IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Rubber Balloons: Two Circles of Natural Rubber Sheet Pressed Together at the Edge
Michael Faraday made the first rubber balloon in 1824, and by 1825 Thomas Hancock sold them as two rubber circles to be joined by pressing their edges together. Cut two circles with a neck tab from thin natural rubber sheet, dust the inner faces, and press the fresh-cut edges hard together.
The picture: our diagram, two circles joined into a balloon.
Olùbẹ̀rẹ̀
Half an hour
Ìlànà
1
1
Cut the circles
Cut the circles
Draw a paper circle with a short neck tab, lay it on thin rubber sheet and cut two matching pieces.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ewé rọ́bà àdánidá0.05 m2Àwọn irinṣẹ́ tí a nílò:
Bébà
Gègé
Ìṣẹ́ná2
2
Dust the insides
Dust the insides
Dust the inner face of each piece lightly with talc, keeping it off the outer edge.
Àwọn irinṣẹ́ tí a nílò:
Ìyẹ̀fun talcum3
3
Join the edges
Join the edges
Lay the two pieces together and press and rub the fresh-cut edges hard all round, leaving the neck open.
Àwọn irinṣẹ́ tí a nílò:
Ìṣẹ́ná4
4
Test
Test
Blow gently into the neck and listen for leaks; press any leaking edge again.
Àwọn irinṣẹ́ tí a nílò:
Ìyẹ̀fun talcum5
5
Circle size
Circle size
Ń ṣí ìwé Jupyter…
Àwọn ohun-èlò
1- 0.05 m2Àyè
Ìtọ́nisọ́nà yìí ń ṣe
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