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William Morrison (chemist)
William Morrison (23 August 1855 – 29 August 1927) was a Scottish chemist. His background in chemistry piqued his interest in improving storage batteries. He concentrated on how to produce the most available energy for a unit of weight for efficiency in the working of an individual battery cell. Eventually, he developed storage batteries far more powerful than what had then been available. To demonstrate his batteries, Morrison installed 24 of them on a common horse-drawn carriage and attached an electric motor to the rear axle to be powered by them. Through various innovations, he developed the controls for the power used and the vehicle's steering so that the driver had complete control. Morrison invented the first practical self-powered four-wheeled electric carriage in the United States. His electric vehicle was the first to be driven in Chicago and in his hometown of Des Moines, Iowa. This electric horseless buggy of the late 19th century helped pave the way for the hy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California
California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territories of the United States by population, most populous U.S. state and the List of U.S. states and territories by area, 3rd largest by area. It is also the most populated Administrative division, subnational entity in North America and the 34th most populous in the world. The Greater Los Angeles area and the San Francisco Bay Area are the nation's second and fifth most populous Statistical area (United States), urban regions respectively, with the former having more than 18.7million residents and the latter having over 9.6million. Sacramento, California, Sacramento is the state's capital, while Los Angeles is the List of largest California cities by population, most populous city in the state and the List of United States cities by population, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laboratory
A laboratory (; ; colloquially lab) is a facility that provides controlled conditions in which scientific or technological research, experiments, and measurement may be performed. Laboratory services are provided in a variety of settings: physicians' offices, clinics, hospitals, and regional and national referral centers. Overview The organisation and contents of laboratories are determined by the differing requirements of the specialists working within. A physics laboratory might contain a particle accelerator or vacuum chamber, while a metallurgy laboratory could have apparatus for casting or refining metals or for testing their strength. A chemist or biologist might use a wet laboratory, while a psychologist's laboratory might be a room with one-way mirrors and hidden cameras in which to observe behavior. In some laboratories, such as those commonly used by computer scientists, computers (sometimes supercomputers) are used for either simulations or the analysis of data. Scient ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of The Electric Vehicle
Practical electric vehicles appeared during the 1890s. An electric vehicle held the vehicular land speed record until around 1900. In the 20th century, the high cost, low top speed, and short-range of battery electric vehicles, compared to internal combustion engine vehicles, led to a worldwide decline in their use as private motor vehicles. Electric vehicles have continued to be used for loading and freight equipment and for public transport – especially rail vehicles. At the beginning of the 21st century, interest in electric and alternative fuel vehicles in private motor vehicles increased due to: growing concern over the problems associated with hydrocarbon-fueled vehicles, including damage to the environment caused by their emissions; the sustainability of the current hydrocarbon-based transportation infrastructure; and improvements in electric vehicle technology. Since 2010, combined sales of all-electric cars and utility vans achieved 1 million units delivered g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surrey (carriage)
A surrey is a doorless, four-wheeled carriage popular in the United States during the late 19th and early 20th centuries. Usually two-seated and holding for four passengers, surreys had a variety of tops that included a rigid, fringed canopy, parasol, and extension. The seats were traditional, spindle-backed (often upholstered), bench seats. Before the advent of automobiles, these were horse-drawn carriages. The name is short for "Surrey cart", named after Surrey in England, where they were first made. In popular culture The American surrey was famously celebrated in the song "The Surrey with the Fringe on Top" from the musical ''Oklahoma!''. Gallery File:Surrey (PSF).svg, Line-art representation of a horse-drawn surrey. File:1890 Carriage Model.jpg, 1890 Canadian open-top surrey once used in Vancouver Vancouver ( ) is a major city in western Canada, located in the Lower Mainland region of British Columbia. As the List of cities in British Columbia, most populous ci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rack And Pinion
A rack and pinion is a type of linear actuator that comprises a circular gear (the '' pinion'') engaging a linear gear (the ''rack''). Together, they convert rotational motion into linear motion. Rotating the pinion causes the rack to be driven in a line. Conversely, moving the rack linearly will cause the pinion to rotate. A rack and pinion drive can use both straight and helical gears. Though some suggest helical gears are quieter in operation, no hard evidence supports this theory. Helical racks, while being more affordable, have proven to increase side torque on the datums, increasing operating temperature leading to premature wear. Straight racks require a lower driving force and offer increased torque and speed per percentage of gear ratio which allows lower operating temperature and lessens viscal friction and energy use. The maximum force that can be transmitted in a rack and pinion mechanism is determined by the tooth pitch and the size of the pinion as well as the gear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speed Record
