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Micro Weiss Electronics

Robert Stuart Jamieson

John M Weiss

A two-terminal electronic thermostat connectable in series with an electrical heater and a source of AC power and selectively providing AC power to the electrical heater, and a power supply incorporated in the thermostat for providing DC power to the control circuitry of the thermostat, includes a relay connectable in series with the electrical heater, a control circuit for selectively actuating the relay, an ambient temperature sensor and a potentiometer for setting a set point temperature. The power supply includes a current transformer having its primary winding connected in series with the relay and the electrical heater. The power supply also includes a first bridge rectifier circuit, a second bridge rectifier circuit connected to the secondary winding of the current transformer and a capacitor divider network formed from first and second capacitors and providing a desired DC voltage to the control circuit. The first capacitor is coupled to the first bridge rectifier circuit. The first and second bridge rectifier circuits have DC outputs which are connected across the second capacitor of the network, which also acts to filter the DC voltage provided to the control circuit of the thermostat.

Power supply for in-line power controllers and two-terminal electronic

A method of monitoring ion mobility in an electro-conductive fluid, such as an electrolyte in a lead-acid battery to determine the state of charge of the battery, includes the steps of immersing a pair of test electrodes in the electro-conductive fluid, and generating a test signal having a pulsed waveform. The pulsed waveform of the test signal has a voltage which remains constant over a predetermined portion of the signal's period, that portion being selected to ensure that ion mobility in the electro-conductive fluid has reached a steady state velocity. The method further includes the steps of applying the test signal to the pair of test electrodes to cause a current to flow through the test electrodes and the electro-conductive fluid, and sensing the current flow through the test electrodes and fluid. The sensed current is indicative of ion mobility in the electro-conductive fluid.

Method and apparatus for monitoring the state of charge of a battery

An elongated spar is attached longitudinally to cross-members interconnecting the hulls of plural-hull sailing craft, which spar projects forward to provide points of attachment for the forestays and headsail tacks of the sailing craft, whereby the forces exerted by the forestays and headsail tacks are removed from the bows of the hulls of the sailing craft and employed to oppose mast downthrust forces, substantially reducing the load on the hull-interconnecting structure. If applied to existing sailing craft the danger of hull breakage is eliminated and danger of hull-interconnecting structure failure is greatly reduced. The forward projection of the spar may be fabricated to cause a controllable lateral deflection of the luff of the headsail, to vary the airflow through the slot between the headsail and a mainsail. Similarly, an aftward projection may be employed to control mainsail sheeting angle and to make the mainsail self-tending when the sailing craft tacks. For sailing craft which reverse the direction of travel identical projections are provided at both ends of the spar. For sailing craft undergong a mirror-image transformation in spatial relationship of the hulls the spar is pivotally mounted such that the sails also undergo a mirror-image transformation simultaneously.

Growing community of inventors

Boynton Beach, FL, United States of America

Robert Stuart Jamieson