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This chair features a mechanical system that spins an idler gear while the user is rocking back and forth to propel a fan located above the users headrest

Automatic Fan for Rocking Chair

This chair features a mechanical system that spins an idler gear while the user is rocking back and…

Griffith's Propeller, a common form of screw-propeller.

Griffith's Propeller

Griffith's Propeller, a common form of screw-propeller.

Thornycroft's propeller, a common form of screw propeller.

Thornycroft's propeller

Thornycroft's propeller, a common form of screw propeller.

A motor vehicle is a wheeled vehicle whose propulsion is provided by an engine or motor. The internal combustion engine is the most common motor choice, although electric motors or other types are sometimes used. Motor vehicles or road vehicles typically run on public roads. The rules of the road are laws or practices which all road users must obey; many relate specifically to motor vehicles or subtypes of them.

Motored Vehicle

A motor vehicle is a wheeled vehicle whose propulsion is provided by an engine or motor. The internal…

A marine velocipede is a form of waterborne transport, primarily for recreational use, powered through the use of pedals. This transport works by utilizing the pedaling motion to rotate a paddle wheel similar to the form of marine propulsion used in the earlier paddle steamers.

Marine Velocipede

A marine velocipede is a form of waterborne transport, primarily for recreational use, powered through…