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Side-Knife Can Opener: Round Holes and Long Ones With One Tool
A circular opener makes round holes only, too small for a flat sardine box.
F. S. Wyman of Chicago received US 80,326, dated 28 July 1868, for a side knife rigidly attached to the adjustable plate of a circular can opener, "by means of which square and longitudinal openings may be made in fruit-cans with the same tool which is used to make round holes": a slotted plate with a pointed pivot, and a plate sliding in the slot carrying both the circular knife and the side knife, fixed by a set screw.
This rung compares round and long openings, then builds the plate, pivot and both knives and cuts each kind.
中级
About 3 hours
说明
1
1
Round against long
Round against long
正在加载 Jupyter 笔记本…
2
2
A circular opener before it
A circular opener before it
The embedded blueprint cuts round holes about a spike. Wyman adds a side knife to the sliding plate for straight cuts.
3
3
Read US 80,326
Read US 80,326
"A represents a slotted plate, fitted in a handle, B, and having a pointed pivot, E, used as an axis for the knife D, the same as in the patent of S. D. Lecompte, of September 19, 1865, and has a plate, F, arranged to run in the slot B' and support the knife D, held in place by a set-screw, H, when moved in said slot to suit the semi-diameter of the opening to be made."
4
4
Make the slotted plate
Make the slotted plate
Cut 120 mm of 25 × 3 mm flat bar. Saw and file a 5 mm slot 70 mm long in it, starting 20 mm from one end.
此步骤所需材料：
低碳钢扁钢1 个所需工具：
钢锯
台虎钳
充电式电钻
钻头套装
什锦锉套装
直尺5
5
Fit the pivot
Fit the pivot
Drill the plate's end 5 mm. File an M5 screw to a sharp point and fix it there with a nut, point down.
此步骤所需材料：
机螺钉1 个
六角螺母1 个所需工具：
充电式电钻钻头套装
锉刀（手用锉）
活动扳手6
6
Make the sliding plate and knives
Make the sliding plate and knives
Cut a 30 × 22 mm plate of flat bar. Cut a pointed circular knife and a straight side knife from 1 mm sheet; epoxy the first under its centre and the second along its side so it lies close to the slotted plate's edge.
此步骤所需材料：
低碳钢扁钢1 个
低碳钢板1 个
双组分环氧胶1 个所需工具：
钢锯
铁皮剪锉刀（手用锉）
磨刀石
透明安全眼镜7
7
Set screw and handle
Set screw and handle
Drill the sliding plate for an M5 screw through the slot with a washer and nut. Fit a hardwood handle with epoxy.
此步骤所需材料：
机螺钉1 个
平垫圈1 个六角螺母1 个
硬木销钉1 个双组分环氧胶1 个所需工具：
充电式电钻钻头套装活动扳手8
8
The patent drawing
The patent drawing
US 80,326 drawing sheet, public domain (expired patent).
9
9
Cut a round and a long opening
Cut a round and a long opening
Cut a round hole in one sealed can about the pivot. On a second, cut four straight sides with the side knife, rocking the handle along each; time both and measure the openings.
此步骤所需材料：
马口铁罐1 个所需工具：
秒表
6 英寸数显卡尺
皮革工作手套10
10
Knives that slip, bind or wander
Knives that slip, bind or wander
Side-knife can opener troubleshooting.
Flow
Loading...
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11
History and honest limits
History and honest limits
**F. S. Wyman** of Chicago received US 80,326, dated 28 July 1868. The plate and side knife should be one piece of steel, with a nib guiding it in the slot, the knife tempered to hold an edge. He did not claim the circular opener, patented by S. D. Lecompte on 19 September 1865, nor the side knife broadly, a similar device having been patented by S. P. Chapin on 17 July 1866; he claimed the side knife rigidly attached to the adjustable plate.
**Honest limits.** Epoxy stands in for his one-piece steel plate and knife, and nothing is tempered. Your times are the result.
材料
8- 1 个占位符
- 2 个占位符
- 2 个占位符
- 1 个占位符
- 2 个占位符
- 1 个占位符
- 1 个占位符
- 1 个占位符
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