Abstract: A visible image magnetic card employing a magnetic recording sheet having a sandwich of a magnetic recording layer and a base sheet. A display sheet has a transparent display area with a display cell is formed between the display sheet and the magnetic recording sheet. The cell houses a mixture of magnetic particles and a transparent or translucent fine fluidizing powder.

Abstract: In an apparatus for counting enumeration input pulses according to the present invention, an enumeration input pulse is put in parallel in a plurality of stages of logical product computing oscillator means, and counting in the logical product computing oscillator means of the subsequent stage is advanced on condition that an output of termination of counting is put out from the logical product computing oscillator means of the precedent stage. For this purpose, delay means is arranged after the logical product computing oscillator means to set the time from the point of output of the logical product computing oscillator means of the precedent stage to the point of termination of a predetermined delay time so that this time is longer than the width of the enumeration input pulse and shorter than the frequency thereof.

Abstract: According to the load-driving switch circuit monitoring system of the present invention, on-off control of a switch circuit connected to in a circuit in series for driving an electric load is performed according to a fail-safe input signal Si, and conduction or non-conduction of the switch circuit is detected based on a load current in the driving circuit. An input signal converter and a load current signal converter, each of which puts out two different voltage values according to the input signal and load current detection signal and a signal of a problem of the converters per se, are arranged. A monitor signal generator is disposed to monitor only the normal correspondence relation (S) between the input signal Si and load current in the normal function state of the switch circuit among said three outputs generated by each converter.