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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 |
| 4341097 | Hosiery article with a reinforced toe with varying density A reinforced toe with varying density is provided for hosiery articles such as sheer stockings, pantyhose and the like so that there is no sharply contrasting line of demarcation between the sheer fabric in the foot portion and the reinforced fabric in th... | 07/27/1982 |
| 4341098 | Jet pattern dyeing of material, particularly carpet High performance apparatus for pattern dyeing of textile material by means of a plurality of controlled liquid dye streams. The textile material is conveyed in web form beneath one or more applicators each including a plurality of closely spaced nozzle tu... | 07/27/1982 |
| 4341099 | Code changing system for combination padlocks A code changing mechanism for padlocks of the type comprising code wheels and lock operating bushings releasably connected to the code wheels in which axial movement of the shaft disengages the bushings from the code wheels to permit changing of the code,... | 07/27/1982 |
| 4341100 | Portable certificate magazine A magazine for a cash dispensing machine including a lock which can be activated at a loading station to trip if later tampered with thereby to prevent installation of the magazine.... | 07/27/1982 |
| 4341101 | Combination locks A dial and sleeve type combination lock is provided with a shift member to move the sleeves out of coupling engagement with the dials for changing the combination of the lock. The shift member includes a manual actuator portion extending through an openin... | 07/27/1982 |
| 4341102 | Construction for a cylinder lock and key The invention relates to an improved construction for a cylinder lock and key, more particularly to a cylinder lock which has a plurality of pin tumblers of different lengths and diameters arranged radially about the axis of a rotatable cylinder, a pin tu... | 07/27/1982 |
| 4341103 | Spin-necker flanger for beverage containers A method and apparatus for beading canbodies, or like hollow members having at least one terminal end edge, a first annular end portion adjacent said terminal end edge, a second annular end portion adjacent said first annular end portion and a third annul... | 07/27/1982 |
| 4341104 | Press brake plate lifter table An improved press brake plate lifter comprising a pneumatically operated support surface or table wherein the angle of the support surface can be accurately pre-adjusted to match the angle of the die. The pre-adjusted support surface is rotatably lifted s... | 07/27/1982 |
| 4341105 | Force multiplier for punch presses A force multiplier for a punch press which is sufficiently compact as to be placed in the normal throat opening of such press and yet enables the press to increase its working force by one and one-half to three times. The multiplier has a platen having a ... | 07/27/1982 |
| 4341106 | Apparatus for controlling the movement of a reciprocatory hydraulically driven element of a metal forming machine A method and apparatus are provided for controlling the movement of a reciprocatory hydraulically driven element of a metal forming machine between extended and retracted positions. Two piston members, having different sized working areas are slidably mou... | 07/27/1982 |
| 4341107 | Calibratable system for measuring fluid flow A pair of mass flow sensors are used to separately monitor the mass flow rates of a carrier gas and of a mixture of carrier gas and source vapor formed a mixing station. The rates are compared, for example by substracting the carrier gas flow rate from th... | 07/27/1982 |
| 4341108 | Mass flow-dependent gas analyzer with through-flow control during low pressure operation By means of a suction pump located at the outlet of the analyzer device and a combination of choke members connected in parallel in a row and respective low pressure controllers at the outlet of the gas analyzer and at the connection point of the series c... | 07/27/1982 |
| 4341109 | Method and apparatus for determining cigarette filter rod pressure drop Method and apparatus for determining true cigarette filter rod pressure drop, especially of nonwrapped and soft wrapped filter rods when the circumference thereof is being compressed by an encapsulation method as by an elastic sleeve, the pressure drop an... | 07/27/1982 |
| 4341110 | Percolation testing method and apparatus Apparatus for automatically recording the rate of fluid absorption of the soil includes three subsystems which may be easily assembled on site. During a test procedure the rate of descent of a float is recorded on a tape by a timer controlled marker.... | 07/27/1982 |
| 4341111 | Process and apparatus for determining the visco elastic characteristics of fluids Process and apparatus for determining visco-elastic characteristics of specimens such as fluids and/or of polymerizing mixtures, especially of coagulation fluids such as blood or blood plasma, and their temporal changes by determining the resonance freque... | 07/27/1982 |
| 4341112 | Measurement of soil moisture A method and apparatus for measuring the moisture content of bulk material which involves placing a length of leaky co-axial cable in the bulk material so as to be buried therein and spaced from an electro-magnetic sensor in the region of interest. A sign... | 07/27/1982 |
| 4341113 | Inspection system for heat exchanger tubes A system for inspecting the relatively long, thin-walled, small-bore tubes of a heat exchanger provided with support plates for holding the tubes in predetermined positions, comprising a composite scanner having a plurality of flexure springs contacting t... | 07/27/1982 |
| 4341114 | Apparatus for burnoff of a resistor, in particular of a hot wire in an air flow rate meter of an internal combustion engine An apparatus is proposed for burnoff of deposits from at least hot wire and/or hot film resistors in the air flow rate measurement circuit of an internal combustion engine, wherein during the burnoff procedure a separate electric current circuit is furnis... | 07/27/1982 |
| 4341115 | Method and apparatus for monitoring structural and mechanical properties of drilling mud A method of monitoring structural and mechanical properties of drilling mud and a device for realizing this method includes the determination of the viscosity of drilling mud via a viscosimeter and the determination of the shear strength of the mud via a ... | 07/27/1982 |
| 4341116 | Liquid absence detector A system is provided for detecting the absence of liquid in a liquid chamber. A signal is transmitted through a liquid chamber and a signal is provided in response to the amplitude of the received signal. A receiving transducer receives an AC signal which... | 07/27/1982 |
