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Wooden blocks with letters isolated on white background. Wooden blocks with letters isolated on white background

Looking into the Top of Tide Predicting Machine No. 2

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. Along the top of the photo, connecting shafts drive slotted yoke cranks on both sides of the machine. 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 National Oceanic and Atmospheric Administration (NOAA) occasionally displays the machine at its facility in Silver Spring, Maryland. 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. Along the top of the photo, connecting shafts drive slotted yoke cranks on both sides of the machine. 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 National Oceanic and Atmospheric Administration (NOAA) occasionally displays the machine at its facility in Silver Spring, Maryland.

Chat word on 3d board

Wooden blocks with letters isolated on white background. Wooden blocks with letters isolated on white background

Summation Chain

The summation chain runs around pulleys on Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. The pulleys move up and down and the chain sums their displacements to compute the height or time of high and low tides. 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.

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

Portable computer for anyone to anywhere. Portable computer for anyone to anywhere

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

CPU or Central Processing Unit with Blue Color in front of the chase. CPU or Central Processing Unit with Blue Color in front of the chase

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

Hard Disk Internal

Heart of the hard disk

Details of the hard disk. Details of the hard disk

The robot works on the computer

Disk mirroring for protection. Disk mirroring for protection

Compute mouse in hand

Compute mouse in hand isolated in white

Hands counting - 1

Body language - woman's hands counting - 1

Mathematical Ruler

Macro shot of specialized Mathematical Ruler with focus on spherical volume and area.

Detail of harddisk

3d rendered image with abacus on white

Secure Information Technology Background

A background showing a lock and computer tech background elements. A background showing a lock and computer tech background elements.

Hard disk drive

Close up of the opened Hard disk drive .

Computer harddisk isolated. including clipping path. Computer harddisk isolated. including clipping path.

Compute doctor

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

A calculator macro

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

Notebook compute

Notebook computer with leather by black bag for carrying purposes

A small calculating device on a white background. A small calculating device on a white background

Computer case with supply cord in hand

Opened computer case with screws. Opened computer case with screws

Computer plate background

Computer plate background-the container of a hard disk on closer examination

A pile of compact discs

Shinny valentine hearts with tiny stars on red background. Shinny valentine hearts with tiny stars on red background

Laptop notebook

The keyboard of a lap top note book. The keyboard of a lap top note book

Laptop computer screen mockup using hand up

Computer plate background

Computer plate background-the container of a hard disk on closer examination

A calculator macro

Mechanically Adding Trigonometric Functions

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.

3d rendered image with abacus on white

White Tablet Compute Near Eyglasses

White Tablet Compute Near Eyglasses

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

CPU or Central Processing Unit with Silver and blue Color in front of the chase. CPU or Central Processing Unit with Silver and blue Color in front of the chase

Number on the golden eggs

Room on the golden eggs on a white background. Room on the golden eggs on a white background

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

3d rendered image with abacus on white

Open word on 3d board. Open word on 3d board

Coding code program compute coder develop developer development

Coding code program compute coder develop developer development

Shinny valentine heart on a red layered background. Shinny valentine heart on a red layered background

Woman at laptop. Woman at laptop

Compute doctor

A joystick isolated on white space showing top button and view

Abacus amusement tool in white background vector eps

CPU or Central Processing Unit with Red Color in front of the chase. CPU or Central Processing Unit with Red Color in front of the chase

A joystick isolated on white space with a man's hand reaching for it

Ai robot think or compute

Ai robot think or compute

A calculator macro

Businessman in front of compute and get idea from internet

Businessman in front of compute and get idea from internet

Programmer working On Computer In IT Office Typing Data Coding in software and checking code on computer screen

Programmer working On Computer In IT Office Typing Data Coding in software and checking code on computer screen

Shinny valentine heart on a red layerd background. Shinny valentine heart on a red layerd background

Safe word on 3d board. Safe word on 3d board

A calculator macro

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