Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 4655539 | Hologram writing apparatus and method An improved hologram writer writes a halogram from a three dimensional data stream or signal such as a signal corresponding to a scene, a picture, drawing or the like. A reference beam and an object or information beam are directed to a holographic record... | 04/07/1987 |
| 4656451 | Electronic noise suppressor An electronic noise suppressor has a U-shaped wire or other conductor passing through two stacked ferrite beads. The bead near the legs of the conductor is of high frequency impedance and the bead at the head of the U is of low frequency impedance. The le... | 04/07/1987 |
| 4646350 | Shoe with audible message A shoe has a device to provide an audible message such as a song or a word message. In one form, a shoe such as a child's shoe of the hook and loop variety has a stored audible message such as a micro circuit mounted on the shoe, or may receive an audible... | 02/24/1987 |
| 4617745 | Air shoe An air shoe has a sole having a plurality of channels longitudinally and laterally in the upper surface of the sole, forming a multiplicity of sections at least partially surrounded by such channels. This sectionalized structure improves air flow beneath ... | 10/21/1986 |
| 4563747 | Photocomposing apparatus and method Apparatus and methods for photocomposing as, for example, phototypesetting utilize photographic film on a moving member such as a rotatable cylinder with an array of multitudinous light emitting diodes movable along the length of the cylinder to project t... | 01/07/1986 |
| 4510575 | Method for writing holograms A micro graphic representation such as a hologram is formed by directing from a computer to a display surface signals to form a very small portion of the graphic representation of the display surface, focusing a micro image of the display on a recording e... | 04/09/1985 |
| 4498740 | Hologram writer and method A hologram is written from x, y, z data by presenting an information beam at a holographic medium with x and y coordinates represented by x and y position on the medium and z coordinates represented by distance between the holographic medium and a point p... | 02/12/1985 |
| 4479075 | Capacitatively coupled plasma device A capacitatively coupled plasma device has a plasma tube, an electrode positioned near the tube and means to supply a high voltage, high frequency potential such as a radio frequency to the tube to energize a flow of argon or like gas to form a plasma. A ... | 10/23/1984 |
| 4429954 | Spatial light modulator and process of modulation Coherent light such as a laser beam is spatially modulated by causing it to interact at a photosensitive material such as a crystal with a focussed image of non-coherent light. An electric potential is applied to the crystal either transversely to the dir... | 02/07/1984 |
| 4418540 | Power system and method A new power system employs aluminum as a primary fuel resulting in a total energy/volume ratio several times more favorable than gasoline. The system includes a fuel store, a reactor which may be the same mechanical element as the store and means to utili... | 12/06/1983 |
| 4416538 | Image enhancement Image enhancement is achieved to increase the ability to distinguish details otherwise difficult to discern in bright and dark areas of a photorecord by reflecting light off surface perturbations on the record and displaying the reflected light by means o... | 11/22/1983 |
| 4371608 | Resist system having increased light response A chalcogenide such as As2 S3 is coated on a substrate at a very low rate of deposition in a vacuum evaporator and is coated with a thin silver layer. The silver coated layer is exposed to illumination in a quantity insufficient to f... | 02/01/1983 |
| 4334777 | Method of monitoring motion Methods and apparatus are disclosed for studying motion of an object or element, to determine not only quantities of motion but also direction of motion. A laser beam or the like is circularly polarized and directed to two or more retroreflectors and then... | 06/15/1982 |
| 4328407 | Heating system and control An electric heating system employs a control unit including means to connect a resistance heater to a three pole power source and a switch to switch the connections between full voltage and low voltage as temperature is more than or less than several degr... | 05/04/1982 |
| 4316946 | Surface sensitized chalcogenide product and process for making and using the same Surface sensitization of a chalcogenide glass is achieved by depositing an extremely thin silver layer, for example, by depositing a silver halide and developing and fixing in the absence of exposure. The sensitized chalcogenide can then be exposed to lig... | 02/23/1982 |
| 4315501 | Solar hot water unit and system A solar hot water heating system includes a plurality of pipe assemblies, each having an outer pressure-sustaining tube and an inner perforated spiral tubing positioned at the roof of a building for which hot water is supplied. End seals close off the end... | 02/16/1982 |
| 4298254 | Device for rear view vision for spectacles A rear view vision mirror attached to a pair of spectacles.... | 11/03/1981 |
| 4292955 | Solar energy collector A solar energy collector includes a housing having a cover transparent to solar energy. A solar energy absorber is enclosed within the housing just beneath the cover. The absorber is formed to define a plurality of narrow fluid channels of triangular cros... | 10/06/1981 |
| 4269935 | Process of doping silver image in chalcogenide layer A layer of a chalcogenide glass resist material, on a substrate on which a microlithographic pattern is to be formed, has a deposit of silver halide on its outer surface. By actinic irradiation a latent silver image replicating the desired pattern is form... | 05/26/1981 |
| 4218142 | Mask analysis Masks used in the production of integrated circuits are analyzed and tested by a scanning spot from a laser beam comparing the position signal of the scan from a mask against a data base representing another mask which may be selected at random. Apparatus... | 08/19/1980 |
