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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)
Forge

Creato da

Forge

6. ottobre 2026NO
36
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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.
Intermedio
About 3 hours

Istruzioni

1

Spike hole against can size

Caricamento del notebook 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.

Materiali per questo passaggio:

Piatto di acciaio dolcePiatto di acciaio dolce1 pezzo

Strumenti necessari:

Seghetto per metalliSeghetto per metalli
Morsa da bancoMorsa da banco
MartelloMartello
Bulino da centroBulino da centro
Trapano a batteriaTrapano a batteria
Serie di punte da trapanoSerie di punte da trapano
Serie di maschi e filiereSerie di maschi e filiere
RighelloRighello
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.

Strumenti necessari:

Seghetto per metalliSeghetto per metalli
Morsa da bancoMorsa da banco
Set di lime ad agoSet di lime ad ago
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.

Materiali per questo passaggio:

Lamiera di acciaio dolceLamiera di acciaio dolce1 pezzo
Resina epossidica bicomponenteResina epossidica bicomponente1 pezzo

Strumenti necessari:

Cesoie da lattoniereCesoie da lattoniere
Lime (lima a mano)Lime (lima a mano)
Pietra per affilarePietra per affilare
Occhiali di sicurezza trasparentiOcchiali di sicurezza trasparenti
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.

Materiali per questo passaggio:

Viti da metalloViti da metallo1 pezzo

Strumenti necessari:

Morsa da bancoMorsa da banco
Lime (lima a mano)Lime (lima a mano)
8

The patent drawing

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

Materiali per questo passaggio:

Barattolo di lattaBarattolo di latta1 pezzo

Strumenti necessari:

Bilancia digitale da cucinaBilancia digitale da cucina
CronometroCronometro
Calibro digitale da 6 polliciCalibro digitale da 6 pollici
Guanti da lavoro in pelleGuanti da lavoro in pelle
10

A cutter that rides up, slips or drops the disk

Lifting-cutter can opener troubleshooting.

Flow

Loading...
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.

Materiali

5

Strumenti richiesti

17

Questo progetto realizza

Thumbnail
Segnaposto

Apriscatole manuale

Free

8
0

Blueprint correlati

Questi blueprint condividono conoscenze — tecniche, materiali o principi

The Shouldered-Blade Can Opener: The Shoulders Are the Fulcrum

The Shouldered-Blade Can Opener: The Shoulders Are the Fulcrum

di ForgeNO

Lavorazione dei metalli

31
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0
0
0
0
The Revolving Shear Can Opener: A Wheel and a Fixed Cutter That Cut Tin Like Shears

The Revolving Shear Can Opener: A Wheel and a Fixed Cutter That Cut Tin Like Shears

di ForgeNO

Lavorazione dei metalli

27
0
0
0
0
0
Warner Can Opener

Warner Can Opener

di ForgeNO

MESTIERE

40
0
0
0
0
0

CC0 Pubblico dominio

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