Schlumberger Industries

Other

Richard Alan Kramer

Scott C Swanson

Robert James Mayell

A fabricated building includes a plurality of vertically extending guide members and a plurality of building blocks arranged with the aid of said guide members to define a wall structure. Each block has a first end provided with a vertically extending guide hole having one of the guide members extending therethrough, and a second end coupled to a first end of a horizontally adjacent block. The fabricated building also includes a first threshold defining a first guide hole having one of the guide members extending therethrough and a second guide hole having one of the guide members extending therethrough. The fabricated building also includes a second threshold defining a first guide hole having one of the guide members extending therethrough and a second guide hole having one of the guide members extending therethrough. The first threshold and the second threshold define a frame space therebetween.

Fabricated building

An isolated current shunt transducer includes a current shunt that produces a voltage difference between the current shunt's first and second ends, with the voltage difference being related to a current flowing through the current shunt. The transducer also includes an isolation barrier positioned between the current shunt and a processing circuit to isolate the processing circuit from a voltage that is common to both ends of the current shunt. Two or more transducers may be included in a power meter for measuring power delivered to a load by a multiple phase power distribution circuit. In such a power meter, a processing circuit is connected to the current shunts through the isolation barriers and is operable to produce multiple phase power measurements based on the differences between the voltages at the first and second ends of the current shunts.

Isolated current shunt transducer

A secondary communications device, such as a modem, a facsimile machine, an automatic meter reader or an answering machine, shares a telephone line with a subscriber's telephone and must grant the telephone primary access to the line. The present invention prevents the secondary device from seizing the line when the telephone is already off-hook and will terminate a line seizure by the secondary device if the subscriber picks up the telephone handset during use of the line by the secondary device. An average interval for charging a capacitor to a threshold voltage in response to an on-hook voltage appearing across the telephone line is determined. When the secondary communications device is ready to use the line, circuitry measures an interval for charging the capacitor in response to the current voltage appearing across the telephone line. The secondary communication device seizes the line only if the measured interval does not exceed the average interval by more than a predetermined amount. After seizure by the secondary communication device, a steady-state condition is brought about between the secondary device, the line steady-state impedance, and the central office voltage source. If the line impedance drops from the steady-state value, the circuitry assumes that the subscriber has taken the telephone off-hook and terminates the line seizure by the secondary device.

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Lawrenceville, GA, United States of America

Richard Alan Kramer