Conoid
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In geometry a conoid is a ruled surface, whose rulings fulfill the additional conditions:
conoid in architecture
conoids in architecture
Ruled surface
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In geometry, a surface S in 3-dimensional Euclidean space is ruled if through every point of S, there is a straight line that lies on S. Examples include the plane, the lateral surface of a cylinder o
Conoid
…In geometry a conoid (from Greek κωνος 'cone' and -ειδης 'similar') is a ruled surface, whose rulings (lines) fulfill the additional conditions: The conoid is a right conoid if its axis is perpendicular to its directrix plane. Hence all…
Cooling hyperbolic towers at Didcot Power Station, UK; the surface can be doubly ruled.
Doubly ruled water tower with toroidal tank, by Jan Bogusławski in Ciechanów, Poland
A hyperboloid Kobe Port Tower, Kobe, Japan, with a double ruling.
Hyperboloid water tower, 1896 in Nizhny Novgorod.