GB199691A - Improvements in or relating to the manufacture of electric incandescent lamps - Google Patents
Improvements in or relating to the manufacture of electric incandescent lampsInfo
- Publication number
- GB199691A GB199691A GB24477/22A GB2447722A GB199691A GB 199691 A GB199691 A GB 199691A GB 24477/22 A GB24477/22 A GB 24477/22A GB 2447722 A GB2447722 A GB 2447722A GB 199691 A GB199691 A GB 199691A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamps
- fork
- cock
- gas
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
199,691. Handelsvennootschap onder de Firma Vogels & Co. June 26, 1922, [Convention date]. Residual gases.-In manufacturing gas-filled incandescent lamps, the bulbs are subjected to a partial evacuation by means of a " pre-vacuum " pump and are filled with an inert gas or vapour which is exhausted, this step being repeated one or more times before the lamps are finally filled with an inert gas or vapour and sealed off with a content at a pressure of 45 to 76 mm. The lamps may be raised to the usual pumping temperature and a reducing agent may be introduced before pumping takes place. The Figure shows means for closing the lamps separately on the fork before sealing off in such a way that fracture or air leakage in any one does not affect the gas filling of the others. The bulbs 2 on the fork 1 are connected by tubes 3, 4, 5 to the pump which may be shut off by the cock 6. The filling gas supply is regulated by a cock 8, and mercury may be introduced into the fork from a supply 10 for shutting off the lamps. During pumping, the cock 11 is connected to a vacuum tube of the pump so that mercury is withheld from the fork, but when the lamps are to be removed or when air leaks into any of them, the cock 11 is connected to a compressed air pipe so that mercury enters the fork and closes off each lamp separately. The Specification as open to inspection under Sect. 91 (3) (a) describes a process in which the pressure of the gas finally left in the bulb before sealing is not limited to the range of 45 to 76 mm. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL199691X | 1922-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB199691A true GB199691A (en) | 1923-10-11 |
Family
ID=19778278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24477/22A Expired GB199691A (en) | 1922-06-26 | 1922-09-09 | Improvements in or relating to the manufacture of electric incandescent lamps |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR555457A (en) |
| GB (1) | GB199691A (en) |
-
1922
- 1922-08-28 FR FR555457D patent/FR555457A/en not_active Expired
- 1922-09-09 GB GB24477/22A patent/GB199691A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR555457A (en) | 1923-06-30 |
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