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| Number | Title | Issue Date |
| 4441096 | Optical analog-to-digital converter A method and apparatus for converting the intensity of an unknown optical signal (B) into an electrical signal in digital form utilizes two elongated optical attenuators (11, 13), one for the unknown optical signal from a source (10) and one for a known o... | 04/03/1984 |
| 4429655 | Single leg terminal A single leg mooring terminal is described, of the type which includes a riser extending up from the sea floor to moor a vessel, and a separate fluid conduit extending up from the sea floor to carry oil to or from the vessel, and wherein the riser and hos... | 02/07/1984 |
| 4425534 | Linear motor velocity sensor A velocity sensing method and apparatus to be used in conjunction with a linear motor having a moveable voice coil. More particularly, an apparatus is disclosed whereby a velocity sensing loop is positioned on a surface defined by wire windings of a linea... | 01/10/1984 |
| 4423696 | Improved boat thruster system including swirl reducing vanes An improved boat thruster system including a pump for drawing water through an inlet in the boat hull and for discharging water through outlets on both sides of the hull. The improved system includes a plurality of substantially planar vanes mounted in th... | 01/03/1984 |
| 4422401 | Raised anchor point catenary mooring system A mooring system is provided, of the type that includes several chains extending in loose curves from a mooring buoy at the sea surface to spaced anchor locations at the seabed, which enables the buoy to deflect sidewardly by a further distance and to abs... | 12/27/1983 |
| 4421009 | Repeating firearm A machine gun pistol is described, which can be reliably switched between semi and full automatic modes by an operator holding the gun in a natural two-hand grip. The gun includes a bolt (20, FIG. 1) and a firing pin device (22) that each slide longitudin... | 12/20/1983 |
| 4420839 | Hybrid ring having improved bandwidth characteristic A hybrid ring useful in the microwave and millimeter wave regions as a mixer for producing an IF output signal in response to applied LO and RF input signals. The ring is designed to exhibit a narrow bandwidth at the LO signal port and a moderately broad ... | 12/13/1983 |
| 4419836 | Footwear in the form of a sandal A sandal useful especially in wet areas and also where there is soft ground such as at the beach. The sandal has opposite side edges that slope in a downward-outward direction, to provide a wider foot print that minimizes sideward twisting on soft ground,... | 12/13/1983 |
| 4418767 | Interchangeable valve system for hydraulic reversal of positive feed drill In a positive feed power drill having a spindle drive gear train and a spindle feed gear train, and having hydraulic (air) means for actuating a piston to disengage the feed gear train for automatic retraction of the spindle, provision is made for field a... | 12/06/1983 |
| 4415963 | FET commutated current-FED inverter A shunt switch comprised of a field-effect transistor (Q1) is employed to commutate a current-fed inverter (10) using thyristors (SCR1, SCR2) or bijunction transistors (Q2, Q3) in a full bridge (1, 2, 3, 4) or half bridge ... | 11/15/1983 |
| 4410430 | Stacked-disc structure for fluid filter or valve silencer A stacked-disc structure is comprised of a stack of annular discs (13) scalloped along the outer edge to provide lobes (13a) and etched on one side to provide lands (13a). A web (13d) is retained in the lobes to strengthen the discs so that they will not ... | 10/18/1983 |
| 4410160 | Means and method for attaching fan and fixture units or the like substantially flush with a ceiling An arrangement for attaching a fan-fixture unit substantially flush with a ceiling includes first and second bowl shaped circular members with cylindrical rims. One of the members is fixedly attached to the ceiling electrical outlet box and the other to t... | 10/18/1983 |
| 4409977 | High frequency ventillator High frequency medical breathing apparatus is provided, which delivers efficiently controlled high frequency air pulses to a catheter, and which is of relatively low cost and is energized by pressured air that is commonly available in a hospital environme... | 10/18/1983 |
| 4408339 | Compact X-ray unit A chest X-ray unit is provided which is of compact design and which can be easily utilized. The apparatus includes an exposure station at the front where a film sheet can be tightly held between a pair of intensifier screens, a supply station behind the e... | 10/04/1983 |
| 4404529 | Lowpass filter with electronic control of cutoff and resonance A lowpass filter circuit having an electronically controllable cutoff frequency and utilizing a feedback current mirror circuit as a variable impedance element. The filter circuit employs low noise, low distortion output circuitry and includes means for e... | 09/13/1983 |
| 4401390 | Ribbon control system for multiple color impact printer A printer/plotter system for producing a multiple color hard copy output in response to digital input data. The system includes one or more impact hammers, each capable of printing a single dot with the hammers being arranged to selectively print dots alo... | 08/30/1983 |
| 4400827 | Method and apparatus for calibrating rapid sequence radiography By moving a wedge (18) within the radiographic field during exposure of an area of interest, steps of the wedge are presented one by one at the same film location over sequential exposures. Wedge steps are thus superimposed over an identical position with... | 08/23/1983 |
| 4397893 | System for flame spray coating of a rod A system is described for coating a cylindrical surface of a long thin workpiece by a process which includes flame spray coating that heats the workpiece to a large portion of its melting temperature and which is followed by grinding of the coated cylindr... | 08/09/1983 |
| 4396046 | Buoy-to-yoke coupling system A mooring and fluid transfer system of the type which utilizes a yoke pivotally connected at its opposite ends to a ship and to a buoy, which enables the use of hard piping along the fluid conduit which couples the buoy to the ship. A cross arm whose midd... | 08/02/1983 |
| 4394711 | Circuit board with weldable terminals A circuit board apparatus of the type which has multiple connection regions that can each make a solder connection to the lead of a component and a weld connection to a wire, which minimizes the possibility of damage to the region during wire welding and ... | 07/19/1983 |
