Trolleys, electric

A similar pattern—based on factors that had nothing to do with technological merit—devastated the extensive electric trolley and in-terurban light rail systems that commanded billions in ridership in the early 1900s. In 1921, when Americans wanted to go somewhere, they used rail 90 percent of the time, mostly electrical rail systems and... 

Link Transit, in Wenatchee, Washington, will acquire up to 10 electric trolley buses manufactured by Ebus with Altairnano nLTO batteries as well as two quick-charge stations powered by renewable hydropower. 

When powered by an electric motor, generally taking power from overhead wires ( catenaries ) such a vehicle is called an electric trolleybus or a trackless trolley. An electric bus taking power from current in the ground has been developed by Ansaldo-Breda. Battciy-powcrcd buses also have been developed, although all of these have been smaller than stan-... 

Lamb et al studied the conversion concept of a crosscurrent moving bed. The PBC system consisted of a trolley filled with a fuel bed of bagasse. The trolley rolled horizontally over a vertical air duct to simulate the moving bed (Figure 3). The speed of the trolley was controlled to keep the flame in a stationary position over the duct. An electrically heated platen, 30x15 cm, was placed horizontally 12 cm above the base of the bed, simulating radiation from furnace walls. 

Industrial-type Hazards—-with the objective of identifying hazard sources in electrical, mechanical, illumination, and non-emergency communication fields. Developments have included (a) advanced remote surveillance and communication systems, (hi portable-area illumination systems. Ic) trolley-phone wireless systems, and (d) protective canopies for use on underground low-coal machines. 

Almost all road vehicles are powered by ICEs. The only notable exceptions include vehicles powered by electricity drawn from an external grid (e.g. trolley buses), from on-board batteries (e.g. electric cars) or, possibly in the future, from fuel cells. 

The car truck is also equipped with a power supply soince, an observation system, control equipment including power automatic machinery and a transceiver (another option is also possible of electric-power transmission using trolley or a rail with pulse-code modulation of steering commands). 

The early electric cars were favored by many city dwellers. Electric vehicles grew out of experiments with electric trains and trolleys. They became practical with the invention of the storage battery in 1859. 

The failure of the electric car, of Edison s home power plant, and of trolleys and light rail was not inevitable or even sensible. Such... 

Another important factor was the suburban housing boom after World War II —and the failure of trolley lines controlled by auto companies to extend service to the new communities. Earlier in the century, the electric rail lines had always grown along with development, but after... 

Motor vehicle includes a vehicle, machine, tractor, trailer, or semi-trailer, or any combination thereof, propelled or drawn by mechanical power and used upon the highways in the transportation of passengers or property. It does not include a vehicle, locomotive, or car operated exciusiveiy on a raii or rails, or a trolley bus operated by electric power derived from a fixed overhead wire, furnishing local passenger transportation similar to street-railway service. 

Other equipment, working at lower velocities and with a flat contact, does not imitate aquaplaning and is more suitable under dry conditions. The be.st known example is the Tortus apparatus designed by British Ceram Research Ltd. and described by Brough et al. [26]. This is a four-wheeled trolley electrically propelled across the floor. A cylindrical rubber piece contacts the floor, and the frictional resistance is monitored via a spring assembly coupled to a transducer. The FSC 2000 [27] is very. similar. Portable equipment of this type is useful in that it enables tests to be made on installed floors, but in the laboratory different tests are sometimes used. 

In coal mine system, major noises come from main fans, coal winning machines, transport machines, road-headers, air hammers, electric drills, trolleys, cages, air compressors and auxiliary fans, etc. Because underground working space is small and closed in coal mines, it is difficult for the sound to spread and due to hard walls around tunnel, sound-absorbing ability is not obvious, which makes the underground noise pollution more serious in coal mines (Ye 2005). Statistics show that noise intensity among many coal mines reach and even exceed the national occupational health standards (Xu Liu 2008). 

In terms of safety, a computer system appears ostensibly to pose little risk to the user and its presence in a classroom seems to offer little risk to pupils. Reputable companies produce machines that comply with electrical safety regulations. Except for portables, computers are usually static in nse, being placed on a desk or a trolley, and thus may appear to be relatively safe. However, experience of working with ICT has shown me that there are significant safety issues of which every teacher should be aware. These same issues have been used to frame the legal context that surrounds the use of ICT in the workplace via the European Community Directive (EEC) on the use of Visual Display Units (VDUs) (EEC, 1990). The potential hazards are compounded when there are multiple computer systems in one room, for example, in a computer lab. The issues that affect pupils, teachers and other school employees who come into contact with ICT are ... 

HSCs are used as tractive power sources in electric buses, wheelchairs, and trolleys and in lanterns. Besides, it is planned to be used in portable devices (radio telephones, camera recorders, players), and so on. One of the advantages of HSCs as compared... 

Hoists for long hft with motor driven trolley, cab or floor controlled, variable speed, mechanical or electric load braking, double reeving, single or twin load hooks, overload relays, AC current. FOB cost = 40000 for lifting capacity = 3 Mg with n = 0.82 for the range 2-20. For DC current X 1.05. L-tM = 1.5. L/M = 0.22. 

Cold wall, single barrel Gantry-Trolley Electrical Cold wall 20 kW... 

Subsystem Trolley Drive Assembly. The trolley drive assembly moves the hoist assembly laterally across the 14 ft span between the runway rails. This is accomplished by applying torque through the trolley drive gear case to the trolley wheels. The assembly consists of a 5-horsepower, 220/440-V, three-phase, 60-Hz enclosed motor, driving through the trolley drive gear reducer assembly. The motor is reversible and therefore able to drive the trolley in either direction. An electrically released, spring-set motor brake provides frictional torque to brake and hold the trolley. Contact limit switches are provided for trolley travel in either direction. 

Information on LIB battery failures and maintenance issues can also be found in NREL evaluations of hybrid and electric transit bus fleets operating in many US cities [58,59]. These reports evaluate HEB and EB fleets such as the New York City Transit BAE Orion diesel hybrid bus fleet, Long Beach Transit gasoline-electric hybrids. King County Metro Allison HEB, and Knoxville Area Transit Ebus EB and trolleys. For instance, the NREL multigenerational comparison of Orion/BAE HEBs operating in the New York City Metropolitan Transit Authority transit fleet [60] identified the key LIB performance, durability, and safety improvements needed for transit reliability, availability and durability [61]. 

Each overhead electric hoist must be equipped with a limit device to stop the hook at its highest and lowest point of safe travel. Each hoist must automatically stop and hold any load up to 125 percent of its rated load if its actuating force is removed. The rated load of each hoist must be legibly marked and visible to the operator. Stops must be provided at the safe limits of travel for a trolley hoist. The controls of each hoist should be plainly marked to indicate the direction of travel or motion. 

---