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
Dial Spring Scale with Tare Screw: Fray & Pigg, 1881
John S. Fray and Horace Pigg of Bridgeport, Connecticut, patented this weighing scale in 1881, US 243,539. A dish sits on the standard of a frame hung on two pairs of cross-arms, so it moves straight up and down. A coil spring on a right-angle lever carries the load, and a rack on the frame turns a pinion carrying the pointer round the dial. To take up the tare, a screw rod through the front of the case moves the lever's lower end. Because the spring hangs vertically from the lever's horizontal arm, the adjustment is more sensitive and the bearing surfaces fewer.
Àárín
Workshop process
Ìlànà
1
1
Case and frame
Case and frame
Make the upright case with removable front and top. Cast or otherwise form the frame with a standard that passes up through the top to the weighing dish, and pivot it on upper and lower cross-arms whose other ends pivot to the back of the case.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Àpótí òṣùwọ̀n1 ẹyọ
Férémù òṣùwọ̀n pẹ̀lú apá ìdábùú1 ẹyọ
Àwo ìwọ̀n1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ìṣù àwọn ohun ìyí skurú2
2
Spring and lever
Spring and lever
Pivot the right-angle lever at the back of the frame. Hang the coil spring from its horizontal arm and connect the spring's lower end to the frame by a screw, so the tension can be regulated.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Lefa igun ọ̀tún1 ẹyọ
Sípírínì yíyípo òṣùwọ̀n1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ìṣù àwọn ohun ìyí skurú3
3
Rack and dial
Rack and dial
Journal the pinion in a bracket so its front end passes through the dial plate and carries the pointer. Pivot the rack bar to the frame and keep it in mesh with a light spring, so the frame's descent turns the pointer.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀pá oníeyín àti pinion1 ẹyọ
Ojú àti abẹ́rẹ́ òṣùwọ̀n1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ìṣù àwọn ohun ìyí skurú
Ìdìpọ̀ ẹmú pípéye4
4
Tare screw
Tare screw
Pass the tare rod horizontally through the front of the case into a threaded opening in the lever's lower end, so turning it sets the pointer to zero with the container on the dish.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀pá ìṣó-àyídà ìyọkúrò ìwúwo àpò1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìgé ihá ìdábùúÀwọn ohun-èlò
8- 1 ẹyọÀyè
- Àyè
- 1 ẹyọÀyè
- 1 ẹyọÀyè
- Àyè
- Àyè
- Àyè
- Àyè
Àwọn irinṣẹ́ tó nílò
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