of safety. A simple device (see [Fig. 30]) may be made by anyone, and connected to a rubber-pipe connecting head on the gas bracket supplying light to the bench and workshop.
