George L Bees, 72260 Washington Ave, Needham, MA 02492

6763049, Jul 13, 2004

Jun 15, 2000

09/595360

George L. Bees - Framingham MA

Lambda EMI - Neptune NJ

H01S 3223

372 58, 372 57

A system and method for a power supply system that charges a capacitor, wherein the capacitor charge drives a pulse discharge driven system. The power supply system utilizes a main power supply and a resonant inductor and capacitor configuration to charge the capacitor to a specified, large percentage of a driving voltage that is required by the pulse system. A control module monitors the capacitor charge and disconnects the main power supply when the capacitor charge is within the specified percentage. The main power supply disconnect causes the inductor to discharge and similarly charge the capacitor in a more controlled manner. Once the control module measures the capacitor voltage at the full driving voltage, the control module commands a switch to separate the inductor from the capacitor. The control module similarly activates a small high voltage power supply that monitors the capacitor and replenishes any natural capacitor discharge that may occur in the time between the full capacitor charge and the capacitor discharge by the pulse discharge driven system. Once the pulse discharge driven system discharges the capacitor, the control module returns the power supply system to its initial state, wherein the main power supply and residual energy in the capacitor cooperate to efficiently charge the inductor and capacitor.

4506196, Mar 19, 1985

Jan 3, 1984

6/567618

George L. Bees - Natick MA

Candela Corporation - Natick MA

H02M 7515

315241R

A series inverter, high voltage capacitor charging circuit includes current sensors for sensing the current through each SCR in the circuit. The sensed current is used to vary the gating frequency of the SCRs and to preclude firing of an SCR until the other is in a stable off condition. The gating of each SCR is delayed by an amount of time determined by a control capacitor charging circuit. That charging circuit is inhibited as long as one of the SCRs is conducting and once the load voltage has reached a predetermined level. The time constant of that charging circuit can be changed as the desired level is approached.

4647830, Mar 3, 1987

Nov 24, 1982

6/444213

George L. Bees - Natick MA

Candela Corporation - Natick MA

H02H 7122

320 1

A series inverter, high voltage capacitor charging circuit includes current sensors for sensing the current through each SCR in the circuit. The sensed current is used to vary the gating frequency of the SCRs and to preclude firing of an SCR until the other is in a stable off condition. The gating of each SCR is delayed by an amount of time determined by a control capacitor charging circuit. That charging circuit is inhibited as long as one of the SCRs is conducting and once the load voltage has reached a predetermined level. The time constant of that charging circuit can be changed as the desired level is approached of if insufficient reverse bias is applied to an SCR for quick turn-off of the SCR. Resolution of the system can be increased by a shunt regulator which shorts the output transformer. The circuit can be disabled if the high voltage capacitor does not reach its set level within a given time.

4811188, Mar 7, 1989

Dec 16, 1986

6/942220

George L. Bees - Natick MA

Candela Laser Corporation - Wayland MA

H02M 3315

363 28

A series inverter, high voltage capacitor charging circuit includes current sensors for sensing the current through each SCR in the circuit. The sensed current is used to vary the gating frequency of the SCRs and to preclude firing of an SCR until the other is in a stable off condition. The gating of each SCR is delayed by an amuont of time determined by a control capacitor charging circuit. That charging circuit is inhibited as long as one of the SCRs is conducting and once the load voltage has reached a predetermined level. The time constant of that charging circuit can be changed as the desired level is approached of if insufficient reverse bias is applied to an SCR for quick turn-off of the SCR. Resolution of the system can be increased by a shunt regulator which shorts the output transformer. The circuit can be disabled if the high voltage capacitor does not reach its set level within a given time.

5638260, Jun 10, 1997

May 19, 1995

8/444995

George L. Bees - Framingham MA

Electronic Measurements, Inc. - Neptune NJ

H02M 3335

363 17

A power supply for supplying a load capacitor and comprising a parallel resonant circuit having an inductor and a capacitor, a switching network operating at a frequency at or above the resonant frequency and applying alternating current to the resonant circuit and the primary side of a power transformer, a rectifier for rectifying the induced currents on the secondary winding of the transformer, and applying the rectified output to the load capacitor, and a controller for controlling the output of the power supply based on a comparison of the output voltage V. sub. out with a desired (setpoint) voltage V. sub. prog. The resonant capacitance may consist of the power transformer winding self-capacitance. The resonant inductance may consist of the primary winding of the power transformer. The controller provides switching signals to operate the power supply at the resonant frequency of the resonant tank circuit during a "rapid rate charging mode" at which a maximum output current I. sub.

4716569, Dec 29, 1987

Apr 9, 1986

6/849843

George L. Bees - Ashland MA

A.L.E. Systems, Inc. - Ashland MA

H01S 304

372 38

An adjustable, constant current power supply for use in electrically pumping negative impedance gas discharge lasers is disclosed. The power supply includes a voltage regulator and a constant current power source the output of the voltage regulator which is variable and controlled being connected to the input of the constant current power source. The output from the power supply is passed through a gaseous lasing medium located within a laser tube of the gas discharge laser in order to pump to the lasing medium. Be controlling the voltage fed into the constant current power source the current output therefrom can be altered in order to effectively vary the power output of the gas discharge laser.

4366570, Dec 28, 1982

Nov 13, 1980

6/206389

George L. Bees - Natick MA

Candela Corporation - Natick MA

H02M 7515

372 70

A series inverter, high voltage capacitor charging circuit includes current sensors for sensing the current through each SCR in the circuit. The sensed current is used to vary the gating frequency of the SCRs and to preclude firing of an SCR until the other is in a stable off condition. The gating of each SCR is delayed by an amount of time determined by a control capacitor charging circuit. That charging circuit is inhibited as long as one of the SCRs is conducting and once the load voltage has reached a predetermined level. The time constant of that charging circuit can be changed as the desired level is approached.