Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1980-06-06
1989-04-25
LaRoche, Eugene R.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
315207, 315241R, 315243, H05B 720, G01J 3443
Patent
active
RE0329118
ABSTRACT:
A capacitor is charged to a high voltage, and then is discharged through a circuit comprising an analytical spark gap and first and second inductive elements, whereby the discharge current is oscillatory. The waveform of the discharge current is modified by a diode rectifier shunted across the series combination of the analytical spark gap and the second inductive element. To provide for adjustment of the waveform over a wide range, the second inductive element is adjustable in inductance. The first inductive element is also preferably adjustable in inductance. Provision may also be made for changing the capacitance of the capacitor. A reversing switch makes it possible to reverse the polarity of the diode rectifier. One or more control spark gaps may be connected in series with the analytical spark gap. An electronic switching device may be connected across one of the control spark gaps to initiate the discharge of the capacitor. Either or both of the inductive elements may be replaced with other reactances or impedances, such as transmission lines. Coupling may be provided between the inductive elements. Inductance or impedance may be provided in the diode circuit. The capacitor may be replaced with some other source of alternating current or pulses. The spark may be ignited by high voltage, developed at a radio frequency by a quarter wave line. The diode rectifier may be replaced with a silicon controlled rectifier, silicon controlled switch, or some other active element.
REFERENCES:
patent: 2895080 (1959-07-01), Branker
patent: 2980798 (1961-04-01), Romand et al.
patent: 3202874 (1965-08-01), Bardocz
patent: 3234431 (1966-02-01), Bardocz
patent: 3246113 (1966-04-01), Scarpelli
patent: 3283116 (1966-11-01), Scarpelli
patent: 3316381 (1967-04-01), Gibson
patent: 3465203 (1969-09-01), Galster et al.
Walters et al, Emission Characteristics and Sensitivity in a High-Voltage Spark Discharge, Analytical Chemistry, vol. 37, Nov. 1965, pp. 1484-1503.
Murray et al, Properties and Use of a High Frequency Spark Discharge for Local Micro-Analysis, J.O.S.A., vol. 31, Jun. 1941, pp. 433-438.
Scheibe et al, Uber Eine Neue Anwendung der Emissionsspektraskopie zur Lokalen Mikroanalyse, Spectrochimica Acta, vol. 1, No. 47, 1939, pp. 47-65.
Walters et al, Oscilloscopic Characterization of an Electronically Ignited Spark Source, Applied Spectroscopy, vol. 20, No. 2, Mar./Apr. 1966, pp. 80-89.
LaRoche Eugene R.
Lee B.
Wisconsin Alumni Research Foundation
LandOfFree
Adjustable waveform spark source does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjustable waveform spark source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable waveform spark source will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1186011