| 4341117 | Electronic thermometer An electronic computer which provides an accurate final temperature reading prior to the actual stabilization of the temperature sensor. An algorithm is provided which allows making only two temperature measurements at preselected times yet accurately pre... | 07/27/1982 |
| 4341118 | Temperature verification apparatus Tamper proof apparatus for verification that a critical temperature has been reached or exceeded includes a permanently sealed casing and cap containing a thermal element connected to a rotatable cam having a temperature indicator extending outwardly ther... | 07/27/1982 |
| 4341119 | Data input system for dynamic balancing machine For a dynamic balancing machine the values of parameters employed to determine the weight, rim spacing and diameter of a wheel are automatically entered into the balancing machine by a single maneuver of an extensible wand. This simplicity eliminates many... | 07/27/1982 |
| 4341120 | Ultrasonic volume measuring system An improvement in an ultrasonic imaging system is disclosed, enabling determination of volume and/or shape of three-dimensional portions of bodily tissue or the like. The improvement is applicable to ultrasonic imaging systems of the type adapted for exam... | 07/27/1982 |
| 4341121 | Method and apparatus for testing the resetting capacity of safety ski bindings which are for example mounted on skis Safety ski bindings offer an adequate safeguard against erroneous release if they possess an adequately large resetting capacity. To test this resetting capacity, the ski boot is repeatedly displaced through a constant distance by a pressure pin applying ... | 07/27/1982 |
| 4341122 | Force measuring device In a device for simultaneously measuring radial and axial forces with the aid of measuring positions (24, 25, 26, 27) arranged at roller bearings and formed by resistance strain gauges, possibilities for eliminating apparent axial forces, which could fals... | 07/27/1982 |
| 4341123 | Torque-measuring tape cassette A cassette for measuring the torque output of the tape drive of a cassette recorder and/or player has a housing with two hubs, to which the ends of a tape are connected. A slide is displaceable against the force of a spring and carries a tape-deflecting r... | 07/27/1982 |
| 4341124 | Automatic sampling apparatus An automatic sampling apparatus for particles suspended in liquid, which maintains particles in suspension by periodically directing and redirecting the liquid first down one branch of a manifold and then down another, and which selectively directs the li... | 07/27/1982 |
| 4341125 | Devices for extracting a sample of fluid from a hydraulic circuit The present invention concerns a device for extracting a sample of fluid from a hydraulic circuit having an extraction take-off, for detection of impurities. The device comprises in particular a body (10, 12) provided with a ferrule (14), capable of fitti... | 07/27/1982 |
| 4341126 | Variable amplitude vibratory apparatus A vibratory apparatus comprises a shaft mounted for rotation about an axis and having weight structure mounted thereon to effect vibration in response to shaft rotation. The shaft may be initially balanced or unbalanced. According to a first series of emb... | 07/27/1982 |
| 4341127 | Multiple-speed transmission of countershaft construction which can be shifted under load A multiple speed transmission with a plurality of shafts and gears and divided into a number of shift units. Insofar as possible, the respective corresponding shafts and gears among the shift units have substantially the same pitch dimensions. In a multi-... | 07/27/1982 |
| 4341128 | Device for moving a slidable stage on a two-dimensional plane A pair of parallel lead screws are meshed with a pair of helical racks provided on opposite faces of a movable stage slidable on a flat or cylindrical base plate. The pair of parallel lead screws are driven by a pair of electric motors independently of ea... | 07/27/1982 |
| 4341129 | System of changing travelling speed of working vehicle A system of changing the travelling speed of a working vehicle in which a stepless speed-change means is operated by a pedal. Said system has a cam mechanism by which the pedal may be fixed at the desired position, and a first manual lever for operating t... | 07/27/1982 |
| 4341130 | Dust and oil slinger A torsional vibration damper of the type having an inertia ring member and a hub member coupled together by an elastomer member. The hub member may be in the form of a disc and is adapted to be coupled to a rotating shaft subject to torsional vibrations, ... | 07/27/1982 |
| 4341131 | Hydromechanical transmissions A three-mode, hydromechanical transmission including a pair of hydraulic displacement units forming a hydrostatic transmission and having a first, low-speed hydrostatic mode and a second and third intermediate and high speed hydromechanical modes. In one ... | 07/27/1982 |
| 4341132 | Continuously variable ratio power transmission A power transmission is provided characterized by smoothly and continuously variable gear ratios between the input and output shaft by incorporating a no-load restraint means for the ring gear of a ring, planetary and sun gear transmission system, the res... | 07/27/1982 |
| 4341133 | Control system for a hydraulically driven vehicle A control system for a hydraulically driven vehicle having a pair of variable displacement hydraulic pumps driven by an engine and a pair of hydraulic motors each being connected with the respective variable displacement hydraulic pumps in a closed loop a... | 07/27/1982 |
| 4341134 | Tool for stripping insulating covering There is disclosed a tool for stripping the insulating covering from a covered electrical wire which comprises one handle pivoted by means of a shaft to the other handle having a lower jaw at the leading end portion thereof and in which the leading portio... | 07/27/1982 |
| 4341135 | Method of and apparatus for cutting a plate into small sections A large rectangular plate is subdivided into small rectangular sections in a system wherein the plate is fed stepwise in a main direction through an upstream shear while the downstream end portion of the plate is seized immediately downstream of the shear... | 07/27/1982 |
| 4341136 | Food processing machine The machine includes a horizontal base plate on which a plurality of vertical tubes are mounted, apertures in said plate being disposed beneath said tubes so food products are free to pass down through the tubes and the plate. Stop means below the plate l... | 07/27/1982 |
