Abstract: A dry cementitious composition which is shrinkage compensating and fast-setting for use in grouting repair of concrete surfaces. The cementitious composition comprises a hydraulic cement mixture of a major amount of a first portland cement constituent and a minor amount of a second expansive ettringite sulfoalumina cement constituent, an aggregate component, and an accelerator component. The accelerator component is a polyvalent metal salt of formic acid, specifically an alkaline earth metal formate such as calcium formate. Specific formulations include a mixture of Type I, Type IP, or Type III cement as a first constituent with Type K, Type M, or Type S cement as a second constituent, with the ratio of the first to the second constituent within the range of 2-3.

Abstract: A pulverizing apparatus including a stator and a rotor, the rotor including a plurality of concentric rows of stairstep-like movable teeth which intermesh with a plurality of concentric rows of similar stairstep-like fixed teeth on the stator. Each tooth in the rows of intermeshing teeth defines a plurality of edges which extend across the direction of movement of the movable plate, thereby defining a plurality of openings between the fixed teeth and the movable teeth which vary in size and shape as the movable teeth move relative to the fixed teeth, to break down substances introduced into the openings. The apparatus is suitable for comminuting organic waste such as food waste, as well as inorganic material such as metal ore.

Abstract: An ophthalmic surgical instrument (10) is provided for incising the anterior lens capsule of the crystalline lens of an eye. The surgical instrument (10) includes a handle (12) adapted for support in a hand of a user. A tubular member (16) extends from the handle (12) and terminates in a loop (18). A circular cutting device (20) is rotatably mounted within the loop (18). A flexible elongate wire (24) is disposed within the tubular member (16) and is interconnected to the circular cutting device (20) and the handle (12) such that the circular cutting device (20) is rotated upon compression of the handle (12).

Abstract: A vibration absorber is provided having a pendulum (12) mounted on a body (21) for oscillation about an axis (13). A pair of resilient members (14, 15) are mounted on the body (21) in contact with the pendulum (12) in preloaded opposed relation with respect to oscillation of the pendulum (12) about the axis (13) and resonant at the frequency of the vibration. A pair of resilient members (16, 17) are mounted on the body (21) to contact the pendulum (12) only upon oscillation of magnitude beyond a predetermined limit.

Abstract: A scanning system (10) for reading bar code symbols including a portable hand-held scanning device (12) is provided. The portable hand-held scanning device (12) generates electrical signals descriptive of the bar code symbols and includes a manually actuatable trigger switch (26) for initiating reading of the bar code symbols each time the manually actuatable trigger switch (26) is actuated by the user when the portable hand-held scanning device (12) is supported by the user. The scanning system (10) further includes a fixture (14) for receiving and supporting the portable hand-held scanning device (12). The fixture includes a head portion (42) and a base portion (40). The hand-held scanning device (12) is supported by the head portion (42) a predetermined distance above the base portion (40) to allow objects bearing the bar code symbols to pass between the head portion (42) and the base portion (40).

Abstract: A method of shoeing a hoofed animal is provided and includes the step of forming a mold (12) having a general configuration of a shoe for the hoof (80). The mold (12) is filled with a liquid acrylic material (64). The hoof (80) of the animal is placed within the mold (12). The acrylic material is cured utilizing ultraviolet light (50, 52), such that the liqid acrylic material solidifies and is integrally joined to the hoof (80) without any intervening adhesive or mechanical attachment. The hoof (80) is then removed from the mold (12).

Abstract: Elastomer compositions suitable for use in foaming operations and elastomeric cellular products and processes of forming such products. The elastomer compositions comprise a mixture of two thermoplastic rubber compounds, at least one of which has a vinyl aromatic component and a higher aromaticity than the other rubber compound. The compositions also contains a nucleating agent which functions when gas is entrained in the molten elastomer formulation to enhance the neutrophilic structure of the elastomer. An unstable resin is also present in the elastomer compositions. This resin is oxidized or thermally decomposed as the foamed product is cured to produce a relatively nontactified skin. Cellular elastomeric products may be formed by incorporating an inert gas into the molten elastomer compositions by the use of gas infusing equipment or by the decomposition of blowing agents. The blowing agents may be supplied to the molten elastomer compositions entrained within a plasticizing oil.

Abstract: Well stimulation involving use of a liquid explosive composition in the explosive fracturing of subterranean formations such as oil and gas bearing formations. An explosive formulation comprising a nitrate ester explosive component and a phlegmatizer component is introduced into a well penetrating the formation to be fractured. The phlegmatizer component is an alkyl or alkoxy diester which is mixable with the nitrate ester and can be varied in concentration to control the detonation velocity and maximum explosive pressure. Examples of phlegmatizing agents include alkyl or alkoxy alkyl esters of adipate or azelaic acids such as dibutoxyethyl adipate or diisobutyl azelate or polyethylene glycoxy-based diesters such as triethylene glycol dipelargonate. After the formulation is detonated to fracture the formation, the well is placed on production to recover hydrocarbons at an increased rate.

Abstract: An interlock grate structure is provided which includes longitudinal load bearing span bars having lateral locating slots spaced therealong for receiving transverse tie bars and transverse tie bars having axial locking means which engage the longitudinal span bar at the point of juncture and prevent axial displacement of the tie bar relative to the span bar. A longitudinal interlock member serves to interlock the position of the transverse tie bar locking means with respect to the longitudinal span bar and in some instances provides added structural support.

Abstract: An improved assembly of bags (70) is disclosed which forms individual bags (100) connected in a continuous assembly with a line of perforations (50) between each of the bags. The bag assembly (70) is particularly suitable for indexing before a packing machine (88) for packing the individual bags with the bags being separable by tearing each bag off the assembly at the line of perforations (50).

