Patents Represented by Attorney F. Eugene Davis, IV
  • Patent number: 4714307
    Abstract: An apochromatic catadioptric lens is provided which can operate in the 3 to 5 and the 8 to 12 micron wavebands. The lens comprises a primary mirror having an opening and a Mangin secondary mirror for directing light of the required wavebands through the opening. In the light paths between the primary mirror and Mangin secondary mirror are a pair of refracting lens elements of optically transmissive materials different from each other and from that of the Mangin secondary mirror. Preferably, the Mangin secondary mirror is of germanium, the refracting lens element of the pair nearer the Mangin secondary mirror is of zinc sulphide and the refracting lens element of the pair further from the Mangin secondary mirror is of zinc selenide. The invention also extends to an afocal telescope of non-Galilean form incorporating such a lens.
    Type: Grant
    Filed: July 10, 1986
    Date of Patent: December 22, 1987
    Assignee: Pilkington P.E. Limited
    Inventor: John M. Palmer
  • Patent number: 4713192
    Abstract: High phosphorus polyphosphides, namely MP.sub.x, where M is an alkali metal (Li, Na, K, Rb, and Cs) or metals mimicking the bonding behavior of an alkali metal, and where x=7 to 15 or very much greater than 15 (new forms of phosphorus) are useful semiconductors in their crystalline, polycrystalline and amorphous forms (boules and films). MP.sub.15 appears to have the best properties and KP.sub.15 is the easier to synthesize. P may include other pnictides as well as other trivalent atomic species. Resistance lowering may be accomplished by doping with Ni, Fe, Cr, and other metals having occupied d or f outer electronic levels; or by incorporation of As and other pnictides. Rectifying Schottky junction devices doped with Ni and employing Ni as a back contact comprise Cu, Al, Mg, Ni, Au, Ag, and Ti as junction forming top contacts. Photovoltaic, photoresistive, and photoluminescent devices are also disclosed. All semiconductor applications appear feasible.
    Type: Grant
    Filed: December 4, 1984
    Date of Patent: December 15, 1987
    Assignee: Stauffer Chemical Company
    Inventors: Christian G. Michel, Rozalie Schachter, Mark A. Kuck, John A. Baumann, Paul M. Raccah
  • Patent number: 4711016
    Abstract: The invention relates to a flexible manufacturing unit with at least two machine tools (1,2) and a transport device (9) movable in rectangular coordinates having receptacles for carriers (8) holding workpieces and for the tools (6). The invention consists in that the transport device (9) is numerically controlled, that the tools (6) are individually transportable between a tool buffer store (29) and the machine tools (1,2) and that tool magazines (5) integrated with the machine tools are provided, which tool magazines are also accessible for tool exchange during the working period of the machine tools (1,2). In this way, a rapid method of operation is possible which is independent of the cycle and permits free selection.
    Type: Grant
    Filed: November 8, 1983
    Date of Patent: December 8, 1987
    Assignee: Werner and Kolb Werkzeugmaschinen GmbH
    Inventors: Henning Genschow, Uwe Heisel, Joachim Schuster
  • Patent number: 4711140
    Abstract: The present invention provides an improved throttle valve regulating system for automatic transmissions for motor vehicles. In such automatic transmissions, the throttle valve reciprocates in a bore as a result of the action of a plunger and a throttle valve spring to control the flow and pressure of transmission fluid or oil to effect gear shifting. The present improvement provides a rigid spacing element of predetermined length received within the throttle valve spring for urging the valve towards a full throttle position in the event that the valve sticks in the bore in a lower throttle position. The system further includes a high rate spring located in the full throttle position in the bore to prevent sticking of the valve in that position, and a low rate spring similarly positioned in the bore to counteract the force of the throttle valve spring for returning the throttle valve to a low throttle or zero position.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: December 8, 1987
    Inventor: Gilbert W. Younger
  • Patent number: 4696828
    Abstract: Pnictide thin films, particularly phosphorus, grown on III-V semiconductors, particularly InP, GaP, and GaAs, are amorphous and have a novel layer-like, puckered sheet-like local order. The thin films are typically 400 Angstroms thick and grown preferably by molecular beam deposition, although other processes such as vacuum evaporation, sputtering, chemical vapor deposition, and deposition from a liquid melt may be used. The layers are grown on the <100> <110>, and <111> surfaces of the III-V crystals. The pnictide layer reduces the density of surface states, and allows the depletion layer to be modulated, the surface barrier reduced, the electron concentration at the surface increased, and there is a decrease in the surface recombination velocity and an increase in the photoluminescence intensity.
