Celebrity Inventors
Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 5435641 | Cabinet for electrical equipment A cabinet formed from a unitary open-faced cubicle structure having two lateral walls, an upper wall, a bottom wall, and a rear wall. A door closes the open face of the structure. The cabinet has at least one chimney along one lateral wall, the chimney ex... | 07/25/1995 |
| 5221862 | A.C. electrical power supply system including a backup power supply equipped with an inverter operating in reversible mode A first control loop enables the inverter to be made to operate as a current generator when it recharges the batteries of a back-up power supply. Two other control loops enable the inverter to compensate on the one hand the harmonics, and on for other han... | 06/22/1993 |
| 5220479 | Electronic trip device whose front panel is formed by a flat screen display The front panel of the trip device is formed by a flat screen display, for example liquid crystal, controlled by the trip device microprocessor. The display provides a permanent display of the information relating to the type of trip device, the tripping ... | 06/15/1993 |
| 5208720 | Electronic trip device with short delay function The short time delay circuit comprises a counter which is zero reset when the signal representative of the current is greater than or equal to a threshold, and controls count-down of an up-down counter, when the content of the counter reaches a preset val... | 05/04/1993 |
| 5207601 | Device for mechanical and electrical assembly of miniature molded cases A runner (20) for mechanical assembly between two miniature molded cases (10,11) performs at the same time the electrical connection of the control circuits of the two cases (10,11). For this purpose, contact pads (27) are arranged in the bottom of the sl... | 05/04/1993 |
| 5202818 | Sealed switchgear cabinet The framework of a switchgear cabinet is formed by identical frame sections in the shape of corner-pieces whose edges are folded at right angles to form folded ends. The edges of the corner-pieces are moreover joined together by a diagonal sealing partiti... | 04/13/1993 |
| 5195012 | Electronic trip device comprising an improved long delay function To perform the long delay function of an electronic trip device, a quantity (TLR1) representative of the thermal current state varies proportionally to the difference (I2 -Is2) between the square of a value (I) representative of the ... | 03/16/1993 |
| 5164876 | Static trip device comprising an earth protection desensitization system The differential tripping threshold of the trip device is a polynomial function of an order greater than or equal to two of the highest phase current flowing in the power system protected by the circuit breaker comprising the trip device.... | 11/17/1992 |
| 5153802 | Static switch For a preset period following application of a closing order, the semi-conductor of the static power switch, supplied with DC voltage, is controlled by a regulating circuit so as to operate as a current generator limiting the current to a value much lower... | 10/06/1992 |
| 5150057 | Continuous monitoring system of the electrical conduction of a mains system The monitoring system of the conduction of a low voltage A.C. mains system comprises at least one measuring module creating a D.C. current component between two mains system conductors. The measuring module computes a value representative of the line resi... | 09/22/1992 |
| 5148064 | Medium voltage static switch The medium voltage static switch is formed by serial connection of power semi-conductors, preferably of MOS type, controlled by a capacitive line. A diode is connected in parallel with the capacitor of the capacitive line between the gates of two adjacent... | 09/15/1992 |
| 5147981 | Low voltage electrical switchgear cabinet An electrical switchgear cabinet comprises a frame, formed by uprights and switchgear support rails, which is fixed to props securedly united to a back plate. The sides of the back plate are folded forwards over a limited height smaller than the distance ... | 09/15/1992 |
| 5132865 | Ultra high-speed circuit breaker with galvanic isolation A circuit breaker comprises a static switch electrically connected in series with a disconnecting switch having an operating mechanism with a handle to close and open a system of main contacts. A voltage sensor ocmprises an electromagnet with a moving cor... | 07/21/1992 |
| 5101160 | Digital isolation monitor for an electrical power system A digital isolation monitor comprises a digital processing signal processor P1 designed to synthesize a sine wave in real time by a table, and to send the digital values of this sine wave to a digital-to-analog converter of an input channel to generate a ... | 03/31/1992 |
| 5095183 | Gas-blast electrical circuit breaker A pole-unit of a gas-blast electrical circuit breaker comprises a tranverse partition made of injected insulating plastic material which at the same time performs guiding of the movable contact which passes through it. The injected material part bears an ... | 03/10/1992 |
| 5083081 | Current sensor for an electronic trip device A measuring sensor of an electronic trip device of a circuit breaker comprises a shunt in the form of a hollow cylinder inside which there is located an electronic processing unit, comprising an amplifier circuit and an input resistance in good thermal co... | 01/21/1992 |
| 5077627 | Solid-state trip device for a protective circuit breaker of a three-phase mains system, enabling the type of fault to be detected The solid-state trip device of a protective circuit breaker of a three-phase mains system comprises a fault type detection circuit comparing the currents flowing in the mains system conductors with a first threshold and a second threshold, higher than the... | 12/31/1991 |
| 5075628 | Insulation monitoring system of a direct current power supply system Insulation monitoring of a direct current power supply system is achieved by application of an alternating current and the detector is constituted by a current transformer and a Hall-effect current sensor. This Hall-effect sensor controls a direct current... | 12/24/1991 |
| 5062525 | Production machine incorporationg a high-speed lift and carry device with double walking beam, and the production system implementing this type of machine A production machine equipped with two walking beam lift and carry devices forming two parallel tracks, a main track and a branch track. Transfer of a part from the branch track to the main track is achieved by a handling unit synchronized with the walkin... | 11/05/1991 |
| 5057655 | Electrical circuit breaker with self-extinguishing expansion and insulating gas An inside of tubular contacts of a self-extinguishing expansion SF6 -gas circuit breaker including guiding ribs arranged to oppose any vortex-effect swirling gas flow between a first extinguishing chamber and a second expansion chamber. The pre... | 10/15/1991 |
| 5003138 | Rotating arc electrical switch A medium-voltage electrical switch comprises contacts actuated by a connecting rod and crank system. Parallel to the main contacts there is arranged an arcing circuit comprising a cylindrical electrode disposed inside a coil and whose internal surface coo... | 03/26/1991 |
| 5001313 | Rotating arc circuit breaker with centrifugal extinguishing gas effect A rotating arc circuit breaker comprising a pair of separable arcing contacts, a coil to set the arc in rotation, and an annular migration electrode. Guiding fins are arranged in the extinguishing chamber to slow down the rotation of the gas in a first pe... | 03/19/1991 |
