US694220A - Former for filaments for incandescent electric lamps. - Google Patents

Former for filaments for incandescent electric lamps. Download PDF

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Publication number
US694220A
US694220A US8772301A US1901087723A US694220A US 694220 A US694220 A US 694220A US 8772301 A US8772301 A US 8772301A US 1901087723 A US1901087723 A US 1901087723A US 694220 A US694220 A US 694220A
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Prior art keywords
former
filaments
electric lamps
incandescent electric
improved
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Expired - Lifetime
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US8772301A
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Glenn Cannon Webster
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/67005—Apparatus not specifically provided for elsewhere
    • H01L21/67011—Apparatus for manufacture or treatment
    • H01L21/67098—Apparatus for thermal treatment
    • H01L21/67109—Apparatus for thermal treatment mainly by convection
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B31/00—Diffusion or doping processes for single crystals or homogeneous polycrystalline material with defined structure; Apparatus therefor
    • C30B31/06—Diffusion or doping processes for single crystals or homogeneous polycrystalline material with defined structure; Apparatus therefor by contacting with diffusion material in the gaseous state
    • C30B31/14—Substrate holders or susceptors

Definitions

  • FIG. 3 is a perspective view of the top portion of the former.
  • Fig. at is a horizontal section on the line 4 4 of Fig. 1.
  • Fig. 5 is a horizontal section on the line 5 5 of Fig. 1.
  • Fig. 6 is a side view of the former with a series of filaments applied and secured thereto in the manner required for thebaking operation.
  • the former A is composed of powdered carbon compressed to the requisite degree and forming a hard solid cylinder.
  • the upper portion of the body A of the former is provided with two adjacent spiral grooves a'and whose lower portions extend lengthwise of the former on the opposite sides thereof, as shown in Figs. 1 and 5.
  • the grooves a and a are connected, as shown at a-that is to say, by a passageway between two projections or ears a which are arranged diagonally opposite each other.
  • An improved former for filaments of incandescent lamps having two opposite spiral grooves leading downward from its upper end, substantially as shown and described.
  • An improved former for filaments of incandescent electric lamps the same being shaped as described, and having two similar I00 spiral grooves in its upper portion and two opposite straight grooves in its lower portion, which grooves are joined with the spiral ones, as shown and described.
  • the improved former for the purpose specified, consisting of a cylindrical body having a passage-way at the top and two spiral grooves leading downward therefrom on opposite sides as shown and described.
  • the improved former for the purpose specified, consisting of a cylindrical carbon body having a passage-way at the top and two spiral grooves leading downward therefrom on opposite sides and terminating in straight portions parallel to the central axis of the former, as shown and described.

