Abstract: When installed on a door to a room, e.g. a restroom, or other area where it is desired to monitor occupancy status of the room or other area, a light source (e.g. a light emitting diode) outside the room or area provides a visual signal to those outside the room or area whether it is occupied (flashing) or not (dark). Optionally there is a second light source, or other indicator, inside the room or area that signals, simultaneously with the outside light, to an occupant of the room or area that the device is properly working. Optionally "occupied" and "unoccupied" signals are sent to a remote station to keep a remote observer informed of the occupancy status of an out-of-sight room or area. For example, the remote signalling option can be used by persons to avoid useless trips to a distant restroom that is already occupied. Preferably an infrared sensor mounted in a cylindrical reflector in a casing mounted on the door senses movement of an occupant during a pre-set time period, i.e.

Abstract: A hydrostatic measurement module senses elevation relative to a fluid reservoir under a reference pressure. The measurement module further includes a plurality of functions and modes. A zero function sets the display to zero at any selected benchmark elevation. One function allows the invention to measure heights and elevations beyond its physical reach. A hold function freezes stable display values. A mark function sets upper/lower limit tones described in the existing patent. A record function allows a large number of measurements to be taken for real-time calculation and display of average, minimum and maximum values. A scale function can be used to select one of five display scales. A resolution function permits more rapid readings at lower precision. A temperature function displays ambient temperature. A record data function is used to accumulate 135 or more individual data points within the measurement module or to download data as it is taken to a computer, such as a pocket personal computer (PC).

Abstract: A hydrostatic measurement module senses elevation relative to a fluid reservoir under a reference pressure. The measurement module further includes a plurality of functions and modes. A zero function sets the display to zero at any selected benchmark elevation. One function allows the invention to measure heights and elevations beyond its physical reach. A hold function freezes stable display values. A mark function sets upper/lower limit tones described in the existing patent. A record function allows a large number of measurements to be taken for real-time calculation and display of average, minimum and maximum values. A scale function can be used to select one of five display scales. A resolution function permits more rapid readings at lower precision. A temperature function displays ambient temperature. A record data function is used to accumulate 135 or more individual data points within the measurement module or to download data as it is taken to a computer. such as a pocket personal computer (PC).

Abstract: A device for providing one or more signals that are functions of a sensor module's altitude relative to a reference body of liquid. The sensor module has one or two hydrostatic pressure transducers, which transducers are linked to the bodies of liquid by respective liquid-filled elongated flexible conduits. The first two embodiments have only single transducers each connected by a single conduit to a single body of liquid. In each case, the body of liquid is under ambient atmospheric pressure plus added pressure to maintain a positive pressure with respect to ambient atmospheric pressure to prevent dissolved gases from coming out of solution and creating bubbles in the conduits. In a third embodiment, a differential transducer has one port linked to the body of liquid and a second port linked to a pressurized gas which also applies pressure to the body of liquid, again to maintain positive pressure within the operational limits of the device.

Abstract: A programmed computer having an integral speech synthesizer and pre-programmed scripts conducts interactive methods of treating a person suffering from enuresis. The computer, preferably at the bedside of the person being treated, communicates with the person by means of a display panel, a plurality of input keys, and synthesized speech. The computer uses primarily uttered procedural instructions and verbal rewards, such as congratulatory statements, and visual displays to conduct the treatment methods. The person communicates selections and responses to the computer by means of the key. The computer receives RF signals broadcast from two sources: a device for sensing wetness which attaches to the underpants of the person, and a momentary remote key preferably located next to or on a toilet. The signals are encoded to enable the computer to distinguish between the sources.

Abstract: An hydrostatic pressure sensor module is in liquid communication with a body of liquid under ambient atmospheric pressure via an elongated, flexible liquid conduit, the conduit being filled with the liquid. A transducer as a part of the sensor module converts the hydrostatic pressure developed by the liquid in the conduit at the sensor module to a signal which is a function of said pressure, the pressure being a function of sensor module elevation relative to the body of water. The signal is processed according to a transfer function which adapts it to be displayed, the gain of the transfer function being adjustable over a range in order to compensate for undesirable gain variations over an equal or lesser range, for example, due to parametric changes in components. As a part of the transfer function or separately, signal translator adjusts the signal to make it referenced to a second signal which corresponds to an arbitrarily set reference level.

Abstract: A computing and indicating device having a display which is calibrated through a range of 0% to 100% of usable heat energy remaining in a heat storage unit. The limits of such range are adjustable to meet the desires of the user. A plurality of comparators compare the temperature of the heat storage unit to biasing signals of progressively different values. Each comparator is effective to energize one of a plurality of displays. Each display represents a different percent of usable heat remaining.