Broadcast radio grew into a major industry in the decade following the First World War as inventors refined the technology and entrepreneurs established supporting companies. By the 1930s, so many people wanted radio that the Great Depression slowed but could not stop the industry’s growth. Radio engineering became an attractive field for people interested in advanced technology and research laboratories like that operated by the Radio Corporation of America (RCA) pushed advances in components and circuit designs.
Materials research also affected radio, as seen in the plastic casing of this Emerson radio receiver from about 1937. The so-called tombstone design was popular in the 1920s but the receivers typically were made of wood. Aside from being flammable, wood cases could warp and split, and the finishes scratched and stained easily. This radio’s case, made with a plastic called catalin developed by the American Catalin Corporation in the late 1920s, resisted heat and incidental damage like water stains. Available in a variety of colors and designs, catalin radios remain popular with collectors.
This bicycle’s welded steel rear fork was created using Elihu Thomson’s electric welding apparatus (see object number MC*181724). Welding samples demonstrated the potential industrial applications of electric welding, and illustrations of these samples were published in journals, brochures, and advertisements. Elihu Thomson’s invention of electric welding in 1885 resulted in numerous industrial applications including the manufacture of automobile parts, tools, screws, ball bearings, and wire lines. Thomson’s welding apparatus pressed two pieces of metal together while an electric current ran through the metal. Resistance to the current at the contact point between the metal pieces created heat and welded the metals together.
Scientist and inventor Elihu Thomson (1853-1937) played a prominent role in the industrialization and electrification of America with over 700 patents in his name. His inventions and patents helped change the nature of industry in the United States and included the “uniflow” steam engine, automobile muffler, producing fused quartz, stereoscopic x-ray pictures, electric arc lamps, lightning arrestors, and perhaps most notably—the process of electrical welding. Thomson and partner Edwin Houston established a variety of companies to manage his industrial interests. In 1892, his Thomson-Houston Electric Company merged with the Edison Electric Company to form General Electric.
This bicycle’s welded steel top tube was created using Elihu Thomson’s electric welding apparatus (see object number MC*181724). Welding samples demonstrated potential industrial applications of electric welding, and illustrations of these samples were published in journals, brochures, and advertisements. Elihu Thomson’s invention of electric welding in 1885 resulted in numerous applications including the manufacture of automobile parts, tools, screws, ball bearings, and wire lines. Thomson’s welding apparatus passed an electric current through two pieces of metal pressed together. Resistance to the current at the contact point between the metal pieces created heat and welded the metals together.
Scientist and inventor Elihu Thomson (1853-1937) played a prominent role in the industrialization and electrification of America with over 700 patents in his name. His inventions and patents helped change the nature of industry in the United States and included the “uniflow” steam engine, automobile muffler, producing fused quartz, stereoscopic x-ray pictures, electric arc lamps, lightning arrestors, and perhaps most notably—the process of electrical welding. Thomson and partner Edwin Houston established the Thomson-Houston Electric Company in 1883. In 1892 Thomson-Houston merged with the Edison Electric Company to form General Electric.
This bicycle’s welded steel crank hanger was created using Elihu Thomson’s electric welding apparatus (see object number MC*181724). Welding samples demonstrated the potential industrial applications of electric welding, and illustrations of these samples were published in journals, brochures, and advertisements. Elihu Thomson’s invention of electric welding in 1885 resulted in numerous industrial applications including the manufacture of automobile parts, tools, screws, ball bearings, and wire lines. Thomson’s welding apparatus pressed two pieces of metal together while an electric current ran through the metal. Resistance to the current at the contact point between the metal pieces created heat and welded the metals together.
Scientist and inventor Elihu Thomson (1853-1937) played a prominent role in the industrialization and electrification of America with over 700 patents in his name. His inventions and patents helped change the nature of industry in the United States and included the “uniflow” steam engine, automobile muffler, producing fused quartz, stereoscopic x-ray pictures, electric arc lamps, lightning arrestors, and perhaps most notably—the process of electrical welding. Thomson and partner Edwin Houston established a variety of companies to manage his industrial interests. In 1892, his Thomson-Houston Electric Company merged with the Edison Electric Company to form General Electric.
During the 1930s radio makers introduced many designs for both radio circuits and receiver styling. As engineers gained better understanding of how radios work they refined component technology, especially radio tubes. Smaller tubes and better condensers improved performance of a radio and lower the power consumption. Meanwhile industrial designers like Raymond Loewy and John Vassos took advantage of new plastic compounds to bring artistic flair to radio styles.
This Emerson "Baby" radio receiver, made around 1940, shows both aspects of advancing radio design. The compact unit squeezes several small vacuum tubes into the case. The flat loop antenna is mounted on the inside of the wooden back plate. The red case is made with a plastic called catalin, a refined version of Bakelite phenolic and shows a marbled effect popular at the time.
Engineers began to develop magnetic recorders for video use in the early 1950s and Ampex produced the first commercial unit in 1956. Twenty years of further refinement resulted in miniaturized components and several types of video recorders practical for home use. The Video Home System or “VHS” format was jointly developed in Japan by Japan Victor Company (JVC) and Panasonic.
VHS cassette were originally designed for two hours of programming although this was later lengthened to four hours by slowing the tape speed and sacrificing some of the image resolution. This model VBT200 machine is unusual in that it features a top-loading cassette, most VHS machines used a front-loading design that allowed for easier placement in a video rack or entertainment cabinet. The VHS format was challenged in the market for about ten years by a rival format, the Sony Beta. Ultimately VHS became the defacto standard for home video recording until it was superceded by an optical format in the late 1990s, the digital versatile disk or “DVD.”
Inventors introduced many electrical kitchen appliances in the years before the First World War. The ease of turning on an electric appliance and controlling the current appealed to people used to having to tend a fire in order to cook. Power companies liked selling appliances since they were often used during the day when light bulbs were turned off. That kept expensive generators from sitting idle.
The trade name on this egg boiler, El Eggo, is not entirely a play on Spanish. The El is actually short for electric. Pacific Electric Heating Co. marketed an entire line of electrical products using that prefix, for example El Toasto for a toaster.
This bicycle’s welded steel crank hanger was created using Elihu Thomson’s electric welding apparatus (see object number MC*181724). Welding samples demonstrated the potential industrial applications of electric welding, and illustrations of these samples were published in journals, brochures, and advertisements. Elihu Thomson’s invention of electric welding in 1885 resulted in numerous industrial applications including the manufacture of automobile parts, tools, screws, ball bearings, and wire lines. Thomson’s welding apparatus pressed two pieces of metal together while an electric current ran through the metal. Resistance to the current at the contact point between the metal pieces created heat and welded the metals together.
Scientist and inventor Elihu Thomson (1853-1937) played a prominent role in the industrialization and electrification of America with over 700 patents in his name. His inventions and patents helped change the nature of industry in the United States and included the “uniflow” steam engine, automobile muffler, producing fused quartz, stereoscopic x-ray pictures, electric arc lamps, lightning arrestors, and perhaps most notably—the process of electrical welding. Thomson and partner Edwin Houston established a variety of companies to manage his industrial interests. In 1892, his Thomson-Houston Electric Company merged with the Edison Electric Company to form General Electric.