Description

No. 694,220. Patented Feb. 25, I902.
G. C. WEBSTER. FORMER FOR FILAMENTS FOR INCANDESGENT ELECTRIC LAMPS.
(Application filed Dec. so, 1901.)
(No Model.)
//v VENTOR Glam. Cit aisle 1 A TTORNEYS UNITED STATES PATENT OFFICE.
GLENN CANNON WEBSTER, OF WARREN, OHIO.
FORMER FOR FILAMENTS FO-R INCA'NDESCENT ELECTRIC LAMPS.
SPECIFICATION forming part of Letters Patent No. 694,220, dated February 25, 1902. Application filed December 30, 1901. Serial No. 87,728. (No model.)
To (0 whom it may concern:
Be it known that I, GLENN CANNON WEB- STER, a citizen of the United States, residing at Warren, in the county of Trumbull and State of Ohio, have made certain new and useful Improvements in Formers for Filaments for Incandescent Electric Lamps, of which the following is a specification.
I have invented and produced an improved form of double spiral filament for incandescent electric lamps; and my presentinvention is an improved former or shaping implement upon which the filaments are wound and secured preliminary to the baking process to which they are necessarily subjected.
The details of construction are as hereinafter described and claimed, and illustrated inthe accompanying drawings, in which- Figures 1 and 2 are different side views of my improved former. .Fig. 3 is a perspective view of the top portion of the former. Fig. at is a horizontal section on the line 4 4 of Fig. 1. Fig. 5 is a horizontal section on the line 5 5 of Fig. 1. Fig. 6 is a side view of the former with a series of filaments applied and secured thereto in the manner required for thebaking operation.
The former A is composed of powdered carbon compressed to the requisite degree and forming a hard solid cylinder. The upper portion of the body A of the former is provided with two adjacent spiral grooves a'and whose lower portions extend lengthwise of the former on the opposite sides thereof, as shown in Figs. 1 and 5. At the top of the former A the grooves a and a are connected, as shown at a-that is to say, by a passageway between two projections or ears a which are arranged diagonally opposite each other. The function of these ears is to hold the carbon filaments w in place when applied therelaid with their central portions in the space a between the cars a and a and are wound spirally around the body of the former, so as 55 its attached filaments, is ready for the baking 6o operationthat is to say, to be placed in a bed of powdered graphite and to be subjected for a period of thirty to forty hours to a high degree of heat, so as to be thoroughly baked.
In such baking process the binding-thread is burned off, and when the former, with the filaments clinging thereto, is removed from the graphite and duly cooled the filaments are carefully detached and separated and are nearly in the shape required for use in lamp- 7o bulbs. It will be observed that the shorter cars a are beveled on their outer sides. This con= struction and the relative arrangement of the longer ears a have considerable utility in function-that is to say, the longer ears serve to hold in place any number of filaments that the grooves a and a can accommodate, and the smaller cars a supplement this function by allowing the spirally-formed filaments to be conveniently detached after baking, since it is apparent the top bend of the filaments will pass easily over the bevels of the ears a if the bundle of filaments be turned or rotated around the body of the former.
While I prefer and have described the former as cylindrical, I do not restrict myself to such shape, since it may be made elliptical in cross-section and still serve the purpose.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-
1. An improved former for filaments of incandescent lamps, the same having two opposite spiral grooves leading downward from its upper end, substantially as shown and described.
2. An improved former for filaments of incandescent electric lamps, the same being shaped as described, and having two similar I00 spiral grooves in its upper portion and two opposite straight grooves in its lower portion, which grooves are joined with the spiral ones, as shown and described.
3. The improved former for the purpose specified, consisting ofa cylindrical body having a passage-way at the top and two spiral grooves leading downward therefrom on opposite sides as shown and described.
4. The improved former for the purpose specified, consisting of a cylindrical carbon body having a passage-way at the top and two spiral grooves leading downward therefrom on opposite sides and terminating in straight portions parallel to the central axis of the former, as shown and described.
5. The improved former for the purpose specified, consisting of a round body having opposite ears at the top which are separated by a space suitable to receive a bundle of carbon filaments, and two similar spiral grooves leading downward on opposite sides and ter-= minating in straight portions which are also 7
US8772301A 1901-12-30 1901-12-30 Former for filaments for incandescent electric lamps. Expired - Lifetime US694220A (en)

Priority Applications (1)

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US8772301A US694220A (en) 1901-12-30 1901-12-30 Former for filaments for incandescent electric lamps.

Applications Claiming Priority (1)

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US8772301A US694220A (en) 1901-12-30 1901-12-30 Former for filaments for incandescent electric lamps.

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US694220A true US694220A (en) 1902-02-25

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2602191A (en) * 1951-05-08 1952-07-08 Fred L Joy Mold mandrel
US3117344A (en) * 1961-12-15 1964-01-14 Carmer Ind Inc Mold for making plastic coil with straight leads
US10817842B2 (en) 2013-08-30 2020-10-27 Drumwave Inc. Systems and methods for providing a collective post

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2602191A (en) * 1951-05-08 1952-07-08 Fred L Joy Mold mandrel
US3117344A (en) * 1961-12-15 1964-01-14 Carmer Ind Inc Mold for making plastic coil with straight leads
US10817842B2 (en) 2013-08-30 2020-10-27 Drumwave Inc. Systems and methods for providing a collective post

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