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The HART Communication Protocol (Highway Addressable Remote Transducer) is a hybrid analog+digital industrial automation open protocol. Its most notable advantage is that it can communicate over legacy 4–20 mA analog instrumentation current loops, sharing the pair of wires used by the analog-only host systems.
Hart's first inversor, also known as Hart's W-frame, is based on an antiparallelogram.The addition of fixed points and a driving arm make it a 6-bar linkage. It can be used to convert rotary motion to a perfect straight line by fixing a point on one short link and driving a point on another link in a circular arc.
The Smith & Wesson Model 40 originally debuted as the Centennial in 1952 and was renamed the Model 40 in 1957. The Model 40 is chambered in .38 special and has a five-round capacity. It is a snub-nose revolver with a 1 7/8-inch barrel. It is built on Smith & Wesson's J-frame and weighs 21 oz. empty. [2]
Hart Schaffner Marx is an American manufacturer of ready-to-wear menswear owned by New York City–based Authentic Brands Group. With origins dating to a family business in 1872 Chicago and incorporated in 1911 as "Hart Schaffner & Marx", [ 1 ] the company is now located in Des Plaines, Illinois .
In 1985, the Federal Communications Commission allocated the frequency band between 902 and 928 MHz to Part 18 ISM (industrial, scientific, and medical) devices. In that proceeding, the band was also allocated to the Amateur Radio Service on a secondary basis meaning amateurs could use the band as long as they accepted interference from, and did not cause interference to, primary users.
The Porsche 917 is a sports prototype race car developed by German manufacturer Porsche to exploit the regulations regarding the construction of 5-litre sports cars. Powered by a Type 912 flat-12 engine which was progressively enlarged from 4.5 to 5.0 litres, the 917 was introduced in 1969 and initially proved unwieldy on the race track but continuous development improved the handling and it ...