| 摘要 |
1. The set of pneumatic couplings for alternating engagement of ship power transmission system control signal switches, supported by bearings placed in casings, consisting in that it has a central chain wheel (1) and two side chain wheels (2) with two holes with axes parallel to the axes of chain wheels, in which small pistons (3) and springs (4) are fitted, the central chain wheel (1) being coupled only with one of the selected side chain wheels (2) through small pistons (3) moved by air pressure exerted on the pistons (3) of that wheel, whereas the second side chain wheel (2) can move against the central chain wheel (1), and there is no air pressure exerted on its pistons (3).<IMAGE>
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