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1397
The Harpsichord
The Harpsichord is a simple machine invented by Herman Poll. It is classified as a lever and when force is placed on its keys the harpsichord's balance rail acts as a fulcrum on which the key pivots. -
1400
The trebuchet
The trebuchet was invented by Mariano Taccola. It can be identified as a lever. The counterweight creates the effort force, the load is the boulder or missle, and on the machine carriage between them, there is an axle that serves as a fulcrum, all of this does the work of launching a large object. -
The First Self-Propelled Wheelchair
The First Self-Propelled Wheelchair Was invented by Stephan Farfler. This simple machine is recognizable as a wheel and axle because it worked by turning the handles that are attached to the geared front wheel through the use of a system of cranks and cogwheels. -
The seed planter
Henry Blair, the second African-American man to receive a patent in the U.S., invented the seed planter or corn planter. It is classified as a lever. The seeds are dispersed through a chamber at the bottom then the rakes attached to the back drag over the seeds in order to cover them with soil. -
The Flat Bottomed Paper Bag Machine
This machine was invented by Margaret E. Knight. It is identifiable as a wheel and axle through the cogs required for the machine's function as it folds and cuts the paper. -
The Dough Kneader and Roller Machine
The Dough Kneader and Roller Machine was invented by Judy Woodford Reed, who was the first African-American woman to receive a patent in the U.S. The machine works by placing the dough into the machine to be mixed and worked by passing it through corrugated rollers. It then passes through a covered receiver before being flattened by a smooth roller. This machine is a wheel and axle simple machine. -
The Escalator
The Escalator was invented by Jesse W. Reno. This simple machine is an inclined plane and at the two ends of the escalator are two wheels and axles. Its function is to carry people from one floor to another above it with ease. -
The Zipper
The modern zipper was invented by Gideon Sundback. It was known as the separable fastener and was meant to replace buttons in clothing. Its is a wedge simple machine. -
The First Portable Hand-Held Drill
The First Portable Hand-Held Drill was invented by S. Duncan and Alonzo Decker. It to originate or enlarge circular holes in solid material. It was invented to originate or enlarge circular holes in solid material. Its is a screw simple machine. -
The Spinlaunch Slingshot
The Spinlaunch Slingshot was invented by the company Spinlaunch. It is intended to launch NASA payloads, satellites, etc. into space. It is currently the world's largest slingshot. It is identifiable as a wheel and axle due to the way the slingshot works by spinning rapidly on a wheel.