    Type: Grant
    Filed: May 21, 1985
    Date of Patent: September 29, 1987
    Assignee: Stauffer Chemical Company
    Inventors: Rozalie Schachter, Marcello Viscogliosi, Lewis A. Bunz, Diego J. Olego, Harvey B. Serreze, Paul M. Raccah
  • Patent number: 4688902
    Abstract: A zoom lens cam mechanism has two cam follower bearings mounted on a common shaft and arranged so that they engage against and roll on opposite sides of a cam groove or slot so as to reduce backlash.
    Type: Grant
    Filed: November 19, 1985
    Date of Patent: August 25, 1987
    Assignee: Pilkington P.E. Limited
    Inventor: Allan Gardam
  • Patent number: 4679891
    Abstract: An optically athermalized infra-red lens has a group of a least three closely spaced lens elements of different respective materials having positive thermal coefficients of refractive index. Two of the elements are of materials whose refractive indices are relatively temperature insensitive, one, e.g. of zinc selenide or chalcogenide glass, being positively powered and the other, e.g. of zinc sulphide, being negatively powered to effect achromatization and correct spherical aberration. The third element is negatively powered and of a relatively temperature senitive refractive index material, e.g. germanium, of lower dispersion and higher refractive index than the other two. The lens may be the objective of an afocal telescope having an eyepiece and associated scanner and detector arrangement and may effectively athermalize the whole system.
    Type: Grant
    Filed: July 3, 1985
    Date of Patent: July 14, 1987
    Assignee: Pilkington P.E. Limited
    Inventor: Michael Roberts
  • Patent number: 4678266
    Abstract: The semiconductor layer of an opto-electronic device has one or more films of a pnictide rich material deposited thereon. The pnictide has a smaller reflective index than the semiconductor layer. These films provide a wave-guiding effect to light within the semiconductor layer in opto-electronic devices, such as solid state lasers and light emitting diodes and wave guides interconnecting such devices.
    Type: Grant
    Filed: January 28, 1985
    Date of Patent: July 7, 1987
    Assignee: Stauffer Chemical Company
    Inventor: Diego J. Olego
  • Patent number: 4676560
    Abstract: The present invention provides a circulating rack having an electric drive which can be pivoted, to a limited degree, in opposed directions dependent upon the transmitted torque of the electric drive. The drive is mounted on a pivotal rocker element which is displaced against the force of two counteracting elastically deformable abutments. A torque transmitted by the electric drive to overcome non-uniform loading of the circulating rack system causes the pivotal rocker to be displaced in either a clockwise or counterclockwise direction. A displacement measuring sensor measures the extent of pivotal movement of the rocker to provide an indication of the non-uniform loading condition so that corrective action may be taken. If the rocker is pivoted beyond a predetermined range, as for example that caused by a severe overloading condition, the displacement measuring sensor will cause the electric drive to turn off and prevent further circulation of the system until the overload has been corrected.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: June 30, 1987
    Assignee: Bellheimer Metallwerk GmbH
    Inventors: Joachim Schmitz, Franz Wagner, Adrian Siegler
  • Patent number: 4676581
    Abstract: An infra-red objective zoom lens has a fixed front positive singlet, a movable negative component, a movable positive singlet and a fixed rear component. The zoom lens can be relatively short and can be used with an "eye-piece" lens to form an infra-red afocal telescope. The system can be further shortened by using a rear group of telephoto form. The fixed front positive singlet is shaped so that at high magnification it gives undercorrected third and fifth order spherical aberration, and the moveable negative component has at least one lens element shaped so that at high magnification the negative component gives compensating overcorrected third and fifth order spherical aberration.
