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Bench Glassblowing Torch: Brass Gas Blowpipe with a Glass Air Jet (Shenstone, 1916)
A glassblower's gas blowpipe you can make yourself: a brass tube with a side tube for gas, and a glass air jet down its middle fed from a foot-blower. A fine jet gives the small pointed flame for joints, and a wider jet the big brush flame for heating large tubes. It is pegged into a wooden block on a sheet-iron-covered bench, with taps for gas and air at the bench edge.
Result: a bench blowpipe for working glass tube. Make two: one about 11 mm bore for small work, one 15 to 17 mm for large.
Source: W. A. Shenstone, The Methods of Glass-Blowing (1916), pp. 3-9. Unknown: the brazing metal and the tap type. Picture: Fig. 1 of the book.
中级
Unknown
说明
1
1
Braze the gas inlet
Braze the gas inlet
Take a brass tube for the body: about 11 mm bore for the small blowpipe, 15 to 17 mm for the large one. Braze a side tube for the gas onto it 10 to 12 cm from the back end, according to the tube's size. Fix a spike to it for mounting. Ours: borax as the flux. Not given: the brazing metal.
此步骤所需材料：
黄铜管1 body and side tube
未知金属1 brazing metal and spike
硼砂粉1 brazing flux所需工具：
钢锯
锻炉2
2
Fit the glass air jet
Fit the glass air jet
Fit a glass tube down the middle of the brass tube, held by a cork at the back end, its tip near the mouth. For the small pointed flame, draw the tip down to the size of a large knitting needle. For a large flame rich in air, the tip may be nearly half the bore of the brass tube. Make several air tubes of different sizes for each blowpipe.
此步骤所需材料：
玻璃管3 air jets of several sizes
软木塞1 jet cork所需工具：
本生灯3
3
Set up the bench
Set up the bench
Cover the bench round the blowpipe with sheet iron. Drill several holes in a block of wood so the spike can be set at different positions. Fix two taps near the bench edge, one for gas and one for air. Connect them by flexible tubes to the supplies on one side and to the blowpipe's gas inlet and air jet on the other. Ours: mild steel sheet, rubber tubing. Not given: the tap type.
此步骤所需材料：
低碳钢板1 bench cover
硬木块1 mounting block
未知阀门2 gas and air taps
橡胶管1 flexible tubes所需工具：
台钻4
4
Light it and blow
Light it and blow
Light the gas at the mouth and work a foot-blower to drive air through the glass jet into the burning gas. Little air and a small jet give the pointed flame; plenty of gas and a strong blast give the large, non-luminous brush flame.
所需工具：
风箱材料
9- 1 body and side tube占位符
- 1 brazing metal and spike占位符
- 1 brazing flux占位符
- 3 air jets of several sizes占位符
- 1 jet cork占位符
- 1 bench cover占位符
- 1 mounting block占位符
- 2 gas and air taps占位符
- 1 flexible tubes占位符
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