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Bell-Crank Vibrating Beater Churn: Beaters Rocked on Hung Fulcrums by a Cranked Shaft

Clarkson Rhodes, Morrow, Ohio · Public domain (expired patent)

أنشأه

Martin

6. أكتوبر 2026

Bell-Crank Vibrating Beater Churn: Beaters Rocked on Hung Fulcrums by a Cranked Shaft

Rhodes improved "the common churn" by the way he worked and hung its beaters. Clarkson Rhodes of Morrow, Ohio, received US 8,959, dated 18 May 1852, for a churn box whose top has a convex recess for the cranks to pass, ventilated by a perforated tin plate over a hole "some 3/4 or an inch in diameter." A shaft bent into a double bell crank turns across the top; rods from the shaft carry the fulcrum on which the beaters vibrate, and rods from the cranks give them "an alternate up and down motion." The internal work lifts out with the top for cleaning. This rung works out the beaters' swing, then prints the beaters and fulcrum hangers, bends the cranked shaft, and makes butter.

متوسط

About 4 hours, plus printing

التعليمات

The beaters' swing

جارٍ تحميل دفتر Jupyter…

A double crank working the beaters before it

The embedded blueprint swings an upright dasher from a double crank. Rhodes rocks beaters on fulcrums hung from the cranked shaft itself.

Read US 8,959

"The shaft 1, 1, is turned by crank c, of which works the cranks 5, 5, and rods 3, 3, 3, 3 which gives the beaters or dashers 4, 4, 4, 4, an alternate up and down motion, and thereby causing an effectual churning of the milk."

Print the parts

Print four beaters (/uploads/blueprints/bell-crank-vibrating-beater-churn-beater.stl) and two fulcrum hangers (/uploads/blueprints/bell-crank-vibrating-beater-churn-fulcrum-hanger.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 cranked shaft

Bend a 6 mm steel rod into a shaft with two cranks of about 25 mm throw, pointing opposite ways, and a handle at one end. Lay it in notches in the ends of a food-safe box about 230 × 150 × 200 mm, under a plywood lid with a raised recess for the cranks and a small hole covered with perforated stainless sheet for air.

المواد لهذه الخطوة:

قضيب فولاذ طري1 قطعة

حافظة خزن بدرجة غذائية1 قطعة

لوح خشب رقائقي1 قطعة

لوح من فولاذ مقاوم للصدأ - 3041 قطعة

الأدوات المطلوبة:

مفتاح ربط قابل للضبط

منشار حديد

منشار تخريم

مقصّ صفائح

Hang the beaters

Hang each fulcrum hanger from the shaft beside a crank, on a loop of steel wire, and pin two beaters crossed on each hanger's lower hole. Join each beater's end to the nearer crank with a wire rod, eyes at both ends.

المواد لهذه الخطوة:

سلك فولاذ زنبركي1 قطعة

براغي آلية1 قطعة

صامولة سداسية1 قطعة

الأدوات المطلوبة:

مفتاح ربط قابل للضبط

طقم مفكات

The build in 3D

FreeCAD model of this build, not of the patent: the box with one side off to show the cranked shaft across the top, the rods hanging to the fulcrums, the crossed beaters and the crank rods.

ملف التصميمBLENDCC0 - Free

تنزيل النموذج

Crank and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres. Fit the lid and turn the handle steadily; time until the butter comes. 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

Beaters that jam, rods that bend

Bell-crank beater troubleshooting.

Flow

History and honest limits

**Clarkson Rhodes** of Morrow, Warren County, Ohio, received US 8,959, dated 18 May 1852 (the drawing sheet is lettered "G. Rhodes"; the specification gives Clarkson). He did not confine himself to the number or form of the dashers. He claimed the beaters hung by rods from the shaft on a fulcrum and worked by the rods and bell cranks. **Honest limits.** A food-safe box, steel rod and printed beaters stand in for his. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.