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Siemens SD660
The Siemens SD660, originally known as the Siemens SD600, is a double-articulated, 70%-low-floor light rail vehicle (LRV) manufactured by Siemens Transportation Systems. It was the first low-floor light rail vehicle to be used in the United States. It first entered service in 1997 with its only operator, TriMet, on the MAX light rail system in Portland, Oregon, United States. History The initial order placed by TriMet in May 1993 was for 39 cars. It was the first order for low-floor light rail vehicles (LRVs) in North America. The order was subsequently expanded to 46 cars and ultimately to 52. TriMet received the first car, which it numbered 201, in July 1996, and the first nine cars entered service on August 31, 1997. Siemens retroactively changed the car's model designation from SD600 to SD660, a change relating to its use of AC motors running on 60 Hz instead of DC ones, in 1998. The 52nd car was received by TriMet in April 2000. TriMet later purchased 27 more SD660s ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steel Bridge
The Steel Bridge is a through truss, double-deck vertical-lift bridge across the Willamette River in Portland, Oregon, United States, opened in 1912. Its lower deck carries railroad and bicycle/pedestrian traffic, while the upper deck carries road traffic (on the Pacific Highway West No. 1W, former Oregon Route 99W), and light rail (MAX), making the bridge one of the most multimodal in the world. It is the only double-deck bridge with independent lifts in the world and the second oldest vertical-lift bridge in North America, after the nearby Hawthorne Bridge. The bridge links the Rose Quarter and Lloyd District in the east to Old Town Chinatown neighborhood in the west. History The bridge was completed in 1912 and replaced the Steel Bridge that was built in 1888 as a double-deck swing-span bridge. The 1888 structure was the first railroad bridge across the Willamette River in Portland. Its name originated because steel, instead of wrought iron, was used in its construct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Railway Journal
The ''International Railway Journal'' (IRJ) is a monthly international trade magazine published by Simmons-Boardman Publishing in Falmouth, England. History Founded by Robert Lewis and ''Railway Age'' editor Luther Miller as the world's first globally distributed magazine for the railway industry, the first edition of IRJ was published as a pilot in October 1960. Monthly production commenced in January 1961. Content The magazine covers a range of rail-related content, covering sectors including passenger, freight, high-speed, metro and light rail. Regular subject matters include financial news, fleet orders, infrastructure, new technologies and government policy. Circulation and Distribution IRJ publishes regular content on its website, and also publishes a monthly print edition, distributed through controlled circulation. IRJ's print edition had a circulation of 10,234 copies in 2020, according to the Audit Bureau of Circulations (UK). [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siemens Tram Vehicles
Siemens AG ( ) is a German multinational conglomerate corporation and the largest industrial manufacturing company in Europe headquartered in Munich with branch offices abroad. The principal divisions of the corporation are ''Industry'', ''Energy'', ''Healthcare'' (Siemens Healthineers), and ''Infrastructure & Cities'', which represent the main activities of the corporation. The corporation is a prominent maker of medical diagnostics equipment and its medical health-care division, which generates about 12 percent of the corporation's total sales, is its second-most profitable unit, after the industrial automation division. In this area, it is regarded as a pioneer and the company with the highest revenue in the world. The corporation is a component of the Euro Stoxx 50 stock market index. Siemens and its subsidiaries employ approximately 303,000 people worldwide and reported global revenue of around €62 billion in 2021 according to its earnings release. History 1847 to 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bi-directional Vehicle
A bi-directional vehicle is a vehicle that can be driven in either direction, forwards or backwards. Usually, the term refers to rail vehicles, such as trains or trams, and some airside transfer buses, that are equipped with driver's cabs at both ends. These vehicles generally have entry and exit doors on either side of the vehicle. One major benefit of bi-directional vehicles is the ability to reverse direction at a terminal station with a stub-end track. On a system using double track, a crossover switch is often used to move the vehicle to the other track. This situation contrasts with the use of uni-directional vehicles, which requires the use of a balloon loop, triangle junction, or turntable to reverse direction. Aside from eliminating the need for complicated railway infrastructure to turn vehicles around, the presence of doors on either side of the vehicle enable the use of island platform An island platform (also center platform, centre platform) is a st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridge Plate (mechanism)
A bridge plate, or bridgeplate, is a mechanical, movable form of wheelchair ramp that is used on some low-floor light rail vehicles (LRVs) to provide for wheelchair access. The bridge plate extends from the vehicle to the platform, which must be raised to close to the level of the floor of the vehicle so that the wheelchair need not travel over an excessively steep ramp (in the United States, the Americans with Disabilities Act specifies that the slope must be no more than 1 inch of rise for every 12 inches of length). Some low-floor bus A bus (contracted from omnibus, with variants multibus, motorbus, autobus, etc.) is a road vehicle that carries significantly more passengers than an average car or van. It is most commonly used in public transport, but is also in use for cha ...es also use bridge plates (in this case, extending to the curb) to provide for wheelchair access, but many low-floor buses instead use a ramp that normally serves as part of the floor but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doorway Bridgeplate In Low-floor LRV , a proposed science-fiction series by George R.R. Martin
{{disambig, geo ...
