Abstract: In an improved circuit module with a flat chip-carrying substrate and cylindrical pistons that contact the chips for cooling, each piston has an axial bore that carries a dielectric liquid to the chip and the lower face of the piston (facing the chip) is spaced away from the chip to establish radial channels that carry the liquid across the surface of the chip. The face of the piston, as seen in a section through the axis, is shaped to provide a selected flow pattern across the surface of the chip. The piston face reduces the channel height in the direction of flow where the liquid is non-boiling and thereby offsets the tendency for the flow rate to decrease as the circumferential width of the channel widens. The piston face increases the channel height in the direction of flow where the liquid is boiling to handle the increase in volume caused by the vapor.

Abstract: Polyurethane compositions comprising isocyanate cured specific equivalent weight hydroxyl bearing components used as potting compounds or sealants for hollow fiber or folded membrane biomedical separatory devices, especially when such devices contain containments such as glycerine or water.

Abstract: A process for making compacted particulate polyolefin compositions is described. The process includes the steps of:(a) thoroughly mixing a molten blend of a polyolefin and a modifying agent;(b) cooling the blend to a temperature below the melting temperature of the polyolefin, while masticating the blend; and(c) continuing to masticate the blend and subsequently extruding the blend below its melting temperature to produce strands or pellets in crumble form.The modifying agent may be solid or liquid at S.T.P. and should be mobile at processing temperatures. Examples of modifying agents include polyalkylene glycols, polyisobutylene. A preferred polyolefin is polyethylene. It is preferable that the process take place in a twin-screw extruder.

Abstract: Polyurethane compositions having improved adhesion comprising amine containing isocyante cured polyols of liquid esters of carboxylic acids having at least 8 carbon atoms for use as potting compounds or sealants for hollow fiber or folded membrane biomedical separatory devices, especially when such device contain contaminants such as glycerine or water.

Abstract: A door lock including a housing, a bolt assembly, a lock mechanism engaged with the bolt assembly and capable of being operated to move the bolt assembly from a locked to an unlocked position, and vice versa. The door lock includes a first switch secured to the housing and in the moving path of the bolt assembly, and adapted to couple with an alarm apparatus, for turning on the alarm apparatus when the bolt assembly is moved to the locked position, and for turning off the alarm apparatus when the bolt assembly is moved to the unlocked position.

Abstract: Chlorine-resistant semipermeable membranes which comprise an interfacial polymerized reaction product composite on a porous support backing material may be prepared by contacting a porous support material such as polysulfone with an aqueous solution of an aromatic polyamine, said aqueous solution containing a polyhydric compound and an acid acceptor. The coated support material is then contacted with an organic solvent solution of an aromatic polycarboxylic acid halide for a period of time sufficient to form an interfacial polymerized reaction product on the surface of the support material. The resulting composite is then post treated by washing with an alkaline compound, leaching with sodium bisulfite and treating the leached composite with a polyhydric compound. The resultant membrane composite may be used in separation processes such as the desalination of brackish or sea water, trhe membrane being resistant to attack by chlorine which is present in the water.

Abstract: A bamboo board comprising a number of longitudinal layers (4) and a number of lateral layers (5). The longitudinal layer is made by longitudinal bamboo strips (1) bonded together with adhesives (3), and the lateral layer is made by lateral bamboo strips (2) bonded together with adhesives (3). During assembly, the longitudinal layers and lateral layers are laid over alternately, with strips of each layer at right angles to those of adjacent layers, and bonded by adhesives (3) in between to become said bamboo board.

Abstract: A frame fixture for use with a source of spray paint for camouflage painting of vehicles. A frame is formed in a shape corresponding generally to the shape of a portion of a vehicle to be painted. A plurality of strips connected to the frame divides an area inside the frame into a plurality of areas corresponding to areas to be painted on the vehicle. The strips can be mounted a predetermined distance from the vehicle to allow paint to spray into an area between the strips and the vehicle.

Abstract: An electrical plug comprises a body (1) molded with prongs (2) and detachably secured with a cover (10). Each of the prongs is detachably connected to an electrical wire (11) by means of tying a loop (13) at the bare end of said wire, and slipping said loop into a spring clamp (3) formed on the prong. The connection of said wire to said prongs is made before attachment of said cover.

Abstract: An improved TCM-like circuit module for cooling an array of chips mounted on a substrate. The substrate and the chips are enclosed by components that include a barrier plate that separates the chip space from a coolant such as air or chilled water. A floating plate contacts a heat transfer surface of each chip and forms a local heat sink. Pins conduct heat from the floating plate. In one embodiment, one end of each pin is rigidly attached to the floating plate and the other end is located in a cavity in the barrier plate. In a second embodiment, the cavities are formed in the floating plate and the barrier plate rigidly supports the pins. In the second embodiment, the pins can be extended through the barrier plate to contact the coolant directly.

