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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 4442791 | Adhesive compound coating apparatus An adhesive compound coating apparatus for coating an adhesive compound on leading and trailing beveled end faces of a rubber strip material, comprising: a conveyor unit for conveying the strip material in its longitudinal direction; a coating roller disp... | 04/17/1984 |
| 4442792 | Hog finishing building A finishing building for hogs designed to defer to the natural laws of biological behavior. The building design allows the hogs to satisfy their exploratory drive while still providing areas for the hogs to rest, feed, etc. if they wish. The design of the... | 04/17/1984 |
| 4442793 | Easy-to-clean birdhouse This disclosure relates to an easy-to-clean birdhouse which includes a body defining a chamber closed at one end by a roof and at a lower end by a floor upon which a nest can be built, the floor being normally disposed horizontally and being mounted for e... | 04/17/1984 |
| 4442794 | Apparatus for catching cattle Apparatus for automatically tethering a cow in a tie stall of a type having a milking pad for providing a place for a cow to stand and having partitions for separating a feed bunk from a milking pad, an access opening for allowing the head and neck of a c... | 04/17/1984 |
| 4442795 | Recirculating fluidized bed combustion system for a steam generator The invention comprises a steam generator fluidized bed which recirculates through a major portion of the normal gas to fluid heat transfer circuits. Solid bed material is separated, collected and recirculated. Bed temperatures are limited by regulation o... | 04/17/1984 |
| 4442796 | Migrating fluidized bed combustion system for a steam generator The invention comprises a steam generator having a migrating fluidized bed combustor system. The bottom, head end of the bed incorporates a support floor system through which air is admitted tangential to the floor in a manner which causes the bed to migr... | 04/17/1984 |
| 4442797 | Gas and particle separation means for a steam generator circulating fluidized bed firing system The invention comprises a steam generator having a circulating fluidized bed firing system. Particles of fuel and solid inert material are recirculated in a furnace wherein gas velocities are maintained at levels sufficient to entrain the fuel and inert m... | 04/17/1984 |
| 4442798 | Vent assembly A vent assembly adapted for venting into the atmosphere hot burner exhaust gases from the flue exhaust port of a heating appliance within an enclosure, such assembly including an exhaust duct and a relief duct. The exhaust duct is connected at one end to ... | 04/17/1984 |
| 4442799 | Heat exchanger In a heat exchanger of the type in which hot exhaust gases transfer heat to water or the like flowing through a helical heat exchange coil, the use, as a significant improvement to the efficiency of the heat exchange occurring therebetween, of a conduit f... | 04/17/1984 |
| 4442800 | Single drum all-welded boiler A single drum all-welded boiler system is disclosed for a furnace having a combustion chamber and a convection pass connected to the combustion chamber in a transition area, comprising a superheater in the transition area, an economizer in the convection ... | 04/17/1984 |
| 4442801 | Electrolysis fuel supplementation apparatus for combustion engines A combustion engine is provided with a fuel supplementation system in which water is broken down by electrolysis into hydrogen and oxygen which are then added to the fuel delivery system. The electrolysis takes place in a chamber in which a pusher gas ris... | 04/17/1984 |
| 4442802 | Internal combustion engine water injector An auxiliary apparatus for injecting water into the intake manifold of an automotive internal combustion engine at an adjustable visible rate that is related to the number of cylinders of the engine to achieve increased mileage from the vehicle and power ... | 04/17/1984 |
| 4442803 | Light metal cylinder head for internal combustion engines A light metal cylinder head for internal combustion engines, with a metal plate arranged on the cylinder head bottom. The plate has an annular insert on its outer periphery. The annular insert is arranged on the cylinder head and/or cylinder pipe in such ... | 04/17/1984 |
| 4442804 | Glow plug controller for diesel engines A glow plug controller for diesel engines includes a two-chamber housing, with a low-level control circuit module in a first chamber and a high-level switching means in the form of a relay or contactor in a second chamber, so that the controller can be re... | 04/17/1984 |
| 4442805 | Internal combustion engine provided with a plurality of power units An internal combustion engine comprising a primary engine unit and an auxiliary engine unit, in which the auxiliary engine unit is connected to an output shaft of the primary engine unit under conditions both engine units are balanced in output torque and... | 04/17/1984 |
| 4442806 | Valve driving control apparatus in an internal combustion engine A valve driving control apparatus in an internal combustion engine comprises a plurality of power cylinders each having a plurality of intake and exhaust reciprocating valves which are made operative or inoperative depending upon the load conditions of th... | 04/17/1984 |
| 4442807 | Method for igniting lean fuel-air mixtures and an apparatus to perform the method A method for igniting lean fuel-air mixtures and an apparatus for performing this method are described, wherein a preferably insertable ignition chamber is provided in the wall of an internal combustion engine, which ignition chamber communicates with the... | 04/17/1984 |
| 4442808 | Combustion chamber for spark ignition internal combustion engine A piston has formed in the top thereof a part-spherical depression which forms part of a combustion chamber. The depression is so formed as to permit the flame front during the initial stage of combustion to reach the surface of the depression substantial... | 04/17/1984 |
| 4442809 | Combustion chamber of an internal combustion engine with an accumulation chamber An internal combustion engine comprises a cylinder block and a cylinder head. A combustion chamber is formed in the cylinder block and the cylinder head. An accumulation chamber is formed within the cylinder head and communicated with the combustion chamb... | 04/17/1984 |
| 4442810 | Regulating device for a fuel injection pump A regulating device for the supply quantity of an injection pump for internal combustion engines having an electromagnet system as a component of a fuel quantity final control element is proposed. The fuel quantity final control element effects the contro... | 04/17/1984 |
