Controllable detention window

Details Controllable detention window Controllable detention window

1982-08-26

1984-12-04

Kannan, Philip C.

Movable or removable closures

Registerable opening in facially opposed closure and barrier

49 50, 49 90, 49 95, E06B 702

Patent

active

044855893

ABSTRACT:
A window assembly for controlling light and ventilation and preventing undesired passage through the window opening has spaced horizontal fixed slats, spaced horizontal movable slats which may be moved vertically to partially or wholly close the spaces between the fixed slats, and vertically spaced tool steel bars extending across the window opening and anchored at their ends in the building structure in which the window assembly is mounted.

REFERENCES:
patent: 411972 (1889-10-01), Stoeppelwerth
patent: 629680 (1899-07-01), Hamalian
patent: 1050010 (1913-01-01), Donnell
patent: 1615632 (1927-01-01), Kinneal
patent: 1950218 (1934-03-01), Bierbach
patent: 1986713 (1935-01-01), Clark
patent: 2123751 (1938-07-01), Sigal
patent: 2474152 (1949-06-01), Levy
patent: 3113355 (1963-12-01), Tracy et al.
patent: 3412506 (1968-11-01), Shiota
patent: 3460289 (1969-08-01), Toth

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