A speed record is a world record for speed by a person, animal, or vehicle. The function of speed record is to record the speed of moving animate objects such as humans, animals or vehicles. Overall speed record Overall speed record is the record for the highest average speed regardless of any criteria, categories or classes that all the more specific records belong to, provided that the route was completed. It helps to compare various performances that differ by the type of the craft, vessel or vehicle, the departure and the arrival points (provided that the distances are comparable), number, age and gender of the crew members, departure date, etc. The distance used for calculating the overall speed record is usually the distance in a straight line. In the case of man-powered races, overall speed record doesn't always reflect the best performance. It is highly dependent on technological advantages generating the speed of the craft, vessel or vehicle. Term Overall Speed Record is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bench (furniture)
A bench is a long seat on which multiple people may sit at the same time. Benches are typically made of wood, but may also be made of metal, stone, or other synthetic materials. Many benches have back rests while others do not and can be sat on from either side. Arm rests are another common feature. In many American public areas, benches are often donated by persons or associations, which may then be indicated on it, e.g. by a small plaque. This is a common form of memorial to somebody who has died (see memorial bench). Benches can be both outdoors and indoors, but they are more commonly found outdoors. Types Often benches are simply named for the place they are used, regardless of whether this implies a specific design. * Park benches are set as seating places within public parks, and vary in the number of people they can seat. * Garden benches are similar to public park benches, but are longer and offer more sitting places. * Picnic tables, or catering buffet tables h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific American
''Scientific American'', informally abbreviated ''SciAm'' or sometimes ''SA'', is an American popular science magazine. Many famous scientists, including Albert Einstein and Nikola Tesla, have contributed articles to it. In print since 1845, it is the oldest continuously published magazine in the United States. ''Scientific American'' is owned by Springer Nature, which in turn is a subsidiary of Holtzbrinck Publishing Group. History ''Scientific American'' was founded by inventor and publisher Rufus Porter (painter), Rufus Porter in 1845 as a four-page weekly newspaper. The first issue of the large format newspaper was released August 28, 1845. Throughout its early years, much emphasis was placed on reports of what was going on at the United States Patent and Trademark Office, U.S. Patent Office. It also reported on a broad range of inventions including perpetual motion machines, an 1860 device for buoying vessels by Abraham Lincoln, and the universal joint which now can be found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Car
An electric car, battery electric car, or all-electric car is an automobile that is propelled by one or more electric motors, using only energy stored in batteries. Compared to internal combustion engine (ICE) vehicles, electric cars are quieter, have no exhaust emissions, and lower emissions overall. In the United States and the European Union, as of 2020, the total cost of ownership of recent electric vehicles is cheaper than that of equivalent ICE cars, due to lower fueling and maintenance costs. Charging an electric car can be done at a variety of charging stations; these charging stations can be installed in both houses and public areas. Worldwide, 6.6 million plug-in electric cars were sold in 2021, more than doubling 2020 sales, and achieving a market share of 9% of the global new car market. All-electric cars represented 71% of plug-in car sales in 2021. , 16 million plug-in electric cars were on the world's roads. Many countries have established government ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steering
Steering is a system of components, linkages, and other parts that allows a driver to control the direction of the vehicle. Introduction The most conventional steering arrangement allows a driver to turn the front wheels of a vehicle using a hand–operated steering wheel positioned in front of the driver. The steering wheel is attached to a steering column A column or pillar in architecture and structural engineering is a structural element that transmits, through compression, the weight of the structure above to other structural elements below. In other words, a column is a compression member. ..., which is linked to rods, pivots and gears that allow the driver to change the direction of the front wheels. Other arrangements are sometimes found on different types of vehicles; for example, a tiller or rear-wheel steering. Tracked vehicles such as bulldozers and tanks usually employ differential steering, where the tracks are made to move at different speeds or even in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gear Train
A gear train is a mechanical system formed by mounting gears on a frame so the teeth of the gears engage. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission of rotation from one gear to the next. Features of gears and gear trains include: * The gear ratio of the pitch circles of mating gears defines the speed ratio and the mechanical advantage of the gear set. * A planetary gear train provides high gear reduction in a compact package. * It is possible to design gear teeth for gears that are non-circular, yet still transmit torque smoothly. * The speed ratios of chain and belt drives are computed in the same way as gear ratios. See bicycle gearing. The transmission of rotation between contacting toothed wheels can be traced back to the Antikythera mechanism of Greece and the south-pointing chariot of China. Illustrations by the Renaissance scientist Georgius Agricola show gear trains with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanical Engineer
Mechanical may refer to: Machine * Machine (mechanical), a system of mechanisms that shape the actuator input to achieve a specific application of output forces and movement * Mechanical calculator, a device used to perform the basic operations of arithmetic * Mechanical energy, the sum of potential energy and kinetic energy * Mechanical system, a system that manages the power of forces and movements to accomplish a task * Mechanism (engineering), a portion of a mechanical device Other * Mechanical (character), one of several characters in Shakespeare's ''A Midsummer Night's Dream'' * A kind of typeface in the VOX-ATypI classification See also * Machine, especially in opposition to an electronic item * ''Mechanical Animals'', the third full-length studio release by Marilyn Manson * Manufactured or artificial, especially in opposition to a biological or natural component * Automation, using machine decisions and processing instead of human * Mechanization, using machine labor i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