Doorway or The Doorway may refer to: Portals * A door-shaped entrance. * A doorway page, a type of webpage. * A trapdoor. Geography *Doorway, Kentucky, a community in the United States Arts, entertainment, and media Music *''Doorway'', a 2007 album by Ron Block * "Doorway", a song by Planningtorock from the album ''W (Planningtorock album)'' * "The Doorway", a song by Neurosis from the album ''Times of Grace'' Other arts, entertainment, and media * ''The Doorway'' (film), a 2000 Roger Corman film * "The Doorway" (''Mad Men''), the season six, 2-hour premiere episode of the television series ''Mad Men'' *Doorways ''Doorways'' is a proposed science fiction series from writer George R. R. Martin. A pilot was shot in May 1992, starring George Newbern, Anne Le Guernec, Robert Knepper, Kurtwood Smith, Hoyt Axton, Max Grodenchik, and Carrie-Anne Moss, but was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LED Display
A LED display is a flat panel display that uses an array of light-emitting diodes as pixels for a video display. Their brightness allows them to be used outdoors where they are visible in the sun for store signs and billboards. In recent years, they have also become commonly used in destination signs on public transport vehicles, as well as variable-message signs on highways. LED displays are capable of providing general illumination in addition to visual display, as when used for stage lighting or other decorative (as opposed to informational) purposes. LED displays can offer higher contrast ratios than a projector and are thus an alternative to traditional projection screens, and they can be used for large, uninterrupted (without a visible grid arising from the bezels of individual displays) video walls. microLED displays are LED displays with smaller LEDs, which poses significant development challenges. History Light-emitting diodes (LEDs) came into existence in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Destination Sign
A destination sign (North American English) or destination indicator/destination blind (British English) is a sign mounted on the front, side or rear of a public transport vehicle, such as a bus, tram/streetcar or light rail vehicle, that displays the vehicle's route number and destination, or the route's number and name on transit systems using route names. The main such sign, mounted on the front of the vehicle, usually located above (or at the top of) the windshield, is often called the headsign, most likely from the fact that these signs are located on the front, or head, end of the vehicle. Depending on the type of the sign, it might also display intermediate points on the current route, or a road that comprises a significant amount of the route, especially if the route is particularly long and its final terminus by itself is not very helpful in determining where the vehicle is going. Technology types Several different types of technology have been used for destination si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DC Motor
A DC motor is any of a class of rotary electrical motors that converts direct current (DC) electrical energy into mechanical energy. The most common types rely on the forces produced by induced magnetic fields due to flowing current in the coil. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current in part of the motor. DC motors were the first form of motors widely used, as they could be powered from existing direct-current lighting power distribution systems. A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings. Small DC motors are used in tools, toys, and appliances. The universal motor, a lightweight brushed motor used for portable power tools and appliances can operate on direct current and alternating current. Larger DC motors are currently used in propulsion of electric vehic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hertz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one hertz is the reciprocal of one second. It is named after Heinrich Rudolf Hertz (1857–1894), the first person to provide conclusive proof of the existence of electromagnetic waves. Hertz are commonly expressed in multiples: kilohertz (kHz), megahertz (MHz), gigahertz (GHz), terahertz (THz). Some of the unit's most common uses are in the description of periodic waveforms and musical tones, particularly those used in radio- and audio-related applications. It is also used to describe the clock speeds at which computers and other electronics are driven. The units are sometimes also used as a representation of the energy of a photon, via the Planck relation ''E'' = ''hν'', where ''E'' is the photon's energy, ''ν'' is its frequency ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AC Motor
An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts, an outside stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft producing a second rotating magnetic field. The rotor magnetic field may be produced by permanent magnets, reluctance saliency, or DC or AC electrical windings. Less common, AC linear motors operate on similar principles as rotating motors but have their stationary and moving parts arranged in a straight line configuration, producing linear motion instead of rotation. Operating principles The two main types of AC motors are induction motors and synchronous motors. The induction motor (or asynchronous motor) always relies on a small difference in speed between the stator rotating magnetic field and the rotor shaft speed called slip to induce rotor current in the rotor AC winding. As a result, the inducti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
