Patents Represented by Law Firm Kenway & Jenney
  • Patent number: 4599727
    Abstract: A solid state laser whose medium is a strontium aluminum fluoride crystal doped with chromium. This laser medium has a wavelength tuning range centered around 850 nm and the laser gain is estimated to be a factor of 2-3 times higher than that of emerald and alexandrite lasers at room temperature.
    Type: Grant
    Filed: October 26, 1984
    Date of Patent: July 8, 1986
    Assignee: Massachusetts Institute of Technology
    Inventor: Hans P. Jenssen
  • Patent number: 4597351
    Abstract: An accumulator particularly adapted for mooring instruments in an ocean environment. The accumulator includes a solid rubber core surrounded by a nylon overbraid. The nylon overbraid is seized by means of high tensile strength tape to the rubber core at intervals along its length. The ends of the accumulator are terminated in loops surrounding steel thimbles. The loops are formed by standard braid splicing techniques. The accumulator is capable of elongation to three times its relaxed length and has an ultimate breaking strength in excess of 15,000 lbs.
    Type: Grant
    Filed: June 24, 1983
    Date of Patent: July 1, 1986
    Assignee: ENDECO-Environmental Devices Corp.
    Inventor: Edward C. Brainard, II
  • Patent number: 4597123
    Abstract: The tool includes an elongate handle one end of which tapers into a wedge shape useful for prying. The other end of the elongate handle includes an arcuate portion with inwardly angled projections creating a spanner wrench for use with hose couplings. One side of the arcuate portion includes a cylindrical member with a flat face suited for a hammering operation. The other end of the arcuate portion includes claw members diverging from a narrow portion proximal the arcuate member and cooperates with the arcuate member in a prying operation. A pin member extends in a plane perpendicular to the plane formed by the elongate handle and the arcuate member and is located for use in removing hinge pins from doors.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: July 1, 1986
    Inventor: Walter T. Cobe, Jr.
  • Patent number: 4597715
    Abstract: A wooden wind turbine blade is formed by laminating wood veneer in a compression mold having the exact curvature needed for one side of the blade, following which the other side of the blade is ground flat along its length but twisted with respect to the blade axis.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: July 1, 1986
    Assignee: North Wind Power Company, Inc.
    Inventor: Clint Coleman
  • Patent number: 4595834
    Abstract: An imaging proportional counter which significantly reduces parallax errors when imaging point sources of radiation located at variable distances from the detector entrance window. The imaging proportional counter includes a gas filled enclosure with a concave shallowly curved radiation permeable entrance window allowing radiation from the source to enter the enclosure. A multi-wire grid assembly is spaced behind the entrance window within the enclosure. When a potential difference is applied between the grid assembly and concave entrance window an electrostatic field is generated such that near the interior surface of the window the field lines form a spherically focussed region. The concave entrance window also allows increased fill gas pressures such that radiation entering the detector will interact with the fill gas very near the entrance window while still in the spherically focussed region.
    Type: Grant
    Filed: May 23, 1984
    Date of Patent: June 17, 1986
    Inventor: Ronald E. Burns
  • Patent number: 4594318
    Abstract: A process of isolating and identifying cloned DNA segments from defined regions of a chromosome by preparing a series of cell hybrids from a first species and a second species, which hybrids contain a chromosome or deletion mutant of a chromosome as the oThe Government has rights in this invention pursuant to Contract Number CA-5-14051 awarded by the Department of Health and Human Services, Contract Number PCM 77-17747 awarded by the National Science Foundation, and Contract Number 1-713 awarded by the National Foundation-March of Dimes.
    Type: Grant
    Filed: June 17, 1982
    Date of Patent: June 10, 1986
    Assignee: Massachusetts Institute of Technology
    Inventors: James F. Gusella, David Housman, Cheryl Keys, Aviva Varsanyi-Breiner, Theodore T. Puck, Carol Jones, Fa-Ten Kao
  • Patent number: 4593470
    Abstract: A three dimensional graphics tablet for determining the three dimensional coordinates of points on an object placed on a supporting plane. The apparatus includes an articulated arm having at least two link elements connecting a contacting tip element to the support for rotational movement about a plurality of mutually angulated axes. By means of the arm articulation, the contacting tip element can be moved to arbitrary locations within a defined volume. Potentiometers are provided for measuring each of the angles of rotation about the mutually angulated axes. These potentiometers generate signals which collectively determine the coordinates of the location of the tip element. Embodiments are disclosed having three and four degrees of freedom and a portable embodiment including a clamp or bracket are disclosed.