Abstract: Heat producing components such as semiconductor chips are arranged with a major heat transfer surface at an angle of about 10 degrees to the vertical. A film of a dielectric liquid flows downward across this surface from a catch pan located above the component. The film evaporates and thereby removes heat from the component and the vapor is condensed and returned to the catch pan. The angle of the heat transfer surface helps to prevent separation of the film as it flows downward across the surface. In one embodiment the slanting surface is formed by slanted grooves in an otherwise vertical surface of a semiconductor chip. In other embodiments, a slanting surface or a vertical surface with slanting grooves is formed in place on the chip or is formed separately and attached to the chip or is formed as part of a local enclosure for the chip.

Abstract: An organic photochromic composition comprising spiro [indoline-2,3'-[3H]-naphth [2,1-b] [1,4] oxazine] dye (spirooxazine dye) and unconventional ultraviolet stabilizers. The ultraviolet stabilizers improve the light fatigue resistance of the spirooxazine (S.O.) dye and will not hinder the photocolorability of the photochromic composition. The unconventional ultraviolet stabilizers belong to the class of hindered amine light stabilizers (HALS) and excited state quenchers.

Abstract: A metal foil for use as a heat transfer element has through holes formed as a narrow entrance opening to one surface and a wider diameter cavity opening to the other surface. Two foils are laminated with the narrow entrances opening to the outside and with the wider cavities closed by the inside surface of the other foil. In the completed structure the cavities and their entrances form nucleate boiling sites. In a manufacturing step of forming the through holes, the junction between the narrow entrance and the wider diameter cavity is shaped to prevent a heat transfer liquid from flooding the cavities. The structure is particularly useful for fins for cooling circuit devices that are immersed in a dielectric liquid. In one heat transfer structure, the fins are formed by laminating two metal foils that have differing coefficients of thermal expansion. The fins spread apart as their temperature increases, and components are cooled in proportion to the heat they produce.

Abstract: The organic photochromic composition of this invention comprises trifluoromethyl substituted spiro (indoline-2,3'-(3H) napth-(2,1-b)(1,4)oxazine) (SO) dyes. This new class of (SO) photochromic compounds has a more neutral color when subjected to ultraviolet light irradiation.When used with a photochromic plastic embodiment, these (SO) compounds give the plastic embodiment a high luminous transmittance in an unactivated state, which can be darkened significantly when subjected to ultraviolet light irradiation. When an ultraviolet stabilizer is used with the photochromic compositions of this invention, the light fatigue resistance of the (SO) dye is improved and it will not hinder the photocolorability of the photochromic composition.

Abstract: An animal trap with rotative tangential doors comprises a main body (1) of open tubing pivoted with rotative tangential doors (2) which are positioned at each of said main body's two openings. Each door is controlled by a latch (4) located at the top of the tubing. At the middle of the body a trigger (3) is suspended by a clamp which is made by hooking both latches with a spring (6). When an animal steps on the lower rim of the trigger, its weight will cause the trigger to drop, thus causing movement of both latches and the simultaneous closing of both doors. The trap is provided with a pair of instant door locks (5) which would prevent the reverse rotation of each of the doors.

Abstract: Heat conducting pins are mounted on a base to be cooled and carry heat conducting wings that extend oppositely in the upstream and downstream direction of the flow of a coolant across the base. The wings are generally trapezoidal in shape, and they produce a greater drag on the coolant flow along the longer edge of the trapezoid shape than along the shorter edge. The pins along a column of coolant flow are oriented with the shorter parallel edges of the wings alternately at the base or at the top of the pin. The alternating regions of high drag and low drag produce an up-down motion in the coolant flow that improves heat transfer.

Abstract: A vehicle visor includes a frame member having a mirror mounted thereto and a flexible cover for the mirror. A guide and support structure is mounted to the frame for guidably supporting the flexible cover to permit movement of the cover between a position covering the mirror and a position exposing the mirror for use.

Abstract: A time interval measuring apparatus is provided for measuring the time interval between two signals. The two signals are successively brought to synchronization by delaying one of the two signals as they pass through a series of time shift cells connected in tandem. These delays are accumulated in a register, and the total net delay which is required to bring the two signals into synchronization is indicative of the time interval between the two signals. This indication of the time interval between the two signals thus forms the time interval measurement thereof. It can be refined by increasing the number of time shift cells in tandem and using progressively finer delays.

Abstract: A housing defines a compartment with an opening for receiving a garage door opening transmitter with an actuator switch. A door is pivotally coupled to the housing for covering the opening and includes an actuator for engaging the actuator switch on the garage door opening transmitter when the door is closed and depressed inwardly toward the interior of the compartment.