| 摘要 |
<p>995,275. Door operating appliances. G. D. PETERS & CO. Ltd. Aug. 10, 1962 [Sept. 26, 1961], No. 34465/61. Heading E2M. A sliding door mechanism is operated by a fluid motor comprising an operating cylinder having two parts 10, 11 of different diameters, two pistons 12, 18 with diameters corresponding to the two parts of the cylinder and connected together by a piston rod 15, and a push rod 21 having one end mechanically connected to the sliding door mechanism and the other end disposed in operative engagement with the piston 12 of larger diameter. The push rod may abut the piston 12, as shown, so that movement of the piston assembly to the left effects movement of the door whilst movement of the assembly to the right leaves the door free for manual operation, or alternatively the push rod may be positively secured to the piston so that the door is power-operated in both directions. Compressed air is admitted to the cylinders through apertures 19, 20. The push rod moves in a fixed tubular support 22 and is attached to a rack 9 meshed with a pinion 8 rigidly connected to a helical grooved pulley 5 around which is wound the operating cable (not shown) connected to the door. Specification 976,748 is referred to.</p> |
