| 摘要 |
<p>1,086,178. Electromagnets. J. GUTKOWSKI. Nov. 19, 1964 [Nov. 20, 1963; May 6, 1964], Nos. 45751/63 and 18813/64. Heading H1P. [Also in Divisions G3 and H4] An electro-hydraulic or -pneumatic transducer usable with hydraulic amplifiers to control the orientation of a platform &c. (see Divisions G2, G3 and H4) comprises three solenoids, only one of which is shown, spaced equally around a permanent magnet 18 suspended by a resilient bellows 19. Each solenoid comprises one or more coils 55 with core(s) 56 and polepieces 57, 58. As shown, differential excitation of the coils orientates a baffle 14 to vary the back pressure at three nozzles such as 28 spaced equally around magnet 18. The lower end of the magnet may have a rod (not shown) connected thereto at 63 for mechanically induced movement thereof. In a modification (Fig. 16, not shown), the magnet (418) has a jet tube (414) passing therethrough and secured at its upper end to the housing, the tube co-operating with three receiving orifices such as (430). In a further embodiment (Figs. 17 and 18, not shown), an annular armature (514) passes through three equally spaced coils such as (552) and is supported by non-magnetic sleeves (521, 522) by spring disc (519). Upper and lower triangular polepieces (557, 558) are provided together with a permanent magnet (518), and three projections such as (515) on the armature co-operate with respective nozzles such as (525). In a further embodiment (Fig. 19, not shown), the three coils surround a vertical cylindrical armature (918) which is in the form of a permanent magnet and which is freely movable in a horizontal plane to vary the back pressure of nozzles such as (920, 921).</p> |
