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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✨ Spin into Science with Style!

GREAT SCIENCE GIFT - Perfect for both kids and adults, making learning a shared experience.
STEM EDUCATIONAL TOY - Engage with physics in a fun, hands-on way that sparks curiosity.
VERSATILE DESK DECOR - Transform your workspace with a mesmerizing display of light and sound.
COMPACT FUNCTIONAL DESIGN - Fits seamlessly into any space, enhancing both aesthetics and focus.
COMPLETE SET FOR EXPLORATION - Includes everything you need to dive into the science of motion.

Euler’s Disk is a captivating science desk decor that combines art and education. This chrome-plated kinetic toy spins on a mirrored base, creating a stunning visual and auditory experience while demonstrating fundamental physics principles. Ideal for ages 8 and up, it serves as both a stylish desk accessory and an engaging STEM learning tool.

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Product Dimensions	25.4 x 24.13 x 3.81 cm; 916.26 g
Manufacturer recommended age	8 years and up
Item model number	791709
Educational Objective(s)	Physics Concept Development Skills
Language:	English
Number of Game Players	1
Number of Puzzle Pieces	11
Assembly Required	Yes
Batteries Required?	No
Batteries Included?	No
Material Type(s)	Steel
Remote Control Included?	No
Color	Multi-colored
ASIN	B000239E6Q

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

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