예술
뷰티 및 웰니스
공예
문화 및 역사
엔터테인먼트
환경
음식 및 음료
역공학
과학
스포츠
기술
웨어러블
Planetary Stand Mixer
The rotary egg beater already published spins two blades on fixed axes - so the cook must keep moving it, and a stiff dough stalls it. Herbert Johnston, an engineer at Hobart, watched a baker turning dough with a spoon and built the next rung: the beater turns on its own axis while a carrier walks it round the bowl, so the blade sweeps everywhere without the bowl or the beater being moved by hand.
**US 1,264,128**, "Mixing-machine", Johnston and Rataiczak, assigned to Hobart Manufacturing, filed 1. March 1915, granted 23. April 1918. Hobart's big bakery machines came first; the domestic KitchenAid followed in 1919.
**You build the motion, not the appliance**: a planetary gear set with a pen for a blade, drawing its own path on paper, and a coverage measurement against a fixed-axis beater.
중급
3 hours
안내
1
1
Read the gear set
Read the gear set
Count the teeth on the ring and on one planet. Measure the ring's inside diameter and a planet's outside diameter with the caliper; the pitch radii are close to half of each.
이 단계의 재료:
유성 기어 세트(강철)1 세트필요한 도구:
디지털 캘리퍼스 6인치2
2
Mount it over paper
Mount it over paper
Screw the ring gear flat to a plywood board. Tape graph paper under it, centred. Fit one planet so it rolls inside the ring.
이 단계의 재료:
합판1 개
모눈종이1 장
마스킹 테이프1 롤필요한 도구:
손톱(핸드소)
무선 드릴3
3
Give the planet a blade
Give the planet a blade
Glue a short dowel upright in a hole in the planet, four-fifths of the way out from its centre, and tape a marker to it so the tip just touches the paper.
이 단계의 재료:
목재 다월봉1 개
유성 매직1 개필요한 도구:
글루건4
4
Walk it round
Walk it round
Push the planet slowly round the inside of the ring, letting it roll rather than slide, until the drawn pattern closes on itself. Then draw, for comparison, the circle the same blade makes when the planet is held in one place and simply spun.
필요한 도구:
자5
5
The same in dough
The same in dough
Optional but convincing: put 200 g of flour and 120 ml of water in a bowl and stir with a fixed-axis beater without moving it. Note the untouched ring of dry flour at the wall - the reason for the carrier.
이 단계의 재료:
중력분200 g필요한 도구:
큰 유리 볼
디지털 주방 저울6
6
Path, coverage and gear ratio
Path, coverage and gear ratio
Jupyter 노트북 불러오는 중…
7
7
History & Context
History & Context
**What the patent specifies:** a mixing machine in which the beater rotates about its own axis while being carried bodily around the bowl. **Modern build (derived):** a planetary gear set and a pen, which draws the path the blade takes.
The 20-gallon Hobart was standard in large bakeries by 1915; the domestic version arrived in 1919 and the layout has not changed since. Its limits: the gearbox must take dough loads, the bowl must match the beater's reach, and a blade that reaches the wall will also scrape a bowl that is out of true.
재료
7- 1 세트플레이스홀더
- 1 개플레이스홀더
- 1 장플레이스홀더
- 1 롤플레이스홀더
- 1 개플레이스홀더
- 1 개플레이스홀더
- 200 g플레이스홀더
CC0 퍼블릭 도메인
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