Abstract: A control circuit for driving solenoids protects these devices from failure due to overheating caused by frequent on-off cycling. Control signals are passed through logic gates. A timer responds to the termination of a control pulse and disables the logic gate that passes signals to the load for a predetermined time, thus restricting the minimum off time of the solenoid. Minimum on time or maximum on or off times are not affected.

Abstract: A control circuit for alternately actuating a pair of loads includes a voltage doubling circuit having a capacitor common to a pair of charge storage devices and switch means which are alternately actuated to discharge the charge storage devices through a pair of loads. Coupled to the circuit is a holding current power supply for maintaining the loads in an actuated position once the charge storage devices are discharged. The circuit thus provides an initially high current pulse for rapidly actuating inductive loads such as solenoids.

Abstract: An interface apparatus, for remotely controlling a plurality of solenoid actuated switching relays having first and second energizing coils, is capable of providing momentary first and second electrical signals respectively in response to an interruption of an input signal to the apparatus and the initiation of the input signal. The interface apparatus includes a first comparator sensing a change in the input signal, a second comparator sensing a change in the output of the first comparator so as to maintain the second comparator output 180 degrees out of phase with the first comparator output, and first and second monostable multivibrators that each have a trigger input connected to the output of a corresponding comparator so as to generate a momentary electrical signal when the trigger input senses a negative excursion in a change of state at the output of the corresponding comparator.

Abstract: A driving circuit for printing devices in an electric cash register comprising a pair of first diodes which are connected in series in the normal direction respectively with a journal printing magnet and receipt printing magnet paired with each other and are connected with each other, a first switching transistor connected between the connecting point of the pair of first diodes and a negative (-) terminal of a current source, a second diode connected in the reverse direction between said connecting point and a positive (+) terminal of the current source, a second switching transistor connected between a common feeding line to the journal printing magnets and the positive (+) terminal of the current source and a third switching transistor connected between a common feeding line to the receipt printing magnets and the positive (+) terminal of the current source, to simplify the circuit formation and reduce the manufacturing cost.

Abstract: A motor energizing control and reversing circuit designed to be used on a power seat control in vehicles. The circuit includes a reversible motor that primarily drives suitable gear trains which effect seat movement in a plurality of directions and then momentarily reverses the motor so as to apply moving power to the gear train in an opposite direction to relieve pressure thereon and prevent a locked rotor condition in which the seat could not be moved.

Abstract: A device for controlling a reverse time of a manuscript carriage, etc. for electrographic apparatuses is disclosed. The device comprises means for disengaging a forward movement electromagnetic clutch from a manuscript carriage or optical system driving mechanism and, after a lapse of time from the moment of disengaging the forward movement clutch from the manuscript carriage or optical system driving mechanism, for driving a backward movement clutch. The device is capable of effectively prevent the backward movement clutch and a carriage supporting plate, etc. from being subjected to heavy load and of effecting a reciprocal movement of the manuscript carriage or optical system in a smooth manner.

Abstract: A fail-safe time delay circuit is provided to produce an output a predetermined time, and no less than a predetermined time after an input stimulus. The circuit includes a driving circuit for a pair of relays which are operated at slightly greater than 50% duty cycle and out of phase such that, except when the circuit is de-energized, at least one of the relays is always energized. The contacts of the two relays are employed in a balanced voltage amplifier to produce a bi-polar signal, with the magnitude of both polarities increasing, with the time required for the increase to a defined threshold establishing the time delay. A pair of threshold circuits are coupled to the output of the balanced voltage amplifier such that each threshold circuit (one responding to the positive portion, and the other the negative portion of the bi-polar output) is energized when the respective portion of the bi-polar signal is detected to reach the associated threshold.

Abstract: An automatic resetting subcircuit is disclosed in a remotely actuated power distribution switch control circuit characterized by a two-position electromechanical control for an automatic actuation mechanism for operating the switch. The control is provided with two elements, each for moving the control in an opposite direction between the open and closed positions of the switch. The circuit includes a first energy storage capacitor for storing energy received from a source remote from the circuit. A first thyristor, when triggered by a locally generated control signal, applies the energy stored in the first energy storage capacitor to one of the elements to cause the switch to be operated in a predetermined direction. The automatic resetting subcircuit includes a second energy storage capacitor for storing energy received from the remote source with the second energy storage capacitor being electrically isolated from the first thyristor.