Abstract: Disclosed herein are a system for collecting a sample and optionally detecting or analyzing an electrical property thereof, the method comprising: means for obtaining a sample in a sample container; means for directing the sample into a sensing chamber in fluid communication with the sample container, the sensing chamber comprising a plurality of sensing chamber electrodes positioned at the sensing chamber and configured to be in contact with the sample when the sample is directed into the sensing chamber; means for applying an electrical signal to the sample with a read-out analyzer via the plurality of sensing chamber electrodes; the plurality of sensing chamber electrodes in operable communication with the read-out analyzer; and means for detecting the effect of the sample on the electrical signal, thereby determining an electrical property of the sample.

Abstract: Disclosed herein are a system for collecting a sample and optionally detecting or analyzing an electrical property thereof, the method comprising: means for obtaining a sample in a sample container; means for directing the sample into a sensing chamber in fluid communication with the sample container, the sensing chamber comprising a plurality of sensing chamber electrodes positioned at the sensing chamber and configured to be in contact with the sample when the sample is directed into the sensing chamber; means for applying an electrical signal to the sample with a read-out analyzer via the plurality of sensing chamber electrodes; the plurality of sensing chamber electrodes in operable communication with the read-out analyzer; and means for detecting the effect of the sample on the electrical signal, thereby determining an electrical property of the sample.

Abstract: A brake light system is arranged to respond to movement within an r.f. field to provide a signal used to activate the brake light when movement within the r.f. field exceeds a predetermined velocity.

Abstract: A switching amplifier system which in one embodiment includes switching circuitry responsive to a tri-state command signal for providing a power output from a power supply which has amplitude levels, time durations, and polarities corresponding to the tri-state command signal for supply to a load via a suitable filter. A further embodiment includes a linear amplifier, the switching circuitry responding to a fourth state command signal for actuating the linear amplifier to respond directly to an input signal when the amplitude of the input signal is below a selected level.

Abstract: An inertial borehole survey system is disclosed. The survey system of the present invention includes a probe suitable for insertion into a borehole. The probe includes a plurality of temperature sensitive inertial measuring instruments which are utilized to survey the borehole during the descent or ascent of the probe. Accuracy of these instruments is maintained by enclosing the instruments in a thermal insulating package and by providing a mass of isothermal heat absorbing material which exhibits a phase change at a temperature well above most ambient temperatures. In a preferred embodiment of the present invention, a heat absorbing material is utilized which exhibits a phase change at a temperature of 116.degree. F. The probe also includes a longitudinal air passage which permits ambient temperature air to be utilized to cool the isothermal heat absorbing material by passing air through the length of the probe.

Abstract: A system and method for surveying, with accuracies better than one foot per thousand feet of depth, very deep boreholes having the attendant small diameters, high temperatures and high pressures with very high accuracy. A downhole probe is used having a small diameter, less than about four inches. Three linear type accelerometers and at least two gyros to provide three sensitive axes are fixedly mounted at points spaced along the axis of an elongated, rigid, thermally conductive support member to form an instrument cluster. Signals from these instruments are then processed and transmitted serially over a conductor of a conventional wireline to the surface unit where a surface computer continuously computes and records the current position of the instrument.

Abstract: A fault-tolerant clock system for providng digital timing signals (system clock signals) is provided by a plurality of clock sources. Each clock source receives as inputs the generated clock signals from all the other clock sources and contains receiver circuitry to derive a system clock signal from said clock sources which is the consensus clock signals of the other sources. Each clock source generates and distributes to the other clock sources a clock signal which is phase locked to the derived system clock from its clock receiver. In a system of (2r+2) clock sources (r+2) of them will remain phase locked to each other despite up to r clock source failures. Any clock receiver responsive to any (2r+1) of the clock sources can therefore derive a correct system clock despite up to r clock source failures.

Abstract: A system for determining cutting-tool wear which utilizes a sensor for producing an output signal representing the cutting profile of the tool and a data processing system using microprocessor control which is responsive to the sensor for storing information concerning such cutting profile when the tool is initially installed and for comparing updated cutting profile information with the stored initial cutting profile information to provide output information concerning the wear characteristics of the tool. The wear information can be displayed, either visually or audibly, or can be supplied to an external data processor, such as the overall machine tool processor, for use therein. The system includes means for correcting errors which arise because of sensor and tool bit characteristics.

Abstract: Circuitry for providing electrical isolation between an input signal source and other circuitry which utilizes such input signal. The isolation circuitry uses an optical coupling means comprising a light-emitting diode circuit and a photo-responsive element, the input signal being supplied by a bridge circuit which provides a unidirectional voltage from the input signal which is then applied to a normalizing, or limiting, circuit which converts the unidirectional voltage to a substantially constant value which is supplied to the light-emitting diode circuit. The circuit is responsive to an input signal which can be an AC signal or a DC signal of either polarity, such circuit having a high degree of noise survivability even in the presence of transient noise signals such as "showering arcs" having extremely high amplitudes.

Abstract: The machine is for shampooing and cleansing a person's hair and is constructed with a sink in front of which the person preferably sits and means associated with the sink for receiving the head with the face directed substantially downwardly. Once in position a hood is pivotal to cover the hair and has a nozzle array associated therewith. This nozzle array includes individual nozzles for dispensing a shampoo, creme rinse, or rinse water. The machine can be operated manually to apply shampoo, creme rinse or a water rinse, or can be operated automatically in a pre-programmed manner. The machine is provided with control circuitry including a binary counter and associated decoder logic, temperature regulation circuitry and temperature sensors. The shampoo and creme rinse are contained in individual containers at least one of which is provided with a mixing chamber for mixing the incoming hot and cold water prior to dispensing through the nozzle array.