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A Tensor lamp is a trademarked brand of small high-intensity low-voltage desk lamp invented by Jay Monroe. [ 1 ] [ 2 ] The lamp was mainly popular during the 1960s and 1970s. [ 3 ] [ 4 ] The lamp was originally used by doctors and dentists, and later became more widely used. [ 5 ]
Due to Monroe's and Tensor's success in selling their original type of small high-intensity lamps, other companies began to design and sell similar types of lamps to the general public by 1963. [3] One of the primary competitors of the "Tensor Lamp" throughout the 60s was the Koch Creations "Lampette", which had a similar design and function.
Because glow discharge occurs readily at 110-120 volts AC, one could use these bulbs in standard household lamps in the United States. The phosphors used in the bulbs were somewhat brittle, necessitating care in handling. Shaking or jarring the bulbs would cause flaking and migration of the phosphors to other parts of the metallic sculpture.
Edward Miller & Co. (1844–1924) was formed in Meriden, Connecticut, and is primarily known as a historical manufacturer of lamps. The company also made brass kettles and oil heaters. In 1866, the corporation was formed with capital of US$200,000. Its earlier beginning included being started by Horatio Howard.
Osram Sylvania manufactures and markets a wide range of lighting products for homes, business, and vehicles and holds a leading share of the North American lighting market [2]. In fiscal year 2008, the company achieved sales of about 1.75 billion euros, which comprised about 38% of Osram's total sales at the time. [5]
The Astro lamp, or lava lamp, was invented around 1963 by Edward Craven Walker.It was adapted from a design for an egg timer spotted in a pub in Dorset, England. Edward and Christine Craven-Walker licensed the product to a number of overseas markets whilst continuing to manufacture for the European market themselves under the original name of the company, Crestworth. [3]