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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 |
| 4058978 | Regulating device for metering a supplementary air quantity to improve combustion in combustion engines The present invention relates to a regulating arrangement for metering a supplementary quantity of air for improving the combustion in internal combustion engines or afterburning of exhaust gases. The amount of air entering the regulating arrangement is m... | 11/22/1977 |
| 4054117 | Oil pressure failure protection device for internal combustion engines A device for slowing an internal combustion engine in the event of oil pressure failure at an engine speed above idle, includes an SCR with the gate thereof connected through a resistor to the field winding of the engine generator. The SCR is connected be... | 10/18/1977 |
| 4051829 | Audible enrichment bleed warning device for fuel-injected engines An audible enrichment bleed warning device, for fuel-injected engines having an enrichment bleed, emits an audible warning that the enrichment bleed is open and extra fuel is being delivered to the engine, reminding the operator to close it after the engi... | 10/04/1977 |
| 4044560 | Air pressure regulator arrangement for an internal combustion An air pressure regulating arrangement for regulating charging air pressure of an internal combustion engine which is provided with an exhaust gas turbo-charger including a charging blower and an exhaust turbine. A pressure regulating device responding to... | 08/30/1977 |
| 4033311 | Ignition system with hazardous-start inhibiting interlock An ignition system of an internal combustion engine is provided with a hazardous-start inhibiting interlock that prevents the engine from being started unless an associated engine clutch, transmission, brake or similar device is placed in a safe condition... | 07/05/1977 |
| 4029074 | Fuel valves This is a valve for controlling the flow of fuel to an internal combustion engine in response to engine coolant temperature thereby preventing engine operation at full load above a selected coolant temperature.... | 06/14/1977 |
| 4028804 | Chain saw with throttle control Disclosed is a safety interlock system for restraining certain kinds of movement of a chain saw throttle actuator. The system includes a stop member having an abutment portion for engaging the throttle actuator and a release portion projecting from a surf... | 06/14/1977 |
| 4029073 | Automatic motor kill system for preventing damage to a heavy equipment motor due to a dirty air filter The specification discloses a motor kill system for automatically shutting off and killing an internal combustion engine to prevent damage to the engine from obstruction of the air cleaning system. The motor kill system includes a vacuum switch operating ... | 06/14/1977 |
| 4023549 | Exhaust temperature monitoring system An exhaust temperature monitoring unit including a thermocouple connected in summation with a regulated signal across the differential inputs of an operational amplifier to provide a temperature signal which is independent of the thermocouple ground. The ... | 05/17/1977 |
| 4023550 | Engine with overspeed prevention An engine with an air vane type governor and provision for preventing overspeeding of the engine in the event the governor fails to do so, wherein a normally restrained or loaded spring acts to effect closing adjustment of the throttle valve upon release ... | 05/17/1977 |
| 4023358 | Internal combustion engine reactor protective control system A sensing means is provided to monitor combustion of fuel and air supplied to an internal combustion engine, for example by sensing ignition pulses, combustion pressure, or cylinder temperature. Signals, as sensed, are compared and if one of these signals... | 05/17/1977 |
| 4022179 | Vacuum controlled throttle positioner and dashpot An integral device for controlling the rate of throttle closure and for preventing after run of an internal combustion engine is provided which utilizes a pair of diaphragm assemblies for accomplishing both functional operations. The device includes a das... | 05/10/1977 |
| 4019489 | Safety apparatus for engines A monitoring and control apparatus for an engine, particularly a water-cooled internal combustion marine engine, which includes devices for monitoring the temperature and/or flow of the coolant liquid and/or of the lubricant, the monitoring devices being ... | 04/26/1977 |
| 4016851 | Safety control method and device for limiting the temperature of a fluid to a given upper value A safety control method for limiting the temperature of a fluid to a given upper value comprising the sensing of the fluid temperature and the control of a servo-motor keyed in follow-up relationship to said temperature and acting upon a member controllin... | 04/12/1977 |