    Type: Grant
    Filed: April 9, 1986
    Date of Patent: June 30, 1987
    Assignee: Pilkington P.E. Limited
    Inventor: Michael Roberts
  • Patent number: 4671603
    Abstract: Lack of versatility and efficiency in optical multiplexing/demultiplexing is countered by progressing incident light along a wavelength selective holographic reflection filter which reflects different wavelengths at different positions along the filter. Light from a fibre optic input cable is directed by mirrors to make successive passes at the filter at respective different positions therealong and detectors receive the respectively reflected wavelengths. The filter preferably varies the reflected wavelength continuously and progressively as the incident light progresses along the filter.
    Type: Grant
    Filed: November 6, 1984
    Date of Patent: June 9, 1987
    Assignee: Pilkington P.E. Limited
    Inventors: James A. McQuoid, Stuart S. Duncan
  • Patent number: 4669811
    Abstract: A well defined passband for an optical reflection filter is achieved by causing light to be reflected at least twice from a holographic wavelength selective reflector. Preferably the wavelength/reflectivity characteristics differ at the two reflections to give relatively shifted, but overlapping, spectral passbands. The apparatus may comprise a fibre optic input cable which directs light at the holographic reflector and a corner cube reflector which returns the reflected light for a second reflection prior to receipt by a detector.
    Type: Grant
    Filed: November 6, 1984
    Date of Patent: June 2, 1987
    Assignee: Pilkington P.E. Limited
    Inventor: J. Allister McQuoid
  • Patent number: 4670241
    Abstract: MP.sub.15, where M is an alkali metal is used in a generator of P.sub.4 gas. KP.sub.15 is preferred. The generator is heated to produce the P.sub.4 gas. The generator may be used in various deposition processes such as chemical vapor deposition, vacuum evaporation, and molecular beam deposition. It is particularly useful in high vacuum processes below 10.sup.-3 Torr, particularly below 10.sup.-4 Torr such as vacuum evaporation and molecular beam deposition, for example vapor phase epitaxy and molecular beam epitaxy.
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: June 2, 1987
    Assignee: Stauffer Chemical Company
    Inventors: Henry S. Marek, Christian G. Michel, John A. Baumann, Mark A. Kuck
  • Patent number: 4655565
    Abstract: A contact or spectacle or implant lens has positive diffractive power which introduces negative longitudinal chromatic aberration that more than counteracts, and is preferably greater than twice, the natural positive longitudinal chromatic aberration of the eye. The residual negative longitudinal chromatic aberration enables the eye/brain system to perform tasks by concentrating on the appropriate color component at the different respective distances without need to accommodate.
    Type: Grant
    Filed: February 13, 1985
    Date of Patent: April 7, 1987
    Assignee: Pilkington P.E. Limited
    Inventor: Michael H. Freeman
  • Patent number: 4649977
    Abstract: In a tire chain, at least one junction point has a horizontal link having the form of a shackle with a main part and with outward-directed ends adjoining this. The hardness of the main part is greater than the hardness of the ends facing one another, these being joined to one another by means of a connecting part which is mushroom-shaped. The connecting part in turn has a hardened head and a hardened foot which are connected to one another via a soft shank.
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: March 17, 1987
    Assignee: RUD-Kettenfabrik Rieger & Dietz GmbH u. Co.
