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The Guarded Orange Knife: A Guard That Sets the Cut to the Peel, a Nut-Pick at the Other End

Harry M. Hamrick, Philadelphia, Pennsylvania · Public domain (expired patent)

أنشأه

TheChef

30. سبتمبر 2026

The Guarded Orange Knife: A Guard That Sets the Cut to the Peel, a Nut-Pick at the Other End

Peeling an orange with a knife cuts into the fruit and lets the juice run, and prising the peel off takes the fingernails. Harry M. Hamrick of Philadelphia received US 461,914, dated 27 October 1891, for "a simple implement especially designed for cutting the peel of oranges, and adapted, also, for use as a nut-pick, and also to the removal of the peel from oranges after the same has been cut": a handle with a blade at one end, preferably with two cutting edges, beside a convex shield that regulates the depth of the cut to the thickness of the peel, and at the other end a pick curved at its outer end to go between the cut peel and the fruit, or to pick nuts. This rung works out the peel's share and the depth to set, then files the blade and guard, fits a pick at the other end, and peels oranges and picks walnuts.

متوسط

About 3 hours

التعليمات

The peel's depth

جارٍ تحميل دفتر Jupyter…

The nut-pick before it

The embedded blueprint makes a one-piece nut pick. Hamrick puts a curved pick on the end of an orange knife, for the peel or for nuts.

Read US 461,914

"The object of my invention is the production of a simple implement especially designed for cutting the peel of oranges, and adapted, also, for use as a nut-pick, and also to the removal of the peel from oranges after the same has been cut; and the invention consists, essentially, in providing a blade which preferably should have two cutting-edges with a shield or guard, so as to regulate the depth of the cut" "The nut-pick or peel-remover, as will be seen from the drawings, is preferably curved at its outer end, as it can thus be more easily inserted between the cut sections of the peel of the orange when used for that purpose, while at the same time it is thus better adapted for use as a nut-pick."

Make the knife and peel an orange

**Handle.** Turn or rasp a 12 cm hardwood handle and drill both ends. **Guard.** File a small disc of stainless steel sheet with a convex outer face, drill it in the middle, and fit it on one end of the handle as B. **Blade.** Cut a short blade from stainless steel sheet, sharpen both edges and the point, and set it through the guard into the handle so its tip stands about 5 mm past the guard's face. **Pick.** File a 5 mm stainless rod to a point, curve its last centimetre, and set it in the other end. **Test.** Score an orange's peel in six segments, the guard riding on the peel, and lift the sections off with the pick. Check whether any cut reached the fruit. Crack walnuts and pick out their meat.

المواد لهذه الخطوة:

عصا خشب صلب للمقابض1 قطعة

لوح من فولاذ مقاوم للصدأ1 قطعة

قضيب فولاذ طري0.1 متر

إيبوكسي ثنائي المكوّن1 قطعة

برتقال2 قطع

جوز4 قطع

الأدوات المطلوبة:

مبرد خشن

مثقاب لاسلكي

طقم لقم ثقب

مقصّ صفائح

مبارد (مبرد يدوي)

حجر السنّ

ملزمة منضدة

زرادية مستديرة الفك

قدمة رقمية 6 بوصات

قفّازات عمل جلدية

A knife that cuts too deep, too shallow or slips

Guarded orange knife troubleshooting.

Flow

History and honest limits

**Harry M. Hamrick** of Philadelphia, Pennsylvania, filed US 461,914 on 9 March 1891; it is dated 27 October 1891. His drawing shows the handle A, the guard B convex on its outer face, the knife C and the nut-pick and peel-remover D. His claims cover the handle, guard, knife and pick combined, and the handle, knife and guard. **Honest limits.** A hand-filed stainless blade and pick in a hardwood handle stand in for his made implement. The notebook treats the orange as a sphere with even peel; its values are examples. Your peeled oranges are the result.