Abstract: A memory array unit (20) is used within a main memory (26) of a computer system (10). The memory (26) comprises a plurality of memory array units (20, 22, 24) and each of the memory array units (20, 22, 24) has an allocated address range of 0 to 16 megabytes. However, the memory array unit (20) has a capacity of only four megabytes. The usable address range is 0 to 2 megabytes and 8 to 10 megabytes. The remainder of the address range is a null. Upon development of an increased memory array unit (20) having a greater capacity, such as 16 megabytes, the new memory array unit (20) is directly substituted for the previous low capacity memory array unit. The new memory array unit (20) has a fully implemented address range from 0 to 16 megabytes. The low and high capacity memory array units can be intermixed or the low capacity units can be entirely replaced by the high capacity units without the need for modifying any of the computer system (10) or for modifying the system software.

Abstract: A method for etching thin films of compostions from the PLZT family which have been deposited on substrates. The film is coated with a photosensitive material which is developed by photolithographic techniques to form a photoresist mask upon the film layer, the photoresist material having a predetermined pattern. The thin film coated substrate with the developed photoresist mask is immersed in a dilute etching solution containing hydrochloric acid and fluorine ion donor for a period of time sufficient to etch that portion of the thin film layer not covered with the developed photoresist, removing the thin film coated substrate after it has been etched, rinsing the substrate and then immersing the substrate in a second etching solution containing a dilute solution of a lead solubilizing medium such as nitric acid, or acetic for a period of time sufficient to remove lead residue remaining from the first etching step.

Abstract: An apparatus for brewing coffee comprising an inlet and outlet valve attached to a conduit for flowing water, a pump means interposed between said valves. A heating element comprising a coil and a burner plate. Connected to the outlet valve is a reducing nipple and water distributor.

Abstract: An advanced latching circuit (14) is used for latching a compressor (16) to a power source (18). The circuit includes the solenoid (32) of a compressor relay. A first set of contacts (28) of the compressor relay, a capacitor (34) and a resistor (36) are connected in parallel with each other and in series with the solenoid (32). Power supplied to the latching circuit (14) with the capacitor discharged energizes the solenoid (32) and latches the circuit. The opening of the latching circuit (14) by a safety switch (38, 40) deenergizes the solenoid to disconnect the compressor from its power source and charges the capacitor (34). The solenoid cannot be reenergized to reactivate the compressor until service personnel remedy the heat pump malfunction and interrupt power to the latching circuit (14).

Abstract: An improved remote braking system (10, 100) is provided which allows simultaneous actuation of the braking system of a motor home (12) and an automobile (14) towed behind the motor home. An advantage of the present invention is the incorporation of the system within the self-contained hydraulic brake system of the automobile, which permits the braking system of the automobile to be operated in the normal manner. The system includes an actuator (26, 102) which is secured between the vacuum booster (18) and the master cylinder (20) of the automobile. Within the actuator is a piston (38, 114) which separates the interior of the actuator into two chambers. A pressure differential is created between the chambers when the brakes of the motor home are applied to generate a force on the piston (38, 114), to apply the brakes of the towed automobile as well. The system is operable with either air brakes or hydraulic brakes in the motor home.

Abstract: An image processor (10) for use with an image sensor (12) is provided. The image sensor includes two output channels (14, 16) for producing video signals in the form of a clock signal carrier which is amplitude modulated by picture element signal levels sensed by the image sensor (12). A first filter (22) is connected to the image sensor (12) for removing the clock signal from the video signals produced by the image sensor which are produced on the first channel (14). A second filter (26) is connected to the image sensor (12) for receiving video signals from the second channel (16) for removing the clock signal from the video signals produced by the image sensor (12) produced on the second channel (16). The filtered video signals are combined in a multiplexer (40) to produce a single video signal.

Abstract: A tubular surgical device (10) is provided for insertion into a cavity of a living body. The device (10) includes an elongated substantially hollow cylindrical tubular flexible conduit (12) having an exterior surface (14) for contact with the tissue of the cavity. The external surface (14) is coated with a hydrophilic material and is impregnated with an infection preventing material for absorption by the tissue of the cavity. The conduit (12) includes a bore (20) which is defined by an annular wall (22). The annular wall includes a plurality of axially spaced alternating annular ridges (24) and grooves (26) to render the conduit (12) flexible. A delivery system (42, 44, 46) is provided for the tubular surgical device (10) for supplying, replenishing, and delivering antibiotics and germicides to conduit (12) for absorption by the cavity tissue.

Abstract: An improved clip for holding an explosive shaped charge in a carrier strip is provided. The improved clip holds the shaped charge by inserting fingers into an annular groove formed around the perimeter near one end of the shaped charge. The clip and charge are in turn inserted into a carrier strip and held in place by notches cut into the clip. The carrier and its shaped charges are then inserted into a perforating gun tube. The carrier strip is held in position within the tube by use of spring-loaded lock pins. The lock pins are mounted on the strip so that a spring will force the pins inwardly away from the inner wall. A separate threaded screw with a cam surface is engaged to hold the lock pins in their outward position thus firmly securing the carrier strip in place.

Abstract: An image processing system (10) for displaying a video image of a document includes structure for scanning (12) the document and for generating (24) pixel signals representing gray level data values of the image of the document. Circuitry (80) generates a set of color data values and assigns one of the color data values to pixels having a predetermined gray level data value. Structure (42, 84) displays the pixels having an assigned color data value and generates a color image of the document.