| 摘要 |
681,586. Soldering. SVENSKA AKTIEBOLAGET GASACCUMULATOR. Nov. 3, 1950 [Nov. 3, 1949 ; Feb. 13, 1950], No. 26907/50. Class 83 (iv). A method of making a soldered joint between two metallic members in one of which an aperture is provided comprises inserting a metal pin consisting of two axially disposed parts with different melting- points, the part having the lower melting-point being melted to form, on solidification, a soldered joint between the high melting-point part of the pin and adjacent surfaces of the metallic members. For joining a metal plate 1 and a beam 2 an aperture is made in the plate 1 and a metal pin, comprising a part 3 of steel, brass or copper and a part 4 of solder (Fig. 2) is placed in an electric-arc apparatus and inserted in the aperture so as to rest on the beam 2. On initiation of the arc the solder part of the pin melts and forms, on solidification, a joint between the plate, beam and the pin. In another embodiment an electrical connector comprising a copper wire 5 having contact shoes 6 at each end is attached to a rail, beam, tube, &c. by inserting a metal pin 11 (Fig. 5) through an aperture 10 in the contact shoes and effecting a soldered joint as hitherto. The pin 11 may be of bronze having a solder portion 12 which carries a flux 13 in a recess covered by a lid 14 also of solder. An annular notch 15 in the pin enables the part 10 to be broken off after soldering. The contact shoes may be provided with a flux 17 (Fig. 8) which is retained between solder covers 18 and 18a pressed into the aperture below the surface 7. For this connection a pin of the type shown in Fig. 2 may be used. The cover 18 may be bowl-shaped to receive the flux and enclosed by a flat cover held by turning over the rim of the bowl-shaped cover 18. Specification 681,585 is referred to. |
