A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit‚ one leg of which includes the unknown component. Its operation is similar to the original potentiometer. It was invented by Samuel Hunter Christie in 1833 and improved and popularized by Sir Charles Wheatstone in 1843. One of the Wheatstone bridge’s initial uses was for the purpose of soils analysis and comparison.[1] -------------------------------------------------
Premium Resistor Electrical resistance Electric current
Balls Bridge and Truss Bridges: A Brief Historical Overview Nathan Holth Foreword: I composed this brief and informal overview of truss bridges and Balls Bridge to put this beautiful historic bridge ’s history and significance into context. A version of this document with full-color photos is available on my website ’s Balls Bridge Page located at www.historicbridges.org/ontario/balls/index.htm which also has more information and photos. The general truss bridge information in this document was
Premium Bridge Truss
Bridge Failure Studies and Safety Engineering 2.1 HISTORY OF DISASTERS AND SAFETY MANAGEMENT 2.1.1 Unexpected Material Deterioration and Failure Engineering is usually about avoiding failures and investigating why failures occur and ways to fix the problem. There is a need to understand the conditions giving rise to past failures and ways to avoid such failures so that loss of life can be minimized. Historical events and selected case stud-ies demonstrate the causes of
Premium Bridge Structural engineering Bridges
The Brooklyn Bridge is one of the most famous and iconic bridges in the United States along with The Golden Gate Bridge. The initial planning of this bridge took place in 1867 when New York State Senate approved a legislation about a New York Bridge Company and the largest suspension bridge project. The construction of the bridge started in 1869 by the designer and chief engineer John Roebling and officially opened for public on May 24‚ 1883. At that time‚ Brooklyn Bridge was considered the longest
Premium World War II Nazi Germany Adolf Hitler
The Brooklyn Bridge The Brooklyn bridge in its days was the biggest‚ most famous bridge in the world‚ it had the most beautiful suspension bridges and the most dramatic testament yet to American technical ingenuity and daring. The bridge indicated that there was no place like New York‚ no place like American in the 19th century .The heroic history of the Brooklyn Bridge and its construction is well known‚ its position in the American life is remarkable ‚as is the infinitely unprecedented structure
Premium
Padma Bridge 1 Padma Bridge Padma Multipurpose Bridge Carries Crosses Locale Maintained by Designer Design Material Total length Width Motor vehicles‚ Railway Padma River Louhajong‚ Munshiganj to Shariatpur and Madaripur Bangladesh Bridge Authority Maunsell AECOM Truss bridge Steel 6‚150 m (20‚180 ft) 21.1 m (69 ft) Bangladesh Construction begin expected in 2013 Construction end Coordinates expected in 2016 23°25′21″N 90°18′35″E The Padma Bridge is a multipurpose road-rail bridge across
Premium Bangladesh Economic development
Bridge Structures and The Use of Geometry in Their Design What is a bridge? A bridge is a structure providing continuous passage over a body of water‚ roadway‚ or valley. Every bridge looks different from the another. Their bridge structure is different. There are nine types of main bridges. Bridge engineers use a lot of geometry to help them design the different bridges. Without geometry‚ the bridges would not be safe. Bridges have been around for a long time. The earliest bridges
Premium Bridge
When people in the United States today hear the term "London Bridge‚" they are most likely to think of one of the most peculiar sights anywhere within the United States that of the London Bridge in Lake Havasu City‚ Arizona. Surrounded by faked-up Tudor buildings and busloads of tourists‚ the large bridge is dwarfed by the majesty of the desert Southwest. The entire enterprise stands as a monument to a deep human appreciation for irony‚ for what else could explain the immense cost and energy that
Premium Bridge City of London Bridges
“BROOKLYN BRIDGE” The Brooklyn Bridge’s construction is one of the great achievements in United States history and helped pave the way for New York City’s rapid expansion in the 19th and 20th centuries. It was an undertaking that required extraordinary effort‚ sacrifice and ingenuity by its designers as well as its builders to complete. Its completion was a feat of engineering that was unmatched in its time: it was the longest suspension bridge – the first to use steel-wire – and dominated the New
Premium New York City Manhattan Suspension bridge
railway bridges because it made good use of iron. The Pratt has many variations‚ most with their own unique name. For instance‚ the Baltimore‚ Pennsylvania‚ and the Parker are all based off the Pratt. Pratt Truss How the forces are spread out Here are two diagrams showing how the forces are spread out when the Pratt Truss is under a load. The first shows the load being applied across the entire top of the bridge. The second shows a localized load in the center of the bridge. In both
Premium Truss Bridge