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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.
Beginner
Unknown
Instructions
1
1
Make the clip block
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.
Materials for this step:
Brass Sheet1 four clips
Hardwood Block1 piece
Wood Screws4 piecesTools needed:
Tin Snips
Metal File
Screwdriver - Flat2
2
Make the fuse
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.
Materials for this step:
Glass Tube1 1 in
Unknown Metal1 tinfoil
Wheat Paste1 pieceTools needed:
Bench Glassblowing TorchTin Snips
Fine BrushesMaterials
6- 1 four clipsPlaceholder
- 1 piecePlaceholder
- 4 piecesPlaceholder
- 1 1 inPlaceholder
- 1 tinfoilPlaceholder
- 1 piecePlaceholder
Tools Required
5- Placeholder
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- Placeholder
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