If the disc spins faster the longer it goes how do you stop it?

It spins SLOWER the longer it goes (Precession). It sounds like it is spinning faster due to more of the disk laying down flat before it comes to rest.

Does anyone have a video of this in action?

Here is a YouTube video of a Euler's Disk https://www.youtube.com/watch?v=rFtYzVJcWyA

How do you patent a steel disk?

A design patent on the visual design elements is the most likely answer. A utility patent on details of the disk that optimize its action (such as a specific combination of edge finish, weight distributions, etc. is remotely possible, but IMHO, very unlikely.. The third type of patent is.a plant patent, which is what Monsanto (not Moderna) gets,. I’m pretty sure it refers to a design patent.

what's disc diameter?

Hello, Thank you for your interest in our products! The mirrored base is 9" diameter, chrome plated steel disk is 3" diameter x .5" thick. Thank you, Customer Service, Office Playground

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Toysmith Euler’s Disk – Create A Hypnotic Display of Light & Sound- Science Desk Decor for Home and Office – Physics Toys for Adults & Kids 8+

Product ID: 264040499

Details

Age range (description)
Youth
Brand
Toysmith
Item dimensions L x W x H
25.4 x 24.1 x
Size
9.5 inches
Theme
physics

✨9 magnetized holographic foils for customizable visuals

🌀3-inch chrome disk spins hypnotically

🪞9-inch concave mirror base for dazzling reflections

€ 136.11

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Description

🌀 Spin into the future of desk décor—where science meets mesmerizing style!

STEM POWERED LEARNING - Explore gravity, friction, and motion principles hands-on—perfect for curious minds 8+.
MESMERIZING KINETIC ART - Transform your desk with a hypnotic spin and sonic hum that captivates and calms.
COMPACT STYLISH DESIGN - Chrome-plated elegance fits perfectly on any desk, blending science with modern décor.
COMPLETE SCIENCE EXPERIENCE - Includes 6 disks, mirror base, foils, and instructions—everything you need to impress and educate.
CUSTOMIZABLE VISUAL EFFECTS - Switch between 9 magnetized foils to create unique holographic light shows every time.

Toysmith Euler’s Disk is a chrome-plated, 3-inch kinetic desk toy spinning on a 9-inch concave mirror base, producing sonic hums and holographic light displays. Designed for ages 8+, it includes 6 disks, 9 magnetized foils, and instructions, making it a perfect STEM educational tool and stylish office or home décor piece.

Specifications

ASIN	B000239E6Q
Age Range Description	Youth
Best Sellers Rank	#60,913 in Toys ( See Top 100 in Toys ) #815 in Educational Science Kits
Brand Name	Toysmith
Color	Multi-colored
Customer Reviews	4.7 4.7 out of 5 stars (2,455)
Educational Objective	Physics Concept Development Skills
Global Trade Identification Number	00051168017096
Included Components	mirror base,9 pieces of magnetized holographic foil, instructions
Indoor Outdoor Usage	Indoor
Is Assembly Required	Yes
Item Dimensions	25.4 x 24.1 x 3.8 centimeters
Item Type Name	Toysmith Euler's Disk Science Kit
Item Weight	2.02 Pounds
Manufacturer	Toysmith
Manufacturer Part Number	791709
Manufacturer recommended age	8 years and up
Material Type	Steel
Model Number	791709
Number of Players	1
Operation Mode	Manual
Power Source	manual winding
Set Name	Euler's Disk Science Kit
Size	9.5 inches
Supported Battery Types	No batteries required
Theme	physics
UPC	793631620531 730309080280 736126283583 885167238509 051168017096
Unit Count	1 Count

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