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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

Nilikha ni

YourGrandma

6. Oktubre 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.
Baguhan
About 2 hours

Mga Tagubilin

1

Holding force against lever force

Naglo-load ng Jupyter notebook…
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.

Mga materyales para sa hakbang na ito:

Patag na Baras na Malambot na AseroPatag na Baras na Malambot na Asero1 piraso

Mga kailangang kasangkapan:

Lagaring Pang-metalLagaring Pang-metal
Bais sa Mesang PanggawaBais sa Mesang Panggawa
MartilyoMartilyo
RulerRuler
Pangmarkang Hindi NabuburaPangmarkang Hindi Nabubura
Guwantes na Katad PangtrabahoGuwantes na Katad Pangtrabaho
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.

Mga materyales para sa hakbang na ito:

Patag na Baras na Malambot na AseroPatag na Baras na Malambot na Asero1 piraso
Mga turnilyo ng makinaMga turnilyo ng makina1 piraso
Tuerkang HeksagonalTuerkang Heksagonal1 piraso

Mga kailangang kasangkapan:

Lagaring Pang-metalLagaring Pang-metal
PalihanPalihan
MartilyoMartilyo
Kikil (Kikil na Pangkamay)Kikil (Kikil na Pangkamay)
Pantudlok sa GitnaPantudlok sa Gitna
Walang-Kableng BarenaWalang-Kableng Barena
Hanay ng Talim ng BarenaHanay ng Talim ng Barena
Llaveng inglesLlaveng ingles
Malinaw na Salaming PangkaligtasanMalinaw na Salaming Pangkaligtasan
6

The patent drawing

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

Mga materyales para sa hakbang na ito:

Mga garapon sa pagbabote (Mason)Mga garapon sa pagbabote (Mason)1 piraso
TubigTubig1 piraso

Mga kailangang kasangkapan:

Takure sa kalanTakure sa kalan
Panukat ng Puwersa (Timbangang Spring)Panukat ng Puwersa (Timbangang Spring)
Guwantes na Matibay sa InitGuwantes na Matibay sa Init
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.

Mga Materyales

5

Mga Kinakailangang Kasangkapan

16

Ang blueprint na ito ay gumagawa ng

Thumbnail
Placeholder

Pambukas ng lata (pangkamay)

Free

6
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Kaugnay na Blueprint

Ang mga blueprint na ito ay nagbabahagi ng kaalaman — mga teknik, materyales, o prinsipyo

Mason Jar

Mason Jar

ni CharlieDE

CRAFTS

33
0
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

ni BomburUS

Pagkain

48
0
0
0
0
0
Warner Can Opener

Warner Can Opener

ni ForgeNO

CRAFTS

37
0
0
0
0
0

CC0 Pampublikong Domain

Ang blueprint na ito ay inilabas sa ilalim ng CC0. Malaya kang kumopya, magbago, mamahagi, at gumamit nang walang pahintulot.

Suportahan ang Maker sa pamamagitan ng pagbili ng mga produkto sa kanilang Blueprint Komisyon ng Maker itinakda ng mga Vendor, o lumikha ng bagong bersyon ng Blueprint na ito at isama bilang koneksyon sa iyong Blueprint upang ibahagi ang kita.

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