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
Stopwatch: Lugrin, 1876
Henri Alfred Lugrin of New York patented this timing watch in 1876, US 176,231. Instead of placing the timing hand on the face, where it needs more gearing, he put the timing hand and its own dial on top of the watch movement. The hand is geared to the watch's second wheel through a pinion and wheel, and sits on its post by a tube and friction spring, so it can be stopped while the watch runs on. A heart-shaped cam and lever return it to the start, and the same lever also returns a minute hand on a small sectional dial beside it. A stop lever holds the timing hand. Lugrin's hand moves in fifths of a second but he calls it the quarter-second hand.
Ilọsíwájú
Watchmaker's work
Ìlànà
1
1
Timing hand and dial
Timing hand and dial
Mount the timing hand and its dial on top of the watch movement, the hand on a short centre post.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ẹ̀rọ inú aago1 ẹyọ
Abẹ́rẹ́ àti ojú ìwọ̀n àkókò1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ìdìpọ̀ ẹmú pípéye
Ìṣù àwọn ohun ìyí skurú2
2
Gear it to the movement
Gear it to the movement
Gear the post to the second wheel of the watch train through a pinion and wheel.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Pinion àti àgbá ìlà ìwọ̀n àkókò1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ìdìpọ̀ ẹmú pípéyeÌṣù àwọn ohun ìyí skurú3
3
Friction connection
Friction connection
Connect the hand to its post by a tube and friction spring, so the hand can be stopped without stopping the movement.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Sípírínì àti ọ̀pá ìfarakanra1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ìdìpọ̀ ẹmú pípéye4
4
Minute recorder
Minute recorder
Place the minute hand and its sectional dial at one side of the timing hand, on a post geared with the barrel wheel, connected by the same kind of tube and friction spring.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Abẹ́rẹ́ àti ojú ìkà ìṣẹ́jú1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ìdìpọ̀ ẹmú pípéyeÌṣù àwọn ohun ìyí skurú5
5
Return and stop
Return and stop
Fit the heart-shaped cams and the return lever, extended so one lever returns both hands to the start at once, and fit the stop lever.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Kámù ọkàn àti ọ̀pá ìdápadà1 ẹyọ
Ọ̀pá ìdádúró1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ìdìpọ̀ ẹmú pípéyeÌṣù àwọn ohun ìyí skurúÀwọn ohun-èlò
7- 1 ẹyọÀyè
- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
- 1 ẹyọÀyè
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