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VAZI
Spirit Level: Moulded Glass Vials, Filled and Trued
A spirit level's vial is a glass tube almost filled with liquid, leaving a bubble. Alcohols such as ethanol are used rather than water, often coloured with fluorescein; a level that must work either way up uses a barrel-shaped vial, slightly wider in the middle. A 1985 patent makes vials by heating a glass tube, putting it in a mould with a row of vial-shaped cavities and blowing it out to fill them, then cutting the vials apart, sealing their ends with heat, drilling a hole, filling through it and closing it, for example with solder. The vial is set in the body and trued: read the level, turn it end for end, and move the vial to take up about half the difference, until the reading is the same both ways.
Juu
Factory process
Maagizo
1
1
Blow the vials
Blow the vials
Heat the glass tube, place it in the multi-cavity mould, seal one end and blow air into the other so the tube fills every cavity.
Vifaa kwa hatua hii:
Seti ya Mirija ya Kioo1 kipandeZana zinazohitajika:
Kichomeo cha Bunsen
Kalibu yenye mashimo mengi ya viputo vya timazi2
2
Cut and seal
Cut and seal
Cut the vial sections apart and seal their open ends with heat.
Zana zinazohitajika:
Kichomeo cha Bunsen3
3
Fill
Fill
Drill a small hole, fill the vial with coloured alcohol leaving a bubble, and close the hole, for example with solder.
Vifaa kwa hatua hii:
Etanoli ya maabara, 95 %1 as required
Floresini1 as required
Waya wa Lehemu1 as required4
4
Set and true
Set and true
Set the vial in the body. Read the level, turn it end for end, and move the vial to take up about half the difference; repeat until the reading is the same both ways.
Vifaa kwa hatua hii:
Mwili wa timazi ya maji (fimbo iliyonyooka)1 kipandeVifaa
5- 1 kipandeKishikilia Nafasi
- 1 as requiredKishikilia Nafasi
- 1 as requiredKishikilia Nafasi
- 1 as requiredKishikilia Nafasi
- Kishikilia Nafasi
Zana Zinazohitajika
2- Kishikilia Nafasi
- Kishikilia Nafasi
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