Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 4935661 | Pulsed plasma apparatus and process An apparatus for pulsed plasma treatment of a substrate surface includes means for removing spent gas from a region adjacent the substrate for each pulse. The apparatus may also include means for sweeping an intense plasma region across a substrate surfac... | 06/19/1990 |
| 4914048 | Method of making Bicmos devices A bipolar transistor structure (1) which can be used in an integrated circuit where bipolar (1) and CMOS transistors (2,3) are formed simultaneously on one substrate. In integrated circuit form the material, for example polycrystalline silicon, used for t... | 04/03/1990 |
| 4909607 | Addressing liquid crystal cells A method of addressing a matrix addressed ferroelectric liquid crystal cell is described that uses parallel entry of balanced bipolar data pulses on one set of electrodes to co-operate with serial entry of unipolar strobe pulses on the other set of electr... | 03/20/1990 |
| 4902097 | Optical fibre cables A method of making very long length e.g. 50 km of optical fibre submarine cable in which acrylate-coated fibres (5) are guided by a fixed lay plate (10) and embedded by a fixed trumpet shaped die (7) in a relatively soft thermoplastic polymer coating (3) ... | 02/20/1990 |
| 4886359 | Device for nebuilizing sample liquid for spectroscopical purposes For nebulizing sample liquid for spectroscopical purposes a liquid to be nebulized is pressurized to a minimum pressure of 30 bar through a high-pressure pump formed as a separate unit, and is nebulized through a nozzle having a smallest flow aperture of ... | 12/12/1989 |
| 4882870 | Trawler door A trawler door with relative dimensions such that the height of the door is at most seventy five percent of its length. Two longitudinally arcuate platelike body parts are joined along a longitudinal edge at an obtuse angle, the joint between the body par... | 11/28/1989 |
| 4882543 | Vacuum testing apparatus having a test enclosure with a rotatable sleeve A manual apparatus for testing the vacuum of an evacuated vial. A cylindrical test enclosure having an access opening in the wall thereof is provided for the vial. A rotatable sleeve surrounds the enclosure and has a like access opening in registration wi... | 11/21/1989 |
| 4882207 | Ferroelectric liquid crystal cells A ferroelectric liquid crystal cell is provided with one alignment layer (14) constituted by rubbed nylon which promotes planar alignment in a specific azimuthal direction and the other alignment layer (15) constituted by a polymer with flexible side chai... | 11/21/1989 |
| 4878232 | Data transmission system In a data transmission system data is sent, after suitable conversion, as a ternary analogue type signal. Using two-wire twisted pairs and hybrids, echo cancellation and feedback equalization are needed. Synchronization between the two ends, e.g. of a 144... | 10/31/1989 |
| 4876489 | Signal processing A method of and an arrangement for the combined correction of I/Q phase and amplitude imbalances within channels and interchannel phase and amplitude mismatches in arrays of signal channels. The I and Q channels of a reference channel are orthogonalized w... | 10/24/1989 |
| 4875605 | Pressurized metering dispenser A pressurized metering dispenser comprises a main reservoir, a liquid metering chamber and a gas chamber. A valve arrangement enters the reservoir and the gas chamber from an outlet nozzle at the end of a central passage, the inboard end of which is above... | 10/24/1989 |
| 4874492 | Analysis of samples by electrophoresis using a charge coupled device Light from the pattern of spots of bands resulting from electrophoresis is detected by a two-dimensional charge coupled device, visualization of the spots or band being achieved by irradiating the gel with a U/V source to stimulate fluorescent markers pre... | 10/17/1989 |
| 4874318 | Mounting arangement for a chip carrier An arrangement for mounting a chip (14) to a printed circuit board (10), wherein a lock nut (18) is cemented to the chip carrier to extend through an aperture (28) in a socket moulding (26) and into an aperture (30) in the pcb, the latter also receiving f... | 10/17/1989 |
| 4870407 | Video display apparatus Video display apparatus is described in which video data is held in a dynamic random-access memory (DRAM). In each cycle, one processor access and four video accesses are made to be DRAM. The video data is de-skewed, by feeding it through two registers in... | 09/26/1989 |
| 4866438 | Traffic monitoring device With a traffic monitoring device for photographic recording of vehicles exceeding a predetermined speed, the speed of the approaching traffic is measured substantially against the travelling direction. The vehicles (12) are photographed frontally when the... | 09/12/1989 |
| 4866251 | Removing optical fibre encapsulation Encapsulated optical fibres (FIG. 1A), for e.g. a submarine cable have their encapsulation removed by high velocity hot air blowers (6,7), leave free the acrylate coated fibres for splicing/jointing. An automated equipment moves the blowers progressively ... | 09/12/1989 |
| 4865811 | Apparatus for automatic chemical analysis A sample duct in a carrier line is isolated by three-way valves blocking the flow of carrier or flushing liquid from reservoirs. The sample duct may be connected to a loading syringe and to a sample reservoir respectively by the valves. When the sample du... | 09/12/1989 |
| 4865298 | Tuyere stock for blast furnaces A tuyere stock for a blast furnace comprises three pipes arranged end-to-end. Between the first and second pipes and between the second and third pipes there are flexible bellows units and a pair of links on opposite sides of the second pipe are connected... | 09/12/1989 |
| 4865178 | Single copy vending machine for newspapers and the like A vending machine for dispensing single copies of newspapers or the like by the operation of a pull and push handle that is linked to a plate carrying needles that draw one copy of a newspaper outwardly from a tray through a dispensing door. The newspaper... | 09/12/1989 |
| 4863231 | Active optical fibre star coupler An active optical fibre star coupler having a length of amplifying optical fibre (1) optically connected at one end to a wavelength combining coupler (2) and at the other end to via a beam expanding element (3) to a set of output optical fibres.... | 09/05/1989 |
