Abstract: A fluid flow sensing and bubble detecting apparatus, comprising:—housing provided with a cavity configured to receive a tube through which conductive fluid flows;—a fluid flow sensing and bubble detecting electrical sensor assembly supported by the housing and configured to sense the flow of the fluid flowing through the tube and to detect bubbles in the fluid; and—an electrically grounded Electro-Magnetic Interference (EMI) shielding arranged between at least a part of the sensor assembly and the cavity such that the EMI shielding protects the sensor assembly from unwanted EMI emanating from a tube received within the cavity, which might otherwise cause the fluid flow sensing and bubble detecting apparatus to generate false bubble detection signals.

Abstract: A cylindrical personal protection device is disclosed having an aerosol cylinder with a nozzle, a light and a removable safety cap. In an embodiment with dual cylinders, the cylinders contain a deterrent spray and a glowing liquid. A trigger proximate the cylinders expells the contents of the cylinders where they are mixed prior to explusion. A body section has a battery receiving area and an alarm. The electronics connect the battery receiving area, trigger, alarm and light. The electronics activates the light and alarm, in response to activation of the trigger, causing them to pulse simultaneously. The cylinders and the body portion are removably connected to one another. A safety lid prevents activation of the trigger.

Abstract: A personal protection device is disclosed with a mixing area and mixing nozzle. A fluid container rests on a moveable container base having a nozzle which extends into the mixing area. The fluid container can be a two portion flexible ampule or a canister. A two part glowing fluid is used, which is mixed prior to expulsion from the device. An irritative substance is placed in one of the mirror image sections. A compression device is maintained in a non-compressed position when unarmed and is activated by a trigger and locking device. A battery receiving area is connected to the internal electronics, trigger, alarm and light. A moveable safety latch is proximate the trigger preventing access to the trigger when in the unarmed position and allows access when in the armed position. A safety cap is held in the unarmed position by a reset bar. A plug portion in the safety cap is dimensioned to fit within mixing area nozzle.

Abstract: A cylindrical personal protection device is disclosed having an ampule section containing a flexible, multi-chamber ampule with a nozzle, a light and a removable safety cap. The ampule contains a deterrent spray and a glowing liquid. At least a portion of the ampule portion is removable allowing access to the ampule. A trigger proximate the ampule extends beyond the periphery of the ampule section. A body section has a battery receiving area and an alarm. The electronics connect the battery receiving area, trigger, alarm and light. The electronics activates the light and alarm, in response to activation of the trigger, causing them to pulse simultaneously. The ampule portion and the body portion are removably connected to one another. At least a pair of protective bumpers prevent damage. A safety pin prevents the trigger from contacting the ampule and partial removal of the safety pin allows the trigger to contact the ampule, expelling the contents of the ampule, and activating the alarm and light.

Abstract: A magnetic switch for recording the change in position of a magnetic field includes a first object on which is positioned a source of magnetic force for creating a magnetic field and a second object on which is positioned at least one type II superconducting medium. The type II superconducting medium exhibits a permanent magnetic component after exposure to a magnetic field, such that relative motion between the first object and the second object causes the magnetic field to induce a residual magnetization in the superconducting medium.

Abstract: A tunable electromagnetic filter includes a type II superconducting medium which exhibits a permanent ferromagnetic component after exposure to a magnetic field. A magnetic field passes through the medium in a first direction, while an input conductor wound around the medium in a second direction perpendicular to the first direction receives an input signal, and an output conductor is wound around the medium in a third direction perpendicular to the first and second directions. At resonance of the medium, an alternating field magnetic component perpendicular to both the incoming signal and the magnetic field is created to induce a current of the resonant frequency in the output conductor.

Abstract: A process for generating electrically conductive patterns on a dielectric substrate, such as an insulating sheet, which comprises applying to preselected areas of the substrate a preselected concentration of an ink in the form of an oxidizing agent, such as a solution of a ferric salt, e.g., ferric chloride or ferric ethylbenzenesulfonate, and which can also contain a suitable binder or thickening agent, to form printed images on the substrate surface. The resulting printed surface of the substrate is then exposed to an excess of reactant, e.g., pyrrole monomer in vapor phase, which reacts with the oxidizing agent to develop conductive images, as by forming polypyrrole, in those printed areas of the substrate containing the oxidizing agent.

Abstract: Apparatus and method are disclosed for measuring the volume of a chamber of a meter prover. The meter prover includes a piston adapted for rectilinear movement within said cylinder between a first position and a second position. The volume measuring apparatus comprises an antenna disposed within the chamber and a generator coupled to apply electromagnetic energy to the antenna whereby electromagnetic waves are emanated into the chamber. A detector is coupled to the antenna to detect electromagnetic energy reflected from the chamber and is in turn coupled to a resonant detector in the form of a cathode ray tube, whereby a minimum of the level of the electromagnetic energy may be determined. Further, a frequency detector in the form of a counter, is connected to the output of the generator to detect the frequencies of the generator output at which the minimum level occurs as observed upon a display device corresponding to the establishment of a resonant standing wave within the chamber of the meter prover.

Abstract: Apparatus for calibrating a meter prover is disclosed including a chamber taking the form of a substantially perfect right circular cylinder, a piston adapted for rectilinear movement within said cylinder between a first position and a second position, means for moving the piston from its first position to its second position, and an encoder coupled to the piston for providing an output signal indicative of the movement of the piston and thus the volume of fluid displaced by that movement of the piston. The calibrating apparatus comprises an antenna electromagnetic energy to the antenna whereby electromagnetic waves are emanated into the chamber. A detector is coupled to the antenna to detect electromagnetic energy leaving the chamber and is in turn coupled to a resonant detector in the form of a cathode ray tube, whereby a minimum of the level of the electromagnetic energy may be determined.

Abstract: Disclosed is a phased array for steering an electromagnetic wave, which includes a first layer of active material, including parallel first inner and outer surfaces, and a second layer of active material, including parallel second inner and outer surfaces which are also parallel to the first inner and outer surfaces, the second layer being adjacent to the first layer. An electrically conductive ground plane of indium tin oxide is disposed between the first and second layers and in electrical contact with the first and second inner surfaces. A first series of spaced parallel electrodes, each of the electrodes being in the form of a thin strip of indium tin oxide, is deposited on the first outer surface, while a second series of spaced parallel electrodes, each of these electrodes also being in the form of a thin strip of indium tin oxide, is similarly deposited on the second outer surface but is orthogonal to the first series of electrodes.

Abstract: A device for removing a cylindrical ignition lock bolt from a chamber formed in the steering column housing of the type wherein the lock bolt has extending therefrom a radially biased detent engaging a recess formed in the lock chamber wherein the device urges a pair of elongated shims to depress the detent from its engaging position to facilitate the withdrawal of the lock bolt from the chamber.