Energy & Power - Overview
The Museum's collections on energy and power illuminate the role of fire, steam, wind, water, electricity, and the atom in the nation's history. The artifacts include wood-burning stoves, water turbines, and windmills, as well as steam, gas, and diesel engines. Oil-exploration and coal-mining equipment form part of these collections, along with a computer that controlled a power plant and even bubble chambers—a tool of physicists to study protons, electrons, and other charged particles.
A special strength of the collections lies in objects related to the history of electrical power, including generators, batteries, cables, transformers, and early photovoltaic cells. A group of Thomas Edison's earliest light bulbs are a precious treasure. Hundreds of other objects represent the innumerable uses of electricity, from streetlights and railway signals to microwave ovens and satellite equipment.
"Energy & Power - Overview" showing 29 items.
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Experimental Compact Fluorescent Lamp
- Description
- Ordinary lamps give good quality light and can be designed for all manner of special tasks. However, they waste a tremendous amount of energy in the form of heat. The steep rise in energy prices during the 1970s spurred a burst of invention aimed at developing lamps that gave more lumens per watt—the lighting equivalent of miles per gallon in cars.
- Much of the invention took place in the laboratories of major lighting companies like General Electric and Sylvania. But inventors outside the corporate labs also offered ideas and new devices. One such inventor was Donald Hollister of California. A UCLA graduate with experience in plasma physics, Hollister patented a small fluorescent lamp called the "Litek." The lamp seen here is a hand-made prototype from 1979.
- Most fluorescent lamps, large and small, operate by passing an electric current through a gas between two electrodes. The current energizes the gas that in turn radiates ultraviolet (UV) light. The UV is converted to visible light by a coating of phosphors inside the glass envelope of the lamp. Electrodes are responsible for much of the energy lost in a fluorescent lamp and are usually the part of the lamp that fails. Hollister's design was "electrodeless," and used high-frequency radio waves instead of electrodes to energize the gas.
- The Litek lamp worked in the laboratory, and Hollister received funding from the U.S. Department of Energy to refine the design. That proved more difficult than expected though. The electronic components available at the time were expensive and generated too much heat. Hollister tried to compensate with the massive heat-dissipation fins set below the bulb, but this added to the cost. Also, as an independent inventor Hollister could not just focus on research. He had to perform administrative tasks that researchers in corporate labs did not, and the project lagged. In the end the Litek did not reach the market, though in the 1990s the major companies all began selling electrodeless fluorescent lamps. These built on the work of several inventors, including Hollister's.
- Lamp characteristics: Nickle-plated brass medium-screw base shell with brass retainer and plastic skirt. The base insulator is part of skirt. A metal fitting attaches to the skirt to dissipate heat. Tipped, G-shaped envelope with phosphor coating on inner wall and clear tip.
- Date made
- 1979
- maker
- Hollister, Donald
- ID Number
- 1992.0466.01
- catalog number
- 1992.0466.01
- accession number
- 1992.0466
- Data Source
- National Museum of American History, Kenneth E. Behring Center
Experimental Sulfur Lamp
- Description
- New lighting inventions occasionally appear from unexpected directions. The development of this microwave-powered lamp provides a case in point. In 1990 Fusion Systems was a small company with a successful, highly specialized product, an innovative ultraviolet (UV) industrial lighting system powered by microwaves.
- Discharge lamps typically use electrodes to support an electric arc. Tungsten electrodes are most common, so materials that might erode tungsten can't be used in the lamp and care must be taken to not melt the electrodes. Fusion's lamp side-stepped this problem by eliminating electrodes entirely. Microwave energy from an external source energized the lamp. This opened the way for experiments with non-traditional materials, including sulfur.
- During the 1980s engineer Michael Ury, physicist Charles Wood, and their colleagues experimented several times with adapting their UV system to produce visible light without success. In 1990, they tried placing sulfur in a spherical bulb instead of a linear tube. Sulfur could give a good quality light, but did not work well in the linear tube. Other elements only gave marginal results in the spherical bulb. But when they tested sulfur in the spherical lamp they found what they hoped for: lots of good visible light with little invisible UV or infrared rays.
- They began setting up "crude" lamps like this one (one of the first ten according to Ury) in order to learn more about the new light source. In the mid-1990s Fusion began trying to sell their sulfur bulbs with limited success. The lamp rotated at 20,000 rpm so that the temperature stayed even over the surface, and a fan was needed for cooling. The fan and spin motor made noise and reduced energy efficiency of the total system. Then they found that the bulbs lasted longer than the magnetrons used to generate the microwaves that powered them. Finding inexpensive magnetrons proved too difficult, and the company stopped selling the product in 2002.
