Electronic firing device for missiles

Claim 1

An electric firing device for missiles, comprising a source of energy, means for applying the energy to an electric primer, said applying means comprising time delay means for controlling firing after a determined time interval, counted from the appearance of a control signal, an electronic memory for storing a pulse value defining said time interval, and an input circuit to receive a signal representing said time interval, wherein said input circuit is connected to a coded selective filter supplying to the memory a coded pulse value defining said time interval, and said time delay means comprises an oscillator supplying clock signals, a coding circuit receiving the clock signals and transferring them into the same code as that of the coded signal applied to the memory, a comparator connected to the memory and to the coding circuit to supply a firing signal when there is a coincidence, said energy source supplied through said input circuit to an accumulator chargeable before use of the missile, said input circuit comprising means for receiving input signals which supply energy to the accumulator and represent said time interval, said coded selective filter being disposed between said receiving means and said memory and allowing passage to said memory of signals of relatively high frequency which represent said time interval, and a second filter disposed between said receiving means and the accumulator, said second filter allowing passage of signals of relatively low frequency which supply charging energy to the accumulator.