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Raynor — the company's line of garage door openers for professional installers. This line of professional installers is slightly less common than LiftMaster. Craftsman — re-branded Chamberlain models sold at Sears. Those products have a "139" model prefix to denote that the Chamberlain Group made them for Sears.
A typical single-car garage roller door has a preloaded spring inside the rolling mechanism. The spring reduces the effort required to open the door. Oversized roller doors in commercial premises are not sprung (except in the US), and a manual pulley and chain system or a geared motor is used to raise and lower (roll up and roll down) the door.
A can opener (North American and Australian English) or tin opener (British English) is a mechanical device used to open metal tin cans. Although preservation of food using tin cans had been practiced since at least 1772 in the Netherlands, the first can openers were not patented until 1855 in England and 1858 in the United States.
The Pennsylvania Manual is a biennial guide to the Government of Pennsylvania produced by the Pennsylvania Department of General Services. [1] The Pennsylvania Manual has been published by the Pennsylvania Government for over 200 years. [ 1 ]
A Crocodile of the Swiss Federal Railways.Each set of 6 driving wheels is driven by a jackshaft between the driving wheels, gear-driven by a pair of traction motors. A jackshaft is an intermediate shaft used to transfer power from a powered shaft such as the output shaft of an engine or motor to driven shafts such as the drive axles of a locomotive.
This was the #300, an ALCO demonstrator. The engine used was the Model 330 and GE electrical transmission was used. Another demonstrator #300 was built as an end cab switcher in July 1931 also using General Electric electrical equipment. This unit was sold to the Lehigh Valley Railroad as its #102. A subsequent 300 horsepower (220 kW) end cab ...