| 4394613 | Full-charge indicator for battery chargers A full-charge indicator for battery chargers, includes a transistor which is in a conductive state as long as charging current to the battery is not less than a level which indicates that the battery did not reach full charge. When the battery reaches ful... | 07/19/1983 |
| 4391261 | Carburetor actuating system for V-engines A carburetor actuating system for two carburetors (5a, 5b) in V-shaped space (4) between two cylinders (2a, 2b) of a V-engine such that drafting directions of the respective carburetors are opposite to each other. One carburetor (5b) is controlled by a ca... | 07/05/1983 |
| 4390844 | Integration filter for step waveforms A method and apparatus for converting an input step waveform signal into a smooth output waveform signal is comprised of two sample-and-hold circuits (11, 12), one for sampling each step of the input signal and the other for synchronously sampling and hol... | 06/28/1983 |
| 4387499 | Leader to hub locking system Apparatus for installing a tape leader on a hub, including a resilient locking member which can be projected into an undercut slot in the hub to press in a portion of the tape leader and lock it therein. A punch moves the locking member towards the hub sl... | 06/14/1983 |
| 4386602 | Intracranial surgical operative apparatus Apparatus for operating on the brain with minimal disturbances thereto, including a bullet-shaped expandable device with an end that can be closed for insertion through a small hole in the brain. The device can be expanded after insertion to leave an air ... | 06/07/1983 |
| 4385524 | Compact shake mechanism A mechanism is provided for oscillating a shake table or other member at high accelerations but over short distances. The mechanism includes a group of pad devices supporting the shake table on a base, with each pad device including upper and lower curved... | 05/31/1983 |
| 4384555 | Cap for larger end portion of connecting rod of two-stroke internal combustion engine An internal combustion engine having a connecting rod (7) secured to a crankshaft (5) over a bearing (6) by a cap (1), holes in the cap for lubricating the cap side of the connecting rod are improved by providing for at least two holes (A2, A | 05/24/1983 |
| 4384321 | Unity power factor switching regulator A single or multiphase boost chopper regulator operating with unity power factor, for use such as to charge a battery is comprised of a power section for converting single or multiphase line energy into recharge energy including a rectifier (10), one indu... | 05/17/1983 |
| 4384309 | Closed loop servo demodulator for positioning a servo head An improved servo demodulator channel employing a transconductance balanced modulator as a polarity switch, an AGC amplifier and a signal separation circuit. A transconductance balanced modulator comprises two amplification transistors and four output tra... | 05/17/1983 |
| 4382655 | At grade optical crossover for monolithic optial circuits Planar optical circuits may be made to cross through each other, (thus eliminating extra steps required to fabricate elevated, nonintersecting crossovers) by control of the dimensions of the crossing light conductors (10, 12) to be significantly greater t... | 05/10/1983 |
| 4381831 | High frequency horn A loudspeaker horn is described, which produces good coupling of sound to the atmosphere, while avoiding perturbations in magnitude and phase that would produce large narrow-frequency losses or transient distortions. The horn includes a major sound-reflec... | 05/03/1983 |
| 4380951 | Mud pump piston assembly A mud pump piston assembly is provided which facilitates replacement and secure holding of piston parts which wear rapidly. A double acting piston includes a piston rod, a pair of hollow piston members on the rod, and a pair of wear rings located between ... | 04/26/1983 |
| 4376637 | Apparatus and method for destructive removal of particles contained in flowing fluid An apparatus and method for destructively removing particles from a flowing gas containing the particles. In the specific embodiments disclosed the apparatus is adapted to remove carbon particles from diesel engine exhaust products. The exhaust products a... | 03/15/1983 |
| 4376279 | Personal identification system A personal identification system comprises a generator which generates an Offset Number which is recorded on the magnetic stripe of a card, together with the account number (PAN) of the person to whom the card is to be issued. The generator stores transfo... | 03/08/1983 |
| 4376160 | Method of making and structure for monolithic optical circuits A method for making monolithic optical circuits, with related optical devices as required or desired, on a supporting surface (10) consists of coating the supporting surface with reflecting metal or cladding resin, spreading a layer of liquid radiation se... | 03/08/1983 |
| 4375850 | System for display and storage of cassettes A system is disclosed for retail display of a cassette in a box and for storage of a cassette at home or in an automobile using a flat plastic holder having a window and four protrusions into the window. These protrusions fit into holes in the box. A pair... | 03/08/1983 |
| 4371904 | Flexible magnetic disk system A simple flexible magnetic disk memory system is provided which enables precise positioning of a read/write head to follow a data track, despite non-uniform expansion or contraction of the disk. Several positioning sectors of the disk are formed which hav... | 02/01/1983 |
| 4370510 | Gallium arsenide single crystal solar cell structure and method of making A production method and structure for a thin-film GaAs crystal for a solar cell on a single-crystal silicon substrate (10) comprising the steps of growing a single-crystal interlayer (12) of material having a closer match in lattice and thermal expansion ... | 01/25/1983 |
| 4369359 | Apparatus and method for calculating break-even point of enterprise The break-even point of any enterprise is quickly calculated on a Cartesian coordinate system for plotting receipts versus costs by entering in the coordinate system the fixed costs, and pivoting a cursor to extend from the origin of the coordinate on rec... | 01/18/1983 |
| 4364692 | Buckle arrestor for pipe using closely spaced turns of rod to form a coil A flexible buckle arrestor (20) is provided at somewhat regular intervals (l) along the length of a pipeline (10) as it is being laid underwater for arresting the propagation of any buckle (22) that may occur in the pipeline during or after pipeline layin... | 12/21/1982 |
