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
The Single-Blow Can Opener: A Ring of Pointed Teeth Punches the Hole
Cutting into a can with a single blade takes several cuts or blows.
Thomas A. McFarland of Meadville, Pennsylvania, received US 64,891, dated 21 May 1867, for "a cheap, simple, and effective implement for cutting an opening in a can by a single blow": a ring of curved pointed teeth on a handle's head, bevelled inside, whose points enter first and whose edges widen until they meet, punching out a plug that stays inside the cutter.
This rung works out why pointed teeth need so little force, then files the teeth on a steel tube and punches a can top with one blow.
Àárín
About 3 hours
Ìlànà
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Peak force and work
Peak force and work
Ń ṣí ìwé Jupyter…
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A single blade before it
A single blade before it
The embedded blueprint cuts a can top a slit at a time with one blade. McFarland rings the blade round into teeth so one blow cuts the whole opening.
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Read US 64,891
Read US 64,891
"In operation the tool is placed on the head of the can, and the points of the teeth driven in by a smart blow, and the cutters forced down until their forks or bases have cut through the can, when a piece will have been cut out of the form of the cutters."
"The teeth being bevelled on the inside tend to compress the plug removed, and cause it to remain inside the cutter, thus facilitating its removal from the can."
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Cut and mark the tube
Cut and mark the tube
Cut 40 mm of 25 mm steel tube. Mark six teeth round one end, 12 mm tall, their bases touching.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Páìpù irin ilé1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ayùn Irin
Ìdìmú Tábìlì
Ààmì Tí Kò Ní Parẹ́
Ìdíwọ̀n5
5
File the teeth
File the teeth
Saw a V between each pair of marks and file the teeth to points. Bevel each tooth's inside edge with a round needle file; leave the outside flush.
Àwọn irinṣẹ́ tí a nílò:
Ayùn Irin
Àwọn Ìfá (Ìfá Ọwọ́)
Àkójọ Ìfá KékeréÌdìmú Tábìlì
Gílásì Ààbò Tí Ó Mọ́6
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Fit the handle
Fit the handle
Sand a hardwood dowel to fit the tube's other end, glue 20 mm of it in with epoxy, and leave 100 mm as the handle.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Àwọn dowel igi líle1 ẹyọ
Ẹpọ́ksì Ẹ̀yà Méjì1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Bébà Ìfá
Òṣùwọ̀n Kálípà Díjítà Ìnṣì 67
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The build in 3D
The build in 3D
FreeCAD model of this build, not of the patent: a 25 mm steel tube with six 12 mm pointed teeth bevelled inside, on a hardwood handle.
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Punch a can top
Punch a can top
Stand a sealed can on a hardwood block. Set the teeth on its top and strike the handle once with the mallet; count the blows needed, and measure the plug with the caliper.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ìgò irin1 ẹyọ
Ìṣù Igi Líle1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Òòlù rọ́bàÒṣùwọ̀n Kálípà Díjítà Ìnṣì 6
Ìbọ̀wọ́ Iṣẹ́ AwọGílásì Ààbò Tí Ó Mọ́9
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Teeth that bend, skid or leave the plug
Teeth that bend, skid or leave the plug
Single-blow can opener troubleshooting.
Flow
Loading...
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History and honest limits
History and honest limits
**Thomas A. McFarland** of Meadville, Pennsylvania, received US 64,891, dated 21 May 1867, for opening oyster, fruit and other cans. The cutters are curved to fit a shoulder on the handle's head and fastened by screws; they may be one piece or sections. He disclaimed cutting an opening broadly, single shear-like cutters, and cork borers with spring handles, and claimed the handle and cutters cutting a plug at a single blow.
**Honest limits.** Mild steel tube is not hardened; the notebook's shear figures are estimates. Your blow counts are the result.
Àwọn ohun-èlò
5- 1 ẹyọÀyè
- 1 ẹyọÀyè
- 1 ẹyọÀyè
- 1 ẹyọÀyè
- 1 ẹyọÀyè
Àwọn irinṣẹ́ tó nílò
11- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
Àwọn fáìlì àpẹrẹ
1Ìtọ́nisọ́nà yìí ń ṣe
Blueprint tó jọra
Àwọn blueprint wọ̀nyí pín ìmọ̀ — ọ̀nà, ohun-èlò tàbí ìlànà
CC0 Àgbègbè Gbogbogbò
Blueprint yìí ti jáde lábẹ́ CC0. O lè ṣe àdàkọ, yí padà, pín, àti lò láìsí ìyọ̀ǹda.
Ṣàtìlẹ́yìn Olùṣẹ́dá nípa rírà àwọn ọjà nipasẹ̀ Blueprint wọn Ẹ̀san Olùṣẹ́dá tí àwọn Olùtajà gbé kalẹ̀, tàbí ṣẹ̀dá àtúnṣe tuntun ti Blueprint yìí kí o sì fi sínú Blueprint rẹ gẹ́gẹ́ bí ìsopọ̀ láti pín owó-wíwọlé.