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The Lifting-Cutter Can Opener: A Diagonal Blade Cuts Under and Holds the Disk
William L. Hubbell, Brooklyn, New York · Public domain (expired patent)
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6. Oktoba 2026NO
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The Lifting-Cutter Can Opener: A Diagonal Blade Cuts Under and Holds the Disk

A can opener's knife can slip out of its cut, and the cut disk drops into the can. William L. Hubbell of Brooklyn, New York, received US 69,996, dated 22 October 1867, for a can opener made of a lever with a screw spike that fits any of several holes, to vary the size of the disk, and a cutter set diagonally "so as to cut under and lift up the said disk, and prevent the knife slipping out while in use," holding the disk until it is taken from the can. This rung works out which hole suits which can, then builds the lever, spike and diagonal cutter and opens a can.
Kati
About 3 hours

Maagizo

1

Spike hole against can size

Inapakia daftari la Jupyter…
2

A turning cutter before it

The embedded blueprint cuts round a can with a wheel and a fixed cutter. Hubbell turns a lever round a spike and inclines the cutter so it lifts what it cuts.
3

Read US 69,996

"The cutter d is set into a recess, formed by grooves, on the edges of the lever a, at the curved part b, so that one edge of the cutter projects below the under side of the lever at an inclination, as shown, so that the cutter is prevented from rising by its being below, and inclining inwards under the edge of the disk that is being cut out by revolving either the can or the opener."
4

Make the lever

Cut 180 mm of 25 × 3 mm flat bar and bend the last 20 mm down at about 40° in the vice. Drill and tap three M5 holes 25, 30 and 35 mm from the bend's foot.

Vifaa kwa hatua hii:

Pau Bapa la Chuma LainiPau Bapa la Chuma Laini1 kipande

Zana zinazohitajika:

Msumeno wa chumaMsumeno wa chuma
Kibano cha meza ya kaziKibano cha meza ya kazi
NyundoNyundo
Kigwe cha KatikatiKigwe cha Katikati
Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
Seti ya kukata nyuzi za skrubuSeti ya kukata nyuzi za skrubu
RulaRula
5

Slot the bent end

Saw a slot 1 mm wide and 12 mm deep across the bent end at 25° to the bar with the hacksaw.

Zana zinazohitajika:

Msumeno wa chumaMsumeno wa chuma
Kibano cha meza ya kaziKibano cha meza ya kazi
Seti ya tupa ndogoSeti ya tupa ndogo
6

Make and set the cutter

Cut a 16 × 18 mm cutter from 1 mm steel sheet and file both short ends to rounded cutting edges. Set it in the slot with epoxy so one end projects 5 mm below the bar, inclined inward.

Vifaa kwa hatua hii:

Bati la Chuma LainiBati la Chuma Laini1 kipande
Epoksi ya Sehemu MbiliEpoksi ya Sehemu Mbili1 kipande

Zana zinazohitajika:

Mkasi wa batiMkasi wa bati
Tupa (Tupa ya Mkono)Tupa (Tupa ya Mkono)
Jiwe la kunoaJiwe la kunoa
Miwani ya usalama iliyo waziMiwani ya usalama iliyo wazi
7

Make the spike

File the end of an M5 screw to a long taper point. Screw it into the hole that suits the can.

Vifaa kwa hatua hii:

Skrubu za mashineSkrubu za mashine1 kipande

Zana zinazohitajika:

Kibano cha meza ya kaziKibano cha meza ya kazi
Tupa (Tupa ya Mkono)Tupa (Tupa ya Mkono)
8

The patent drawing

US 69,996 drawing sheet, public domain (expired patent).
Hatua 8 - Image 1
9

Open a can and lift the disk

Stand a sealed can on the kitchen scale. Thrust the spike into the top's centre, press the cutter through and turn the lever round; read the peak load and time it. Lift the opener and see whether the disk comes with it.
Hatua 9 - Image 1

Vifaa kwa hatua hii:

Kopo la batiKopo la bati1 kipande

Zana zinazohitajika:

Mizani ya dijitali ya jikoniMizani ya dijitali ya jikoni
Saa ya kupima mudaSaa ya kupima muda
Kipima-unene cha dijitali cha inchi 6Kipima-unene cha dijitali cha inchi 6
Glavu za Kazi za NgoziGlavu za Kazi za Ngozi
10

A cutter that rides up, slips or drops the disk

Lifting-cutter can opener troubleshooting.

Flow

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11

History and honest limits

**William L. Hubbell** of Brooklyn, New York, signed his specification on 16 August 1867; US 69,996 is dated 22 October 1867. He wrote that earlier openers with semicircular knives, or tools to perforate and raise the edges, were costly and some were liable to slip. The cutter's edge is rounded outwardly so as not to draw the spike out, and both ends are shaped alike so it can be changed end for end. **Honest limits.** Epoxy in a sawn slot stands in for his grooved recess, and the cutter is unhardened. Your loads and times are the result.

Vifaa

5

Zana Zinazohitajika

17

Mchoro huu unatengeneza

Thumbnail
Kishikilia nafasi

Kifungua mkebe (cha mkono)

Free

9
0

Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

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