    Type: Grant
    Filed: August 13, 1984
    Date of Patent: June 10, 1986
    Assignee: Micro Control Systems, Inc.
    Inventor: David L. Davies
  • Patent number: 4591858
    Abstract: Preprogrammed aircraft target information is stored in separate lists of beacon and radar target words each including azimuth, range and amplitude data for a designated target within the current one of a plurality of predetermined azimuth "half" sectors. For each radar target word whose starting and ending azimuth includes the current azimuth, its amplitude data is loaded into the range bin of one of a first pair of high speed RAM data stacks addressed by the range data of the target word. When the radar trigger occurs, the previously loaded data stack is read out sequentially bin-by-bin. An echo pulse is formed by a video data output control for each range bin containing a non-zero value. For a beacon target of valid azimuth, the amplitude data is loaded into the range bin of one of a second pair of data stacks addressed by the range data of the beacon target word. The same amplitude data is loaded into every eighth range bin for which the corresponding bit of the transponder 3/A or C code is a "1".
    Type: Grant
    Filed: December 3, 1982
    Date of Patent: May 27, 1986
    Assignee: The Mitre Corporation
    Inventor: Stephen R. Jacobson
  • Patent number: 4586533
    Abstract: A pilot operated pressure relief valve system having a modulating action. The pilot valve is of the non-flowing type and comprises sleeve and control stem members translating within a channel. The sleeve member comprises an exhaust valve for relieving dome pressure on the relief valve when lifted by the control stem. The control stem translates in response to system pressure changes and comprises an inlet valve cooperating with a seat on the sleeve member to form an inlet valve closable to isolate the dome from the system pressure when the latter reaches a level predetermined in relation to a set pressure.
    Type: Grant
    Filed: July 1, 1985
    Date of Patent: May 6, 1986
    Assignee: Crosby Valve & Gage Company
    Inventor: Robert F. Estes
  • Patent number: 4586260
    Abstract: A scale and slider in a linear displacement measuring instrument have spaced opposed parallel surfaces bearing aligned patterns of thin flat conductive elements. The scale pattern consists of equally spaced parallel bars transverse to displacement with enlarged aligned central portions which form collectively a single set of coupling electrodes. A pair of aligned sensor electrodes are fixed on the surface of the slider opposite the coupling electrodes of the scale and matching arrays of transmitter elements are arranged on opposite sides of the sensor electrodes and grouped axially in space quadrature. Alternate interdigitated sets of the transmitter electrodes on the slider are excited with oppositely phased square wave signals. The signals picked up by the sensor electrodes on the slider are fed to separate coarse plate counting and fine plate interpolation circuits.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: May 6, 1986
    Assignee: The L. S. Starrett Company
    Inventors: Larry K. Baxter, Robert J. Buehler
  • Patent number: 4586774
    Abstract: A field-attachable electrical connector splices the conductors of two armored cables without hand soldering. The connector has a rigid hollow housing with axial passages at both ends that receive and locate the cables. Insulating end supports locate and seal the conductors projecting from the outer armor jacket. A sealing connector, also formed of an insulating material, bridges the end supports and surrounds the stripped ends of the conductors of both cables and a pin contact secured on each conductor's end. A locking contact socket member with two axially oriented oppositely directed sockets is secured in a passage of the seal connector between a pair of the stripped ends. A spring clip carried on the pin contact mates with a recess in the socket connector to secure each pin contact in a reliable electrical connection within an associated socket. Each socket connector has a gas impermeable wall between its two sockets.
    Type: Grant
    Filed: April 23, 1984
    Date of Patent: May 6, 1986
    Assignee: BIW Cable Systems, Inc.
    Inventor: Robert G. Didier
  • Patent number: 4585490
    Abstract: An integrated circuit device including a link point for electrically connecting a plurality of metal layers, comprising a first metal layer, a link insulating layer, a second metal layer and diffusion barrier layers between the link insulator layer and each of the first metal layer and the second metal layer. The metal layers are connected by exposing the link point to a low-power laser for a relatively long pulse width.
