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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 5517396 | Power supply apparatus having AC-DC converter A power supply apparatus having an AC-DC converter includes a transformer, an AC-DC converter, a power supply controller, a push switch, and a relay and a relay contact. The relay is connected to an AC power supply voltage input side of the primary coil o... | 05/14/1996 |
| 5513089 | Switching power source control circuit for controlling a variable output to be a target value by thinning-out switching pulses A switching power source control circuit comprising a comparator, a thin-out-processed pulse generator, a thinned-pulse detector, and a reset speed regulator, wherein: the comparator compares an output signal of an error amplifier with a variable referenc... | 04/30/1996 |
| 5513092 | Precision regulated low loss high-power power supply In an AC-powered power supply with a bipolar controller V controlling the instantaneous value of a control quantity measured by a sensor F1 to a predetermined setting within a deviation of less than 0.1% at 1 Hz via the output DC current I... | 04/30/1996 |
| 5473529 | Circuit arrangement for rectifying an AC voltage signal with a plurality of differential amplifier stages In accordance with the present invention, two unsymmetrical differential amplifier stages are fed from a common signal source that supplies an AC voltage signal, but to which the two differential amplifier stages are connected with respect to the unsymmet... | 12/05/1995 |
| 5471376 | Low-loss active voltage-clamp circuit for single-ended forward PWM converter Transformers (T1, T2), switches (M1) and (M2), rectifiers (DR1, DR2, DR3, DR4) and low-pass filter (LF, CF) form a basic power train circuit (12). Auxiliary switches (A1, A2), diodes (DS1, DS2) and capacitors (CS1, CS2) form active clamp circuit (10). The... | 11/28/1995 |
| 5459392 | Unity power factor power supply which includes an electromagnetic interference reduction circuit An electromagnetic interference reduction circuit incorporated into a pulse width modulator in a power factor corrector circuit, and which serves continuously to vary the operating frequency of the width modulated output of the pulse width modulator so th... | 10/17/1995 |
| 5457624 | Efficient switched mode power converter circuit and method A method and apparatus are disclosed for sustaining efficiency of switched mode power converters over wide load ranges. The method and apparatus can be used with any switched mode power converter having at least one synchronous rectifier (Q2) c... | 10/10/1995 |
| 5455757 | Power converter having regeneration circuit for reducing oscillations A power converter including a complementary regeneration circuit for eliminating oscillations and conserving leakage energy to increase the efficiency of a flyback power converter. The complementary regeneration circuit includes a regeneration capacitor, ... | 10/03/1995 |
| 5453679 | Bandgap voltage and current generator circuit for generating constant reference voltage independent of supply voltage, temperature and semiconductor processing A bandgap constant voltage circuit employs a resistor network to pass the currents conducted by a pair of PN junction transistors. These two transistors are operated at differential current densities. A resistor is connected in series with the lower curre... | 09/26/1995 |
| 5453648 | Bridge rectifier having an output terminal stud A bridge rectifier for rectifying the alternating output voltage of an alternating current generator. The bridge rectifier has two heat sinks which are electrically insulated from each other. Each heat sink carries groups of semiconductor diodes that are ... | 09/26/1995 |
| 5453921 | Feedback limited duty cycle switched mode power supply A switched mode power supply includes a modulator s an input for receiving a sense signal and an output for developing a pulse modulated signal. An output switch is coupled to the modulator and is switched in accordance with the pulse modulated signal. A ... | 09/26/1995 |
| 5453922 | Generator for amplitude-coupled voltages A method for generating amplitude-coupled voltages for driving a multiple-winding electric motor using tapped voltages which correspond to the values of at least one predetermined curve configuration and using amplitude-coupled output voltages having a pr... | 09/26/1995 |
| 5453645 | Electric motor An electric motor comprises a substrate, a bearing holder rigidly fitted to the substrate, a shaft held by a bearing in the bearing holder and a rotor rigidly fitted to the shaft and arranged vis-a-vis a side of the substrate to rotate around the shaft. I... | 09/26/1995 |
