Patent US2845070A successfully refreshed from Google Patents.
US3426178A
Expired / Lapsed
US
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Control apparatus
Assignee: Texas Instruments Inc
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Filing: 1966-10-31
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Granted: 1969-02-04
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Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 David J Squiers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906; G05D23/1909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
APPARATUS FOR CONTROLLING THE ENERGIZATION OF AN ELECTRICAL LOAD IN RESPONSE TO VARIATIONS IN THE RESISTANCE OF A SENSOR, SAID APPARATUS COMPRISING: A LIGHT-EMITTING, GASEOUS DISCHARGE DEVICE WHICH IS TRIGGERED INTO CONDUCTION SUBSTANTIALLY AT A FIRST VOLTAGE AND WHICH THEN CONTIUES TO CONDUCT AT A SUBSTANTIALLY LOWER VOLTAGE; CIRCUIT MEANS INCLUDING A CURRENT LIMITING RESISTANCE IN SERIES WITH SAID DEVICE FOR CONNECTING SAID DEVICE ACROSS A D.C. VOLTAGE SOURCE; CONTROLLABLE SEMICONDUCTOR CURRENT SWITCHING MEANS FOR SWITCHING THE FLOW OF CURRENT TO SAID LOAD; A PHOTOCELL RESPONSIVE TO LIGHT EMITTED FROM SAID GASEOUS DISCHARGE DEVICE FOR CONTROLLING SAND SWITCHING MEANS; A TRANSISTOR HAVING A COLLECTOR-EMITTER OUTPUT CIRCUIT CONNECTED ACROSS SAID DISCHARGE DEVICE AND A BASEEMITTER INPUT CIRCUIT HAVING A VOLTAGE THRESHOLD WHICH MUST BE EXCEEDED BEFORE SUBSTANTIAL CONDUCTION OCCURS IN SAID OUTPUT CIRCUIT;
Claim 2
Dependent Claim
132 words
APPARATUS FOR CONTROLLING THE ENERGIZATION OF AN ELECTRICAL LOAD IN RESPONSE TO VARIATIONS IN THE RESISTANCE OF A SENSOR, SAID APPARATUS COMPRISING: A LIGHT-EMITTING, GASEOUS DISCHARGE DEVICE WHICH IS TRIGGERED INTO CONDUCTION SUBSTANTIALLY AT A FIRST VOLTAGE AND WHICH THEN CONTIUES TO CONDUCT AT A SUBSTANTIALLY LOWER VOLTAGE; CIRCUIT MEANS INCLUDING A CURRENT LIMITING RESISTANCE IN SERIES WITH SAID DEVICE FOR CONNECTING SAID DEVICE ACROSS A D.C. VOLTAGE SOURCE; CONTROLLABLE SEMICONDUCTOR CURRENT SWITCHING MEANS FOR SWITCHING THE FLOW OF CURRENT TO SAID LOAD; A PHOTOCELL RESPONSIVE TO LIGHT EMITTED FROM SAID GASEOUS DISCHARGE DEVICE FOR CONTROLLING SAND SWITCHING MEANS; A TRANSISTOR HAVING A COLLECTOR-EMITTER OUTPUT CIRCUIT CONNECTED ACROSS SAID DISCHARGE DEVICE AND A BASEEMITTER INPUT CIRCUIT HAVING A VOLTAGE THRESHOLD WHICH MUST BE EXCEEDED BEFORE SUBSTANTIAL CONDUCTION OCCURS IN SAID OUTPUT CIRCUIT;
References Cited (Backward Citations)
US3042782A
Cited
US3348131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |