Cardan grille
The Cardan grille is a method of writing secret messages using a grid. (Wikipedia).
The Cardan grille is a method of writing secret messages using a grid. (Wikipedia).
Study of double Cardan universal joint 3
Double Cardan joints allow to adjust relative positions between the input and output shafts even during rotary transmission. This is case when the input and output shafts are skew. The joint loses the feature of velocity constant. The output velocity is not constant. See a 3D-printing pro
From playlist Mechanisms
FRESNEL LENS FIBER OPTIC OPTICAL CABLE Solar Lighting
This is a Spot Fresnel Lens focused on composite Fiber Optic Cable. This is a fiber optic ponytail.
From playlist THE FRESNEL LENS SOLAR POWER
Study of double Cardan universal joint 1a
Double Cardan drives allow to adjust relative linear positions between the input and output shafts even during rotary transmission. The output velocity is always equal to the input one (constant velocity joint) because their shafts are kept parallel each other. The pin axles on the interme
From playlist Mechanisms
Study of double Cardan universal joint 2a
Double Cardan joints allow to adjust angle A between input and output shafts even during rotary transmission. This case shows +/- 90 deg regulation and proves that double Cardan joints are of constant velocity. Due to the gear planetary drive of two gear sectors and orange crank, angle bet
From playlist Mechanisms
Study of double Cardan universal joint 2b
This is wrong case of a double Cardan joint: the pin axles on the yellow-violet intermediate shaft are perpendicular each other. Although due to the gear planetary drive of two gear sectors and orange crank, angle between input (or output) shaft and the yellow intermediate shaft is always
From playlist Mechanisms
Imaginary Numbers Are Real [Part 2: A Little History]
Want to learn more or teach this series? Check out the Imaginary Numbers are Real Workbook: http://www.welchlabs.com/resources. Imaginary numbers are not some wild invention, they are the deep and natural result of extending our number system. Imaginary numbers are all about the discovery
From playlist Imaginary Numbers are Real
Imaginary Numbers Are Real [Part 3: Cardan's Problem]
More information and resources: http://www.welchlabs.com Imaginary numbers are not some wild invention, they are the deep and natural result of extending our number system. Imaginary numbers are all about the discovery of numbers existing not in one dimension along the number line, but in
From playlist Imaginary Numbers are Real
Imaginary Numbers Are Real [Part 4: Bombelli's Solution]
More information and resources: http://www.welchlabs.com Imaginary numbers are not some wild invention, they are the deep and natural result of extending our number system. Imaginary numbers are all about the discovery of numbers existing not in one dimension along the number line, but in
From playlist Imaginary Numbers are Real
Stirring the Mandelbrot Set: a checkerboard
http://code.google.com/p/mandelstir/
From playlist mandelstir
Ramanujan Learned Math With This Book
In this video I will show you the book that the legendary Indian Mathematician Srinivasa Ramanujan used used to learn math. This is a very interesting book with tons of results. The book is titled A Synopsis of Elementary Results in Pure and Applied Mathematics Volume 1 and it was written
From playlist Book Reviews
The green inner shaft carrying a long eccentric rotates in a screen of cone shape. The later rotates in bearings supported by springs. The inner shaft and the screen are driven through double cardan joints (not shown). Link for downloading STEP files of this video: http://www.mediafire.com
From playlist Mechanisms
http://www.mekanizmalar.com This is a flash animation of a hydraulic closed center valve.
From playlist Pneumatic and Hydraulics
Mysteries of Math and the Langlands Program - Episode 2
The second in a series of 4 lectures by Edward Frenkel recorded at MSRI, Berkeley and broadcast on the Japanese TV channel NHK in the Fall of 2015 in the "Luminous Classroom" series. The lectures went from elementary topics such as Pythagoras theorem, prime numbers and symmetries to Galois
From playlist Mysteries of Math and the Langlands Program (4 episodes broadcast on the Japanese TV channel NHK)
The bearing and the slider of a linkage mechanism supported by springs can slide in a runway. The sieves are fixed to them. The red crank is driven through a double cardan joint (not shown). Inventor of this video: http://www.mediafire.com/download/fox1hpmyac0bk8e/VibrScreen3Inv.zip
From playlist Mechanisms