| 4442811 | Method and apparatus for expediting the starting of an internal combustion engine Apparatus and method for expediting the starting of an internal combustion engine in which a vacuum-operated throttle actuator is controlled by a vacuum passage connected therewith and extending from an intake vacuum outlet located adjacent to the throttl... | 04/17/1984 |
| 4442812 | Method and apparatus for controlling internal combustion engines A control method for an internal combustion engine equipped with an electronically controlled fuel injection system in which at least one of the control variables of the engine is corrected in accordance with engine speed and intake pressure. The amounts ... | 04/17/1984 |
| 4442813 | Method of and apparatus for controlling the ignition timing of an internal combustion engine The ignition timing of an internal combustion engine is controlled to a fixed value during starting or for a period just after starting. However, if the engine is in a high-speed operating condition, the above control for fixing the ignition timing is int... | 04/17/1984 |
| 4442814 | Spark timing control system A spark timing control system for reducing engine noise in an internal combustion engine utilizing a sensor for detector for detecting engine vibration, a filtering device receiving the output of the sensor and passing frequency components within a range ... | 04/17/1984 |
| 4442815 | Optimum air-fuel ratio control for internal combustion engine In an air-fuel ratio control system the air-fuel ratio is changed by changing the auxiliary air supply amount in a bypass path with respect to a main path for supplying air to the engine in the vicinity of an optimum air-fuel ratio. Signals representing t... | 04/17/1984 |
| 4442816 | Fuel injection pump for internal combustion engines The vane-cell pump of a fuel injection pump for internal combustion engines has one or more adjustable throttle restrictions disposed on the intake side and/or on the compression side. By adjusting the particular throttle restriction, the slope of the cha... | 04/17/1984 |
| 4442817 | Electronically controlled fuel metering system An electronically controlled fuel metering system for an internal combustion engine is proposed which has mixture regulation which can be switched on and off depending upon the operational state of the engine. The system for mixture regulation includes an... | 04/17/1984 |
| 4442818 | Fuel injection apparatus for internal combustion engines A heat-type flow sensor is provided on the upstream side of a Venturi portion formed in an air-intake path and in an air bypass communicating with the Venturi portion. An electromagnetic device is provided to control the amount of air flowing in the air b... | 04/17/1984 |
| 4442819 | Heater for a diesel fuel filter A heater (16) for heating diesel fuel in a fuel filter (15) to prevent jelling of the diesel fuel is disclosed. The heater (16) includes a receptacle (34) having an open top and an internal cavity (35). The fuel filter (15) is positioned in the internal c... | 04/17/1984 |
| 4442820 | Exhaust recirculation system for internal combustion engines In an exhaust gas recirculation system including a recirculation passage to provide a communication between an intake pipe and an exhaust pipe of an internal combustion engine, a flow control valve associated with a pneumatic servomotor to control the qua... | 04/17/1984 |
| 4442821 | Internal combustion engine ignition method In order to improve the cold starting efficiency of a an internal combustion engines using alcohol or low cetane type fuel, an ignition method provides an ignition mode in which a plurality of energizations of the ignition plugs per cycle is effected duri... | 04/17/1984 |
| 4442822 | Ignition position controlling apparatus for multicylinder internal combustion engine An ignition position controlling apparatus for a multicylinder internal combustion engine is disclosed which is capable of generating clock pulses and cylinder discriminating signals for detecting proper angular positions necessary to determine the igniti... | 04/17/1984 |
| 4442823 | Ball throwing machine and system having three individually controllable wheel speeds and angles A pitching machine and control system which will pitch any baseball pitch desired on command with all parameters of each pitch chosen before the pitch of the ball. The system measures and counteracts the effects of the prevailing weather upon the ball the... | 04/17/1984 |
| 4442824 | Accessory grill converter A top grill converter for a conventional outdoor electric or gas-fired grill is disclosed. The converter is a cartridge having side, front and back walls, a foraminous floor and a roof-forming undulated heat shield. Contained within the cartridge are pref... | 04/17/1984 |
| 4442825 | Fuel feeder device for space heating stoves A detachable fuel feeder device for use with wood stoves is disclosed comprising an inclined fuel storage chamber adapted for alignment with the door opening of the wood stove, a dog clamp for detachably mounting the chamber to the wood stove, a door pivo... | 04/17/1984 |
| 4442826 | Prefabricated panel for building construction and method of manufacturing A precast construction panel for buildings and a method of manufacturing the panel are disclosed. The panel is lightweight and possesses full structural integrity with the ability to serve as a solar energy collector and/or storage module alone or in a sy... | 04/17/1984 |
| 4442827 | Solar heat collector A compact, self-contained solar heat collector is disclosed which is particularly suited for addition to new or existing structures in the form of window shutters, exterior siding, awnings, columnar elements and the like. The exterior glazing (32) of the ... | 04/17/1984 |
| 4442828 | Portable type solar heat cooker assembly A portable type solar heat cooker assembly including a cooking glass tube comprising an outer bottomed glass tube and an inner bottomed glass tube coated with a selective absorption film showing a high absorptivity in the solar radiation spectrum zone and... | 04/17/1984 |
| 4442829 | Material for selective absorption of solar energy and production thereof Materials comprising aluminum having a purity of 99.92% by weight or more as a substrate and a porous anodic oxide film of 3μ or less in thickness formed on the surface of the substrate and metal particles electrochemically filled in the micropores of th... | 04/17/1984 |
| 4442830 | Mouth douche A mouth douche including a water reservoir, a water pump and a nozzle insertable into the oral cavity is provided with a detachable power unit operable by a preferably rechargeable battery. The power unit advantageously is the body of an electric toothbru... | 04/17/1984 |
