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The Hinged-Hook Can Opener: A Lever That Hooks Under the Far Side
Martin

Créé par

Martin

6. octobre 2026NO
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The Hinged-Hook Can Opener: A Lever That Hooks Under the Far Side

The cover of a Lyman fruit can is hard to lift, and devices to ease it were not purely mechanical. S. O. Church of West Meriden, Connecticut, received US 61,161, dated 15 January 1867, for a can opener made of "a peculiarly formed lever": one end turned down and spread as a fulcrum on the cover's flange, the other a handle, and between them a hinged hook that takes the flange on the opposite side, set by a thumb on its arm, so that raising the handle draws the cover off. This rung works out the pull on the flange, then builds the lever and hook from flat bar and lifts a sealed jar lid with it.
Intermédiaire
About 3 hours

Consignes

1

Pull on the flange

Chargement du notebook Jupyter…
2

The sealed can before it

The embedded blueprint seals food by heat. Church's lever opens a sealed cover without prising at it.
3

Read US 61,161

"My invention, which fully overcomes the difficulty, is purely mechanical, and consists in a peculiarly formed lever, constructed so that one end forms the fulcrum to bear upon the upper side of the flange of the cover, while the other end forms a handle, and between which and the fulcrum is hinged a hook which takes hold beneath the flange of the cover upon the opposite side to the fulcrum, so that by raising the handle the cover is easily removed from the can."
4

Make the lever

Cut 200 mm of 25 × 3 mm flat bar. Bend the last 25 mm down at right angles and screw a 40 mm cross-piece of the bar under it: the spread fulcrum.

Matériaux pour cette étape :

Plat en acier douxPlat en acier doux1 pièce
Vis à métauxVis à métaux1 pièce
Écrou hexagonalÉcrou hexagonal1 pièce

Outils nécessaires :

Scie à métauxScie à métaux
Étau d'établiÉtau d'établi
MarteauMarteau
Perceuse sans filPerceuse sans fil
Jeu de foretsJeu de forets
Clé à moletteClé à molette
Gants de travail en cuirGants de travail en cuir
5

Make the hook

Cut 60 mm of the bar, narrow it to 20 mm, and bend its foot inward 10 mm as the flange. Bend a short arm up from its top for the thumb.

Matériaux pour cette étape :

Plat en acier douxPlat en acier doux1 pièce

Outils nécessaires :

Scie à métauxScie à métaux
Limes (lime à main)Limes (lime à main)
Étau d'établiÉtau d'établi
MarteauMarteau
6

Hinge the hook

Drill the hook and the lever 5 mm, 60 mm from the fulcrum, and join them with an M5 screw, two washers and a nut left just slack.

Matériaux pour cette étape :

Vis à métauxVis à métaux1 pièce
Rondelle plateRondelle plate1 pièce
Écrou hexagonalÉcrou hexagonal1 pièce

Outils nécessaires :

PointeauPointeau
Perceuse sans filPerceuse sans fil
Jeu de foretsJeu de forets
Jeu de tournevisJeu de tournevis
Clé à moletteClé à molette
Lunettes de sécurité transparentesLunettes de sécurité transparentes
7

The patent drawing

US 61,161 drawing sheet, public domain (expired patent).
Étape 7 - Image 1
8

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. Rest the fulcrum on one side of the lid, thumb the hook under the opposite edge, and lift the handle with the force meter; note the force.
Étape 8 - Image 1

Matériaux pour cette étape :

Bocaux de conserve (Mason)Bocaux de conserve (Mason)1 pièce
EauEau1 pièce

Outils nécessaires :

BouilloireBouilloire
Dynamomètre (peson à ressort)Dynamomètre (peson à ressort)
Gants résistants à la chaleurGants résistants à la chaleur
9

A hook that slips, binds or bends

Hinged-hook can opener troubleshooting.

Flow

Loading...
10

History and honest limits

**S. O. Church** of West Meriden, Connecticut, assignor to himself and S. S. Wilcox, received US 61,161, dated 15 January 1867. It was designed for the "Lyman Patent Fruit Can" but applies to other cans of similar construction. The hook is spread and curved, with a flange projecting inward; it uses the flange that is formed on the cover's lower edge when the cover is "struck up." His claim covers the lever with its fulcrum, the hook and the handle. **Honest limits.** A Mason jar's flat lid stands in for Lyman's cover, and screws for his pivot. Your forces are the result.

Matériaux

6

Outils requis

14

CC0 Domaine public

Ce blueprint est publié sous CC0. Vous êtes libre de copier, modifier, distribuer et utiliser ce travail pour tout usage, sans demander la permission.

Soutenez le Maker en achetant des produits via son Blueprint où il perçoit une Commission Maker définie par les Vendeurs, ou créez une nouvelle itération de ce Blueprint et incluez-le comme connexion dans votre propre Blueprint pour partager les revenus.

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