Abstract: Propellant grain consisting essentially of:A. from about 50% to about 75% by weight of an oxidizer consisting essentially of ammonium nitrate;B. from about 1% to about 20% by weight of a cured polymeric binder;C. from 0% to about 30% by weight of a nitrate ester plasticizer;D. from about 3.5% to about 8% by weight of boron in free elemental form; andE. from 0% to about 3% by weight of aluminum metal.The grain has a pressure exponent not exceeding about 0.30 at a combustion pressure between about 2500 and about 7000 pounds per square inch (between about 1700 and about 4800 N/cm.sup.2). Also, an uncured pourable slurry having the formula stated above, except that the binder is uncured. Also, a method for forming a propellant grain having the formula stated above, comprising the steps of providing the uncured pourable slurry defined above, pouring the slurry into a casing, and curing the slurry in situ to form a cured propellant grain having a pressure exponent not exceeding about 0.

Abstract: A symmetrical 180.degree. microwave hybrid is constructed by opening a slot line in a ground plane below a conducting strip disposed on a dielectric substrate, creating a slot coupled conductor. Difference signals propagating on the slot coupled conductor are isolated on the slot line leaving sum signals to propagate on the microstrip. The difference signal is coupled from the slot line onto a second microstrip line for transmission to a desired location. The microstrip branches in a symmetrical fashion to provide the input/output ports of the 180.degree. hybrid. The symmetry of the device provides for balance and isolation between sum and difference signals, and provides an advantageous balance between the power handling capabilities and the bandwidth of the device.

Abstract: A mechanically pressurized electronic fuel injector is for use in internal combustion engines and is actuated by the engine valve train. The fuel injector has an injection stroke for discharging fuel into the engine and a metering stroke for receiving a predetermined volume of fuel in the injector. During the injection stroke, a coupling member contacts a timing plunger and transmits a compressive force from the engine valve train. The coupling member and the timing plunger are not mechanically connected together and are capable of independent relative movement. During the metering stroke of the injector, the timing plunger is returned to its pre-injection position under the pressure generated by the fuel entering the timing and metering plunger chambers.

Abstract: A pellet burning appliance with an improved burner is disclosed. This improved burner includes an open ended retort in communication with a feed auger at the inlet end opposite the open end. The feed auger delivers solid fuel pellets through the inlet end which results in underfeeding action and cross-flow of the combustion bed. An air hole arrangement introduces primary and secondary air for highly efficient burning. The floor of the retort is flat, and colinear with the bottom of the auger tube. The burner is inclined within the appliance at approximately 22.5.degree. from the horizontal. This design promotes efficient burning as the constantly fed fuel spreads evenly whereby it combusts over substantially the entire length of the retort. The feeding action continually pushes clinkers and other combustion inhibiting particulates, in an unobstructed manner, off the retort's terminal end.

Abstract: In an exemplary embodiment, a test signal is sent by a base station at a suitable point in a communications protocol. According to the evaluation of the test signal transmission, a relatively high data rate or a lower more conservative data rate is selected by a mobile unit for the transmission of a relatively lengthy data message. The test signal can be associated with a query from a mobile unit having a message to send, or with a contention polling message from the base. Such test signal can be transmitted at the lower data rate where its transmission characteristics (e.g. signal strength, jitter or quality of transmission of known information) can be used to predict probable feasibility of transmission at the higher data rate, but most preferably the test signal is part of a high data rate contention poll which may alternate with a low data rate contention poll.

Abstract: A panel interlock system for connecting a plurality of wall panels together is disclosed. A locking clip is attached to the vertical edges of each wall panel. A vertical filler tube is used to connect adjacent wall panels together. The vertical filler tube is disposed between wall panels and slid down over locking clips which engage inner grooves extending through the length of the vertical filler tube. The vertical filler tube engages the locking clips in a concealed cam-action fastening technique.

Abstract: A mechanically pressurized electronic fuel injector for use in internal combustion engines is actuated by the engine valve train during the injection stroke. A control solenoid is mounted to the injector and has its axis inclined with respect to the axis of the injector. A control valve passage has its axis generally coaxial with the central axis of the control solenoid. Machining of the control valve passage is accomplished through the receiving boss for the control solenoid. High pressure sealing plugs, previously required to seal orifices in the exterior surface of the injector body which were needed to provide access to drill or machine the control valve passage, are completely eliminated. The drilling and machining of the control valve passage is accomplished without drilling through the exterior surface of the injector body.

Abstract: An instrument for measuring and converting scale dimensions such as, for example, mileage values on a map, includes a housing having a tracing wheel at one end for rolling along route lines on the map. The tracing wheel is connected to operate an actuator that causes a digital display to visually indicate a value representative of the degrees of rotation of the tracing wheel, and thus of the mileage between two points on a map. A scale adjusting device is connected with the actuator to adjust the actuator to obtain an accurate mileage indication for different scale maps.

