US1353654A - Process of removing film from used metallic-filament electric lamps - Google Patents

Process of removing film from used metallic-filament electric lamps Download PDF

Info

Publication number
US1353654A
US1353654A US309386A US30938619A US1353654A US 1353654 A US1353654 A US 1353654A US 309386 A US309386 A US 309386A US 30938619 A US30938619 A US 30938619A US 1353654 A US1353654 A US 1353654A
Authority
US
United States
Prior art keywords
film
bulb
electric lamps
used metallic
lamps
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 - Lifetime
Application number
US309386A
Inventor
Harrison Francis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US309386A priority Critical patent/US1353654A/en
Application granted granted Critical
Publication of US1353654A publication Critical patent/US1353654A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/30—Repairing or regenerating used or defective lamps

Definitions

  • This invention is for improvements in or relating to the manufacture of incandescent electric lamps, and has particular reference to the renewing of old lamps, that is to say to a process in which lamps with broken filaments of tungsten and the like are furnished with new filaments.
  • the liquid employed for removing the film from the interior of metallic filament lamps contains an oxidizing agent, such as hydrogen peroxid.
  • liquid may be run out (for further use), and the lamp with its inner surface thoroughly wetted, as described, is allowed to stand, say for quarter-of-an-hour, until the film has been detached from the glass.
  • the bulb is then washed out with clean water to remove the material which has been detached from the inner surface of the glass. Thereafter the inside of the bulb may be washed out with a liquid which assists the drying, such as alcohol (methylated spirit), ether, or the like.
  • the lamp is then suspended in a rack for, say, twenty-four hours, with the orifice downward, and is allowed to dry slowly so that no stains or marks are left on its inner surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Description

FRANCIS HARRISON, OF LONDON, ENGLAND.
PROCESS OF No Drawing.
T 0 all whom 2' may concern:
Be it known that I, FRANCIS HARRISON, a subject of the King of England, residing at London, England, have invented certain new and useful Improvements in Processes of Removing Film from Used Metallic-Filament Electric Lamps, of which the following is a specification.
This invention is for improvements in or relating to the manufacture of incandescent electric lamps, and has particular reference to the renewing of old lamps, that is to say to a process in which lamps with broken filaments of tungsten and the like are furnished with new filaments.
It is well-known that metallic filament lamps after use frequently acquire a black film on the inner surface of the glass. This film is doubtless caused by the dissipation of material from the filament, which material adheres to the inner surface of the glass bulb, and, in many cases, causes a serious diminution of the illuminating power. Methods of renewing lamps are now in use, involving the breaking of the tip of the glass bulb to give access to the interior, and I have found it convenient to wash out the bulbs with a suitable liquid before renewing the filament.
According to this invention the liquid employed for removing the film from the interior of metallic filament lamps contains an oxidizing agent, such as hydrogen peroxid.
The following is a description by way of example of one method of carrying this invention into eifect and renewing old metallic filament lamps in which a black film has been formed on the inside surface of the glass. The tip of the glass bulb is broken off and a small circular orifice is formed at the bottom of the lamp Into the lamp is introduced a small quantity of commercial hydrogen peroXid, and the bulb is moved about so as to bring the hydro gen peroxid thoroughly into contact with all portions of the bulb bearing the film. This washing with hydrogen peroxid may be continued until the film is entirely removed, or
Specification of Letters Patent.
by glass blowing.
REMOVING FILM FROM USED IVIETALLIC-FILAMENT ELECTRIC LAMPS.
alternatively the liquid may be run out (for further use), and the lamp with its inner surface thoroughly wetted, as described, is allowed to stand, say for quarter-of-an-hour, until the film has been detached from the glass.
In either case, the bulb is then washed out with clean water to remove the material which has been detached from the inner surface of the glass. Thereafter the inside of the bulb may be washed out with a liquid which assists the drying, such as alcohol (methylated spirit), ether, or the like.
The lamp is then suspended in a rack for, say, twenty-four hours, with the orifice downward, and is allowed to dry slowly so that no stains or marks are left on its inner surface.
Vhen the lamp has been renewed as required, the bulb is exhausted and sealed up, and the renewed lamp is then ready for use free from any metallic film or other stain on 7 its inner surface.
Patented Sept. 21, 1920.
Application filed. July 8, 1919. Serial'No. 309,386.
What I claim as my nvention and desire to secure by Letters Patent is 2- 1. The process of removing the film from used metallic filament electric lamps which consists in washing the inner surface of the bulb with hydrogen peroXid.
2. The process of removing the film-from used metallic filament electric lamps which consists in forming an orifice in the bulb, washing out the interior with hydrogen permid to dislodge the film, removing the hydrogen peroxid, washing the interior of the bulb with water and slowly drying the bulb. 3. The process of removing the film from used metallic filament electric lamps which consists 'in forming an orifice in the bulb, washing out the interior with hydrogen per- OXlCl to dislodge the film, removing the hy- I drogen peroxid, washing the interior of the bulb with water, draining the bulb, washing it out with a volatile liquid, and allowing the bulb to dry slowly. I
In testimony whereof I affiX my signature.
FRANCIS HARRISON,
US309386A 1919-07-08 1919-07-08 Process of removing film from used metallic-filament electric lamps Expired - Lifetime US1353654A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US309386A US1353654A (en) 1919-07-08 1919-07-08 Process of removing film from used metallic-filament electric lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US309386A US1353654A (en) 1919-07-08 1919-07-08 Process of removing film from used metallic-filament electric lamps

