Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1986-08-04
1987-06-02
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
315 71, 356312, 356315, 364498, G01J 310, G01J 342
Patent
active
046698795
ABSTRACT:
The present invention is directed to a lamp assembly for use in atomic absorption spectrometers in which an atomic element hollow cathode lamp assembly has a lamp formed by a hollow cathode electrode and an anode electrode within a sealed envelope. A base structure is attached to the envelope, and located within the base structure is a resistor network consisting of four resistors connected to a common lead and having four plug terminals protruding from the base structure. Two further plug terminals also protruding from the base structure are connected respectively to the cathode and anode electrodes to provide a connecting structure for connecting these electrodes to a lamp power supply. The five plug terminals protruding from the base structure and connected respectively to the resistors and the common lead provide a further connecting structure of the resistor network to a measurement circuit in an atomic absorption spectrophotometer. The resistor network represents the atomic element of the lamp by virtue of two of the resistors, and further, represents a lamp operating current by virtue of the other two resistors. All of the plug terminals are arranged in a conventional octal plug configuration with a boss on the base structure for insuring correct electrical connection.
REFERENCES:
patent: 3670638 (1972-06-01), Lindsay
patent: 3810200 (1974-05-01), Sakaguchi et al.
patent: 3898501 (1975-08-01), Hosoya et al.
patent: 4024557 (1977-05-01), Aoyama et al.
patent: 4300834 (1981-11-01), Demers et al.
Baird brochure, Plasma/AFS Atomic Fluorescence Spectrometer, 1981.
Morley Peter
Stockdale Trevor J.
Evans F. L.
Miller Paul R.
U.S. Philips Corporation
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