A “gravity battery” is a type of machine that creates and stores energy through raising a mass and allowing it to fall. This type of machine explores the Laws of Thermodynamics, the first of which describes how energy is not created or destroyed, but is transferred from one form into another form. Here, gravitational potential energy is transferred into kinetic energy, which is then transformed into light.
Ug= mgh illustrates these principles through the controlled fall of a 200 lb cube of marble, which is used to power LED lights on a table lamp. The marble block is suspended from a pulley 10’ high. Once the marble begins its descent, it will drive a custom-machined aluminum gear set, which turns a small dynamo motor that powers the table lamp. For every rotation of the first gear, the motor turns 146 times.
The title Ug= mgh describes the formula at work. The Ug in the equation refers to gravitational potential energy. When being lifted, the marble cube is gaining gravitational potential energy, since work is required to elevate the object against gravity. At its peak, the object possesses its maximum gravitational potential energy. Then mgh is the relationship between the object’s mass, its acceleration due to gravity, and the height it falls from. The gravitational potential energy is converted into kinetic energy as the mass is raised and then through its fall.
It takes the marble block roughly 10 to 14 minutes to fall completely, depending on the motor’s distance from the final gear. At which point, the weight will need to be cranked back up to the top again. Mechanical advantage of the crank allows the user to easily reset the machine.
The induction tube light uses a magnetic field to transfer electrical current from the cube-shaped base to a regular 6’ fluorescent bulb. When the bulb is inserted into the base it presses a switch that activates a circuit inside. The current is transferred to the bulb, exciting the gases inside. The bulb will continue to emit light when lifted several inches away.
The Induction Tube Light comes with a 6-foot and a 17-inch bulb for floor or desk lighting. The base is made of milled solid steel and plated in black chrome.
Taking inspiration from beaver pelt stretching techniques, this light diffuser reflects LEDs off of a piece of stretched foil leather. The base and stem of the light is designed to disappear in order to display the leather reflector.
The Coil Lamp, a lightweight task lamp that draws power from either of Apple’s first generation MagSafe adapters, is constructed from aluminum and copper-plated components. LEDs contained within the lamp’s head emit a warm, directional light, which allows it to be used in either professional or domestic environments.
The Fresnel Pendants get their name from the light-diffusing lens inside of the fixture. The lights feature aluminum, brass, and glass components, and are available in three sizes. A powder-coated aluminum drum is suspended from a brass “T-Bar.” The fixture’s cord is decoratively knotted around the brass bar.
The Droog Light takes inspiration from the way guitar pedals are activated. Each light is turned on through pressing a switch like a guitar stomp box. Rubber 12-volt truck lights plug into a power box using guitar jacks. Lights can be placed anywhere using metal pucks and magnets. Available in 3, 5 or larger (upon request).
DIMENSIONS (H x W x D)
4″ x 2″ x 2″ (100mm x 50mm x 50mm)