GB1231469A - - Google Patents

Abstract

1,231,469. Pantographs for electrically propelled railway vehicles. VSESOJUZNY ORDENA TRUDOVOGO KRASNOGO ZNAMENI NAUCHNO - ISSLEDOVATELSKY INSTITUT ZHELEZNODOROZHNOGO TRANSPORTA. 16 May, 1968, No. 23246/68. Heading B7L. The contact shoe 3 is carried by a pair of frames 1 secured to shafts 2 acted on by levers connected to a tension spring 4 so that the frames 1 are biased to a raised position, the shafts 2 being pivoted (as shown) to a platform 13 supported by a scissors lever system 10, or directly to the levers of a parallelogram or polygon lever system, Figs. 2 and 3 (not shown), the levers 10 being pivoted to the platform 13 and to an insulated base and to the piston-rod of a pneumatic lifting cylinder 16, air being supplied to the cylinder 16 (so as to raise the platform 13) via a flexible hose 25, a slide valve 17, and a flexible hose 22, when the frames are raised so much that the member 21 of the slide valve 17 is forced into the valve 17 clear of the hose 25. The cylinder 16 is vented to the atmosphere (so as to lower the platform 13) when the frames are lowered so much that the member 21 is pulled out of the valve 17 clear of the hose 25. When the vehicle is being connected to or disconnected from an overhead conductor system, the frames 1 are raised and lowered by a pneumatic cylinder 5 and spring 6 acting on a shaft 2.