| 4180233 | Building construction system A building construction system uses a mold set up at a construction site so that the external part of the mold is spaced clear of the internal part. Building elements including those which are functional in the construction operation are arranged around t... | 12/25/1979 |
| 4068346 | Handle for a hand implement such as a rake, a broom, or the like This invention relates to a handle for a hand implement, such as a rake, broom or the like, which can be fixed to a socket of the implement, said handle comprising a plurality of individual tubular members formed of plastics material which can be connecte... | 01/17/1978 |
| 4059525 | Slide filters A slide filter for filtering plastic stock and other materials having a slide plate movable within a housing, across the path of material flow. The housing contains sealing means to prevent leakage of the material to the outside of the housing. The slide ... | 11/22/1977 |
| 4056094 | Solar heat collector A solar heat collector designed to obtain maximum heat from sunlight rays when operational and minimum heat from sunlight rays when non-operational. The solar heat collector contains two sheets of solid material spaced and confronting each other between w... | 11/01/1977 |
| 4056090 | Solar heat collector A solar heat collector designed to obtain maximum heat from sunlight rays when operational and minimum heat from sunlight rays when non-operational. The solar heat collector contains two sheets of solid material spaced and confronting each other between w... | 11/01/1977 |
| 4054817 | Pulse controllers A thyristor pulse controller in which current supply to each of a plurality of d.c. loads is controlled by respective main thyristors and a single commutating capacitor common to all the main thyristors is provided, the capacitor being connected across th... | 10/18/1977 |
| 4053233 | Retroreflectors A system is disclosed for detecting, locating and monitoring floating objects and other subject matter at sea on another body of water or in other location of difficult access. A floating unit contains several retroreflecting elements and is placed at a l... | 10/11/1977 |
| 4042865 | Separately excited D.C. motors A separately excited speed-controlled D.C. motor which has constant armature current and pulse-controlled field current has its armature connected by way of a bridge rectifier and an inductor to an A.C. source of substantially greater r.m.s. voltage than ... | 08/16/1977 |
| 4019987 | Extended area filters An extended-area filter for filtering plastic stock at high pressures has a breaker plate with an undulating surface confronting the oncoming stock which substantially doubles the available filter area. Screen packs having fixed therein the same surface c... | 04/26/1977 |
| 4010461 | Alerting system with dual-address memory A dual address paging receiver is described having page memory for automatically storing a page in the mode addressed if the user does not reset the receiver within a prescribed time interval after an alert signal is started. After a page is stored it can... | 03/01/1977 |
| 4004969 | Paper machine drainage foil with wear-resistant insert Drainage foils are described in two parts, a first part including the drainage surface and means for mounting the foil on a support, and the second part including the land surface and the leading edge. The second part is fitted with wear-resistant materia... | 01/25/1977 |
| 4003634 | Optical control assembly for a color design viewer An optical apparatus using a single source of white light has five independent channels each of which divides that light into three spectral components, and supplies those components individually through individual attenuators for use as a set of fifteen ... | 01/18/1977 |
| 3998301 | Method and composition for non-squeal disc brake pads A system is disclosed for removing squeal or noise from automotive disc brake assemblies. An emulsion of a normally soft polymer together with a cellulosic thickener, an anti-freeze compound, biocide and pigment is coated onto the back side of the outboar... | 12/21/1976 |
| 3974465 | Microwave device assemblies A multiport phase shifter for microwave energy provides four output components of an input wave each shifted a prescribed amount in phase, in an enclosure having two plates held together by studs mounted on one of them for locating a power divider and fou... | 08/10/1976 |
| 3968272 | Zero-bias Schottky barrier detector diodes Metal-silicide-silicon Schottky barrier diodes are made by a process which yields the characteristic of low barrier height, in the region of 0.15 volt, suitable for use without dc bias as a detector at microwave frequencies. Low barrier height metals, suc... | 07/06/1976 |
| 3965477 | Automatic graphing apparatus Apparatus for producing a graph of a function represented by a varying analogue input signal supplied to the apparatus, comprising display means adapted to display in a graphing operation the graph of the function, calculating means adapted to receive the... | 06/22/1976 |
| 3963967 | Contactor interlock circuits A thyristor pulse controller having an electromagnetically actuated shorting contactor comprising an actuating coil and an armature which moves on energization of the actuating coil to close the contactor tips and which moves on de-energization of the coi... | 06/15/1976 |
| 3963562 | Slurry distributor A headbox of the pressure nozzle type has a slurry distributor providing a plurality of pairs of separated slurry passages arrayed in the cross-machine direction. The passages of each pair open at their input ends to a manifold located at one side of the ... | 06/15/1976 |
| 3956701 | Personal paging receiver with swivel clip and distributed antenna A personal paging device is housed in a case which has one dimension (length) longer than its width or thickness, and a clip is affixed to a side on a swivel between the ends of the length dimension, which allows the device to be worn on the person in a v... | 05/11/1976 |
| 3952288 | Multifrequency linear filter networks with active elements A linear filter network incorporating active elements, and which obeys the relation ft .varies.Ýa;G1 G2, where ft is the band-pass center frequency of the network; and G1 and G2 are the ... | 04/20/1976 |
