US3307070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power control system
Assignee: Hunt Electronics Co
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Filing: 1963-11-07
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Granted: 1967-02-28
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Expires: 1983-11-07
Abstract
No abstract record available.
Inventors
- 👤 Jearld L Hutson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:19
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/36; H05B41/38; H05B41/39; H05B41/392; H05B41/3921; H05B41/3924; Y; Y10; Y10S; Y10S315/00; Y10S315/04; Y10S315/07
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
A POWER CONTROL CIRCUIT THAT COMPRISES: (A) FIRST DIODE SWITCHING MEANS CAPABLE OF BEING EXCITED FROM A NORMALLY HIGH IMPEDANCE STATE TO A LOW IMPEDANCE STATE; (B) MEANS CONNECTING SAID FIRST DIODE SWITCHING MEANS IN A SERIES WITH THE LOAD TO BE CONTROLLED AND A SOURCE OF ALTERNATING CURRENT SUPPLY VOLTAGE; (C) MEANS FOR EXCITING SAID FIRST DIODE SWITCHING MEANS TO THE LOW IMPEDANCE STATE AT A DESIRED TIME IN THE CYCLE OF THE APPLIED ALTERNATING CURRENT SUPPLY VOLTAGE TO THEREBY CONTROL THE POWER APPLIED TO THE LOAD; (D) A RESISTIVE ELEMENT: (E) A SECOND DIODE SWITCHING MEANS CAPABLE OF BEING EXCITED FROM A NORMALLY HIGH IMPEDANCE STATE TO A LOW IMPEDANCE STATE; AND (F) MEANS CONNECTING SAID SECOND DIODE SWITCHING MEANS IN SERIES WITH SAID RESISTIVE ELEMENT ACROSS SAID LOAD FOR SUPPLYING HOLDING CURRENT TO SAID FIRST DIODE SWITCHING MEANS WHEN SAID FIRST AND SECOND DIODE SWITCHING MEANS ARE SWITCHED TO THE LOW IMPEDANCE STATE.
Claim 2
Dependent Claim
156 words
A POWER CONTROL CIRCUIT THAT COMPRISES: (A) FIRST DIODE SWITCHING MEANS CAPABLE OF BEING EXCITED FROM A NORMALLY HIGH IMPEDANCE STATE TO A LOW IMPEDANCE STATE; (B) MEANS CONNECTING SAID FIRST DIODE SWITCHING MEANS IN A SERIES WITH THE LOAD TO BE CONTROLLED AND A SOURCE OF ALTERNATING CURRENT SUPPLY VOLTAGE; (C) MEANS FOR EXCITING SAID FIRST DIODE SWITCHING MEANS TO THE LOW IMPEDANCE STATE AT A DESIRED TIME IN THE CYCLE OF THE APPLIED ALTERNATING CURRENT SUPPLY VOLTAGE TO THEREBY CONTROL THE POWER APPLIED TO THE LOAD; (D) A RESISTIVE ELEMENT: (E) A SECOND DIODE SWITCHING MEANS CAPABLE OF BEING EXCITED FROM A NORMALLY HIGH IMPEDANCE STATE TO A LOW IMPEDANCE STATE; AND (F) MEANS CONNECTING SAID SECOND DIODE SWITCHING MEANS IN SERIES WITH SAID RESISTIVE ELEMENT ACROSS SAID LOAD FOR SUPPLYING HOLDING CURRENT TO SAID FIRST DIODE SWITCHING MEANS WHEN SAID FIRST AND SECOND DIODE SWITCHING MEANS ARE SWITCHED TO THE LOW IMPEDANCE STATE.
Claim 3
Independent Claim
167 words
A SYSTEM FOR DIMMING FLUORESCENT LIGHTS THAT COMPRISES: (1) A BALLAST HAVING A PRIMARY WINDING AND A START WINDING; (2) MEANS CONNECTING SAID PRIMARY WINDING IN SERIES WITH A SOURCE OF ALTERNATING CURRENT SUPPLY VOLTAGE; (3) FIRST DIODE SWITCHING MEANS CAPABLE OF BEING EXCITED FROM A NORMALLY HIGH IMPEDANCE STATE TO A LOW IMPEDANCE STATE; (4) A LOAD COMPRISING SAID START WINDING AND A FLUORESCENT TUBE CONNECTED IN SERIES; (5) MEANS CONNECTING SAID FIRST DIODE SWITCHING MEANS IN SERIES WITH SAID LOAD AND SAID SOURCE OF ALTERNATING CURRENT SUPPLY VOLTAGE; (6) MEANS CONNECTING A RESISTIVE ELEMENT AND A SECOND DIODE SWITCHING MEANS CAPABLE OF BEING SWITCHED FROM A HIGH IMPEDANCE STATE TO A LOW IMPEDANCE STATE IN PARALLEL WITH SAID LOAD; AND (7) MEANS FOR EXCITING SAID FIRST DIODE SWITCHING MEANS AND SAID SECOND DIODE SWITCHING MEANS TO SAID LOW IMPEDANCE STATE AT A DESIRED TIME IN EACH HALF CYCLE OF THE APPLIED ALTERNATING CURRENT SUPPLY VOLTAGE TO THEREBY CONTROL THE FLOW OF CURRENT THROUGH SAID LOAD.
Claim 4
Independent Claim
167 words
A SYSTEM FOR DIMMING FLUORESCENT LIGHTS THAT COMPRISES: (1) A BALLAST HAVING A PRIMARY WINDING AND A START WINDING; (2) MEANS CONNECTING SAID PRIMARY WINDING IN SERIES WITH A SOURCE OF ALTERNATING CURRENT SUPPLY VOLTAGE; (3) FIRST DIODE SWITCHING MEANS CAPABLE OF BEING EXCITED FROM A NORMALLY HIGH IMPEDANCE STATE TO A LOW IMPEDANCE STATE; (4) A LOAD COMPRISING SAID START WINDING AND A FLUORESCENT TUBE CONNECTED IN SERIES; (5) MEANS CONNECTING SAID FIRST DIODE SWITCHING MEANS IN SERIES WITH SAID LOAD AND SAID SOURCE OF ALTERNATING CURRENT SUPPLY VOLTAGE; (6) MEANS CONNECTING A RESISTIVE ELEMENT AND A SECOND DIODE SWITCHING MEANS CAPABLE OF BEING SWITCHED FROM A HIGH IMPEDANCE STATE TO A LOW IMPEDANCE STATE IN PARALLEL WITH SAID LOAD; AND (7) MEANS FOR EXCITING SAID FIRST DIODE SWITCHING MEANS AND SAID SECOND DIODE SWITCHING MEANS TO SAID LOW IMPEDANCE STATE AT A DESIRED TIME IN EACH HALF CYCLE OF THE APPLIED ALTERNATING CURRENT SUPPLY VOLTAGE TO THEREBY CONTROL THE FLOW OF CURRENT THROUGH SAID LOAD.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |