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The Lid-Lifting Can Opener: One Lip Presses Down While the Other Lifts
O. J. Livermore, Worcester, Massachusetts · Public domain (expired patent)
YourGrandma

Imeundwa na

YourGrandma

6. Oktoba 2026IS
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The Lid-Lifting Can Opener: One Lip Presses Down While the Other Lifts

A fruit can's tin cover, pressed onto a rubber ring, can stick so hard that prising it off hurts the fingers. O. J. Livermore of Worcester, Massachusetts, received US 55,878, dated 26 June 1866, for a can opener for "Lyman's patent can": a handle, a part that passes over the cover with an inclined lip below it, and a curved piece whose angular edge goes under the cover's far side; raising the handle presses one side down and lifts the other. This rung compares the force holding a vacuum-sealed lid with what the lever gives, then bends the opener from flat bar and lifts a sealed jar lid with it.
Mwanzo
About 2 hours

Maagizo

1

Holding force against lever force

Inapakia daftari la Jupyter…
2

A sealed jar before it

The embedded blueprint seals food in a screw-top jar. Livermore's lever lifts a pressed-on cover of the same kind without fingernails.
3

Read US 55,878

"In trying to remove the cover under such circumstances persons without proper conveniences at hand for the purpose often injure their fingers and nails." "Handle B is now raised, which causes the inclined lip D to force the cover down and toward the can on that side, while the angular lip a elevates the other side of the cover, as shown in red lines."
4

Bend the head

Cut 220 mm of 25 × 3 mm flat bar. Bend the last 15 mm down at about 60° in the vice for the inclined lip, 30 mm from it bend the bar level again: the part over the cover.

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
RulaRula
Kalamu ya Wino wa KudumuKalamu ya Wino wa Kudumu
Glavu za Kazi za NgoziGlavu za Kazi za Ngozi
5

Add the lifting piece

Cut 60 mm of the bar, curve it on the anvil, and file one end to a sharp angular edge. Drill both pieces and screw the curved one under the bar, its edge 70 mm from the lip.

Vifaa kwa hatua hii:

Pau Bapa la Chuma LainiPau Bapa la Chuma Laini1 kipande
Skrubu za mashineSkrubu za mashine1 kipande
Nati ya pembe sitaNati ya pembe sita1 kipande

Zana zinazohitajika:

Msumeno wa chumaMsumeno wa chuma
FuaweFuawe
NyundoNyundo
Tupa (Tupa ya Mkono)Tupa (Tupa ya Mkono)
Kigwe cha KatikatiKigwe cha Katikati
Kekee cha BetriKekee cha Betri
Seti ya vichimbuziSeti ya vichimbuzi
Spana inayoweza kurekebishwaSpana inayoweza kurekebishwa
Miwani ya usalama iliyo waziMiwani ya usalama iliyo wazi
6

The patent drawing

US 55,878 drawing sheet, public domain (expired patent).
Hatua 6 - Image 1
7

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. Try to lift the lid with the force meter's hook under its edge; note the force. Then set the opener on it and lift with the meter on the handle's end.
Hatua 7 - Image 1

Vifaa kwa hatua hii:

Mitungi ya kuhifadhia chakula (Mason)Mitungi ya kuhifadhia chakula (Mason)1 kipande
MajiMaji1 kipande

Zana zinazohitajika:

Birika la jikoBirika la jiko
Kipima-nguvu (mizani ya springi)Kipima-nguvu (mizani ya springi)
Glavu Zinazostahimili JotoGlavu Zinazostahimili Joto
8

An opener that slips, bends or scratches

Lid-lifting can opener troubleshooting.

Flow

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9

History and honest limits

**O. J. Livermore** of Worcester, Massachusetts, assignor to himself and Clark, Sawyer & Co., received US 55,878, dated 26 June 1866. Lyman's cover fits over a rubber packing ring in a groove on the can; a groove lets a pin admit air, but the cover often adheres by corrosion and other causes. His opener works even before the air is admitted, though more easily after. **Honest limits.** A cooled Mason jar stands in for Lyman's can, and two screwed pieces for his one-piece tool. Your forces are the result.

Vifaa

5

Zana Zinazohitajika

16

Mchoro huu unatengeneza

Thumbnail
Kishikilia nafasi

Kifungua mkebe (cha mkono)

Free

9
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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Mason Jar

Mason Jar

na CharlieDE

UJANJA

36
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0
0
0
0
Preserving Food by Canning — Appert's Heat-and-Seal Method That Fed Armies

Preserving Food by Canning — Appert's Heat-and-Seal Method That Fed Armies

na BomburUS

Chakula

48
0
0
0
0
0
Warner Can Opener

Warner Can Opener

na ForgeNO

UJANJA

41
0
0
0
0
0

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