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Photographer's Note

I like bridges, all kind of them, from roman ones to Calatrava’s works, being my preferred iron drawbridges, as this one still working in Buenos Aires

A little history

It is a bascule bridge built by the firm Lindeberg, Mellen & Co., it opened more than 100 years ago, on July 30, 1908.
Its design responds to the "Scherzer" type, of American origin from the late nineteenth century, whose peculiarity is that the mobile part or drawbridge stretch back while rotating, that is, the fictional axis of rotation (pivot) is movable horizontally, back in the opening and closing moving on. This is distinctive compared to usual drawbridge that rotates on a hinge (or pivot)
Its unique mechanical beauty - structural and the fact of being one of the few ones that are active in the world today, giving it a considerable historical interest
It was originally constructed for the purpose of being used for the passage of trams, so the road was composed of a wooden planking and two traffic lanes

More Details
The lift system was conceived by counterweights and driven sprockets through an electromechanical system many gears and two gear motors, capable of rotating the wheels on the lower rack, while the counterweight retreated and descended. Synchronization was achieved by a shaft mechanically linking both lateral systems.

Currently, the electromechanical drive system, mainly by the increasing traffic of big vans heavy loaded, was replaced by a hydraulic drive system, it consists of two pistons traction electronically regulated by proportional control valves which ensure load balancing drive, synchronization, currently, is electronics and not mechanics

ktanska, jean113, ikeharel, macjake, jemaflor, danos, holmertz, adramad, PiotrF, ourania, Didi has marked this note useful

Photo Information
  • Copyright: Maria Ocampos (nikkitta) Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 2087 W: 17 N: 4178] (17070)
  • Genre: Places
  • Medium: Color
  • Date Taken: 2014-09-12
  • Categories: Architecture
  • Exposure: f/3.2, 1/750 seconds
  • More Photo Info: view
  • Photo Version: Original Version
  • Date Submitted: 2015-07-14 12:28
Viewed: 1695
Points: 40
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Additional Photos by Maria Ocampos (nikkitta) Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 2087 W: 17 N: 4178] (17070)
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