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These components perform key computations for Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. The tide prediction formula implemented by the machine includes the addition of a series of cosine terms. The triangular metal pieces are part of slotted yoke cranks which convert circular motion to a vertical motion that traces a sinusoid. Each slotted yoke crank is connected by a shaft to a pulley, which causes the pulley to follow the sinusoidal motion. A chain going over and under pulleys sums each of their deflections to compute the tide. The U.S. government used Tide Predicting Machine No. 2 from 1910 to 1965 to predict tides for ports around the world. The machine, also known as “Old Brass Brains,” uses an intricate arrangement of gears, pulleys, chains, slides, and other mechanical components to perform the computations. A person using the machine would require 2-3 days to compute a year’s tides at one location. A person performing the same calculations by hand would require hundreds of days to perform the work. The machine is 10.8 feet (3.3 m) long, 6.2 feet (1.9 m) high, and 2.0 feet (0.61 m) wide and weighs approximately 2,500 pounds (1134 kg). The operator powers the machine with a hand crank. These components perform key computations for Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. The tide prediction formula implemented by the machine includes the addition of a series of cosine terms. The triangular metal pieces are part of slotted yoke cranks which convert circular motion to a vertical motion that traces a sinusoid. Each slotted yoke crank is connected by a shaft to a pulley, which causes the pulley to follow the sinusoidal motion. A chain going over and under pulleys sums each of their deflections to compute the tide. The U.S. government used Tide Predicting Machine No. 2 from 1910 to 1965 to predict tides for ports around the world. The machine, also known as “Old Brass Brains,” uses an intricate arrangement of gears, pulleys, chains, slides, and other mechanical components to perform the computations. A person using the machine would require 2-3 days to compute a year’s tides at one location. A person performing the same calculations by hand would require hundreds of days to perform the work. The machine is 10.8 feet (3.3 m) long, 6.2 feet (1.9 m) high, and 2.0 feet (0.61 m) wide and weighs approximately 2,500 pounds (1134 kg). The operator powers the machine with a hand crank.

"The Citroën 2CV (French: "deux chevaux" i.e. "deux chevaux-vapeur" (lit. 'steam horses'), "two tax horsepower") was an economy car produced by the French car manufacturer Citroën between 1948 and 1990. It was technologically advanced and innovative, but with uncompromisingly utilitarian unconventional looks, and deceptively simple Bauhaus and Junkers early all metal aircraft inspired bodywork (corrugated for added strength without added weight), that belied the sheer quality of its underlying engineering. It was designed to motorise the large number of small-holder farmers in 1930s France, who were still using horses and carts. It is considered one of Citroën's most iconic cars. In 1953 Autocar in a technical review of the car wrote of "the extraordinary ingenuity of this design, which is undoubtedly the most original since the Model T Ford". It was described by Car Magazine journalist and author L. J. K. Setright as "the most intelligent application of minimalism ever to succeed as a car". It was designed for low cost, simplicity of use and maintenance, versatility, reliability, low fuel consumption and off-road driving. For this it had a light, easily serviceable engine, extremely soft long travel suspension (with height adjustment by lengthening/shortening of tie rods) high ground clearance, and for oversized loads a car-wide canvas sunroof, which (until 1955) also covered the boot. During a production run of 42 years between 1948 and 1990, 3,872,583 2CVs were produced, plus 1,246,306 Fourgonnettes (small 2CV delivery vans), as well as spawning mechanically identical vehicles including the Ami: 1,840,396; the Dyane: 1,444,583; the Acadiane: 253,393; and the Mehari: 144,953, a grand total of 8,756,688, of which there are still 3,382 on the road in the UK as of January 2013. From 1988 onwards, production took place in Portugal (Mangualde) rather than in France. This arrangement lasted for two years until 2CV production halted. Portuguese built cars, especially those from when production was winding down, have a reputation in the UK for being much less well made and more prone to corrosion than those made in France. Paradoxically the Portuguese plant was more up-to-date than the one in Levallois near Paris, and Portuguese 2CV manufacturing was to higher quality standards" Source: Wikipedia en.wikipedia.org/wiki/Citro%C3%ABn_2CV

Wright Brothers Day on December 17th Template Hand Drawn Cartoon Illustration of the First Successful Flight in a Mechanically

Wright Brothers Day on December 17th Template Hand Drawn Cartoon Illustration of the First Successful Flight in a Mechanically

Antiquity coffee machine with Beans

Studio Photo Antiquity coffee machine with Beans

Monitoring of mechanically ventilated patient

Monitoring of mechanically ventilated patient

Oculus PATH Station Hub 3D Virtual Reality Photo 3

Oculus PATH Station Hub 3D Virtual Reality Photo 3

Harvested onions drying in long rows on the field

Harvested onions drying in long rows on the field

Large circular tanks with mechanically driven scrapers

Large circular tanks with mechanically driven scrapers

Old coffee mill with Beans inside the mill. Old coffee mill with Beans inside the mill

the shaft of the electric motor is mechanically processed in production

the shaft of the electric motor is mechanically processed in production

Three grey 3d gears, cog

Antiquity coffee machine

Studio Photo Antiquity coffee machine

Antiquity coffee machine

Studio Photo Antiquity coffee machine

Types of ion channel

Types of ion channel

Vintage Tax Disc

Vintage Tax Disc

Close up of vintage typewriter key, question mark key

Black and Gray Vintage Cash Register

Black and Gray Vintage Cash Register

Tractor on the siberian mountain road

British Semaphore Home Signal

British semaphore Home Signal on a gantry set against a blue sky

Tractor on the mountain road

Tractor on the siberian mountain road. Tractor on the siberian mountain road

Tractor on the siberian mountain road

Mechanically propelled vehicle tax disc. Mechanically propelled vehicle tax disc

mowed mechanically the grass in the clearing, parallel tracks run in rows. puddle in the foreground

mowed mechanically the grass in the clearing, parallel tracks run in rows. puddle in the foreground

Gears or cogs into a mechanically clockwork

Gears or cogs into a mechanically clockwork

Three-dimensional graphic representation. gear. 3d

Chairlift engineering

Chair are mechanically brought up the mountain. Chair are mechanically brought up the mountain

Paraguayan worker at work in bricks factory

Paraguayan worker at work in bricks factory

Top view of old coffe mill gear. Top view of old coffe mill gear

Building,metalworking instruments, and screws on white background

Mechanically driven scrapers in sedimentation tank

Mechanically driven scrapers in sedimentation tank

Machine tools with Computer Numerical Control - CNC

Machine tools with Computer Numerical Control - CNC

Oil pumpjack winter work is the overground drive for a reciprocating piston pump in an oil well. It is used to mechanically lift

Oil pumpjack winter work is the overground drive for a reciprocating piston pump in an oil well. It is used to mechanically lift

Old coffee machine

Old wooden coffee machine isolated. Old wooden coffee machine isolated

Black Typewriter Keys

Black Typewriter Keys

Solar panels and wind energy turbine power station

Solar panels and wind energy turbine power station

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