    Inventor: Erhard A. Weidler
  • Patent number: 4649024
    Abstract: A method and apparatus are provided for producing fine quality pnictide films by vacuum evaporation and molecular beam deposition. A pnictide source, preferably phosphorous, is heated to produce a continuous supply of vapor species, preferably P.sub.4. The vapor species is cracked by a heated tungsten wire positioned adjacent the pnictide source to produce P.sub.2 molecules. A second tungsten wire cracker is located adjacent a substrate to prevent the recombination of P.sub.2 molecules into P.sub.4 molecules. The P.sub.2 molecules are deposited on the substrate and condense into amorphous pure phosphorous shiny red films. A separate source of alkali metal intercalate, preferably KC.sub.8, may also be heated to provide an alkali metal vapor for producing films of alkali metal polypnictide films, preferably KP.sub.x where x is equal to or greater than 15, to be deposited on the substrate.
    Type: Grant
    Filed: February 17, 1984
    Date of Patent: March 10, 1987
    Assignee: Stauffer Chemical Company
    Inventors: David G. Brock, John A. Baumann
  • Patent number: 4646488
    Abstract: The present invention provides an improved rain disperser system of the type in which an assembly includes a plurality of longitudinally extending plate-like members and a plurality of transversely mounted spacer members for maintaining the plate-like members a predetermined distance apart. The assembly is mounted proximate to the edge of a roof by a suitable bracket. The spaced apart, plate-like member assembly disperses rain water flowing down a roof into fine droplets, thus avoiding the need to install roof gutters and, at the same time, preventing corrosive damage to the ground below by otherwise unimpeded run-off water. In accordance with the present invention, a new spacer element is provided for the disperser system which includes tab-like members integrally extending from the body of the spacer element for mounting the spacer elements to the plate-like members. The tabs may be inserted through openings in the plate-like members and orbitally riveted thereto.
    Type: Grant
    Filed: November 4, 1985
    Date of Patent: March 3, 1987
    Inventor: Lawrence C. Burns
  • Patent number: 4645286
    Abstract: A coupling device which allows for quickly changing electrical fixtures without rewiring. The quick change mounting fixture comprises a combined electrical and mechanical two-piece male and female fastening device. The invention allows for consumer as well as professional installation and detachment of fixtures by providing an easy and safe method. All wires and contacts are self contained and shielded from accidental contact. The invention comprises a female receptacle plate for mounting to a standard ceiling or wall mounted electrical junction box, a male tap support plate which also functions as a fixture support, a block terminal support, where contacts and wire routes are located, and a shield cover.
    Type: Grant
    Filed: February 10, 1983
    Date of Patent: February 24, 1987
    Assignee: Elliot Isban
    Inventors: Elliot Isban, Charles F. Stephenson, Robert F. Cook
  • Patent number: 4645885
    Abstract: In an endless conveyor with a plurality of load carriers, current collectors are associated with the load carriers and each exhibit an input part and a current collecting part. The current collecting part is mounted on the load carriers rotatably relative to the input part. Contact arms attached to the current collecting part are in contact with sliding contact rails. The current collected from the sliding contact rails passes via the contact arms, the current collecting part and sliding contacts connected to the current collecting part to the input part and from there to the respective load carrier.
    Type: Grant
    Filed: May 7, 1985
    Date of Patent: February 24, 1987
    Assignee: Bellheimer Metallwerk GmbH.
    Inventor: Hans R. Blesinger
  • Patent number: 4645289
    Abstract: The present invention provides an improvement to a coupling device which allows for quickly changing electrical fixtures without rewiring. The quick change mounting fixture comprises a combined electrical and mechanical two-piece male and female fastening device. A female receptacle plate is mounted to a standard ceiling or wall-mounted electrical junction box, and a male tap support plate which also functions as a fixture support may be selectively rotatably mounted to the female receptacle plate. Rotation of the male tap support plate through a predetermined angle with respect to the female receptacle plate automatically aligns respective live and neutral electrical contacts supported on the respective plates.
    Type: Grant
    Filed: July 5, 1985
    Date of Patent: February 24, 1987
    Inventor: Elliot Isban