Publications (1)

Publication Number Publication Date
US1353654A true US1353654A (en) 1920-09-21

Family

ID=23198020

Family Applications (1)

Application Number Title Priority Date Filing Date
US309386A Expired - Lifetime US1353654A (en) 1919-07-08 1919-07-08 Process of removing film from used metallic-filament electric lamps

Country Status (1)

Country Link
US (1) US1353654A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465228A (en) * 1946-05-07 1949-03-22 Westinghouse Electric Corp Liquid treatment of contact surfaces for copper oxide rectifiers
US2677630A (en) * 1950-07-08 1954-05-04 Freeman M Scales Can washing and sterilizing process
US2933453A (en) * 1946-05-09 1960-04-19 Jr Dana Burks Process for the decontamination of mustard gas-contaminated carbon fabric
US4406639A (en) * 1981-09-29 1983-09-27 Rca Corporation Wet processing of electrodes of a CRT to suppress afterglow

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465228A (en) * 1946-05-07 1949-03-22 Westinghouse Electric Corp Liquid treatment of contact surfaces for copper oxide rectifiers
US2933453A (en) * 1946-05-09 1960-04-19 Jr Dana Burks Process for the decontamination of mustard gas-contaminated carbon fabric
US2677630A (en) * 1950-07-08 1954-05-04 Freeman M Scales Can washing and sterilizing process
US4406639A (en) * 1981-09-29 1983-09-27 Rca Corporation Wet processing of electrodes of a CRT to suppress afterglow

Similar Documents

Publication Publication Date Title
Polanyi et al. On the mechanism of hydrolysis. The alkaline saponifications of amyl acetate
US1353654A (en) Process of removing film from used metallic-filament electric lamps
GB721201A (en) Glass-sealed semi-conductor crystal devices
CH515599A (en) Process for the production of a two-layer contact piece for high vacuum circuit breakers
US3018187A (en) Method of coating a fluorescent type tube and the coated article
US2901646A (en) High pressure mercury vapor lamp and method
US1813272A (en) Dehydration
US1915186A (en) Electrode for gaseous discharge tubes
US3410723A (en) Process for treating glass cathode-ray tube envelopes
US1708590A (en) Process for purifying coal or other gases
US2015424A (en) Process for surfacing electrodes for electrical-discharge tubes
US2053881A (en) Selenium cell manufacture
US1826387A (en) Method of deadening mercury in blue neon tubes
US1699779A (en) Process for improving tensile strength of fabric materials
Bosworth The surface tension of mercury by the maximum bubble pressure method
US1691458A (en) Method of treating liquids
US2333608A (en) Glass solution
SU406250A1 (en) METHOD OF DRAWING ON THE INTERNAL SURFACE OF THE COILS OF TUBULAR DISCHARGE LAMP PROTECTIVE
US2807539A (en) Process for refining titanium
US2200221A (en) Manufacture of fluorescent lamps
US2202327A (en) Frosted glass article and method of making it
US1974965A (en) Process for cleaning metal
US2673945A (en) Method of treating electric inlead conductors
CH207007A (en) Process for the production of gas-emitting materials for electrical circuit breakers under the action of arcing.
GB238842A (en) Process of manufacture of artificial silk and of artificial threads or filaments andapparatus therefor