    Type: Grant
    Filed: October 3, 1984
    Date of Patent: April 29, 1986
    Assignee: Massachusetts Institute of Technology
    Inventors: Jack I. Raffel, John A. Yasaitis, Glenn H. Chapman, Mark L. Naiman
  • Patent number: 4583582
    Abstract: A system for transferring heat from a first (inner) surface through a second (outer) surface. The system includes at least two adjacent porous and thermally conductive layers between the first surface and the second surface. The innermost layer is characterized by a relatively high porosity and the outermost layer is characterized by a relatively low porosity. The innermost layer houses a fluid coolant. The pores of the innermost and outermost layers are coupled, permitting coolant flow therebetween. A vapor chamber is positioned between the outer surface and an outer member. A controller is adapted to control the vapor pressure in the vapor chamber whereby the coolant has a liquid vapor phase transition in the outermost layer.
    Type: Grant
    Filed: August 2, 1984
    Date of Patent: April 22, 1986
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventor: Arthur Grossman
  • Patent number: 4582044
    Abstract: Exterior retrofit system for attachment to wood or coal-burning stoves including a secondary combustion chamber and a catalytic igniter. The secondary combustion chamber is lined with refractory material and is arranged to preheat flue gases emanating from the woodburning apparatus before ignition at the catalytic igniter. The refractory walls have an undulating structure to increase mixing and residence times for more complete burning. Provisions are made for introducing additional combustion air into the secondary combustion chamber. Combustion performance is improved resulting in reduction of cresote deposits and particulate emissions and reduction in the amount of fuel consumed for a given heat output. The retrofit unit is self-contained and requires no permanent or complicated modification to the stove. This system also has application for use on the interior of a stove, both as a retrofit and as the basis for a specifically designed stove.
    Type: Grant
    Filed: January 19, 1984
    Date of Patent: April 15, 1986
    Assignee: Vermont Castings, Inc.
    Inventors: Robert W. Ferguson, Derik K. Andors, William W. Crossman, Jr.
  • Patent number: 4577512
    Abstract: The thread-tension meter has a housing (1) which is divided into a reading head (2) and a remaining housing part (3). The reading head (2) can be pivoted 90.degree. relative to the remaining housing part (3), as required, so that it is possible to read off the thread tension easily in any position of the thread.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: March 25, 1986
    Assignee: N. Zivy & Cie, S.A.
    Inventor: Konrad Lowenheck
  • Patent number: 4575291
    Abstract: The subject matter of the present invention is a dividing apparatus or indexing attachment for a program controlled machine tool, comprising a housing (1) including clamping means (3, 4) for attachment to a machine part, a dividing spindle (5) mounted within the housing (1) and including a work holder (8, 9) and a clamping assembly (15), and a spindle drive means including a reduction gearing, in which for achieving fully automatic sequences of operation in the manufacture of various workpieces, an opto-electronic angle measuring unit (24) and a releasable clamping means (31 to 36) are associated with the dividing spindle (5), wherein the reduction gearing includes two cylindrical gears (29, 30) having parallel axes and jointly meshing with a pinion (27) mounted on the motor shaft and further includes two pinions (46, 47) mounted on the intermediate shafts (40, 41) of said cylindrical gears, the two latter pinions meshing with the spindle drive gear (10).
    Type: Grant
    Filed: April 22, 1982
    Date of Patent: March 11, 1986
    Assignee: Maho Werkzeugmaschinenbau Babel & Co.
    Inventor: Werner Babel
  • Patent number: 4572237
    Abstract: A dual bellows apparatus for controlled, programmed application of forces to an extension of the spindle of a spring loaded safety relief valve. A controller which may be remote from the valve is adapted to perform a plurality of functions on the valve while installed in an operating system by pressurization of the respective bellows. These functions include force-assisted opening of the valve, force-assisted blowdown, anti-simmer control and measurement of the set pressure.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: February 25, 1986
    Assignee: Value Oriented Technology Inc.
    Inventor: Leonard J. Thompson
  • Patent number: D283395
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: April 15, 1986
    Assignee: Swish Products Limited
    Inventors: Terence A. Cox, Paul M. Johnson, Philip C. Horton
  • Patent number: D283788
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: May 13, 1986
    Assignee: Swish Products Limited
    Inventors: Terence A. Cox, Paul M. Johnson, Philip C. Horton
  • Patent number: D284448
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: July 1, 1986
    Assignee: Swish Products Limited
    Inventors: Terence A. Cox, Paul M. Johnson, Philip C. Horton