- Lamp characteristics: A quartz stem with notch near the bottom serves as the base. The notch locks the lamp into its fixture. The sphere has an argon gas filling, and the yellow material is sulfur condensed on the inner lamp wall. The pattern of condensation indicates lamp was burned base-down. Tipless, G-shaped quartz envelope.
- Date made
- ca 1990
- date made
- ca. 1990
- maker
- Ury, Michael G.
- ID Number
- 1992.0467.01
- catalog number
- 1992.0467.01
- accession number
- 1992.0467
- Data Source
- National Museum of American History, Kenneth E. Behring Center
Prototype Heat-Mirror Tungsten Lamp
- Description
- During the 1970s, energy crises lamp makers scrambled to develop products that would be more energy efficient. One manufacturer, Duro-Test, began working with researchers at the Massachusetts Institute of Technology (MIT) on an improved version of the ordinary incandescent lamp. The resulting product was called the "MI-T-Wattsaver" and was produced by the company from 1981 through 1989.
- The basic concept seemed simple. The hotter a tungsten filament operates, the more efficient it becomes. Most of the energy emitted by the filament is in the form of invisible infrared rays that we feel as heat. If some of that heat could be directed back at the filament to raise its temperature, the lamp would give more light with no additional electricity needed. The researchers at Duro-Test and MIT called this concept a heat-mirror. They developed a special coating that would allow visible light to pass while reflecting infrared back to the filament, and put the coating on the inside of the glass bulb.
- The concept worked but problems emerged. Tests showed that the coating aged with use, reducing the amount of heat reflected to the filament. The lamp was also difficult to make since the coating needed to be precisely applied and the filament needed to be mounted exactly in the center of the round bulb. As the price of compact fluorescent lamps fell in the late 1980s, Duro-Test decided to discontinue the MI-T-Wattsaver. The heat-mirror concept continues in use today in some tungsten-halogen lamps though.
- The lamp seen here is a prototype sent to the U.S. Department of Energy for testing and evaluation in 1981.
- Lamp characteristics: The piece has two sections-the lamp itself and a base adapter. The lamp has a brass bi-pin base (1/2" pin spacing with exhaust tube in between). Tungsten filament (broken) in CC-8 configuration with crimp connectors. A metal disc inside bottom of envelope may serve as a heat shield (the base pins pass through this disc). Tipless, G-24 glass envelope made in two halves. Both halves have an interior coating of infrared-reflecting film. The base adapter has a brass medium-screw shell, the insulator is part of a three-piece plastic skirt. Twist-lock receptacle on top connects to lamp.
- Location
- Currently not on view
- Date made
- ca 1980
- date made
- ca. 1980
- collaborator
- Massachusetts Institute of Technology
- maker
- DURO-TEST Corporation
- ID Number
- 1992.0553.09
- catalog number
- 1992.0553.09
- accession number
- 1992.0553
- Data Source
- National Museum of American History, Kenneth E. Behring Center
Experimental Sulphur-Selenium Lamp
- Description
- In the mid-1990s Fusion Lighting began selling a microwave-powered lighting system. The small, spherical bulbs contained a small amount of the element sulfur that gave a large amount of good quality light when energized by microwaves. Company researchers began investigating other materials to learn more about their new light source and perhaps to discover another saleable product.
- The lamp is from one of those follow-on experiments and contains a mix of sulfur and another element, selenium. Both elements have related properties. Chemists refer to them as Group VI elements since they appear in the same column of the Periodic Table. Fusion researchers felt that these related elements might work well together in the new system. The company donated two other sulfur-selenium lamps from the same experiment that contain mixtures with differing ratios of the two elements.
- Lamp characteristics: A quartz stem with a notched metal sleeve near the bottom serves as the base. The notch locks the lamp into its fixture. The sphere has an argon gas filling with a tiny amount of Krypton-85 to help start the discharge. The orange material condensed on the inner wall is an equal mix of sulfur and selenium. The pattern of condensation indicates lamp was burned vertically. Tipless, G-shaped quartz envelope.
- Date made
- 1997
- maker
- Fusion Lighting, Inc.
- ID Number
- 1996.0359.08
- catalog number
- 1996.0359.08
- accession number
- 1996.0359
- Data Source
- National Museum of American History, Kenneth E. Behring Center
Experimental fluorescent lamp
- Description
- The development of practical fluorescent lamps took decades, and many researchers contributed. Julius Plucker and Heinrich Geissler made glowing glass tubes in the 1850s, about the time George Stokes discovered that invisible ultraviolet light made some materials glow or "fluoresce." Alexandre Edmond Becquerel put fluorescent materials in a Geissler tube in 1859, though his tubes did not last long. Carbon dioxide-filled tubes by D. McFarlan Moore and mercury vapor tubes by Peter Cooper Hewitt around 1900 gave practical experience with gas-filled, discharge lamps and inspired the neon tubes of Georges Claude.
