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Side-light.


Nautical.) A plate of glass in a frame fitted to an air-port in a ship's side, to admit light. It is thrown open for ventilation, and closed when necessary to exclude water.

Side-lights.

In Fig. 5068, A, the glass a is inclosed in a circular frame, having teeth gearing with a rack on the inside of a metallic box; it is rolled to one side to open the port, and is made water-tight, when closed, by an elastic packing in the frame.

B The light a is held in position by screws entering proper apertures in the vessel side; the screws are provided with collars b b, which prevent them from falling out when the frame c inclosing the light is removed

C. The lightframe d is hinged to the vessel's side, and is held when closed by a screw.

D. The frame is conical, fitting in an opening of corresponding shape, and is held in place by screws

E. The face of the port-rim has one or more annular grooves e e corresponding to ridges on the light-frame, so fitting as to make a water-tight joint. It turns on a hinge, and is closed by a screw.

F. The frame turns on a hinge, and is held in closed position by a lever-catch f, having an interior screw by which the packing may be compressed as tightly as required.

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