US3243278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlled movement of flame heating means to form spiral lamp tubes
Assignee: Duro Test Corp
•
Filing: 1965-05-05
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Granted: 1966-03-29
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Expires: 1985-05-05
Abstract
No abstract record available.
Inventors
- 👤 Andrew H Olsen
- 👤 Donald G Trutner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:36
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/24; H01J9/245; H01J9/247; C; C03; C03B; C03B23/00; C03B23/04; C03B23/051
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A MACHINE OF THE TYPE DESCRIBED COMPRISING ROTATABLE MEANS FOR SUPPORTING A GLASS TUBE FOR ROTATION ON ITS AXIS, TORCH MEANS SPACED LATERALLY OF THE WALL OF THE GLASS TUBE AT A DISTANCE WHICH WILL HEAT SAID TUBE TO SOFTEN IT ALONG A LIMITED HELICAL PATH WHEN ROTATING, CARRIAGE MEANS FOR SUPPORTING AND MOVING SAID TORCH MEANS ALONG A PATH PARALLEL TO SAID TUBE, AND DRIVING MEANS INTERCONNECTING SAID ROTATABLE MEANS AND SAID CARRIAGE MEANS TO DRIVE THEM AT FIXED RELATIVE SPEEDS OF MOVEMENT SO THAT SAID TORCH MEANS WILL SOFTEN SAID TUBE, WHEN ROTATING, ALONG A LIMITED HELICAL PATH HAVING A PITCH FIXED BY SAID RELATIVE SPEEDS OF MOVEMENT TO FORM A HELICAL GROOVE HAVING THE SAME PITCH.
Claim 2
Dependent Claim
119 words
A MACHINE OF THE TYPE DESCRIBED COMPRISING ROTATABLE MEANS FOR SUPPORTING A GLASS TUBE FOR ROTATION ON ITS AXIS, TORCH MEANS SPACED LATERALLY OF THE WALL OF THE GLASS TUBE AT A DISTANCE WHICH WILL HEAT SAID TUBE TO SOFTEN IT ALONG A LIMITED HELICAL PATH WHEN ROTATING, CARRIAGE MEANS FOR SUPPORTING AND MOVING SAID TORCH MEANS ALONG A PATH PARALLEL TO SAID TUBE, AND DRIVING MEANS INTERCONNECTING SAID ROTATABLE MEANS AND SAID CARRIAGE MEANS TO DRIVE THEM AT FIXED RELATIVE SPEEDS OF MOVEMENT SO THAT SAID TORCH MEANS WILL SOFTEN SAID TUBE, WHEN ROTATING, ALONG A LIMITED HELICAL PATH HAVING A PITCH FIXED BY SAID RELATIVE SPEEDS OF MOVEMENT TO FORM A HELICAL GROOVE HAVING THE SAME PITCH.
References Cited (Backward Citations)
US3091105A
Cited
US3169657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |