US3858078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal halide discharge lamp having an arched arc tube
Assignee: GTE Sylvania Inc
•
Filing: 1973-07-09
•
Granted: 1974-12-31
•
Expires: 1993-07-09
Abstract
Abstract The arc tube of a metal halide arc discharge lamp has electrodes at each end thereof and contains a fill including mercury and a metal halide. The arc tube has an arch shape so that, during operation of the lamp in a horizontal position, the arc discharge is substantially equidistant from the walls of the arc tube.
Inventors
- 👤 F Koury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:01
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/82; H01J61/827
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
A metal halide arc discharge lamp comprising: an outer envelope; an arched arc tube, having electrodes at each end thereof, disposed within said envelope, said arc tube containing a fill including mercury, metal halide and an inert gas, the arched shape of said arc tube being such that during normal horizontal operation with the arch of the arc tube uppermost, the arc discharge does not extend to the walls of the arc tube and said discharge is substantially equidistant from the walls of the arc tube; and means to energize said arc tube.
Claim 2
Dependent Claim
93 words
A metal halide arc discharge lamp comprising: an outer envelope; an arched arc tube, having electrodes at each end thereof, disposed within said envelope, said arc tube containing a fill including mercury, metal halide and an inert gas, the arched shape of said arc tube being such that during normal horizontal operation with the arch of the arc tube uppermost, the arc discharge does not extend to the walls of the arc tube and said discharge is substantially equidistant from the walls of the arc tube; and means to energize said arc tube.
Claim 3
Dependent Claim
72 words
A metal halide arc discharge lamp comprising: an outer envelope having a positioning type base at one end thereof; an arched arc tube, having electrodes at each end thereof, disposed within said envelope, the arched shape of said arc tube being such that during normal horizontal operation of the lamp with the arch of the arc tube uppermost, the arc discharge is spaced from and is substantially centered within the arc tube.
Claim 4
Dependent Claim
72 words
A metal halide arc discharge lamp comprising: an outer envelope having a positioning type base at one end thereof; an arched arc tube, having electrodes at each end thereof, disposed within said envelope, the arched shape of said arc tube being such that during normal horizontal operation of the lamp with the arch of the arc tube uppermost, the arc discharge is spaced from and is substantially centered within the arc tube.
Claim 5
Dependent Claim
89 words
A metal halide arc discharge lamp comprising: an outer envelope having a positioning type base at one end thereof; an arched arc tube, having electrodes at each end thereof, disposed within said envelope, the arched shape of said arc tube being such that during normal horizontal operation of the lamp with the arch of the arc tube uppermost, the arc discharge does not extend to the walls of the arc tube and the space between said discharge and said walls is substantially uniform around the circumference of said dischargE.
Claim 6
Dependent Claim
89 words
A metal halide arc discharge lamp comprising: an outer envelope having a positioning type base at one end thereof; an arched arc tube, having electrodes at each end thereof, disposed within said envelope, the arched shape of said arc tube being such that during normal horizontal operation of the lamp with the arch of the arc tube uppermost, the arc discharge does not extend to the walls of the arc tube and the space between said discharge and said walls is substantially uniform around the circumference of said dischargE.
Claim 7
Dependent Claim
98 words
In a general illumination metal halide arc discharge lamp of the type wherein the arc discharge is bowed upward by convection currents within the arc tube during normal lamp operation, the improvement which comprises an envelope having a base at one end thereof and an arched arc tube, having electrodes at each end thereof, disposed within said envelope, the arched shape of said arc tube being such that during normal horizontal operation with the arch of the arc tube uppermost, the arc discharge does not extend to the walls of the arc tube and is substantially centered therein.
Claim 8
Dependent Claim
98 words
In a general illumination metal halide arc discharge lamp of the type wherein the arc discharge is bowed upward by convection currents within the arc tube during normal lamp operation, the improvement which comprises an envelope having a base at one end thereof and an arched arc tube, having electrodes at each end thereof, disposed within said envelope, the arched shape of said arc tube being such that during normal horizontal operation with the arch of the arc tube uppermost, the arc discharge does not extend to the walls of the arc tube and is substantially centered therein.
Claim 9
Dependent Claim
23 words
The lamp of claim 4 wherein the angle formed by the two ends of the arc tube is between about 130* and 160*.
Claim 10
Dependent Claim
28 words
The lamp of claim 4 wherein, during normal lamp operation, the core of the arc discharge substantially coincides with the longitudinal center line of the arched arc tube.
References Cited (Backward Citations)
US2190657A
Cited
US2179606A
Cited
US2298239A
Cited
US2965790A
Cited
GB1003971A
Cited
US3753019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |