Abstract: A flitch table is provided for mounting a flitch for slicing of veneer from the flitch by a knife. The flitch includes a mounting side which lies adjacent the table when the flitch is mounted to the table. The mounting side includes grooves which extend generally transversely of the direction of relative movement between the flitch and the knife during the slicing of veneer. The table includes dogs for projecting into the grooves when the flitch is mounted to the table to fix the flitch to the table for slicing of the flitch and guide rails between adjacent dogs longitudinally of the table. The guide rails also project into the grooves when the flitch is mounted to the table. The dogs have a flitch fixing position in which the flitch is fixed to the table by the dogs and a flitch releasing position in which the flitch is not fixed to the table by the dogs. A rack and pinion mechanism drives the dogs between the fixing and releasing positions.
Abstract: Disclosed is a low pressure xenon lamp and the driver circuitry therefore for producing relatively short bursts of intense light from the lamp. The lamp, including its associated driver circuitry, can be used in theatrical, stage, movie and/or video productions to simulate, among other things, bursts of lightning. The lamp is installed in a fixture together with a power supply and a control system is provided for controlling when the lamp is turned on and off. Preferably, the control system includes manually operated switches and preferably one or more controllers can be coupled together in a series fashion, should it be desired to control the lamp for a greater number of time cycles then permitted by a single controller.
Type:
Grant
Filed:
June 7, 1991
Date of Patent:
September 22, 1992
Assignee:
David A. Pringle
Inventors:
David A. Pringle, David McDonald, Zhong F. Yan
Abstract: A control system for a drying system of the type including a drying bin. Discharge particulate material moisture sensing means including a sensor assembly positioned in a discharge auger for sensing the moisture content of the particulate material. Control means is connected to the discharge particulate moisture sensing means and the discharge auger for controlling operation of the discharge auger.
Type:
Grant
Filed:
December 4, 1991
Date of Patent:
September 8, 1992
Assignee:
David Manufacturing Company
Inventors:
Keith Braun, Larry Stille, Dennis Brumwell
Abstract: My invention is a product comprised of an absorbent mixture (1) consisting of clay to absorb and contain toxic fluids which has been mixed with orange fluorescent chalk to enhance the visibility. The bright orange material becomes a warning device, alerting the public to a possible hazard. The absorbent is provided in a moisture-resistant container with means for pouring and with an opening that can be reclosed. There is a scoop (2) to clean up the waste materials, and a plastic bag (3) with lock top means for the storage and transportation of the waste materials prior to disposal.
Abstract: An acoustic transducer which can be made small in size, i.e., in width, length and thickness, so as to fit into a credit card size package. The transducer comprises a flat frame having an opening therethrough. A pair of diaphragms of a piezoelectric plastic material extend across the opening in the frame along opposite sides of the frame. The diaphragms are stretched in at least one direction and are bonded to the frame under tension in the direction of the stretch. The diaphragms are bonded together at a position within the opening in the frame. The diaphragms are coated in both surfaces with conductive metal films. The inner metal films on the diaphragms which are opposed to each other are electrically connected together and the outer metal films are electrically connected together.
Abstract: An ear seal for use with an earcup of a headset. The ear seal includes at least one ring of noise attenuating material, the material being a mixture of a dilatant silicone compound and a silicone fluid. A sheath is provided to enclose the ring of noise attenuating material. A ring of soft compliant material may also be used adjacent the ring of noise attenuating material for added comfort to the user. A sheath may be provided to enclose both the ring of soft compliant material and the ring of noise attenuating material.
Type:
Grant
Filed:
July 2, 1991
Date of Patent:
August 18, 1992
Assignee:
David Clark Company Inc.
Inventors:
Richard M. Urella, William B. Van Lennep
Abstract: The effective light incident upon pixels of an X-Y addressable imager is controlled by electrically controlling the effective photonic charging time of each pixel in each frame time of operation. The horizontal signal lines of the imager are assigned to different groups, and each group is coupled through a different one of plural vertical signal lines to a common output circuit. A multiplexer couples one vertical signal line at a time to the common output circuit. Imager array scanning logic is provided for recurrently selecting pixels of two of the horizontal signal lines at a time, but connecting only one of them to its vertical signal line at that time, for effecting variable integration by array pixels.
