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An 8-plate 160 V 450 mA Federal brand selenium rectifier. A selenium rectifier is a type of metal rectifier, invented in 1933. [1] They were used in power supplies for electronic equipment and in high-current battery-charger applications until they were superseded by silicon diode rectifiers in the late 1960s.
A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage and current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged.
Schumacher soon started selling internationally. The company has always operated out of Northampton [3] but sources some components from China like most other RC companies; however, the majority of manufacturing remains in England. Cecil Schumacher's son Robin Schumacher took over the business in 2001.
The John Deere PowerShift transmission was an eight-speed semi-automatic transmission without a torque converter, used in John Deere tractors, including the iconic John Deere Model 4020. [1] The Powershift is not to be confused with similar John Deere transmissions (including the Quad-Range and the PowrQuad [ 2 ] ), or with the Ford Ultra ...
Example of a bread hook being used, in an Assistent of approximately mid-to-late-1990s vintage. The most distinctive feature of the mixer is that it spins the bowl and its contents while the attachments remain stationary, unlike "planetary" mixers such as the KitchenAid, which moves the attachments around the center of the stationary bowl. [3]
Small Is Beautiful: A Study of Economics As If People Mattered is a collection of essays published in 1973 by German-born British economist E. F. Schumacher.The title "Small Is Beautiful" came from a principle espoused by Schumacher's teacher Leopold Kohr [1] (1909–1994) advancing small, appropriate technologies, policies, and polities as a superior alternative to the mainstream ethos of ...