.~ Simulation of self-propelled object in liquid filled container (e.g., Cartesian diver)
DEFINITION
Classification: 472/67
Simulation of self-propelled object in liquid filled container (e.g., Cartesian diver):
(under subclass 57) Amusement device wherein the illusion created by the device involves an imitative representation of an article apparently moving under its own power through a fluid medium (other than a gas) that is held within a receptacle, whereby the actual power for the movement of the article is not apparent to a person observing the movement.
(1) Note. The devices included here are commonly called Cartesian divers. The movement of the object through the liquid is generally caused by (a) pressure changes applied to the liquid within the container, (b) pressure changes within the object, or (c) density changes of the object relative to the surrounding liquid.
SEE OR SEARCH CLASS
273, Amusement Devices: Games,
457+, for an amusement device which operates by use of the Cartesian diver principle and which is used to play a game.
446, Amusement Devices: Toys,
153+, for an aquatic toy device intended to be used by a child, and particularly subclasses 156+ for such an aquatic toy device in which a figure is apparently propelled through water by a propulsion means.
