Abstract: A system for configuring communication paths in a radio communications system including a plurality of radios, a plurality of antennas and radio frequency distribution communications equipment in communication with the plurality of radios and antennas. The configuring system includes at least one of (1) a graphical user interface display window including a list of radios and a list of paths by which the radios communicates with the antennas via the radio frequency distribution communications equipment, and (2) a block diagram including a plurality of radios, a plurality of antennas and paths by which the plurality of radios communicates with the plurality of antennas via the radio frequency distribution communications equipment. The system further includes means for changing at least one path displayed in at least one of the display window and the block diagram. Also disclosed are methods for implementing the system.

Abstract: A system for configuring communication paths in a radio communications system including a plurality of radios, a plurality of antennas and radio frequency distribution communications equipment in communication with the plurality of radios and antennas. The configuring system includes at least one of (1) a graphical user interface display window including a list of radios and a list of paths by which the radios communicates with the antennas via the radio frequency distribution communications equipment, and (2) a block diagram including a plurality of radios, a plurality of antennas and paths by which the plurality of radios communicates with the plurality of antennas via the radio frequency distribution communications equipment. The system further includes means for changing at least one path displayed in at least one of the display window and the block diagram. Also disclosed are methods for implementing the system.

Abstract: A plating medium for the presumptive identification of Bacillus cereus, Bacillus thuringiensis and/or Bacillus anthrasis that includes a nutrient base to facilitate growth of Bacillus cereus, Bacillus thuringiensis and Bacillus anthrasis, a chromogenic substrate that changes color responsive to the presence of PC-PLC enzymes, and an ingredient that promotes the expression of the PC-PLC enzyme. In a preferred embodiment, the medium includes a second chromogenic substrate that changes color responsive to the presence of PI-PLC enzymes and an ingredient that promotes the expression of the PI-PLC enzyme.

Abstract: An isolation plating medium for the identification of Salmonella bacteria in a sample containing a plurality of different bacteria comprising a mixture of a carbohydrate capable of being a metabolic source for Salmonella bacteria and supporting colonies of Salmonella bacteria, a pH indicator dye that changes the color of the plating medium to a first color different from the color of the medium responsive to a change in the pH of the medium, a first substrate that does not react with Salmonella bacteria and injects color into the medium of a second color responsive to the presence of beta-galactosidase, the second color contrasting with the first color and the color of the medium, a second substrate that does not react with Salmonella bacteria and injects color into the medium of substantially the same color as the second color responsive to the presence of beta=galactosidase, and an ingredient for thickening the mixture in sufficient quantity to solidify the mixture.

Abstract: A radio communications system operational within the medium frequency range for underground mine communications, coupling MF carrier signals into existing conductive channels extending to within the mine and devices within the mine and coupled to the conductive channel for receiving the MF carrier signals and communicating with portable and mobile transceivers operational within the MF frequency range and in the common seam mode.

Abstract: A security device for determining the opening or closed condition of an access gate, such as a door or window hinged within an opening in a wall, has a detector unit mounted on the wall adjacent to the opening and linked to a remote control unit by a radio transmitter in the detection unit and a radio receiver in the control unit. The detection unit has an infrared generator and an infrared detector isolated from the generator, the detector and generator confronting a reflector mounted on the access gate when the access gate is closed. The reflector is translated from the field of the infrared generator when the access gate is open. The infrared generator is excited by a pulse generator to produce pulses of infrared radiation, and the scattered radiation from the reflector is detected by the infrared detector to produce electrical pulses coincident with the pulse generator.

Abstract: A portable transmitter provided with a base for mounting a subassembly with a circuit board and a battery adjacent to each other and within a removable cover. The subassembly having adjustable frequency determining elements and the base having a flap integral therewith extending over and covering the frequency determining elements.

Abstract: A wireless security system in which a sensor for detecting a security violation is provided with a radio frequency transmitter adapted to excite the receiver of a control unit at a different location, the transmitter of the sensor radiating a signal responsive to the occurrence of a security violation. The sensor also having means to periodically excite the transmitter after the lapse of a period of time to indicate that the sensor is in proper working order, that period varying randomly. The control unit is provided with a memory and stores responses to the random signals, and at intervals long with respect to the random periods, samples the memory. The control unit responds to the absense of a stored response from the transmissions of the sensor.In a preferred construction, a plurality of sensors are employed with a single control unit, each of the sensors radiating a unique encoded signal.

Abstract: A biochemical oxygen demand measuring device which utilizes the decrease in pressure in an air space above the sample under measurement in a sealed reaction vessel to actuate an oxygen generator which utilizes an electrolysis cell communicating with the reaction vessel. The quantity of oxygen supplied by the oxygen generator is a measurement of the biochemical oxygen demand and is proportional to the quantity of electricity used in the electrolysis cell. Electrical pulses in a chain of constant amplitude and constant duration are applied to the electrolysis cell and the chain of pulses is interrupted by means responsive to the pressure in the reaction vessel to maintain the pressure in the reaction vessel constant. A counter is employed to count the pulses over a period of time as a measurement of the oxygen taken up by the reaction in the pressure vessel. A barometric correction device is employed with a sensing electrode in the electrolysis cell to control the pulses of electrical energy.

Abstract: A security system in which fire or intrusion signals may be impressed on a first and a second monostable oscillator connected in timing circuits, the first monostable oscillator producing an output for a first limited time period to excite an alarm, and coincidently in time a second monostable oscillator producing an output of shorter second time period for delaying actuation of the alarm to permit the operator to deactivate the unit prior to actuation of the alarm, each of the monostable oscillators using an integrated circuit and being reset by application of power to the unit and during function key switch position change. The fire channel has top priority over any other functional characteristics of the master control.