|Description||Raychem Metal Oxide Varistors, c. 1957-1999. Thin metal wires connected in the middle by electrodes. Electrodes are two metal plates with grains zinc oxide in between them. Electrodes are circular and coated in blue plastic. The blue circle is flat with some raised lines from the wire. Blue plastic coating covers small portion of the wire. There are five. Varistors are used to protect circuts and other electronic devices from electricity surges.|
|Object Name||Wire, Electric|
|Collection||3D - Electrical & Magnetic Tools & Equipment|
|Title||Raychem Metal Oxide Varistors, c. 1957-1999.|
|Creator||Raychem Corporation, Menlo Park|
Varistors provide "protection against high voltage transients (variations in electrical flow) and surges which may be produced, for example, by lightning, switching or electrical noise on AC or DC power lines." When a variation or surge in electricity happens, the varistor absorbs and holds it, therefore proctecting the sensitive circuts.
"Raychem was founded on January 1, 1957. It grew rapidly by creating proprietary new products based on Radiation processing of polymers to meet critical and difficult industry needs for electrical circuit integrity in harsh environments. Included in these initial products were irradiated wire insulation and heat shrinkable tubing. Markets included Aerospace, Military, Automotive, Telecommunications and Electrical Power Generation markets.
"In 1968, Raychem acquired Chemelex leading Raychem to extend its radiation polymer processing technology to polymers filled with conductive carbon creating a family of "Self Limiting Heaters". This technology was further extended to produce resettable switches forming the enabling technology for the "Polyswitch" Division.
"As Raychem grew into a world class Material Science Company, additional technologies explored, developed and taken to market were Heat Recoverable Metals, Piezoelectric Materials (Elographics), Silicone Gels (Geltek) and Liquid Crystals (Taliq).
"Each year, Raychem devoted between 8 and 10 percent of sales into Research and Development resulting in thousands of new products based on the technologies listed above. Research and Product Development labaratories, in addition to Menlo Park and Redwood City were established in Swindon, UK, Kessel-Lo, Belgium, Ottobrunn, Germany, Pontois, France and Japan.
"Manning these laboratories were an extremely creative and talented group of scientists and engineers who found innovative ways to use technologies to create new products."
|Dimensions||H-0.125 W-0.75 D-4.25 inches|