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
Electric Soldering Iron: Miner, 1890
Earlier electric soldering irons heated a hollow copper head from inside, through finely divided carbon pressed against the tip, so the whole outside of the head lost heat to the air. Willard M. Miner of Plainfield, New Jersey, patented the alternative in 1890, US 421,185: keep the copper head solid, which holds its heat longer, and wind the heating resistance round the outside of it, under a shell that concentrates the heat on the copper and stops it escaping. The coil is German silver wire, wound round a reduced part of the head without touching it, with one end connected to the head and the other to the supply.
Àárín
Workshop process
Ìlànà
1
1
Turn the head
Turn the head
Turn a solid copper head with its point. A little back from the point, cut the head down to a smaller diameter for some distance, leaving a shoulder, and thread a shank at its rear end.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀pá bàbà yíká1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ Ìyí Irin2
2
Wind the coil
Wind the coil
Coil German silver wire round the reduced part of the head, the coil slightly larger than the head so the two do not touch. Connect one end of the coil to the head at the shoulder; the other end goes to the supply.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Wáyà ìdènà fàdákà Jámánì1 as requiredÀwọn irinṣẹ́ tí a nílò:
Ẹmú Àkópọ̀3
3
Shell
Shell
Slip on the shell, of brass lined with non-conducting material. Close its inner end with an insulating disc held by a washer and nut on the threaded shank.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Èèpo idẹ oníkọ̀ọ́ inú1 ẹyọ
Àwo ìparí ìdábòbò1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Kọ́kọ́rọ́ tí a lè ṣàtúnṣe4
4
Handle
Handle
Screw the shank into the metal socket in the handle, which takes the second connection.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Igi Líle Fún Ìdìmú1 ẹyọÀwọn ohun-èlò
5- 1 ẹyọÀyè
- 1 as requiredÀyè
- Àyè
- 1 ẹyọÀyè
- 1 ẹyọÀyè
Àwọn irinṣẹ́ tó nílò
3- Àyè
Ìtọ́nisọ́nà yìí ń ṣe
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