[Illustration: Fig. 37.--Soldering Wires of Vegetable Masher]
[Illustration: Fig. 38.--Holder for Applying and Adjusting Solder]
Fig. 37 shows the wires of a vegetable masher being soldered. There is nothing special about the job, except that the solder cannot be placed on the joint. To effect this a piece of tin (Fig. 38) is indented at one end, and a small hole made in the centre of the depression. The bead of solder is placed in this depression, and held over the joint to be soldered; the flame is then played on the joint and on the solder which flows through the hole.
[Illustration: Fig. 39.--Brushing Solder around Dial Ring]
[Illustration: Fig. 40.--Tinning Dial Ring]
Figs. 39 and 40 show the method of tinning a brass dial ring. The ring is filed clean and placed on a piece of asbestos board, the flame being applied until the ring is sufficiently hot all round. A bead or two of solder is placed on, and, as they melt, the solder is brushed round as shown in Fig. 39 with the spirit brush, the flame being applied at intervals to aid the flow.
[Illustration: Fig. 41.--Re-soldering Kettle Spout]
=Re-soldering Kettle Spout.=--Refixing a spout in a “tinned” wrought-iron or copper kettle. The spout and that part of the kettle which comes in contact with it should first of all be filed bright and clean. Next place the spout in position, apply killed spirits, and hold it over a bunsen flame, as in Fig. 41, until sufficient of the strip solder is melted to flow around and sweat through to make a strong sound joint. Should any difficulty be experienced in getting the solder to flow readily, apply a little more flux.
=Soldering Corroded Metal.=--When the surface of metal to be soldered is badly corroded, and it is difficult to obtain a clean, bright surface preparatory to soldering, it should be treated to a liberal application of raw spirits of salts (hydrochloric acid), which will soon remove the cause of the trouble, but all traces of the acid should be washed away with clean water before attempting the soldering. It is also a good plan in these cases to tin the surface by repeatedly rubbing it with a hot bit and solder, together with plenty of killed spirits, before proceeding with the actual soldering process.