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.
Fig. 30.—Simple Bench Burner
Fig. 31.—Gas Blowpipe for Bench
A design of gas blowpipe which leaves one hand free is shown by [Fig. 31]. This enables the worker to apply the solder to the work (holding the end of a strip against it), after it has been brought to the melting heat of the solder. The blowpipe is arranged so that it can be held in the hand or dropped into a hole in the bench.