- In 1926 Friedrich Meyer, Hans Spanner, and Edmund Germer of Germany patented an enclosed glass tube containing mercury vapor, electrodes at either end, and a coating of fluorescent powders called phosphors. This incorporated all of the features we see in modern fluorescent tubes, but their employer did not pursue development. William Enfield of General Electric saw phosphor-coated neon tubes in France in the early 1930s, and heard that European researchers were developing a fluorescent lamp. An especially urgent 1934 letter from a consultant, Nobel-laureate Arthur Compton, coming on the heels of European breakthroughs in low-pressure sodium and high-pressure mercury lamps, spurred both GE and its licensee Westinghouse into combined action.
- Enfield created a team led by George Inman, and by the end of 1934 they made several working fluorescent lamps, including the one seen here. To save time, the team adopted the design of an existing tubular incandescent lamp in order to make use of available production equipment and lamp parts. Speed was important. In addition to European competitors, American companies like Sylvania were also working on fluorescents. A second GE group under Philip Pritchard worked on production equipment. Other GE groups in Schenectady and in Ft. Wayne assisted in developing ballasts and resolving problems of circuit design.
- In 1936 GE and Westinghouse demonstrated the new lamp to the U.S. Navy (that lamp is in the Smithsonian's collection). The public finally saw fluorescent lamps in 1939 at both the New York World's Fair and the Golden Gate Exposition in San Francisco. These early lamps gave twice the energy efficiency of the best incandescent designs. Production of fluorescent lamps, slow at first, soon soared as millions were installed in factories making equipment for the American military during World War 2.
- Lamp characteristics: Double-ended without bases. Flat presses with an exhaust tip near one press. A tungsten electrode, CC-6 configuration coated with emitter, is set at either end. A mercury pellet is loose inside the lamp. The clear T-7 glass envelope has a phosphor coating covering about 3 inches (8 cm) of the lamp near the center.
- date made
- ca. 1934
- Date made
- ca 1934
- manufacturer
- General Electric
- ID Number
- 1997.0388.41
- accession number
- 1997.0388
- catalog number
- 1997.0388.41
- Data Source
- National Museum of American History, Kenneth E. Behring Center
Experimental electrodeless compact fluorescent lamp
- Description
- As energy prices soared in the 1970s, General Electric, like other lamp makers, focused research efforts on raising the energy efficiency of electric lamps. One research program conducted by John Anderson at the GE Corporate Research and Development Laboratory in Schenectady, New York, sought to make a small fluorescent lamp that might replace a regular incandescent lamp.
- Most fluorescent lamps, large and small, operate by passing an electric current through a gas between two electrodes. The current energizes the gas that in turn radiates ultraviolet (UV) light. The UV is converted to visible light by a coating of phosphors inside the glass envelope of the lamp. Electrodes are responsible for much of the energy lost in a fluorescent lamp and are usually the part of the lamp that fails. Instead of electrodes, Anderson's design used a donut-shaped, ferrite (an iron oxide compound) to generate an electric field. The field energized the gas.
- He called his design a Solenoidal Electric Field (SEF) lamp. The one seen here is an experimental unit made around 1978. While the lamp worked in the lab, the electronics to control it were expensive and generated heat that needed to be dissipated. As with other electrodeless lamps, radio-frequency interference was a concern. By the early 1980s GE decided to shelve the SEF lamp and market a miniature metal-halide lamp instead. In the late 1990s, however, GE took advantage of the lower cost and higher capability of electronic components and marketed an electrodeless lamp that built on prior work—including the SEF lamp.
- Lamp characteristics: No base. A 1.5" (outside dia.) toroid-shaped ferrite is mounted vertically inside the lamp and held in place by a wire cradle. The conducting wire is insulated with woven nylon and wrapped ten turns around the top of the ferrite. A woven nylon mat is wrapped around the ferrite under the conductor, and another is placed between the conductor and the top-plate of the mount-cradle. A metal lead extends from the bottom of the ferrite into the exhaust-tip where it spirals around a metal cylinder. Tipless, AT-shaped envelope.
