| 摘要 |
<p>502,279. Pipe couplings. FABBRICA ITALIANA MAGNETI MARELLI. Jan. 17, 1938, No. 1542. Convention date, Jan. 18, 1937. [Class 99 (i)] A coupling, e.g. for connecting the brake pipes of a tractor vehicle to those of a trailer, comprises double-bored members 1, 20 on the tractor and on the ends of the trailer pipe respectively, the member 20 being provided with diametrically opposed projections 24, 25 for normal engagement by a hook seat 9, in a fulcrum-like manner, and a pivoted locking lever 11, controlled by a spring-pressed slide 13, on the member 1. The arrangement is such that, should the draw-bar connection between the vehicles fail, the two flexible pipes connected to the member 20 will assume a horizontal position and exert a pull thereon, first causing the lever 11 to pivot against the pressure of its spring 15 and release the projection 25, and then permit. ting the said member to fall under its own weight to effect disengagement of the hook 9 and projection 24, the coupling thus being disconnected. The member 1 is provided with spring-pressed valves 6 adapted to be opened during the coupling operation by pins 8 on the member 20, and the abutting faces of the two members are fitted with packings 5, 23. The member 1 is preferably provided with a switch, constituted by a shoulder 13<1> on the slide 13 and a fixed contact 16, which is responsive to movements of the lever 11 for closing the circuit of signalling apparatus when the coupling breaks.</p> |
