US3581146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ballast for a plurality of parallel gaseous discharges
Assignee: INDUSTRIAL LASER Inc
•
Filing: 1969-07-29
•
Granted: 1971-05-25
•
Expires: 1989-07-29
Abstract
Abstract A plurality of gaseous discharge tubes connected to a common power supply has a vacuum tube connected in series with each gaseous discharge tube to provide ballast for the individual gaseous discharge tubes, a water-cooled, heavy duty anode is provided with a plurality of cathodes positioned adjacent the anode. A discharge tube is connected in each of the cathode circuits. Negative feedback is used to limit the current through each discharge tube. Variable feedback resistors permit balancing of the discharge paths.
Inventors
- 👤 Alan E Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:16
CPC Classifications
H; H05; H05B; H05B41/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
91 words
A device for providing ballast in a plurality of parallel discharges, comprising: a DC power supply; an evacuated envelope; and anode within said envelope; means for connecting said anode to a B+ voltage from said power supply; a plurality of cathode elements positioned within said envelope in discharge relation to said anode; a gaseous discharge element connected in the cathode circuit of each of said cathodes; means for limiting the current in the discharges between said cathodes and said anode to thereby provide individual ballast for each of said gaseous discharges.
Claim 2
Independent Claim
91 words
A device for providing ballast in a plurality of parallel discharges, comprising: a DC power supply; an evacuated envelope; and anode within said envelope; means for connecting said anode to a B+ voltage from said power supply; a plurality of cathode elements positioned within said envelope in discharge relation to said anode; a gaseous discharge element connected in the cathode circuit of each of said cathodes; means for limiting the current in the discharges between said cathodes and said anode to thereby provide individual ballast for each of said gaseous discharges.
Claim 3
Dependent Claim
25 words
The device as recited in claim 1 wherein each of said cathodes has a filament circuit including means for controlling the temperature of the filament.
Claim 4
Dependent Claim
25 words
The device as recited in claim 2 wherein said anode includes a channel therein; means for providing a coolant to the channel in said anode.
Claim 5
Dependent Claim
34 words
The device as recited in claim 1 including a grid positioned adjacent each of said cathodes; means for providing negative feedback to the grid to limit the current flowing through the gaseous discharge tube.
Claim 6
Dependent Claim
22 words
The device as recited in claim 4 wherein the grids substantially surround the cathodes to thereby provide shielding for the separate cathodes.
Claim 7
Dependent Claim
25 words
The device as recited in claim 5 wherein said anode includes a channel therein; means for providing a coolant to the channel in said anode.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |