| 摘要 |
<p>1,020,997. Fusible cut-outs; protective systems. STANDARD TELEPHONES & CABLES Ltd. May 8, 1964 [May 14, 1963], No. 19216/64. Headings H2G and H2K. An electrical fuse comprises a short length of fuse wire between two terminals 1<SP>1</SP> and 3<SP>1</SP>, which is fusible to open the circuit containing the capacitor C and is arranged so that if an arc is formed by the fusing of this wire this is diverted so that current flows between terminals 1<SP>1</SP> and 2<SP>1</SP>, thus by-passing the capacitor. A helically wound insulated wire is connected to terminal 2<SP>1</SP> which is thereby initially insulated from terminals 1<SP>1</SP> and 31, but when arcing occurs the insulation is burned away and the arc is diverted to terminal 2. The transistor TS, in the circuit is thus protected from discharge-current pulses formed by a short circuit in the load circuit B.</p> |
