Conduction-responsive meter head
AssigneeLeybold-Heraeus GmbH
InventorsGunter Reich, Rudolf Flosbach
Life of this patent
Estimating the term…
Abstract
A conduction-responsive meter head has a device having electrical conduction responsive to a condition such as pressure to be metered. The device communicates with the condition to provide its electrical-conduction response to a bridge electrically including the device. A power supply has two terminals on the meter head for providing electrical power to the bridge. The measurement signal from the bridge is provided, however, to a third terminal by a lead from the bridge.
Claims7
A conduction-responsive meter head, comprising:
- a device having electrical conduction responsive to a condition to be metered and means for communication with the condition, whereby to provide such electrical-conduction response;
- a bridge electrically including the device;
- power supply means comprising two terminals for providing electrical power to the bridge;
- measurement signal comprising a third terminal and a lead connecting the third terminal to the bridge for providing a measurement signal from the bridge to the third terminal;
- and
- a current transformer series-inserted in the lead.
A conduction-responsive meter head, comprising:
- a device having electrical conduction responsive to a condition to be metered and means for communication with the condition, whereby to provide such electrical-conduction response;
- a bridge electrically including the device;
- power supply means comprising two terminals for providing electrical power to the bridge;
- measurement signal means comprising a third terminal and a lead connecting the third terminal to the bridge for providing a measurement signal from the bridge to the third terminal;
- a balancing resistor in the bridge and a balancing resistor series-inserted in the lead;
- and
- a current transformer series-inserted in the lead.
A conduction-responsive meter head, comprising:
- a device having electrical conduction responsive to a condition to be metered and means for communication with the condition, whereby to provide such electrical-conduction response;
- a bridge electrically including the device;
- power supply means comprising two terminals for providing electrical power to the bridge;
- measurement signal means comprising a third terminal and a lead connecting the third terminal to the bridge for providing a measurement signal from the bridge to the third terminal;
- and
- a second device having electrical conduction responsive to the condition to be metered and means for communication with the condition, whereby to provide such electrical-conduction response;
- and a second bridge electrically including the second device;
- and
- the power supply means being also for providing electrical power to the second bridge;
- and
- the lead of the measurement signal means also connecting the third terminal to the second bridge for providing a combined measurement signal from both of the bridges to the third terminal.
A conduction-responsive meter head, comprising:
- a device having electrical conduction responsive to a condition to be metered and means for communication with the condition, whereby to provide such electrical-conduction response;
- a bridge electrically including the device;
- power supply means comprising two terminals for providing electrical power to the bridge;
- measurement signal means comprising a third terminal and a lead connecting the third terminal to the bridge for providing a measurement signal from the bridge to the third terminal;
- and
- two further terminals and a variable resistor connected across the terminals for equalizing a display of the measurement signal when the display is connected to the terminals.
Dependencies are inferred from the claim text.