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Compressor surge counter

Description: A surge counter for a rotating compressor is provided which detects surging by monitoring the vibration signal from an accelerometer mounted on the shaft bearing of the compressor. The circuit detects a rapid increase in the amplitude envelope of the vibration signal, e.g., 4 dB or greater in less than one second, which is associated with a surge onset and increments a counter. The circuit is rendered nonresponsive for a period of about 5 seconds following the detection which corresponds to the… more
Date: April 13, 1981
Creator: Castleberry, K.N.
Partner: UNT Libraries Government Documents Department
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Neutral beamline with improved ion-energy recovery

Description: A neutral beamline generator with unneutralized ion energy recovery is provided which enhances the energy recovery of the full energy ion component of the beam exiting the neutralizer cell of the beamline. The unneutralized full energy ions exiting the neutralizer are deflected from the beam path and the electrons in the cell are blocked by a magnetic field applied transverse to the beamline in the cell exit region. The ions, which are generated at essentially ground potential and accelerated t… more
Date: April 13, 1981
Creator: Dagenhart, William K.; Haselton, Halsey H.; Stirling, William L. & Whealton, John H.
Partner: UNT Libraries Government Documents Department
open access

Capacitively-Coupled Inductive Sensor

Description: It is therefore an object of the present invention to provide a capacitively-coupled inductive shunt current sensor. To achieve the other object, and in accordance with the purpose of the present invention, as embodied and broadly described herein, the apparatus of this invention may comprise a capacitively coupled inductive shunt current sensor comprising: annular inductive channel means formed in a conductor carrying a high voltage pulsed current; an electrode capacitively coupled to said con… more
Date: April 13, 1981
Creator: Ekdahl, C. A.
Partner: UNT Libraries Government Documents Department
open access

Neutral beamline with improved ion-energy recovery

Description: A neutral beamline employing direct energy recovery of unneutralized residual ions is provided which enhances the energy recovery of the full energy ion component of the beam exiting the neutralizer cell, and thus improves the overall neutral beamline efficiency. The unneutralized full energy ions exiting the neutralizer are deflected from the beam path and the electrons in the cell are blocked by a magnetic field applied transverse to the beam direction in the neutralizer exit region. The ions… more
Date: April 13, 1981
Creator: Kim, J.
Partner: UNT Libraries Government Documents Department
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