Abstract: A safe-arm system for an explosive munition is provided which is in the form of a charge transfer circuit, including a low-voltage capacitor bank which over a relatively long period of time is charged by an associated air turbine. After being charged up, this charge is transferred to a transinductance by a transinductance to convert the low voltage to a high voltage. By the use of a multiplicity of transfer steps, which occur over a very short period of time, the size and weight of the transinductance can be small.

Abstract: Electrical circuit continuity test apparatus for the high energy discharge circuitry of a firing unit couples to the stripline transmission line of the discharge circuitry but adds minimal inductance to the circuit. This is achieved by a coupling transformer having a core of high magnetic permeability alloy which loops around one of the strip conductors of the stripline. The primary winding, which couples into test circuit is merely another conductor wrapped around this core. The primary winding senses the reflected capacitive impedance of the discharge circuitry which includes an added capacitor to bypass the high energy switch of the discharge circuitry.Impedance sensing is accomplished by a resistance bridge driven by an oscillator and where imbalances indicating a defective circuit are sensed by a synchronous demodulator and a window comparator.

Abstract: A high energy switching circuit for an initiator, for example, an exploding bridgewire (EBW) or slapper-type detonator, includes a charged capacitor which is placed across a pair of series diodes connected in a reverse standoff voltage mode with respect to the capacitive voltage in series with an EBW initiator circuit. A switching field effect transistor is connected in shunt across the lower diode. In the armed condition, the pair of diodes clamp the high energy capacitor voltage at their reverse avalanche voltage. Upon the activation of the switching transistor, the capacitor voltage is impressed across the upper diode and a high reverse current flows through the upper diode placing it in destructive conduction which immediately also forces the other diode into destructive conduction to complete the series circuit from the capacitor to the EBW or slapper detonator. The circuit comprises low cost components and features very good firing simultaneity between similar firing circuits.

Abstract: A control apparatus for processing the electrical signals generated by an optical ratiometric color sorting scanner, said apparatus generating signals to cause the rejection of articles which differ in color and/or size from predetermined limits. In the scanner, two electrical signals are generated which are responsive to two different spectral regions or pass bands of the radiant energy reflected by the product being sorted. These signals are superimposed on a slowly varying signal responsive to the standing background light. The control circuitry processes the signals to delete the standing light signal and spurious noise signals and determines if the ratio between the signals is greater than or less than a predetermined value, or alternatively, determines when the ratio between the signals is not within a predetermined acceptable range and generates a delayed reject signal thereafter. Other circuits provide signals to a meter for displaying the present reject rate and particle feed rate.