| 摘要 |
1,070,559. Soldering. AGA A.B. Dec. 10, 1964 [Jan. 10, 1964], No. 50283/64. Heading B3R. In soldering a contact shoe and its contained cable end to a metal surface wherein a metal stud having solder at its end is soldered into an aperture in the shoe and to the metal surface by striking an arc between the surface and the solder on the stud and forcing the stud into the solder melted into the aperture, the contact shoe and its contained cable end is proportioned to have a minimum volume W min and a maximum volume W max according to the formulµ wherein W = volume of contact end of the cable shoe and its contained cable end in cm.<SP>3</SP> A = cross sectional area of the solder on the stud in cm.<SP>2</SP> h = height of the solder on the stud in cm. K = melting temperature of the solder in kelvin degrees K 1 = melting temperature of contact shoe and metal in kelvin degrees k = constant lying between 0À2 and 0À26 depending on the solder used. The metal stud (4), Fig. 4 (not shown), is of brass with an end portion (5) of silver solder of Cu 19%; Zn 13-17%; Ag 42-46%; Cd 18-22% for which K = 0À2 and has a notched portion to facilitate breaking-off a -portion after soldering. The contact shoe is circular and is provided on the end of a cable (1) to be soldered to a rail (3). Other solders which may be used comprise Cu 16%; Zn 23%; Ag 49%; Mn 7% and Ni 5%, for which K = 0À2, Cu 50%; Zn 31%; Ag 12% and Cd 7% for which k = 0À22 and Cu 86%; Mn 10% and Co 4% for which k = 0À26. |