Abstract: In order to improve a spindle drive for machine tools, comprising a housing, a spindle mounted in the housing, a drive motor arranged on the housing and a gear arranged in the housing and comprising an intermediate shaft driven by the drive motor and mounted in the housing via two shaft bearings spaced from one another as well as a first gear wheel seated on the intermediate shaft, wherein for driving the spindle as C-axis the first gear wheel engages in a first position with a second gear wheel driving the spindle so as to mesh with the second gear wheel without clearance, such that it is more simple in construction it is suggested that the first shaft bearing fix the intermediate shaft immovably on the housing in a direction transverse to its axis and that the intermediate shaft be adapted to be moved back and forth by the second shaft bearing relative to the second gear wheel in an adjusting direction between the first position and a second position, the gear wheels meshing with one another in the second p

Abstract: The present invention relates to an apparatus for injecting viscous materials. The apparatus includes a vertically adjustable manifold valve which receives a continuously circulating supply of pressurized viscous material. The manifold valve is positioned above a container or mold cavity to be filled with the viscous material. When the manifold valve is opened, the viscous material is injected into the containers or molds.

Abstract: In its broad aspect, the present invention involves a governor-controlled gas compressor system for maintaining gas pressure in a gas reservoir between a predetermined first pressure level at which said compressor commences to compress pressurized intake gas from a supercharged source thereof and a predetermined higher second pressure level at which the compressor ceases to compress said gas. The system includes a gas dryer vessel intermediate said compressor and said reservoir to effect drying of the compressed gas. The gas dryer is provided with means for exhausting purge gas therefrom only when the pressure of the purge gas exceeds the pressure of the pressurized intake gas from the supercharged source thereof.

Abstract: A matching system for use with an inserting device adapted to insert into an envelope, which may be personalized for a particular recipient, one or more personalized inserts. The matching system ensures the proper assembly of mass mail items which include personalized components, each having an alpha-numeric sequence indicator printed thereon which corresponds to a given recipient. The matching system includes a number of video cameras, each positioned to sense an alpha-numeric sequence indicator on a different component of a mail item being assembled. The video camera create electrical signals in accordance with the sensed indicators which are processed by circuitry to develop and store digital representations of the sensed indicators. A controller, consisting of a master processing unit and a number of slave processing units, receives the stored digital representations and determines from them whether the sequence indicators on the personalized components to be assembled into a mass mail item match.

Abstract: In face-protecting devices such as welder's shields and helments, a filter plate is supported on a support ledge adjacent the view port and is retained on the exterior of the device by a filter plate retainer adapted for attachment to the device.

Abstract: A tool apparatus for applying a large closing force to an object is disclosed. The tool apparatus, capable of improving the efficiency and ease of effort required to crimp nuts onto bolts and to cut materials such as multi-strand cables, bars and the like, comprises first and second jaws, each having first and second portions. Each first portion has a linking end. A mechanism is provided for interconnecting the first and second jaws, and for providing a pivoting point for each of the first and second jaws. A hydraulic cylinder drives a rod linearly along a drive axis from a first position to a second position with a drive force.

Abstract: The solid marking composition of the invention includes from about 15% up to about 50% by weight of a polyethylene resin component having a specific gravity in the range of from about 0.95 up to about 0.96. In addition, the composition of the invention includes from about 20% up to about 55% by weight of a compatible plasticizer, and from about 3% up to about 20% by weight active material of a pigment. Optionally, the composition may include a pigment dispersing agent, such as a fatty acid. Further additives which may advantageously employed include extenders or fillers, oxidation stabilizers, UV stabilizers, and mold release agents. The composition of the invention is fabricated into marking instruments having unexpectedly improved eraseability, ease of application, barrel breaking strength, and tip breaking strength, while eliminating bloom entirely.

Abstract: The shield covers of an overmold shielded electrical connector have pivot detents stamped into their surfaces to provide a point for the shield halves to rotate on the center dielectric with a lever type action. When fully closed, the lever action assures that the cover tabs of the shield members securely contact the connector shell and maintain a positive ground.

Abstract: A method of machining a workpiece, which is rotatable about a first axis, by a tool pivotable about a second axis parallel to the first axis and drivable about a third axis perpendicular to the second axis. To allow the circumference of the workpiece to be machined off-center without the necessity of moving the first or the second axis transversely to the plane defined by these two axes, the workpiece and the tool are rotated or pivoted about the first .[.or.]. .Iadd.and .Iaddend.second .[.axis.]. .Iadd.axes.Iaddend., respectively, at the same time, in the same direction and at the same angular velocity and, simultaneously, the second axis is displaced transversely to the first axis at such a velocity that the equation X.sup.2 =Y.sup.2 +A.sup.