| 4863057 | Dual locked container system A secure container system comprising a first container with a second container mounted thereon, the container having adjacent sides that are complementary to one another. The first container includes a pair of spaced channels and the second channel includ... | 09/05/1989 |
| 4860906 | Glass container with safety coating A glass container for holding hot liquids and having a shatter resistant plastic coating which resists fragmenting of the glass and which is serviceable for containers that are subjected to intermittent heating and cooling during use.... | 08/29/1989 |
| 4860875 | Roll-block and to a roll-way assembled from roll blocks A roll-way is assembled from roll blocks to permit frictionless displacement of goods or vehicles placed thereupon. The roll blocks contain a base body having a roll surface into which there is embedded a multitude of rolling balls that are closely spaced... | 08/29/1989 |
| 4859025 | Optical fibre cable An aerial optical fiber cable comprises a glass-fibre-reinforced plastics core member (1) having a slot (2) with a zero lay angle accommodating loose-tubed optical fibres (3, 3A) and sheathed with a longitudinal tape (13) bound with a binder (915) and ove... | 08/22/1989 |
| 4858482 | Scissor mechanism in particular for lift tables A scissor mechanism is provided with two scissor arms (1,2) and a hydraulic cylinder (12) which extends between engagement points on the scissor arms (1,2) which are offset from the common bearing (3) of the scissor arms. Between the scissor arms there is... | 08/22/1989 |
| 4854027 | Manufacture of impact printing ribbon cartridge A method of manufacturing a cartridge selectively for multicolor and single color ribbons is disclosed in which the cartridge body is formed with a projection to co-act with a ribbon shift mechanism on a printer to continuously shift a single color ribbon... | 08/08/1989 |
| 4852978 | Liquid crystal cell utilizing a ferroelectric liquid crystal having a natural pitch length is no longer than the longest wavelength of visible light Bistable switching between clear and scattering states is provided by a liquid crystal cell whose liquid crystal layer is constituted by a random orientation planar aligned ferroelectric smectic exhibiting a pitch length comparable with the wavelength of ... | 08/01/1989 |
| 4852943 | Pedestal chairs A pedestal chair has a chassis with a mounting block (16) mounted on the pedestal, a main frame (18) supporting the upholstered seat and back and an intermediate member (20). The block (16) and the intermediate member (20) are pivotally connected about a ... | 08/01/1989 |
| 4852816 | Composting equipment A composting equipment for crushing wood comprises a container, a conveying device and an impact mechanism at its one end. At its other end a driving engine is located which is coupled to the impact mechanism by a power transmission. The conveying device ... | 08/01/1989 |
| 4852326 | Dummy aeroplane The present invention relates to a method for assembling a dummy aeroplane in which a latticework carcass is constructed from the components of an assembly kit and covered with a weatherproof drape. The inventive method is characterized by the sequence of... | 08/01/1989 |
| 4852137 | Imaging of light-opaque specimens by transmission of radiation therethrough A method of and apparatus for imaging light opaque specimens wherein a secondary source (16) is stimulated by radiation (x-rays or high energy electrons or neutrons) transmitted through the specimen (12) and visible light emitted by the secondary source (... | 07/25/1989 |
| 4852065 | Data reorganization apparatus Data reorganization apparatus includes a double buffer arrangement in which data is written into each buffer by rows and is read out by columns. The inputs and outputs of the buffers are time-division multiplexed, which reduces the required width of each ... | 07/25/1989 |
| 4851225 | Material dispensers A dispenser for use, for instance, as a rumen bolus is a generally cylindrical container (1) for material to be dispersed into the digestive tracts, etc. of a ruminant. The container has a closure (3) held in place by a controlled release glass (CRG) memb... | 07/25/1989 |
| 4851064 | Tear-off tape and method of making the same The product of the invention is a plastic tape, for example pressure sensitive plastic adhesive tape, which can easily be manually torn, as from a supply roll, without the use of any tool. At least one edge of the tape is provided with a series of closely... | 07/25/1989 |
| 4851006 | Acetabulum An artificial acetabulum is described comprising a metal cup having on its outer surface means for locking the cup in a pelvic cavity, a hollow locating peg projecting from the base of the cup and integral therewith, and a liner within the cup and having ... | 07/25/1989 |
| 4850329 | Firing mechanisms for air weapons A firing mechanism for an air weapon in which air is compressed in a cylinder and expelled through a discharge port in the cylinder to propel a projectile along a barrel by a piston executing a firing stroke. The mechanism comprises a piston slidably loca... | 07/25/1989 |
| 4849364 | Semiconductor devices A method of manufacturing a bipolar transistor (1) with semi-self-aligned p+ base contacts (27,27a). A p-type base region (28) is formed in a surface region of an n-type region 5 comprising a collector. An element (29) of, for example, n+... | 07/18/1989 |
| 4849001 | Method for making sintered glass A porous water soluble glass body is formed by sintering powdered glass, compacted to a predetermined density, at a temperature near the glass softening temperature (Ts). The porous body may be impregnated with an organic material for subsequen... | 07/18/1989 |
| 4848316 | Trailer adapter for cooking devices A trailer and a trailer adapter for removably supporting a grill of the type having a generally rectangular firebox with opposing longer walls, transverse shorter walls, and a bed extending to form a bottom of the firebox. The trailer adapter has four con... | 07/18/1989 |
| 4847843 | Color center laser fibre and applications thereof Optical fibres comprised of a halide glass incorporating color centers, for example fluoride fibres, can behave as a laser or an amplifier when maintained at a low temperature, typically 77° K., and optically pumped. A laser may be comprised by a length ... | 07/11/1989 |
