Abstract: A mobile erectable stage. In one preferred embodiment, in a stored condition, the stage has the form of a trailer which can be transported from one location to another. At least one bell crank assembly is used to erect the stage by raising at least one side wall panel and the interconnected roof panel, so that a stage with a sloped roof canopy which overhangs the stage floor is deployed. The stage floor can be enlarged by adding floor panels. The stage contains a powered light truss which extends out beyond the stage floor toward the audience to shine light back onto the stage. Further, the stage contains reversible acoustic panels, one side of which is used when the stage performers are using microphones to deflect audio waves to reduce possible echoing through the microphones and the other side of which is used when the stage performers are not using sound amplification.

Abstract: A mobile erectable stage. In one preferred embodiment, in a stored condition, the stage has the form of a trailer which can be transported from one location to another. At least one bell crank assembly is used to erect the stage by raising at least one side wall panel and the interconnected roof panel, so that a stage with a sloped roof canopy which overhangs the stage floor is deployed. The stage floor can be enlarged by adding floor panels. The stage contains a powered light truss which extends out beyond the stage floor toward the audience to shine light back onto the stage. Further, the stage contains reversible acoustic panels, one side of which is used when the stage performers are using microphones to deflect audio waves to reduce possible echoing through the microphones and the other side of which is used when the stage performers are not using sound amplification.

Abstract: A five valve manifold for use with a pressure sensing apparatus is disclosed. It has an integral body having a first face, a second face, parallel with the first face. A peripheral wall section, spans the distance between the first and second face sections. The distance is smaller than at least one of the width and the length of the second face section. A passage system within said body and includes a plurality of mutually intercommunicating passages extending from one said face to the other. A set of five valves operates selective opening and closing of the passages. The centers of the instrument outlets at one face are suited to new type of "smart" pressure transmitters, while the inlet ports at the other correspond to the usual spacing used in the industry. The invention eliminates the use of a so-called parallel flange used by the manufacturers of pressure transmitters to accommodate the difference in the centers of connecting ports of the instrument from that previously used by the industry.

Abstract: An intrusion detection apparatus employing two or more diverse types of sensors for sensing entries into a room, building or other enclosure. The sensors are connected to a signal processor which processes sensor output signals to indicate when an intrusion has occured. One type of sensor is a local sensor which includes a sensor conductor in combination with a phase locked loop. Whenever an intruding object is within close proximity to the sensor conductor and disturbs the conductor field, the equilibrium condition of the phase locked loop is disturbed to provide a sensor output signal. A second type of sensor includes in one embodiment an omni-directional antenna having a field which is located in close proximity to or which is overlapping the field of the sensor conductor. Whenever the omni-directional antenna and the sensor conductor are disturbed, the two disturbances are detected by the signal processor to signal an intrusion if the proper time relationship exists between them.