| 5452196 | Protection system for thyristor valve having first and second reverse voltage detection circuits A protection system for a thyristor valve composed of a plurality of thyristors connected in series. The protection system includes a forward voltage detection circuit for generating a forward voltage signal, a first reverse voltage detection circuit for ... | 09/19/1995 |
| 5451858 | Automatic equal-phase synchronizer for a varying number of synchronized units A spacecraft (10) includes N paralleled power converters (24a, 24b . . . ) for producing current pulses in response to converter synchronizing pulses. The current pulses are integrated (28) to produce an operating direct voltage. The synchronizing pulses ... | 09/19/1995 |
| 5450003 | Power-supply control system for a portable data processor and method for driving the same The present invention discloses a power supply system for a portable data processor and a method for controlling the system. The power supply system includes a main DC/DC converter and an auxiliary DC/DC converter for operating in a low power consumption ... | 09/12/1995 |
| 5449961 | Electric machine cooling system Electric machines are used to produce electrical energy or are driven by electrical energy. Such machines include a stator assembly and a rotor assembly rotationally positioned within the stator assembly. A gap is formed between the rotating element and t... | 09/12/1995 |
| 5450310 | Control system for power converter with prevention of DC magnetization in the transformer A control system for a power converter which is composed of a plurality of self-turn-off devices and is connected to an outer system through a transformer provided with a core. The control system includes an output voltage instruction value generating cir... | 09/12/1995 |
| 5448156 | Low power voltage regulator A circuit is designed for regulating a power supply voltage. A regulator circuit (26) compares a power supply sample voltage VAR1 (34) and a reference voltage VREF (20) and corrects the power supply voltage VAR0 (30). The regulator c... | 09/05/1995 |
| 5446368 | Voltage independent symmetrical current source with cross-coupled transistors A symmetrical current source 10 has a pnp current source 11 including four npn transistors Q1-Q4 and a pnp output transistor Q28 and an npn current sink 12 including pnp transistors Q5-Q8 and an output transistors Q29. In current source 11 cross coupled t... | 08/29/1995 |
| 5444363 | Low noise apparatus for receiving an input current and producing an output current which mirrors the input current A low noise apparatus for receiving an input current and producing an output current which mirrors the input current significantly increases accuracy and signal-to-noise ratio by greatly reducing the effects resulting from threshold voltage mismatches and... | 08/22/1995 |
| 5444360 | Maintenance reduction apparatus A method and an apparatus to reduce the maintenance required for equipment which is not operating for relatively long periods of time such as seasonal equipment. The invention turns the equipment on for a brief interval at fixed periods of time. This cycl... | 08/22/1995 |
| 5444358 | Power supply shunt regulator with current limitation circuit therein A power supply shunt regulator (PSSR) regulates the current flowing to a branch (FET, LD, CSR) coupled in parallel to a power supply (SA) and an electrical load (EL). The regulator limits the discharge current from a parasitic capacitance (PSC)... | 08/22/1995 |
| 5442538 | Apparatus for controlling power converter based on output current A control apparatus for controlling a power converter includes a plurality of switching devices and enabling converted AC output to be obtained to supply arbitrary AC outputs to a load. A voltage command value generating device for generating a voltage co... | 08/15/1995 |
| 5442537 | Method for setting operation constants in an inverter device A method for setting a plurality of operation constants in an inverter device to control variably the speed of an induction motor, the method which changes a value representing the operation constant on a display stepwise in one direction of increase and ... | 08/15/1995 |
| 5442247 | Outer-rotor type spindle motor with a reduced thickness in the axial direction In an outer-rotor type spindle motor: a front-end portion of a spindle (4) forming a stationary member passes through a central portion of a hub plate (7c) (onto which a disk (11) is loaded) of a rotor yoke (6) forming a rotating member; and, the front-en... | 08/15/1995 |
