Dictionary

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Machine drawn cylinder sheet glass

A type of flat glass developed with a new technology, which was invented at the beginning of 1900s. The technology made it possible to draw molten glass directly from the melting tank. Cylinders of glass (12 m) were drawn vertically from a circular tank. The glass was then annealed and cut into 2 to 3 m cylinders. These were cut lengthways, reheated, and flattened. More or less visually disturbing ‘draw stripes’ would appear in the glass.

Modernist window

A window from the architectural period Modernism about 1940-1980. The characteristic window from this period is not a single window in a sash but complete facades with ribbon windows. See curtain wall.

 

Mortise hinge

A hinge, mortised into a slot made by a special tool, in the frame and the frame/casement respectively. Also called Butt hinge.

Mortuary window

A window from which the mullion could be easily removed enabling a coffin to get through. Same construction as the fire escape window.

Mullion

The thick vertical structure dividing the window opening. The piece on which a casement window strike.

Muntin

A wooden or metallic strip used to support or separate panes of glass in windows and doors. A cross section of the muntin shows an H shape, the panes fitted to the “top” and the “bottom” of the H. Also called glazing bar. If made of lead the strips are called lead work.