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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

Dibuat oleh

YourGrandma

6. Oktober 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.
Pemula
About 2 hours

Instruksi

1

Holding force against lever force

Memuat notebook 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.

Material untuk langkah ini:

Besi Strip Baja LunakBesi Strip Baja Lunak1 buah

Alat yang dibutuhkan:

Gergaji BesiGergaji Besi
Ragum MejaRagum Meja
PaluPalu
PenggarisPenggaris
Spidol PermanenSpidol Permanen
Sarung Tangan Kerja KulitSarung Tangan Kerja Kulit
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.

Material untuk langkah ini:

Besi Strip Baja LunakBesi Strip Baja Lunak1 buah
Sekrup mesinSekrup mesin1 buah
Mur Segi EnamMur Segi Enam1 buah

Alat yang dibutuhkan:

Gergaji BesiGergaji Besi
Landasan TempaLandasan Tempa
PaluPalu
Kikir (Kikir Tangan)Kikir (Kikir Tangan)
PenitikPenitik
Bor Tanpa KabelBor Tanpa Kabel
Set Mata BorSet Mata Bor
Kunci InggrisKunci Inggris
Kacamata Pengaman BeningKacamata Pengaman Bening
6

The patent drawing

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

Material untuk langkah ini:

Stoples pengalengan (Mason)Stoples pengalengan (Mason)1 buah
AirAir1 buah

Alat yang dibutuhkan:

Ketel komporKetel kompor
Neraca Pegas (Pengukur Gaya)Neraca Pegas (Pengukur Gaya)
Sarung Tangan Tahan PanasSarung Tangan Tahan Panas
8

An opener that slips, bends or scratches

Lid-lifting can opener troubleshooting.

Flow

Loading...
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.

Bahan

5

Alat yang Diperlukan

16

Blueprint terkait

Blueprint ini berbagi pengetahuan — teknik, bahan, atau prinsip

Mason Jar

Mason Jar

oleh CharlieDE

KERAJINAN

33
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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

oleh BomburUS

Makanan

48
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0
0
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Warner Can Opener

Warner Can Opener

oleh ForgeNO

KERAJINAN

36
0
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0
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0

CC0 Domain Publik

Cetak biru ini dirilis di bawah CC0. Anda bebas untuk menyalin, memodifikasi, mendistribusikan, dan menggunakan karya ini untuk tujuan apa pun, termasuk komersial, tanpa meminta izin.

Dukung Maker dengan membeli produk melalui Cetak Biru mereka di mana mereka mendapatkan Komisi Pembuat yang ditetapkan oleh Penjual, atau buat iterasi baru dari Cetak Biru ini dan masukkan sebagai koneksi di milik Anda sendiri.

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