예술
뷰티 및 웰니스
공예
문화 및 역사
엔터테인먼트
환경
음식 및 음료
역공학
과학
스포츠
기술
웨어러블
Crank-Point Can Opener: A Bent Point to Turn On, a Knife Set in a Slot
Forge

작성자

Forge

6. 10월 2026NO
34
0
0
0
0

Crank-Point Can Opener: A Bent Point to Turn On, a Knife Set in a Slot

A can opened with a lever knife leaves a jagged hole of any size. Samuel D. Lecompte of Leavenworth, Kansas, received US 50,011, dated 19 September 1865, for an instrument for opening fruit and other sealed cans: a bar with a handle, its end bent like a crank and pointed so that, thrust through the top, the bent part is held by the edges of the hole as a bearing; a knife slides along a slot in the bar on a set screw, and the instrument is turned round to cut. This rung works out where to set the knife for each can, then forges the bar, crank and knife and cuts a round opening.
중급
About 3 hours

안내

1

Knife position for each can

Jupyter 노트북 불러오는 중…
2

A lever opener before it

The embedded blueprint saws round a can with a lever knife. Lecompte gives the knife a centre to turn about and a slot to set its radius.
3

Read US 50,011

"The end of the instrument is bent somewhat in the form of a crank, and pointed, as shown by the letters b c in Fig. 1. This enables the instrument to be thrust into the top of the can in such manner that the part c, which is bent at right angles to the bar A, will be encircled by the edges of the hole made in the top of the can, thus insuring a good and sufficient bearing to enable the instrument to be operated."
4

Slot the bar

Cut 170 mm of 25 × 3 mm flat bar. Drill a row of 5 mm holes along its centre from 25 to 70 mm from one end and file them into a slot.

이 단계의 재료:

연강 평강연강 평강1 개

필요한 도구:

쇠톱(핵소)쇠톱(핵소)
바이스(만력)바이스(만력)
센터 펀치센터 펀치
무선 드릴무선 드릴
드릴 비트 세트드릴 비트 세트
정밀 줄(니들 파일) 세트정밀 줄(니들 파일) 세트
자자
5

Forge the crank point

File the bar's slotted end down to 6 mm wide for its last 30 mm. Bend it down 15 mm, along 10 mm, and down again 15 mm in the vice, and file the end to a sharp point.

필요한 도구:

줄 (손줄)줄 (손줄)
바이스(만력)바이스(만력)
망치망치
투명 보안경투명 보안경
6

Make the knife

Cut a 6 × 25 mm knife from 1 mm steel sheet with a pointed lower end and a 5 mm hole at the top. Hone its edge.

이 단계의 재료:

연강 판연강 판1 개

필요한 도구:

판금 가위판금 가위
무선 드릴무선 드릴
드릴 비트 세트드릴 비트 세트
줄 (손줄)줄 (손줄)
숫돌숫돌
7

Fit the knife and handle

Bolt the knife under the slot with an M5 screw, washer and nut as the set screw. Fit a hardwood handle to the bar's other end with epoxy.

이 단계의 재료:

기계 나사기계 나사1 개
평와셔평와셔1 개
육각 너트육각 너트1 개
단단한 나무 목심단단한 나무 목심1 개
2액형 에폭시2액형 에폭시1 개

필요한 도구:

멍키스패너멍키스패너
무선 드릴무선 드릴
드릴 비트 세트드릴 비트 세트
8

The patent drawing

US 50,011 drawing sheet, public domain (expired patent).
단계 8 - Image 1
9

Cut a round opening

Set the knife for the can and tighten it. Stand a sealed can on the kitchen scale, thrust the point through the top's centre, press the knife in and turn round; read the peak load, time it, and measure the hole.
단계 9 - Image 1

이 단계의 재료:

양철통양철통1 개

필요한 도구:

디지털 주방 저울디지털 주방 저울
스톱워치스톱워치
디지털 캘리퍼스 6인치디지털 캘리퍼스 6인치
가죽 작업 장갑가죽 작업 장갑
10

A point that tears out, a knife that slips

Crank-point can opener troubleshooting.

Flow

Loading...
11

History and honest limits

**Samuel D. Lecompte** of Leavenworth, Kansas, received US 50,011, dated 19 September 1865, for cans used for fruits, preserves and oysters. He did not limit himself to one knife shape, having adopted various styles. The patent was reissued on 4 February 1868 (No. 2,851). F. S. Wyman's 1868 patent names it as the circular opener he added a side knife to. **Honest limits.** A bolt and nut stand in for his set screw, and the knife is unhardened. Your loads and times are the result.

재료

8

필요 도구

17

이 블루프린트로 만드는 것

CC0 퍼블릭 도메인

이 블루프린트는 CC0로 공개되었습니다. 어떤 목적으로든 자유롭게 복사, 수정, 배포 및 사용할 수 있습니다.

제품 구매를 통해 메이커를 지원하세요. 판매자가 설정한 메이커 커미션 을 받거나, 이 블루프린트의 새로운 반복을 만들어 연결로 포함시킬 수 있습니다.

토론

(0)

로그인 하여 토론에 참여하세요

댓글 로딩 중...