| 3993038 | System for preventing drive train start of a motor vehicle internal combustion engine A solenoid operated valve is installed in the fuel supply line of an internal combustion engine and is effective to interrupt the flow of fuel to the engine while the operating solenoid thereof is energized. A normally closed contact pair of an electrical... | 11/23/1976 |
| 3983859 | Water sprinkler system internal combustion engine control The invention comprises a plurality of fluid actuated members for interrupting the ignition circuit and stopping the operation of an internal combustion engine in the event of a malfunction of the engine or components driven thereby. A tank containing air... | 10/05/1976 |
| 3977371 | Throttle motion indicator device A throttle motion indicator device for an internal combustion engine of a vehicle having an induction system including a movable throttle for controlling flow through an induction passage and, an operator actuated accelerator pedal linkage, including a th... | 08/31/1976 |
| 3977384 | Internal combustion engine oil pressure loss safety device A safety device for an internal combustion engine with a liquid cooling system, in which the internal combustion engine is stopped by interruption of the fuel supply when the lubricating oil pressure drops below a minimum lubricating oil pressure correspo... | 08/31/1976 |
| 3973546 | Starter safety device An electric safety switch assembly for an internal combustion engine, the engine being provided with an oil pump to supply oil to a oil line for lubricating the engine, and an electric operated starter for the engine, including a manually operatable start... | 08/10/1976 |
| 3971356 | Solenoid-dashpot A unitary device for controlling the rate of throttle closure and for preventing after run of an internal combustion engine is provided with simplified structure, the structure using a single shaft assembly for both functional operations. The shaft assemb... | 07/27/1976 |
| 3964567 | Low coolant level protection system A low coolant level protection system for a vehicle having a radiator, an engine operated by a fluid fuel, a fuel source, and a conduit connecting the fuel source with the engine, the low water protection system including a probe extending within the radi... | 06/22/1976 |
| 3960133 | Fuel saving apparatus Apparatus is disclosed which is useful for conserving fuel and which comprises a means for preventing or controlling the opening of a valve, commonly called a butterfly valve, of a carburetor, beyond a pre-selected point whereby the flow of fuel into the ... | 06/01/1976 |
| 3958547 | Spring-loaded fuel storing device What follows is the description of a spring-loaded device for use in the fuel system of an internal combustion engine. The device includes a spring-loaded membrane connected to a valve which in turn provides access to atmospheric air. The arrangement is s... | 05/25/1976 |
| 3958548 | Engine with differential pressure responsive protective device An internal combustion engine is provided with an engine driven pump forced cooling system that is closed to permit operation at elevated pressures and temperatures. A protective device is provided to stop or otherwise modify normal engine operation upon ... | 05/25/1976 |
| 3955363 | Combustion engine with at least one exhaust gas cleaning arrangement In a motor vehicle having a combustion engine including combustion spaces, such as pistons, comprising fuel dosing device, an exhaust gas conduit system and an exhaust gas cleaning arrangement associated with the exhaust gas conduit system, a temperature ... | 05/11/1976 |
| 3954092 | Feed tube flame arrester A feed line for conveying gasoline from the air side of an engine diaphragm fuel pump to the intake manifold consists of a tube having an interior strip with a width equal to that of the inside diameter of the tube wound into a spiral along its length and... | 05/04/1976 |
| 3947073 | Device for reducing the braking effect of the engine of a motor vehicle equipped with an anti-skid braking system An anti-skid braking system which includes a throttle control arrangement associated with the throttle plate located in the induction manifold for opening the plate upon operation of the anti-skid system in order to compensate for the braking effect of th... | 03/30/1976 |
| 3943907 | Throttle return systems for carburettors A carburettor throttle member is provided with two return springs. The first spring is tensioned between the carburettor body and a disk rotatably mounted on the carburettor shaft. The second spring is weaker than the first spring and is compressed betwee... | 03/16/1976 |
| 3931797 | Automobile engine carburetors An improved automobile engine carburetor in which a portion of the fresh air flowing into a carburetor main housing is bypassed through an auxiliary housing encasing a coiled bimetallic strip for controlling the position of a choke valve, so that the inte... | 01/13/1976 |