| 5442277 | Internal power supply circuit for generating internal power supply potential by lowering external power supply potential An internal power supply circuit includes a main internal power supply potential generating circuit for generating an internal power supply potential based on a prescribed reference potential, and an auxiliary internal power supply potential generating ci... | 08/15/1995 |
| 5440475 | Electronic Ballast with low harmonic distortion Power factor is increased and harmonic distortion is decreased in a boost circuit by varying the current drawn in phase with the ripple voltage from a rectifying bridge. The boost circuit includes a series connected inductor and switching transistor and t... | 08/08/1995 |
| 5438496 | Connection device with no electrical contact A connection device without electrical contact for connecting a fixed part of a franking machine to a rotary print drum containing electronic circuits includes a transformer separable into two parts respectively fastened to the fixed part and to the rotar... | 08/01/1995 |
| 5438253 | Static var generator using self-commutated inverter A static var generator using self-commutated inverter being able to resume its operation securely and smoothly immediately after a system grounding accident disappears and whose system can be stabilized securely after the accident is provided. The static ... | 08/01/1995 |
| 5438504 | Voltage multiplier circuits or the like A voltage multiplier has first, second, and third capacitors, each having first and second plates. The multiplied output voltage is developed between the first and second plates of the third capacitor. First and second diodes are connected respectively be... | 08/01/1995 |
| 5438498 | Series resonant converter having a resonant snubber A fixed frequency, series resonant converter having a resonant snubber comprising an inductor and capacitor connected across a tank circuit of the converter. An optimum amount of inductance in the resonant snubber minimizes the degree of "shoot-thru," or ... | 08/01/1995 |
| 5436550 | AC-DC converter having saw-tooth wave generating circuit in active filter This invention provides an AC-DC converter in which the shape and the cost do not increase by a measure for a harmonic distortion in the power factor improved AC-DC converter generating little harmonic distortion. In the AC-DC converter, a control input t... | 07/25/1995 |
| 5436825 | Electronic control circuit for the supply of ohmic-inductive loads by means of direct-current pulses An electric control circuit for the supply of ohmic-inductive loads via direct-current pulses with changeable pulse use-ration encompasses a regulator featuring a transformer (T) wherein the transformer is designed as an autotransformer with a single cont... | 07/25/1995 |
| 5436822 | Polarity reversing DC power supply for remotely located equipment A polarity reversing DC power inserter circuit for remotely located equipment such as interdiction apparatus or other signal control apparatus used in a cable or community antenna television (CATV) signal distribution system. A power transformer circuit r... | 07/25/1995 |
| 5436821 | Low-power charge pump circuit and low-power booster method A charge pump circuit has a booster clock driver for outputting a clock signal changing between a power supply voltage and a ground voltage in response to a clock signal; a clock voltage control circuit connected to the booster clock driver for modifying ... | 07/25/1995 |
| 5434499 | Constant current switching circuit provided with a base current compensating circuit A current switching circuit has a setting section, a switching section and a switch changeover section. The switching section has a current mirror circuit, n switching transistors, and a compensating circuit. The current mirror circuit has first through t... | 07/18/1995 |
| 5434772 | Control device for thyristor converter A device for controlling a thyristor converter including series connected thyristors. The device includes a plurality of forward voltage detection circuits, each of which detects forward voltage of one of the thyristors and generates a forward voltage sig... | 07/18/1995 |
| 5432430 | Phase shifting circuit and method for generating several output signals of different phases The present invention discloses a phase shifting circuit for generating several output signals wherein each of the output signals maintaining a constant phase difference. The phase shifting circuit includes a first input port for receiving an input signal... | 07/11/1995 |
| 5432433 | Current source having current mirror arrangement with plurality of output portions A current source including a first transistor and a second transistor with their bases connected together, a resistor connected to the emitter of the first transistor, a third transistor with its base connected to the collector of the second transistor, a... | 07/11/1995 |
