Inverter - oscillator

Claim 2

A push-pull inverter circuit including a pair of transistors connected to the primary of a saturable core transformer; means to connect a load to the secondary of said transformer; means enabling said circuit to function as an oscillator with a tuned tank, including the load, upon activation of load; and means connected to the base of each of said transistors providing current conduction in one direction and current blocking in the opposite direction for preventing inadvertent turn-on of either one of said pair of transistors while the other of said pair of transistors is conducting.

Claim 3

A circuit arrangement for providing AC electric energy to a load from a source of DC electric energy, including: a. a saturable core transformer having a primary winding, a secondary winding, and first and second additional windings magnetically closely coupled to said primary winding, b. said primary winding having a center tap for connection to one side of the source of DC electric energy; c. a pair of power transistors, each of said transistors having an emitter, a collector and a base; d. said collector and emitter of each of said transistors being connected between the other side of the source of DC electric energy and said primary winding, the connection of each of said transistors to said primary winding being on the opposite side of the center tap than the corresponding connection of the other of said transistors; e. first means connecting said base of one of said transistors to its emitter through said first additional winding, second means connecting said base of the other of said transistors to its emitter through said second additional winding, each of said first and second means providing current conduction in one direction and current blocking in the opposite direction for preventing in-adverent turn-on of either one of said pair of transistors inadvertant the other one of said pair of transistors is conducting; f. output means for connecting said secondary winding to a load; g. capacitance means connected across said primary winding for forming, with said output means and the load, a tuned tank circuit when the load is activated; h. whereby said circuit arrangement will act as a push-pull inverter until the load is activated and thereafter will act as an oscillator with a tuned tank circuit.

Claim 4

A circuit arrangement for providing AC electric energy to a load from a source of DC electric energy, including: a. a saturable core transformer having a primary winding, a secondary winding, and first and second additional windings magnetically closely coupled to said primary winding, b. said primary winding having a center tap for connection to one side of the source of DC electric energy; c. a pair of power transistors, each of said transistors having an emitter, a collector and a base; d. said collector and emitter of each of said transistors being connected between the other side of the source of DC electric energy and said primary winding, the connection of each of said transistors to said primary winding being on the opposite side of the center tap than the corresponding connection of the other of said transistors; e. first means connecting said base of one of said transistors to its emitter through said first additional winding, second means connecting said base of the other of said transistors to its emitter through said second additional winding, each of said first and second means providing current conduction in one direction and current blocking in the opposite direction for preventing in-adverent turn-on of either one of said pair of transistors inadvertant the other one of said pair of transistors is conducting; f. output means for connecting said secondary winding to a load; g. capacitance means connected across said primary winding for forming, with said output means and the load, a tuned tank circuit when the load is activated; h. whereby said circuit arrangement will act as a push-pull inverter until the load is activated and thereafter will act as an oscillator with a tuned tank circuit.

Claim 5

A circuit arrangement as set forth in claim 2 wherein each of said emitters is connected to said primary winding.

Claim 6

A circuit arrangement as set forth in claim 2 wherein each of said first and second means includes a conduction control capacitance and a rectifier connected in parallel therewith and poled to limit the level of charge on said conduction control capacitance of a polarity tending to turn on the associated transistor.

Claim 7

A circuit arrangement as set forth in claim 2 wherein said output means includes a linear inductance.

Claim 8

A circuit arrangement for providing AC electric energy to a gas tube discharge device having a substantial change in operating characteristic as it is activated, from a source of DC electric energy, said circuit arrangement including: a. a saturable core autotransformer having a primary winding, a secondary winding, and first and second additional windings magnetically closely coupled to said primary winding; b. said primary winding having a center tap for connection to one side of the source of DC electric energy; c. a pair of power transistors, each of said transistors having an emitter, a collector and a base; d. each of said emitters being connected to said primary winding on the opposite side of said center tap from the other of said emitters; e. each of said collectors being connected to the other side of source of DC electric energy from said center tap; f. each of said bases being connected through a resistance to the other side the source of DC electric energy from said center tap; g. said base of one of said transistors being connected to the corresponding emitter through said first additional winding and a first conduction control capacitance and poled to limit the level of charge on said first conduction control capacitance of a polarity tending to turn-on the associated transistor while the other of said pair of transistors is conducting; h. said base of the other of said transistors being connected to the corresponding emitter through said second additional winding and a second conduction control capacitance; a second rectifier connected in parallel with said second conduction control capacitance and poled to limit the level of charge on said second control conduction capacitance of a polarity tending to turn on the associated transistor while the other of said pair of transistors is conducting; a tuning capacitance connected across said primary winding; output circuit means for connecting a gas tube discharge device to said secondary winding in series with a linear inductance, said tuning capacitance being reflected into said output circuit means for providing a tuned series resistance -inductance - capacitance circuit upon activation of the gas tube discharge device.

Claim 9

A circuit arrangement for providing AC electric energy to a gas tube discharge device having a substantial change in operating characteristic as it is activated, from a source of DC electric energy, said circuit arrangement including: a. a saturable core autotransformer having a primary winding, a secondary winding, and first and second additional windings magnetically closely coupled to said primary winding; b. said primary winding having a center tap for connection to one side of the source of DC electric energy; c. a pair of power transistors, each of said transistors having an emitter, a collector and a base; d. each of said emitters being connected to said primary winding on the opposite side of said center tap from the other of said emitters; e. each of said collectors being connected to the other side of source of DC electric energy from said center tap; f. each of said bases being connected through a resistance to the other side the source of DC electric energy from said center tap; g. said base of one of said transistors being connected to the corresponding emitter through said first additional winding and a first conduction control capacitance and poled to limit the level of charge on said first conduction control capacitance of a polarity tending to turn-on the associated transistor while the other of said pair of transistors is conducting; h. said base of the other of said transistors being connected to the corresponding emitter through said second additional winding and a second conduction control capacitance; a second rectifier connected in parallel with said second conduction control capacitance and poled to limit the level of charge on said second control conduction capacitance of a polarity tending to turn on the associated transistor while the other of said pair of transistors is conducting; a tuning capacitance connected across said primary winding; output circuit means for connecting a gas tube discharge device to said secondary winding in series with a linear inductance, said tuning capacitance being reflected into said output circuit means for providing a tuned series resistance -inductance - capacitance circuit upon activation of the gas tube discharge device.