Abstract: An antenna assembly is formed from at least one antenna and associated conductive connecting element (wires, conductive gel or liquid, etc.) mounted within a deformable membrane that allows the antenna assembly to be installed or fixed within a narrow gap or crevice, wherein the gap or crevice may be subject to harsh environmental conditions. The gap or crevice is preferably a gap or crevice in a closure. The antenna assembly typically has a low profile, and is installed either flush with or within a traffic surface or within ¼″ above the surface. The deformable membrane will yield under force, but return to its original shape once the force is removed. The deformable membrane and antenna assembly will deform to conform to the shape of a gap or crevice into which the antenna assembly is installed.

Abstract: An antenna assembly is formed from at least one antenna and associated conductive connecting means (wires, conductive gel or liquid, etc.) mounted within a deformable membrane that allows the antenna assembly to be installed or fixed within a narrow gap or crevice, wherein the gap or crevice may be subject to harsh environmental conditions. The gap or crevice is preferably a gap or crevice in a closure. The antenna assembly typically has a low profile, and is installed either flush with or within a traffic surface or within ¼″ above the surface. The deformable membrane will yield under force, but return to its original shape once the force is removed. The deformable membrane and antenna assembly will deform to conform to the shape of a gap or crevice into which the antenna assembly is installed.

Abstract: A vortex flow meter has a vortex shedder that spans a diameter or other chord of a fluid-guiding pipe, and protrudes partially externally through two opposed openings in the pipe wall. The vortex shedder includes two spaced-apart mounting pads and an elongate portion spanning therebetween. At least one mounting pad includes a cavity for seating a sensor. One preferred practice of the invention inserts the shedder through the openings into the fluid-guiding pipe such that the elongate section resides within the flowing fluid and produces a stream of space-apart vortices, and the mounting pads protrude at least partially through the openings. The sensor produces electrical signals in response to the induced vortices, and an electronic module receives the electrical signals and calculates the flow velocity of the fluid based on the frequency of the electrical signals.

Abstract: A dipole antenna is constructed of flexible conductive elements. These elements are encased in a flexible protective covering or attached to a semi-rigid substrate. This covering protects the antenna during handling, transport, and installation. The conductive elements and the protective covering may be further encased or embedded in an external protective covering. The final external protective covering serves as an adhesive to permanently attach the antenna to a mounting surface. When installed on the mounting surface, the antenna has a low profile with respect to the mounting surface.

Abstract: A dipole antenna is constructed of flexible conductive elements. These elements are encased in a flexible protective covering or attached to a semi-rigid substrate. This covering protects the antenna during handling, transport, and installation. The conductive elements and the protective covering may be further encased or embedded in an external protective covering. The final external protective covering serves as an adhesive to permanently attach the antenna to a mounting surface. When installed on the mounting surface, the antenna has a low profile with respect to the mounting surface.

Abstract: An improved safety pressure relief valve which is particularly applicable to valves utilizing pressure taps for sensing the pressure within the inlet nozzle, such as pilot operated valves. The valve includes a valve body having an inlet opening into which a full nozzle is inserted. An annular port surrounds the periphery of the nozzle. An opening in the nozzle leading to the annular port provides for the insertion of a pilot or dipper tube therein. The valve body includes a channel leading between the annular port and an external tap for the pressure sensing line connected to the pilot control means. The design permits the nozzle to be rotated to any angular position with respect to the valve body, thus permitting ready assembly and disassembly of the valve. In a second embodiment, an annular port is used to permit direct injection of purging fluid into the nozzle to prevent its clogging.

Abstract: An improved pressure relief valve with an improved device for securing the blowdown ring of the valve without compromising its pressure integrity. These pressure relief valves include a nozzle extending into the interior of the valve and communicating with the pressure vessel and a blowdown ring which is threaded to the nozzle. Atop the nozzle's opening is a disc which is spring biased into engagement with the nozzle to seal same. The device includes an annular collar surrounding at least a portion of the blowdown ring and the nozzle, a first locking member secures the blowdown ring to the collar and a second locking member secures the collar to the nozzle. The device may utilize the wire seal required by many safety codes.