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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 4743903 | Peripheral vision artificial horizon device and associated methods An artificial horizon device producing a projected light bar perceivable with peripheral vision. The device includes a scanner assembly with a pair of rapidly movable scanning mirrors each selectively pivotal about respective mutually perpendicular axes. ... | 05/10/1988 |
| 4741094 | Two pole permanent magnet rotor construction method A two pole permanent magnet rotor which utilizes a single cylindrical two pole permanent magnet mounted between two end pieces and surrounded by a retaining hoop. The cylindrical two pole permanent magnet, which is made of high energy product material, is... | 05/03/1988 |
| 4730601 | Steam engine reaction chamber, fuel composition therefore, and method of making and operating same A fuel composition for a reaction chamber which when combined with a selected reactant produces heat energy and hydrogen gas. A reaction chamber structure, method of making and method of operating the reaction chamber are also disclosed.... | 03/15/1988 |
| 4729154 | Method of making and operating a very high speed marginally lubricated ball thrust bearing A ball thrust antifriction bearing for operation at very high speed in the DN number range from 5×105 to 2×106 and higher while only marginally lubricated by a mist of liquid having comparatively poor lubricating qualities which is... | 03/08/1988 |
| 4725206 | Thermal isolation system for turbochargers and like machines Apparatus for cooling and thermally isolating turbocompressor foil bearings. The bearing journal includes a hollow shaft through which gas is positively circulated to cool the shaft. A slinger at one end of the shaft develops a centrifugal pumping action ... | 02/16/1988 |
| 4723202 | Converter-fed AC machine without damper winding A method and apparatus for converting the output of a polyphase AC machine into a DC current by capacitor assisted line commutation within the rectifying circuitry.... | 02/02/1988 |
| 4722630 | Ceramic-metal braze joint A rotor-shaft assembly which includes a ceramic, solid hubbed turbine rotor having an integral stub shaft brazed within one end of a generally cylindrically shaped sleeve member. A metal shaft is either brazed or cold press fitted within the other end of ... | 02/02/1988 |
| 4722387 | Heat exchanger and method of assembly A heat exchanger of the type characterized by a plurality of heat exchanger tubes separated by cooling fins. The ends of the tubes being inserted into a leadless header plate and thereafter brazed thereto. The overall depth of the heat exchanger being app... | 02/02/1988 |
| 4718273 | Combination alpha, static and total pressure probe An air data sensor probe for providing measurements of total pressure, static pressure and angle-of-attack for an aircraft in flight. The probe is essentially cylindrical with a hemispherical nose. It has a vertically elongated central opening for measure... | 01/12/1988 |
| 4717318 | Turbocharger heat transfer control method and apparatus A turbocharger includes spaced apart turbine housing and compressor housing sections which are connected by a center housing section. The center housing section journals an elongate shaft carrying at opposite ends thereof a compressor wheel and a turbine ... | 01/05/1988 |
| 4711677 | High temperature bushing alloy A cast austenitic stainless steel bushing for relatively high temperature turbocharger and automotive applications is provided having good hot hardness and hot strength properties and a co-effficient of thermal expansion approximating that of the parent h... | 12/08/1987 |
| 4709180 | Toothless stator construction for electrical machines A stator for use with a permanent magnet rotor electrical machine is disclosed which stator eliminates ferromagnetic teeth previously used in stator cores. The stator of the present invention uses a winding support structure made of non-magnetizable, non-... | 11/24/1987 |
| 4705463 | Compressor wheel assembly for turbochargers A compressor wheel assembly for turbochargers and the like comprises a compressor wheel including a boreless hub formed integrally as by casting with a circumferential array of aerodynamically contoured centrifugal impeller blades. The wheel hub is secure... | 11/10/1987 |
| 4702969 | Laminate bonding methods for nonferrous metallic fluidic devices A laminated aluminum fluidic device is constructed by sequentially coating the facing side surfaces of the aluminum laminae with layers of zinc, nickel and solder, positioning the facing pairs of solder layers in intimate contact, and heating the coated l... | 10/27/1987 |
| 4701060 | Foil journal bearing cooling Cooling is provided for a foil journal bearing by means of flow openings in the individual overlapping foils without adversely affecting the compliance of the foils.... | 10/20/1987 |
| 4698974 | Internal combustion closed rankine cycle steam engine Disclosed is a steam engine which is used to propel underwater vehicles without exhausting combustion products to the surrounding water. A solid metallic fuel reacts in a first chamber with water to produce hydrogen which is subsequently reacted in a seco... | 10/13/1987 |
| 4697414 | Lubrication apparatus A lubrication system for expendable turbine engines, or for emergency use with durable engines, comprises a housing receiving a collapsible bladder filled with lubricant, and means for penetrating the bladder and communicating the lubricant to a receiver ... | 10/06/1987 |
| 4692093 | Ram air turbine Apparatus and methods for adjusting the pitch of a fluid reactive blade member carried upon a rotor in response to a speed difference between the rotor and a reference speed shaft.... | 09/08/1987 |
| 4689999 | Temperature compensated pressure transducer A quartz pressure transducer is disclosed which includes four or five elements, three of which are diaphragms containing deposited metal electrodes on both sides thereof. Since the electrodes are all on the diaphragms, the transducer disclosed herein is h... | 09/01/1987 |
