Celebrity Inventors
Comic actor Danny Kaye received patent D166,807 for the co-design of "Blowout Toy or the Like". It's similar to one of those toys that unravels when you blow into at a birthday party except Kaye's has three blowouts going in different directions, not just one.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6947297 | Active resonant snubber for DC-DC converter The present invention proposes an improved circuit design and configuration of a DC-DC converter with resonant reset. In this present invention, the active resonant snubber in parallel to a primary winding of a transformer of a DC-DC converter for resetting the tran... | 09/20/2005 |
| 6903944 | Active clamp DC/DC converter with resonant transition system A DC—DC converter is disclosed comprising an active clamp topology, including an active clamp resonant transition system to provide substantially zero or reduced voltage for turn-on of the primary switch. The resonant transition system includes an inductor in seri... | 06/07/2005 |
| 6518711 | Halogen lamp electronic transformer A halogen lamp electronic transformer a power supply circuit, a voltage divider circuit, a control circuit, inductive coils, a push pull oscillator circuit, and a triggering and overload protection circuit. The push pull oscillator circuit consists of a p... | 02/11/2003 |
| 5260863 | Control of a discontinuous current by a thyristor rectifier with inductive load For controlling the current in an inductive load, the gate current used to fire thyristors in a rectifier is controlled to reach zero at exactly the same time, within a given half-wave, as the current in the inductive load which receives the voltage from ... | 11/09/1993 |
| 5255179 | Switched mode power supply for single-phase boost commercial AC users in the range of 1 kw to 10 kw A DC to AC power converter is disclosed which is connectable to a DC source, and including a first and second pair of switches which converts the DC source directly to AC by alternately switching between each of the first pair of switches at high frequenc... | 10/19/1993 |
| 4780804 | Method and an arrangement for enabling the magnetizing current passing through a transformer to be minimized when an asymmetric load is applied to the secondary side of the transformer The invention relates to a method and to an arrangement for controlling the respective conduction times of two directionally opposed electrical devices (9,10) which are mutually connected in parallel and permit current to pass therethrough solely in one d... | 10/25/1988 |
| 4748311 | Inverter with power supply to chopper through parallel resonant circuit tuned to twice the chopper frequency The invention relates to an inverter with a direct-voltage source and a chopper section, the chopper section having push-pull switching at a frequency f0. A parallel tuned circuit, the resonant frequency of which is 2f0 is provided b... | 05/31/1988 |
| 4723188 | Permanent magnet surge arrestor for DC power converter An improved surge current limiting method and apparatus is provided for an inverter circuit. The inverter includes electronic switching devices serially connected between relatively positive and negative voltage buses and alternately conductive for provid... | 02/02/1988 |
| 4706182 | RF high-voltage power supply There is disclosed a small-sized RF high-voltage power supply capable of stably supplying an RF high voltage to a load at the maximum power efficiency, even if the load has a nonlinear electrostatic capacity that varies with the applied voltage. The power... | 11/10/1987 |
| 4698743 | Resonance inverter with control means for detecting peak voltage and having a starting circuit A resonance inverter includes a DC power source, a resonance capacitor, an inductor, and a plurality of semiconductor switches. The resonance capacitor and inductor form a parallel resonant circuit. The inverter further includes control means for detectin... | 10/06/1987 |
| 4608627 | Non-dissipative current distribution circuit for magnetohydrodynamic generator electrodes A nondissipative current distribution circuit for a power source, such as magnetohydrodynamic generator, that delivers its output current through a first plurality of positive electrodes and a second plurality of negative electrodes (including plural posi... | 08/26/1986 |
| 4514795 | High-voltage generator, notably for an X-ray tube The invention relates to a high-voltage generator for supplying two different output voltages or output currents, particularly for X-ray tubes whose anode current deviates from the cathode current. Symmetrical output voltages can be obtained during operat... | 04/30/1985 |
| 4471420 | Protection circuit for thyristors in an inverter in rail-bound vehicles In a protective circuit for the thyristors of an inverter circuit in a rail-bound vehicle, RC-R members are connected in parallel with the individual thyristors in order to prevent undue reverse voltages and a fuse is provided to cut off excess currents. ... | 09/11/1984 |
| 4460949 | High frequency parallel resonant dc-dc converter A dc-dc converter employs a parallel resonant circuit which is driven by square waves of current. By adjusting the frequency below the resonant point, the voltage on the resonant components can be stepped up. Switching losses in the inverter devices are l... | 07/17/1984 |
| 4455600 | Single phase, double-ended thyristor inverter with choke-coupled impulse commutation A parallel inverter circuit for converting DC voltage to a variable AC voltage. One terminal of the DC source is connected to an inductor and, in turn, through a pair of gate-controlled, main rectifiers (SCR's), to the opposite ends of a transformer prima... | 06/19/1984 |
| 4453207 | DC To AC power inverter The DC to AC power inverter is of the class B, C, D or E type and includes a battery, at least one power SCR and associated capacitor circuitry, at least one input winding on a main transformer core and at least one output secondary winding on the transfo... | 06/05/1984 |
| 4445049 | Inverter for interfacing advanced energy sources to a utility grid A transistor is operated in the PWM mode such that a hlaf sine wave of current is delivered first to one-half of a distribution transformer and then the other as determined by steering thyristors operated at the fundamental sinusoidal frequency. Power to ... | 04/24/1984 |
| 4274137 | Inverter circuits An inverter circuit, having a DC input and an AC output, has an input circuit portion which includes an isolating diode and an input filter including a choke and a polarized capacitor across the DC input. The DC chopper portion of the inverter circuitry m... | 06/16/1981 |
| 4250541 | Push-push resonant power inverter A DC-to-AC inverter includes first and second resonant circuit loops each including a capacitor, a primary coil of an output circuit, a silicon control rectifier providing a current path in one direction around the loop, and a conventional diode providing... | 02/10/1981 |
| 4204268 | Auxiliary commutation circuit for an inverter An auxiliary commutation circuit to compensate for transient type overload conditions of an inverter comprises a pair of oppositely charged capacitors controlled by separate switches, each operable at a particular time during the conduction cycle of the m... | 05/20/1980 |
| 4172278 | DC to AC inverter A full wave DC to AC inverter having two SCR inverter switches which alternately conduct to connect a DC source across one section or the other of a center tapped power transformer primary to establish an alternating current in the secondary. A commutatin... | 10/23/1979 |
| 4161773 | Push-pull inverter including starter circuit In a push-pull inverter (including a transformer) for changing direct current into alternating current, a circuit is disclosed for starting the inverter in which the first pulse of a rectangular pulse train applied to the transformer has a duration of one... | 07/17/1979 |
| 3967183 | Self-commutating inverter with controlled main valves in a center-tap circuit The invention concerns a self-commutating inverter with controlled main valves in a center-tap circuit, with which a commutation capacitor, a series choke and a recovery valve each are associated, and with a transformer for connecting a variable load. In ... | 06/29/1976 |
| 3931565 | Inverters An inverter circuit, having a dc input and an ac output, has an input circuit portion which includes an isolating diode and an input filter including a choke and a polarized capacitor across the dc input. The dc-chopper portion of the inverter circuitry m... | 01/06/1976 |
