US2675734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrochemical analysis system
Assignee: —
•
Filing: —
•
Granted: 1954-04-20
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Expires: 1971-04-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:13
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/30; G01J3/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN A SPECTROCHEMICAL ANALYSIS SYSTEM, THE COMBINATION OF: A PHOTOTUBE ADAPTED TO RECEIVE LIGHT FROM A SPECTRAL LINE, A CONDENSER, MEANS FOR CONNECTING SAID PHOTOTUBE TO SAID CONDENSER TO CHARGE SAID CONDENSER DURING A CHARGE INTEGRATION PERIOD, A BRIDGE THERMIONIC AMPLIFIER INCLUDING IN ONE ARM AN AMPLIFIER TUBE HAVING AN INPUT CONTROL GRID AND INCLUDING IN AN APPOSED ARM A SECOND AMPLIFIER TUBE HAVING A CONTROL GRID, AMPLIFIER OUTPUT LEADS CONNECTED ACROSS SAID BRIDGE AMPLIFIER, A RECORDER CONNECTED TO SAID OUTPUT LEADS INCLUDING AN INDICATOR MOVABLE ALONG A SCALE HAVING A ZERO POSITION, AUTOMATIC ZERO CONTROL MEANS CONNECTED TO THE CONTROL GRID OF SAID SECOND AMPLIFIER TUBE, SAID ZERO CONTROL MEANS BEING OPERATIVE IN CONSONANCE WITH FLUCTUATIONS OF SAID INDICATORY OF SAID RECORDER FROM ITS ZERO POSITION TO CHANGE THE VOLTAGE ON SAID CONTROL GRID IN A MANNER TO
Claim 2
Dependent Claim
139 words
IN A SPECTROCHEMICAL ANALYSIS SYSTEM, THE COMBINATION OF: A PHOTOTUBE ADAPTED TO RECEIVE LIGHT FROM A SPECTRAL LINE, A CONDENSER, MEANS FOR CONNECTING SAID PHOTOTUBE TO SAID CONDENSER TO CHARGE SAID CONDENSER DURING A CHARGE INTEGRATION PERIOD, A BRIDGE THERMIONIC AMPLIFIER INCLUDING IN ONE ARM AN AMPLIFIER TUBE HAVING AN INPUT CONTROL GRID AND INCLUDING IN AN APPOSED ARM A SECOND AMPLIFIER TUBE HAVING A CONTROL GRID, AMPLIFIER OUTPUT LEADS CONNECTED ACROSS SAID BRIDGE AMPLIFIER, A RECORDER CONNECTED TO SAID OUTPUT LEADS INCLUDING AN INDICATOR MOVABLE ALONG A SCALE HAVING A ZERO POSITION, AUTOMATIC ZERO CONTROL MEANS CONNECTED TO THE CONTROL GRID OF SAID SECOND AMPLIFIER TUBE, SAID ZERO CONTROL MEANS BEING OPERATIVE IN CONSONANCE WITH FLUCTUATIONS OF SAID INDICATORY OF SAID RECORDER FROM ITS ZERO POSITION TO CHANGE THE VOLTAGE ON SAID CONTROL GRID IN A MANNER TO
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |