Abstract: An apparatus for measuring emission time delay during irradiation of targeted samples by utilizing digital signal processing to determine the emission phase shift caused by the sample is disclosed. The apparatus includes a source of electromagnetic radiation adapted to irradiate a target sample. A mechanism generates first and second digital input signals of known frequencies with a known phase relationship, and a device then converts the first and second digital input signals to analog sinusoidal signals. An element is provided to direct the first input signal to the electromagnetic radiation source to modulate the source by the frequency thereof to irradiate the target sample and generate a target sample emission. A device detects the target sample emission and produces a corresponding first output signal having a phase shift relative to the phase of the first input signal, the phase shift being caused by the irradiation time delay in the sample.

Abstract: An apparatus is disclosed for use in a multi-zone alarm system having a single-pair wire alarm loop and programmable switching circuit arrangements. The apparatus includes a current source serially connected to the single-pair wire loop and selectively operative to provide a predetermined current signal in the loop. A plurality of zone sensing devices are arranged in a normally closed series circuit along the single-pair wire loop. Each of the zone sensing devices is adapted for generating coded voltage changes and alarm activation caused by an open circuit created therein. An element is provided for indicating the condition of each of the zone sensing devices, while a mechanism is provided for selectively arming and disarming the zone sensing devices.

Abstract: A device is provided for use in aligning an exterior mirror of a vehicle to a preestablished position. The device includes an alignment sight securable relative to the mirror to selectively target a fixed member of the vehicle. A mechanism attaches the alignment sight to the mirror, and a device is provided for pivoting the alignment sight in its attached position relative to the mirror in at least two planes. Finally, a mechanism is provided for selectively fixing the pivotal position of the alignment sight relative to the mirror upon targeting the sight to a fixed vehicle member when the mirror is in its preselected position. In one embodiment of the present invention, the alignment sight is adapted to also form a whistle designed to emit sounds at wavelengths audible to animals as air passes therethrough.

Abstract: An artificial campfire device is disclosed. The device is fueled by a pressurized fuel source and is adapted for permanent mounting to a fixed ground member. The device includes a base receptacle having a peripheral edge defining an open top and an interior bottom surface. The base receptacle is mountable to the fixed ground member. A burner member is mounted to and positioned above the interior bottom surface and is adapted to provide a flame of variable height. A fuel control mechanism is adapted for coupling a pressurized fuel source exterior to the receptacle base with the burner member to control the flow of fuel to the burner member and the size of flame emitted thereby. Finally, a plurality of artificial refractory log members are secured to each other in crisscross fashion to form a log cluster, and the log cluster is permanently secured to the base receptacle bottom surface.