Abstract: An X-Y addressable imager utilizes a gate connection of a source-follower-connected MOSFET to isolate inherent capacitance of each horizontal signal line of the imager from a vertical signal line that couples the MOSFETs to a common output circuit, including a load resistor for the source followers. In one embodiment the horizontal signal lines are assigned to different groups, and each group is coupled through a different one of plural vertical signal lines to the common output circuit. At least one multiplexer couples one vertical signal line at a time to the common output circuit. Also shown is imager array scanning logic for effecting variable integration of array pixels.
Abstract: Synthetic crustacean attractant compositions useful as bait for crustaceans, especially crabs and lobsters. An attractant is sorbed on a solid carrier. The composition is in either powder form and placed in a permeable package or is formed into a conveniently shaped pellet. The composition is then placed in a trap or attached to a trot line, and the trap or trot line is submerged in an aquatic environment. The attractant which is sorbed on the surface of the solid carrier is in equilibrium with attractant in solution about the composition. The attractant in solution acts to lure the crustaceans. The controlled release process of the invention provides an amount of attractant in solution to lure crustaceans for days. The composition is simple and cost effective to manufacture, has an indefinite shelf life without refrigeration and is very easy to handle.
Abstract: A semiconductor light emitter comprising a substrate of a semiconductor material having a pair of opposed surfaces and a body of semiconductor material on one of the surfaces. The body includes a pair of clad layers of opposite conductivity types having an intermediate quantum well region therebetween. The clad layers are of a semiconductor material which forms a heterojunction with the material of the quantum well region. The clad layers and the quantum well region form a waveguide which extends along the body. A plurality of gain sections are formed in the body spaced along and optically coupled by the waveguide. Each of the gain sections is adapted to generate light therein when a voltage is placed thereacross. One of the gain section has gratings at each end thereof which are adapted to reflect light back into the one gain section and thereby create a beam of light.
Abstract: A calender bowl comprises a central elongate shaft having a flange at each end thereof. This arrangement defines a region which is filled with a filler material. The region to be filled with the filler material is the annular area around the shaft and it is filled by transversely threading numerous disc-shaped sheets of fibre and possibly conducting discs, thereon. Copper rods are disposed within the filler, along all or part of the length of the calender bowl, and lie in thermal contact with the flanges to help dissipate heat.
Abstract: A novel devitrifying glass comprising, in weight percent, from 5-15% of zinc oxide, from 10-18% of magnesium oxide; from 15-20% of calcium oxide; from 6-14% of barium oxide; from 15-20% of aluminum oxide and from 30-40% of silicon dioxide. The glasses are thermally matched to alumina substrates. The glasses form overglaze thick film inks when admixed with an organic vehicle that are useful as protective coatings for alumina substrates and multilayer printed circuits.
Abstract: A drive circuit for a liquid crystal display converts a display information signal to an n bit gray scale code to control the brightness at a prescribed pixel. A counter receives the m most significant bits of the n bit gray scale code and a latch receives the n-m least significant bits of the n bit gray scale code. The counter is decremented by clock pulses occurring at predetermined intervals and a set of 2.sup.n-m sub-interval timing signals are generated in response to each clock pulse. A transfer gate is enabled by an interval initiating pulse to permit charging of the pixel. One of the sub-interval timing signals is selected in response to the n-m least significant bits of the n bit gray scale code stored in the latch. The transfer gate is disabled by the sub-interval timing signal immediately succeeding the decrementing of the counter to its zero state.
Abstract: A computer disk sleeve comprised of a semi-rigid envelope-like body, an accordion-folded portion and an adhesive portion for attachment to a computer disk. Upon attachment of the sleeve to the computer disk, the disk and the sleeve comprise an integral package. All elements of the sleeve in conjunction provide amplified areas for printed indica or other notation. Variations in the folding methods of the accordion-folded portion provide dust protection and provide use as a mailing container.
Abstract: An illuminated skateboard is provided which comprises a riding platform with dependent wheels, a front housing and rear housing each secured to the bottom surface of the riding platform. An illumination source in each housing is operable to provide the desired illumination while riding the skateboard.
Type:
Grant
Filed:
September 4, 1990
Date of Patent:
June 2, 1992
Assignee:
David R. Ekedal
Inventors:
Michael C. Copley, David R. Ekedal, Kenneth D. Harris, Jr.