Portable pulsed signal generator

A portable pulsed signal generator, comprising in combination:

• a plurality of series connected batteries;
• an inverter, having a pair of inputs and a pair of outputs, with one of the inputs thereof connected to the negative terminal of one of the batteries of the aforesaid plurality of series connected batteries, and with other input thereof connected to the positive terminal of said one battery of the aforesaid plurality of series connected batteries;
• a first motor, having an input, an output, and a rotatable shaft, with the input thereof connected to one of the outputs of said inverter;
• an on-off switch, having a pair of terminals and means for effecting the timely electrical closure thereof, with one of the terminals thereof connected to the electrical output of said first motor, and with the other terminal thereof connected to the other output of said inverter;
• a first cam mounted on the shaft of said first motor for rotation therewith
• a first cam follower disposed in slidable engagement with said first cam for timely movement thereby;
• a first switch having a fixed contact and a movable arm, with the fixed contact thereof electrically connected to said one terminal of the aforesaid on-off switch, and with the movable arm thereof mechanically connected to said first cam follower;
• a second cam mounted on the shaft of said first motor for rotation therewith;
• a second cam follower disposed in slidable engagement with said second cam for timely movement thereby;
• a second switch having a fixed contact and a movable arm, with the fixed contact thereof electrically connected to the movable arm of said first switch and to the other terminal of the aforesaid on-off switch;
• a second motor having an input, an output, and a rotatable shaft, with the input thereof connected to said one output of said inverter, and with the output thereof electrically connected to the movable arm of said second switch;
• a third cam mounted on the shaft of said second motor for rotation therewith;
• a third cam follower disposed in slidable engagement with said third cam for timely movement thereby.
• a third switch having a movable arm and two fixed contacts, with the movable arm thereof mechanically connected to said third cam follower in such manner as to be alternately closed with the fixed contacts thereof in response thereto, and with the movable arm thereof electrically connected to the negative terminal of the aforesaid one of said plurality of series connected batteries;
• a fourth cam mounted on the shaft of said second motor for rotation therewith;
• a fourth cam follower disposed in slidable engagement with said fourth cam for timely movement thereby;
• a fourth switch having a fixed contact and a movable arm, with the fixed contact thereof electrically connected to the output of said second motor, with the movable arm thereof electrically connected to said other output of the aforesaid inverter, and with the movable arm thereof mechanically connected to said fourth cam follower in such manner as to be opened and closed with the fixed contact thereof in response to timely movement of said fourth cam follower;
• a direct current power amplifier having a predetermined direct current voltage supply, a positive potential input, a negative potential input with respect to said positive potential input, a control input, and a positive potential output, the potential of which is more positive than that of said negative potential input and less positive than that of said positive potential input, with the positive potential input thereof connected to the positive terminal of said one battery of the aforesaid plurality of series connected batteries, and with the negative potential input connected to the negative of another of the batteries of said plurality of series connected batteries;
• a potentiometer having a fixed resistance and a movable arm in slidable engagement therewith, with the fixed resistance thereof connected across the aforesaid predetermined direct current voltage supply of said direct current power amplifier, with the movable arm thereof mechanically connected to the shaft of said second motor for rotation therewith, and with the movable arm thereof electrically connected to the aforesaid control input of said direct current power amplifier;
• a pair of output terminals;
• a first solenoid relay having first and second switches and a solenoid connected thereto for the simultaneous opening and closing thereof, with the first switch thereof connected between the positive potential output of said direct current power amplifier and one of said pair of output terminals, and with the second switch thereof connected between the positive terminal of said one battery of the aforesaid plurality of series connected batteries and the other of said pair of output terminals, and with the solenoid thereof connected between one of the fixed contacts of the aforesaid third switch and the negative input of said direct current power amplifier;
• a second solenoid relay having third and fourth switches and a solenoid connected thereto for the simultaneously opening and closing thereof, with the third switch thereof connected between the positive potential output of said direct current power amplifier and said other of said pair of output terminals, and with the fourth switch connected between the positive terminal of said one of the aforesaid plurality of series connected batteries and said one of said pair of output terminals, and with the solenoid thereof connected between the other of the fixed contacts of said third switch and the negative input of said direct current power amplifier.