Abstract: A method of identifying a plurality of slave processors using a master processor is provided which includes assigning a unique identification code to each of the plurality of slave processors, and transmitting an attention command from the master processor to the plurality of slave processors. The master processor then transmits a request for the slaves' unique identification code to the plurality of slave processors. The master processor then determines whether one of the plurality of slave processors unique identification code matches the classification characters. If there are no matches, a last added classification character is incremented by 1. If only one matches, the master processor identifies the one of the plurality of slave processors, and removes a last added classification character. Otherwise, if more than one matches, the master processor adds a new classification character, and sets a last added classification character to a minimum identification code character value.
May 2, 2001
Date of Patent:
February 8, 2005
Signet Scientific Company
Gert H. Burkhardt, Craig Stephen Trommler, Ronald John Yates, Albert Hai Zhou
Abstract: A bayonet-type connector assembly for releasably securing a first connector half to a second connector half along a connection axis by simple rotation of a bayonet nut. Each connector half includes a plurality of electrical contacts. The bayonet nut encircles the second connector half. Rotation of the nut to a closed position causes a thread segment on the nut to engage corresponding grooved segments formed in the first connector half, to mate the connector halves, enabling electrical contact between the connector halves. Rotation of the bayonet nut also slides a slidable portion, i.e., a nut cam, beneath a cam of the second connector half to prevent axial separation of the two connector halves. The connector assembly further includes a detent positioned to engage a securement on one of the cams to releasably lock the nut in the closed position.
Abstract: This invention resides in a wet-tap sensor assembly and related method for use with containers, such as, pressurized pipes of flowing liquids to measure the contents therein. In use, the housing is securely attached to over a hole in an external wall of the container, and a sensor cartridge of the assembly movably inserts and retracts a sensor probe relative to the contents. With the sensor probe in place, whether inserted or retracted, the assembly has means to prevent the contents from escaping. The sensor assembly includes a locking mechanism that locks the sensor cartridge in the retracted position allowing for removal of the sensor probe while preventing against inadvertent displacement of the sensor cartridge, and preferably includes a cap positioned over the sensor cartridge that prohibited removal of the sensor probe without first retracting the sensor cartridge and that disengages the locking mechanism.
Abstract: The present invention provides an improved insertion-type fluid flowmeter for measuring the flow rate of a fluid flowing through a conduit, wherein the flowmeter incorporates a strut-mounted rotor having just one or two blades such that it can rotate through a circular area of diameter substantially larger than the maximum dimension of an opening in the conduit wall through which the strut extends. This minimizes the size of the opening, which simplifies its sealing. In addition, the support and the strut are configured such that the strut is releasably secured to the support by a snap fit, to facilitate a convenient replacement of the strut and attached rotor as the need might arise. The flowmeter further incorporates a special set of ring-shaped spacers, to facilitate a convenient adjustment of the distance by which the strut projects into the conduit.
Abstract: A liquid conductivity measurement system is disclosed that accurately measures a liquid's conductivity over a range spanning at least several orders of magnitude using just a single sensor, but minimizing the adverse effects of capacitive and other non-linear factors on the conductivity measurement. The system includes a sensor having two spaced-apart electrodes immersed in the liquid and a drive signal source that applies to the sensor an ac electrical signal having a selected frequency and predetermined magnitude. A voltage detector monitors a sensor voltage signal across the sensor's two electrodes and produces a measurement of the liquid's conductivity. The drive signal source is configured to iteratively adjust the frequency of the ac electrical signal based on the sensor voltage signal, to optimize the liquid's conductivity measurement.
October 16, 1995
Date of Patent:
January 13, 1998
Signet Scientific Company
Ronald J. Yates, Martin M. Munzer, Frederic D. Hook
Abstract: An improved method for controllably positioning the plunger of a solenoid apparatus at a target position between its two extreme positions. The plunger is spring biased to a retracted position, and an electrical coil is intermittently pulsed to drive the plunger against the spring bias toward an extended position, such that the plunger oscillates about the target position. A precise, stable control of the plunger's oscillating motion about the target position is achieved by continuously measuring the plunger's actual position, in real time, based on a series of measurements of electrical current conducted through the electrical coil when it is being pulsed.
Abstract: Apparatus for automatically steering a boat having a wheel-operated steering mechanism including a detachable motor-driven actuator arm engaging the spokes of the wheel. The actuator arm is connected through a clutch to a servo mechanism for driving the actuator. The servo mechanism is responsive to a heading set on a magnetometer or a preset apparent wind indication. The heading responsive circuitry includes an integrating loop to compensate for long-term changes in steering conditions.