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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 4477746 | Microwave-triggered laser switch A high-repetition rate switch for delivering short duration, high-power electrical pulses from a pulsed-charged dc power supply. The present invention utilizes a microwave-generating device such as a magnetron that is capable of producing high-power pulse... | 10/16/1984 |
| 4456835 | Method of operating a load from alternating current mains and circuit arrangement therefor In the disclosed circuit arrangement for operating the load from alternating current lines, an inductance connected to the load serves as a first energy store. A first control switch switches the energy storage on and off in response to a regulator circui... | 06/26/1984 |
| 4441033 | Process for the generation of high capacity pulses from an inductive energy storage device An inductive storage circuit for generating high voltage pulses includes a quenching circuit and a discharge circuit each connected in parallel with a storage inductor. One branch of the quenching circuit includes a quenching capacitor and one branch of t... | 04/03/1984 |
| 4344123 | Multilevel PWM inverter The multilevel inverter includes a voltage divider which when connected across a dc source ED, provides voltage at terminals having values between +ED to -ED. A first and a second set of thyristors pairs are connected betw... | 08/10/1982 |
| 4329595 | AC Resonant charger with charge rate unrelated to primary power frequency An AC resonant charger for a capacitive load, such as a PFN, is provided with a variable repetition rate unrelated to the frequency of a multi-phase AC power source by using a control unit to select and couple the phase of the power source to the resonant... | 05/11/1982 |
| 4329678 | Method and apparatus for remotely controlling an electrical appliance A transmitter (12) has an output (13) adapted to be connected across an alternating current power line (AC1, AC2) at a point remote from an appliance (24) to be controlled. The transmitter generates one pulse per cycle of the alternating current. The puls... | 05/11/1982 |
| 4255668 | Pulsed power supplies A pulsed power supply for driving an X-ray tube is described. Four p.f.n. devices are coupled in pairs to respective transformers and the individual devices supply pulses of relatively short duration to their respective transformers. Each pulse supplied b... | 03/10/1981 |
| 4031528 | Transmitting over power lines A transponder transmitter for transmitting over power lines includes a rectifier circuit that rectifies the power at power line frequency to provide a unipolar potential having ripple at twice the power line frequency. A circuit receives a drive signal fr... | 06/21/1977 |
| 4012702 | Chime generating circuit A circuit for electronically generating chime-like tones wherein an oscillator circuit output is passed through a diode bridge having another diode across the D.C. terminals thereof and poled to be conductive. The resultant tone is distorted to considerab... | 03/15/1977 |