| 4684079 | Inflatable evacuation device An inflatable evacuation device to simultaneously evacuate from both an overwing aircraft exit and an aircraft exit aft of the trailing edge of the aircraft wing.... | 08/04/1987 |
| 4682469 | Compressor power unit fuel flow control In a gas turbine engine compressor power unit fuel is supplied at an essentially constant pressure to a fuel nozzle for injection into the combustion liner of the power unit's combustor. Nozzle fuel flow is modulated solely by bleeding off combustor suppl... | 07/28/1987 |
| 4682900 | Thrust bearing underspring A foil thrust bearing having an underspring formed from a uniform thickness sheet wherein the underspring includes a plurality of arcuate tabs extending toward the thrust disk in the direction of rotation of the thrust runner.... | 07/28/1987 |
| 4681155 | Lightweight, compact heat exchanger A heat exchanger of the type characterized by a plurality of preassembled heat exchanger tubes separated by cooling fins. Each tube is formed from two identical U-shaped members having a folded and unfolded end. The unfolded end of each is slid into the f... | 07/21/1987 |
| 4679984 | Actuation system for variable nozzle turbine A turbocharger having a variable nozzle vane assembly to be used in association with an engine. A plurality of pivotable vanes are mounted between the turbocharger backplate and unison ring on one side and an annular side wall, independent of the turbine ... | 07/14/1987 |
| 4677823 | Diesel engine particulate trap regeneration system A diesel engine exhaust particulate trap and regeneration system for trapping of particulates in the engine exhaust gases and periodic burning thereof. Collected particulates in the trap are burned utilizing a burner means immediately upstream of the trap... | 07/07/1987 |
| 4678398 | High efficiency transonic mixed-flow compressor method and apparatus Method and apparatus for compression of elastic fluids such as air in a rotary continuous flow process particularly of interest in the turbomachinery field. Resulting structure has an envelope or outer diameter favorably comparable with axial flow compres... | 07/07/1987 |
| 4674955 | Radial inboard preswirl system An arrangement for supplying coolant flow to turbine blades in a gas turbine engine is disclosed which utilizes a preswirl assembly to impart a tangential velocity to the coolant flow substantially greater than the tangential velocity of the rotor at the ... | 06/23/1987 |
| 4674276 | Inertial speed control coupling for a gas turbine engine An inertial coupling is provided for substantially preventing rotational speed variations of a free power turbine in a multiple shaft gas turbine engine in response to a transient load condition. The inertial coupling comprises a gear assembly having firs... | 06/23/1987 |
| 4671975 | Radiant heat reflective inflatable structure Radiant heat resistant fluid-distendable structure and methods for making same.... | 06/09/1987 |
| 4671318 | Aircraft engine bleed air flow balancing technique A bleed flow modulator is used in conjunction with pressure regulating valves regulating bleed air pressure from each engine to a common manifold. The bleed flow modulator monitors the pressure drop across a heat exchanger, which pressure drop is proporti... | 06/09/1987 |
| 4668106 | Thrust bearing underspring A foil thrust bearing having an underspring with alternating upper ridges and lower ridges.... | 05/26/1987 |
| 4667123 | Two pole permanent magnet rotor construction for toothless stator electrical machine A two pole permanent magnet rotor utilizes a single cylindrical two pole permanet magnet mounted between two end pieces and surrounded by a retaining hoop. The cylindrical two pole permanent magnet, which is made of high energy product material, is "strai... | 05/19/1987 |
| 4665973 | Environmental control system An environmental control system having an ozone decomposition catalyst coating in the hot pass side of the primary heat exchanger. The environmental control system includes primary and secondary heat exchangers as well as a rotary compressor and a rotary ... | 05/19/1987 |
| 4662817 | Apparatus and methods for preventing compressor surge To prevent surge in a compressor, the flow therethrough is automatically altered when the static pressure differential taken laterally across one of its diffuser vanes approaches a magnitude indicative of a surge condition.... | 05/05/1987 |
| 4659295 | Gas seal vanes of variable nozzle turbine A turbocharger having a variable nozzle vane assembly to be used in association with an engine. A nozzle ring having a plurality of rotatable vanes mounted thereto defining an annular passageway within the turbine housing through which exhaust gas passes ... | 04/21/1987 |
| 4659288 | Dual alloy radial turbine rotor with hub material exposed in saddle regions of blade ring A dual alloy radial turbine rotor with high tensile strength hub material exposed in the saddle regions between the blades to prevent fatigue that causes cracks in the saddle regions is manufactured by producing the hub with additional material at the out... | 04/21/1987 |
| 4656834 | Electronic turbocharger control An electrically responsive turbocharger control for a turbocharged internal combustion engine includes an electrically operated control device selectively energizable to engage and lock in position the actuator for a wastegate control valve. This control ... | 04/14/1987 |
| 4655415 | Helicopter flotation A helicopter flotation pack includes an inflatable flotation bladder secured to an intermediate structural member which includes means for attachment to a helicopter landing skid. The structural member cooperatively defines a sheltered chamber for inflati... | 04/07/1987 |
| 4654941 | Method of assembling a variable nozzle turbocharger A turbocharger having a variable nozzle vane assembly to be used in association with an engine. A nozzle ring having a plurality of rotatable vanes mounted thereto defining an annular passageway within the turbine housing through which exhaust gas passes ... | 04/07/1987 |
| 4654939 | Foil bearing surfaces and method of making same A perforated foil bearing surface having dry lubricant reservoirs dispersed throughout and a method of producing such perforated foil bearing surfaces.... | 04/07/1987 |
