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Two-Frame Percussion Dasher Churn: The Upper Frame Strikes the Lower at Every Down Stroke

W. H. Burnham and B. Hibbard, Cortland, New York · Public domain (expired patent)

أنشأه

Spindle

7. أكتوبر 2026

Two-Frame Percussion Dasher Churn: The Upper Frame Strikes the Lower at Every Down Stroke

W. H. Burnham and B. Hibbard of Cortland, New York, received US 15,412, dated 29 July 1856, for a dasher of two slatted frames loosely joined: at each down stroke the lower frame meets the bottom and the upper frame is "driven violently in the contact with the lower frame," forcing the cream up between the bars in thin sheets. This rung prints the two frames, key and wedge, builds the churn and lever, and makes butter.

متوسط

About 4 hours, plus printing

التعليمات

The slack between the frames

جارٍ تحميل دفتر Jupyter…

Slats that close on the cream before it

Clement folds a slatted box; Burnham and Hibbard strike one frame on another.

Read US 15,412

"Then when the dasher is forced downward, the lower frame of the dasher will be first arrested by the bottom of the box, which will cause the upper frame of the dasher to be driven violently in the contact with the lower frame thereof and by so doing, will cause the cream which is carried down before it, to be driven with percussive force into the spaces between the bars of the lower frame and thence up in thin sheets."

Print the parts

Print the upper frame (/uploads/blueprints/two-frame-percussion-dasher-churn-upper-frame.stl), the lower frame (/uploads/blueprints/two-frame-percussion-dasher-churn-lower-frame.stl) and the key and wedge (/uploads/blueprints/two-frame-percussion-dasher-churn-key-and-wedge.stl). Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

المواد لهذه الخطوة:

خيط PETG1 قطعة

الأدوات المطلوبة:

طابعة ثلاثية الأبعاد بالخيط (FDM)

The dasher

Glue a 12 mm square hardwood handle into the lower frame and two 6 × 12 mm laths into the upper frame's sockets. Cut a slot 40 mm long down both laths. Set the handle between the laths and push the key through a hole in the handle and through the slots.

المواد لهذه الخطوة:

أوتاد من خشب صلب1 قطعة

غراء خشب1 قطعة

الأدوات المطلوبة:

منشار يدوي

مثقاب لاسلكي

طقم لقم ثقب

Box and lever

Use a rectangular food-grade container about 210 by 150 mm on a pine platform. Hinge a pine upright at one end of the platform and pin a pine lever to its top; pin the two laths to the lever above the box.

المواد لهذه الخطوة:

حافظة خزن بدرجة غذائية1 قطعة

لوح صنوبر1 قطعة

قضيب فولاذ طري1 قطعة

برغي خشب #8 × 1 بوصة1 قطعة

الأدوات المطلوبة:

منشار يدوي

مثقاب لاسلكي

طقم مفكات

The build in 3D

FreeCAD model of this build: the box cut away to show the two slatted frames, the double handles and key, and the lever on its oscillating upright.

ملف التصميمBLENDCC0 - Free

تنزيل النموذج

Churn, then gather

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres. Work the lever steadily; time until the butter comes. Push the wedge into the slots above the handle to hold the frames apart, and work on slowly to gather the butter. Pour off the buttermilk, add cold water, churn a little and pour off again until it runs clear; work in a pinch of salt and weigh the butter.

المواد لهذه الخطوة:

قشدة كاملة الدسم2000 مل

ملح بحري خشن1 قطعة

ماء1 قطعة

الأدوات المطلوبة:

مقياس حرارة بمجس يبقى داخل الطعام

ساعة إيقاف

ميزان مطبخ رقمي

وعاء خلط كبير من فولاذ مقاوم للصدأ

Troubleshooting

Two-frame dasher troubleshooting.

Flow

History and honest limits

**W. H. Burnham and B. Hibbard** of Cortland village, Cortland County, New York, US 15,412, 29 July 1856, signed 5 June 1856; the drawing reads "Reciprocating Churn." They claimed the dasher of two independent frames combined with each other and the lever. A container, pine and printed parts stand in for theirs. FDM prints hold food in their layer lines, so wash well and replace when worn.