| 摘要 |
627,570. Electromagnetic c relays. VIGREN, S. D., and HOLMQVIST, N. E. F. June 13, 1946, Nos. 17782, 17783, 17784 and 17785. Convention dates, June 13, 1945, Sept. 8, 1945, Sept. 22, 1945 and Feb. 26, 1946. [Class 38 (v) ] Contact spring assemblies for switching devices are made by placing the springs in a supporting device or jig (not shown), pressing an insulating member, such as a rod or plate, against edges formed in the springs in such a way that the edges penetrate said member, and finally removing the supporting device. In one arrangement, initially-curved insulating plates 5, 6, are pressed against edges 3a, 3b, 4a, 4b in contact springs 1, Fig. 4, and fixing springs 14, 15, until the edges penetrate the plates which assume the position shown in full lines. The assembly may be held together by bent metal plates 7, 8 having cooperating recesses and lips 9, 10, the plates 7, 8, may, when applied, serve also as the means whereby the members 5, 6 are pressed inwards. In Fig. 8, strips 18, 21 are placed in slots in the contact springs and forced towards the ends thereof, as shown. Alternatively, non-circular rods 31 may be inserted in similarly-shaped holes 26 in the springs and rotated to the position shown, so that the edges of the holes penetrate the rods, Fig. 13, a lug 33 and a slot 34 limiting relative rotation. Two spring assemblies may be mounted side-byside between a plate 50 and a plate 49 slidable on a relay bracket 35, Fig. 14, by means of a screw 57 passing through oval holes in the plates 49, 50. Modifications of the arrangement of Fig. 13 are set out with reference to Figs. 17-23 (not shown). |
