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US640465A - Incandescent lamp. - Google Patents

Incandescent lamp. Download PDF

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Publication number
US640465A
US640465A US67247598A US1898672475A US640465A US 640465 A US640465 A US 640465A US 67247598 A US67247598 A US 67247598A US 1898672475 A US1898672475 A US 1898672475A US 640465 A US640465 A US 640465A
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United States
Prior art keywords
stem
anchor
wire
glass
incandescent lamp
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Expired - Lifetime
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US67247598A
Inventor
Elmer W Gillmer
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Priority to US67247598A priority Critical patent/US640465A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body
    • H01K1/24—Mounts for lamps with connections at opposite ends, e.g. for tubular lamp

Definitions

  • FIG. 1 is a side elevation of an incandescent electric lamp provided with my improved filament-anchor
  • Fig. 2 is an enlarged cross-section of the glass stem with the lower end of the anchor twisted about it.
  • My invention relates to the anchors employed for holding the filaments of incandescent lamps in position and is designed to provide an improved means for securing these anchors in place.
  • the wires forming the anchors were sealed at their lower ends in the glass of the stem, and this sealing operation was a source of considerable delay and expense in the manufacture of the lamp.
  • My invention does away with the sealing of the wire anchor; and it consists in bending the lower end of the wire around the glass stem, twisting the two parts of the wire about each other, and then bending one end down over the side of the glass stem, so as to form a brace for the anchor.
  • 2 represents an incandescent-lamp bulb containing in its base portion the glass stem 3. Sealed through this stem are the lead-in wires i it, to the inner ends of which are joined the ends of the filament 5.
  • This filament may be of any desired length or shape, but is preferably provided with intermediate coils or loops, as indicated in Fig. 1.
  • the anchor which consists of a strip of wire, the upper end of which is secured either directly to the coil of the filament or provided with an intermediate strip of platinum wire secured to the filament and to the wire anchor.
  • the lower end of this anchor-wire is bent around the glass stem a short distance below its top and then the two parts are twisted together, as shown at 7, the free end 8 of the wire being then turned or bent so as to be hooked over the top of the stem and extend downwardly on the opposite side.

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Description

No. 540,465. Patented Jan. 2, 1900. E. W. GILLMER.
INCANDESGENT LAMP.
(Application filed Mar. 4, 1898.)
ElilliIER W. GILLMER, OF WARREN, OHIO.
'EMGANDESCEZN'F LAW/l P.
SPECIFICATION forming part of Letters Patent No. 6&OA65, dated January 2, 1900.
Application filed March 4, 1898. Serial No. 672,475. (No model.)
fication, in which- Figure 1 is a side elevation of an incandescent electric lamp provided with my improved filament-anchor, and Fig. 2 is an enlarged cross-section of the glass stem with the lower end of the anchor twisted about it.
My invention relates to the anchors employed for holding the filaments of incandescent lamps in position and is designed to provide an improved means for securing these anchors in place. Heretofore the wires forming the anchors were sealed at their lower ends in the glass of the stem, and this sealing operation was a source of considerable delay and expense in the manufacture of the lamp.
My invention does away with the sealing of the wire anchor; and it consists in bending the lower end of the wire around the glass stem, twisting the two parts of the wire about each other, and then bending one end down over the side of the glass stem, so as to form a brace for the anchor.
in the drawings, 2 represents an incandescent-lamp bulb containing in its base portion the glass stem 3. Sealed through this stem are the lead-in wires i it, to the inner ends of which are joined the ends of the filament 5. This filament may be of any desired length or shape, but is preferably provided with intermediate coils or loops, as indicated in Fig. 1.
6 is the anchor, which consists of a strip of wire, the upper end of which is secured either directly to the coil of the filament or provided with an intermediate strip of platinum wire secured to the filament and to the wire anchor. The lower end of this anchor-wire is bent around the glass stem a short distance below its top and then the two parts are twisted together, as shown at 7, the free end 8 of the wire being then turned or bent so as to be hooked over the top of the stem and extend downwardly on the opposite side.
The advantages of my invention will be ap parent to those skilled in the art, since a si111- ple and effective means for securing the anohor is provided and which does away with the necessity for sealing the anchor in the glass of the stem.
I claim In an incandescent lamp, the combination with the glass stem, of a filament-anchor composed of a wire having its lower end looped around the glass stem and the two parts twisted together at one side of the stem, the free end being bent down upon the otherside of the stem to form a brace.
In testimony whereof I have hereunto set my hand.
ELMER W. GILLMER.
Witnesses:
T. H. GILLMER, WM. WALLACE.
US67247598A 1898-03-04 1898-03-04 Incandescent lamp. Expired - Lifetime US640465A (en)

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US67247598A US640465A (en) 1898-03-04 1898-03-04 Incandescent lamp.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67247598A US640465A (en) 1898-03-04 1898-03-04 Incandescent lamp.

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US640465A true US640465A (en) 1900-01-02

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US67247598A Expired - Lifetime US640465A (en) 1898-03-04 1898-03-04 Incandescent lamp.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2898135A (en) * 1954-05-25 1959-08-04 Waldes Kohinoor Inc Means for locking internal retaining rings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2898135A (en) * 1954-05-25 1959-08-04 Waldes Kohinoor Inc Means for locking internal retaining rings

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