| 摘要 |
<p>Rectangular base mounting-platform structures for removable combat-equipment, for example, guns and other support units like radar which are mounted on rectangular openings on a ship deck, are provided with interchangeability. In order to achieve interchangeability of units which have mounting-platform structures of unequal size, the platform rectangular dimensions as well as the dimensions of the corresponding rectangular openings are so designed that the base length of the smallest unit is made equal to the width of the next bigger rectangle and so forth; in order to mount the smallest rectangular base on the immediate next larger rectangular opening, the length of the smallest rectangular base is aligned with the width of the larger opening; mounting is so done as to leave an open space towards only one side, leaving only one longer side of the smallest rectangular base unsupported within the area of the mounting opening. The unsupported side is supported by a beam running under the mounting opening, which beam transfers the load to other structure which reinforces the rectangular opening. An area of the rectangular opening which is thus left uncovered is covered by a suitable covering member. The mounting of the rectangular base structure, and the covering member, as well as the ends of the beam, are provided with sealing members to render the platform-structure impervious. Three consecutive rectangular sizes are preferred wherein the width of a rectangle is the same as the length of the immediate smaller rectangle.</p> |