- Date made
- ca 1978
- date made
- ca. 1978
- maker
- General Electric Corporate Research & Development Laboratory
- ID Number
- 1998.0050.07
- accession number
- 1998.0050
- catalog number
- 1998.0050.07
- Data Source
- National Museum of American History, Kenneth E. Behring Center
Experimental integral compact fluorescent lamp
- Description
- As energy prices soared in the 1970s, lamp makers focused research efforts on raising the energy efficiency of electric lamps. A great deal of effort by many researchers went into designing small fluorescent lamps that might replace a regular incandescent lamp. These efforts led to modern compact fluorescent lamps that use bent or connected tubes, but many other designs were tried. This experimental "partition lamp" from 1978 shows one such design.
- Soon after the 1939 introduction of linear fluorescent lamps, inventors began receiving patents for smaller lamps. But they found that the small designs suffered from low energy efficiency and a short life-span. Further research revealed that energy efficiency in fluorescent lamps depends in part on the distance the electric current travels between the two electrodes, called the arc path. A long arc path is more efficient than a short arc path. That's why fluorescent tubes in stores and factories are usually 8 feet (almost 3 meters) long.
- Inventors in the 1970s tried many ways of putting a long arc path into a small lamp. In this case there are thin glass walls inside the lamp, dividing it into four chambers. Each chamber is connected in such a way that the electric current travels the length of the lamp four times when moving from one electrode to the other. So the arc path is actually four times longer than the lamp itself, raising the energy efficiency of the lamp. This unit was made by General Electric for experiments on the concept, though other makers were also working on partition lamps.
- While the partition design works, it proved to be expensive to manufacture and most lamp makers decided to use thin tubes that could be easily bent and folded while being made.
- Lamp characteristics: No base. Two stem assemblies each have tungsten electrodes in a CCC-6 configuration with emitter. Welded connectors, 3-piece leads with lower leads made of stranded wire. Bottom-tipped, T-shaped envelope with internal glass partition that separates the internal space into four connected chambers. Partition is made of two pieces of interlocked glass and is not sealed into the envelope. All glass is clear. No phosphors were used since the experimenter wanted to study the arc path.
- Date made
- ca 1978
- date made
- ca. 1978
- maker
- General Electric Corporate Research & Development Laboratory
- ID Number
- 1998.0050.16
- accession number
- 1998.0050
- catalog number
- 1998.0050.16
- Data Source
- National Museum of American History, Kenneth E. Behring Center
Faber Steam Engine, 1827
- Description (Brief)
- The F. & W. M. Faber stationary steam engine was built in Pittsburgh during the 1850’s. Stationary steam engines such as this one could be used to power multiple machines in a shop or factory.
- Description
- The F. & W. M. Faber stationary steam engine is a rare survivor of pre-1860 American steam power. With a horizontal cylinder and separate bases for the flywheel and engine, the Faber displays features from the dawn of steam usage inside American factories.
- Although exceedingly rare today, this engine was offered as an "off-the-shelf" stock engine in 1850s Pittsburgh, where it was built. The engine features exceptional refinement in the degree of ornamentation on the flywheel and the flyball governor, evoking the novelty and wonder of early steam power.
- The physical beauty of the Faber engine masks its relative energy inefficiency compared with engines of the period of more robust construction. In addition, records indicate this pretty engine performed the bulk of its actual service inside tanneries in Ohio and Kentucky, where the smells and wet hides and dank darkness would have belied the visions that inspired this engine's elegant design and fabrication.
- Location
- Currently not on view
- maker
- F. and W. M. Faber
- ID Number
- 1980.0227.01
- catalog number
- 1980.0227.01
- accession number
- 1980.0227
- Data Source
- National Museum of American History, Kenneth E. Behring Center
Ship Tools from the Propeller Indiana, Shovel
- Description
- All the hand tools were found in the engine and boiler space below decks in Indiana’s hold, indicating that they were used for the machinery. The crew used the shovel to add coal to the fires.
- date made
- mid-1800s
- when the Indiana was found
- 1972
- ID Number
- 1979.1030.58
- catalog number
- 1979.1030.58
- accession number
- 1979.1030
- Data Source
- National Museum of American History, Kenneth E. Behring Center
Propeller Indiana’s Capstan
- Description
- The capstan, most commonly found on the decks of early steamboats, was used as a vertical winch for raising or lowering anchors, hoisting sails and cargo, hauling heavy lines, or other jobs where individual manpower was not enough.
- It was operated manually, by putting timbers into the holes and using the resulting leverage to wind a line wrapped around the center of the device more easily. Sea chanties, or rhythmic songs, were often employed by ship crews to ensure that everyone hauled at the same time. Later in the 19th century, steam capstans and donkey engines replaced human muscle on the larger vessels.
- date made
- mid-1800s
- ID Number
- 1984.0359.02
- accession number
- 1984.0359
- catalog number
- 1984.0359.02
- Data Source
- National Museum of American History, Kenneth E. Behring Center