SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
The Balanced Yarn Reel: Geared Arms That Open Together
A skein of yarn must be held open on a turning reel while it is wound off into a ball. A reel that fits only one skein size, or wobbles as it turns, tangles the yarn.
Charles S. Foster of Pawtucket, Rhode Island, received US 376,590, dated 17 January 1888, for a yarn-reel whose pivoted arms are geared to a common toothed wheel, so they open together. "The circumference thereof may be increased about fifty per cent", and "the reel is always practically balanced, thereby maintaining a uniform tension upon the unwinding yarn".
This rung works out which skeins a reel fits and how much an off-centre arm shakes it, then builds an adjustable reel and winds a skein off it.
Kati
About 4 hours
Maagizo
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1
Skein fit and the shake of an unbalanced arm
Skein fit and the shake of an unbalanced arm
Inapakia daftari la Jupyter…
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2
Why an off-centre mass shakes
Why an off-centre mass shakes
The embedded blueprint shows how an unbalanced rotor vibrates. Foster's geared arms keep the reel balanced at every setting.
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3
Read US 376,590
Read US 376,590
"In my improved reel herewith the circumference thereof may be increased about fifty per cent. over the minimum circumference of the reel, the latter corresponding to the closed position of the arms."
"An important advantage possessed by my reel is that in whatever position the pivoted arms or extensions may be adjustably secured to the center wheel or 'spider' the reel is always practically balanced, thereby maintaining a uniform tension upon the unwinding yarn."
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4
Build an adjustable reel and wind a skein off
Build an adjustable reel and wind a skein off
Cut a hardwood hub and drill it to turn on a dowel held upright in a clamp. Pivot four equal hardwood arms at the hub's rim with wood screws, so each can swing out. Tie a cord from each arm's inner end to one ring, so pulling the ring swings all four out together.
Measure the reel's circumference closed and fully open. Open it to fit a skein and wind the skein off into a ball, noting any tugs in the yarn. Then set one arm further out than the others and wind again. Compare with the notebook.
Vifaa kwa hatua hii:
Ubao wa Mti Mgumu1 kipande
Kigingi cha mbao1 kipande
Parafujo za mbao8 vipande
Kamba ya pamba1 kipande
Fungu la uzi wa sufu1 kipandeZana zinazohitajika:
Kizunguko cha kufungulia fungu la uzi
Vibano
Msumeno wa mkono
Kekee cha Betri
Tepi ya kupimia5
5
A reel that wobbles, tangles or drops the skein
A reel that wobbles, tangles or drops the skein
Yarn reel troubleshooting.
Flow
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6
History and honest limits
History and honest limits
**Charles S. Foster** of Pawtucket, Rhode Island, filed US 376,590 on 11 May 1887; it is dated 17 January 1888. (The filing year prints broken on the scan; serial no. 237,830 places it in 1887.) The ends of the arms carry wooden spools.
**Honest limits.** The notebook treats one arm as a point mass out of line and ignores the yarn's own pull. Skein sizes, masses and speeds are examples. Your winding is the measurement.
Vifaa
5- 1 kipandeKishikilia Nafasi
- 1 kipandeKishikilia Nafasi
- 8 vipandeKishikilia Nafasi
- 1 kipandeKishikilia Nafasi
- 1 kipandeKishikilia Nafasi
Zana Zinazohitajika
5- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- 1 vendor sell this, none ship to you yetKishikilia Nafasi
- 1 vendor sell this, none ship to you yetKishikilia Nafasi
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
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