| 摘要 |
828,130. Magnetic relays. STANDARD TELEPHONES & CABLES Ltd. May 2, 1958 [May 9, 1957], No. 14053/68. Class 38 (5). A sealed magnetically-operable contact device is mounted with its ends in apertures 6, 13 in parallel magnetic plates 5, 12 which are oppositely polarized by a permanent magnet 14. The envelope 1 of the contact device is enclosed in a plastic tube 8 within a two-part magnetic shield 7, 9, the upper part 9 of which is movable so as to allow the flux to actuate the device. The device is mounted on an insulating plate 2 with its terminals 3, 4 connected to a printed circuit thereon. A number of contact devices, for actuation in this manner, may be arranged for operation either separately or in groups or in sequence by electromagnetic or manual means. As shown in Fig. 2, the contact devices may be mounted in the positions indicated by crosses and magnets 15, 16, 17 placed between the plates 5, 12 at their corners. Electromagnets may be used in place of the permanent magnets. |
