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They were joined in 1921 by Eugene F. McDonald, [4] and Zenith Radio Company was incorporated in 1923. The fledgling company soon became known for its high-quality radios and electronic innovations. Zenith introduced the first portable radio in 1924, [4] [5] the first mass-produced AC radio in 1926, [5] and push-button tuning in 1927. [4]
This is the first full season in which NBC broadcast more than 50% of its schedule in color, a fact which the network emphasized during its September 19–25 premiere week. [ 1 ] CBS and ABC , still mostly in black and white, continued rolling out rural sitcoms; in fall 1964, the networks added Gomer Pyle, U.S.M.C. (CBS) and No Time For ...
Curtis Mathes, Inc., is a North American electronics retailer initially based in Garland, Texas, and specializing in the sale of private label brand electronics and repair services. It manufactured its own brand of televisions in Athens, Texas , until July 31, 1982; ten years later, it filed for Chapter 11 bankruptcy and reorganization which ...
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The four-tube television camera, intended for color television studio use, was first developed by RCA in the early 1960s. [1] [2]: 96 In this camera, in addition to the usual complement of three tubes for the red, green and blue images, a fourth tube was included to provide luminance (black and white) detail of a scene.
The NTSC color system changed from the black-and-white 60-fields-per-second standard to 59.94 fields per second to make the color circuitry simpler; the 1950s TV sets had matured enough that the power frequency/field rate mismatch was no longer important. Modern TV sets can display multiple field rates (50, 59.94, or 60, in either interlaced or ...
The flashback arrestors are suitable for most technical gases (fuel gases) such as acetylene, hydrogen, methane, propane, propylene and butane as well as oxygen and compressed air. Flashback arrestors have to be tested for gas non-return, for tightness and for gas flow by a qualified person depending on the country specific regulations.
Polley's career at Zenith included positions as a product engineer and mechanical engineer. Polley later managed its Video Recording Group, then its Advanced Mechanical Design Group; he eventually became Assistant Division Chief for Zenith's Mechanical Engineering Group. He retired after a 47-year career [1] in which he earned 18 U.S. patents. [4]