예술
뷰티 및 웰니스
공예
문화 및 역사
엔터테인먼트
환경
음식 및 음료
역공학
과학
스포츠
기술
웨어러블
The Lid-Lifting Can Opener: One Lip Presses Down While the Other Lifts
A fruit can's tin cover, pressed onto a rubber ring, can stick so hard that prising it off hurts the fingers.
O. J. Livermore of Worcester, Massachusetts, received US 55,878, dated 26 June 1866, for a can opener for "Lyman's patent can": a handle, a part that passes over the cover with an inclined lip below it, and a curved piece whose angular edge goes under the cover's far side; raising the handle presses one side down and lifts the other.
This rung compares the force holding a vacuum-sealed lid with what the lever gives, then bends the opener from flat bar and lifts a sealed jar lid with it.
초급
About 2 hours
안내
1
1
Holding force against lever force
Holding force against lever force
Jupyter 노트북 불러오는 중…
2
2
A sealed jar before it
A sealed jar before it
The embedded blueprint seals food in a screw-top jar. Livermore's lever lifts a pressed-on cover of the same kind without fingernails.
3
3
Read US 55,878
Read US 55,878
"In trying to remove the cover under such circumstances persons without proper conveniences at hand for the purpose often injure their fingers and nails."
"Handle B is now raised, which causes the inclined lip D to force the cover down and toward the can on that side, while the angular lip a elevates the other side of the cover, as shown in red lines."
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4
Bend the head
Bend the head
Cut 220 mm of 25 × 3 mm flat bar. Bend the last 15 mm down at about 60° in the vice for the inclined lip, 30 mm from it bend the bar level again: the part over the cover.
이 단계의 재료:
연강 평강1 개필요한 도구:
쇠톱(핵소)
바이스(만력)
망치
자
유성 매직
가죽 작업 장갑5
5
Add the lifting piece
Add the lifting piece
Cut 60 mm of the bar, curve it on the anvil, and file one end to a sharp angular edge. Drill both pieces and screw the curved one under the bar, its edge 70 mm from the lip.
이 단계의 재료:
연강 평강1 개
기계 나사1 개
육각 너트1 개필요한 도구:
쇠톱(핵소)
모루망치
줄 (손줄)
센터 펀치
무선 드릴
드릴 비트 세트
멍키스패너
투명 보안경6
6
The patent drawing
The patent drawing
US 55,878 drawing sheet, public domain (expired patent).
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7
Seal a jar and lift its lid
Seal a jar and lift its lid
Fill a Mason jar with water from the kettle at the boil, put on a new flat lid, screw the band on and let it cool for two hours so the lid pulls down. Then remove the band. Try to lift the lid with the force meter's hook under its edge; note the force. Then set the opener on it and lift with the meter on the handle's end.
이 단계의 재료:
저장 유리병(메이슨)1 개
물1 개필요한 도구:
가스레인지용 주전자
힘 측정기(스프링 저울)
내열 장갑8
8
An opener that slips, bends or scratches
An opener that slips, bends or scratches
Lid-lifting can opener troubleshooting.
Flow
Loading...
9
9
History and honest limits
History and honest limits
**O. J. Livermore** of Worcester, Massachusetts, assignor to himself and Clark, Sawyer & Co., received US 55,878, dated 26 June 1866. Lyman's cover fits over a rubber packing ring in a groove on the can; a groove lets a pin admit air, but the cover often adheres by corrosion and other causes. His opener works even before the air is admitted, though more easily after.
**Honest limits.** A cooled Mason jar stands in for Lyman's can, and two screwed pieces for his one-piece tool. Your forces are the result.
이 블루프린트로 만드는 것
관련 블루프린트
이 블루프린트들은 지식을 공유합니다 — 기술, 재료 또는 원리
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이 블루프린트는 CC0로 공개되었습니다. 어떤 목적으로든 자유롭게 복사, 수정, 배포 및 사용할 수 있습니다.
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