Fuse: a Tinfoil Fuse in a Glass Tube, with a Brass-Clip Block (Boy Mechanic, 1919)

A small cartridge fuse for battery circuits: a thin strip of tinfoil inside a short glass tube, its ends capped with pasted foil, held in spring clips of brass on a wooden block. Variable: the strip's width, 1/8 in or less, to suit the current. Source: The Boy Mechanic, Book 3 (1919), pp. 151-152. Picture: the book's sketch.

初学者

Unknown

说明

Make the clip block

Shape four pieces of sheet brass and screw them to a wooden base so their upper ends form spring clamps that hold a glass tube about 1 in long (sketch). Wire the clamps into the circuit.

此步骤所需材料：

黄铜板1 four clips

硬木块1 个

木螺钉4 个

所需工具：

铁皮剪

金属锉

一字螺丝刀

Make the fuse

Cut a piece of glass tubing about 1 in long. Cut a very thin strip of tinfoil about 1 1/2 in long and 1/8 in or less wide, to suit the current. Lay it through the tube and bend its ends over the rim. Wrap a piece of tinfoil round each end, over the strip's ends, and paste it to the tube. Push the fuse into the clips.

此步骤所需材料：