KR880010471A - Electric incandescent lamps and blown glass bulbs suitable for use therein - Google Patents

Abstract

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Description

Electric incandescent lamps and inauguration glass bulbs suitable for use therein

As this is a public information case, the full text was not included.

1 is a side elevational view of a first embodiment of a lamp with a lamp container in an axial cross section;

2 to 5 show a blown glass bulb coated with a mirror in an axial cross section suitable for use in the second embodiment of the lamp.

6 shows a change in the bulb of 2 to 5 degrees in the axial cross section.

7 is a partial axial side elevation of another embodiment of a lamp.

Claims (10)

Symmetric axis, Maximum diameter intersecting the symmetric axis, A free end of the wall portion which overlies the lamp cap having a neck-shaped first wall portion and an electrical contact behind the largest diameter, A second wall portion which is concave internally, Internally concave third wall portion An internally concave fourth wall portion disposed facing the lamp cap in front of the maximum diameter, Helically wound filaments arranged around an axis of symmetry in a plane intersecting at said axis, Means for holding the deployed filaments, An electric incandescent lamp having a blown glass container sealed by a mill vacuum method with a current supply conductor interconnecting a filament with a contact portion on a lamp cap, wherein in the -axis cross-section, the second wall portion is in accordance with an arc of a circle; Bent and extending transversely between the neck-shaped wall portion and the maximum diameter, the bend center being disposed at the front of the maximum diameter on the other side of the axis of symmetry, and in the -axis cross section, the third wall portion is curved along the arc of the circle; Extending axially in front of the maximum diameter, the bend radius being arranged on the other side of the axis of symmetry behind the maximum diameter, the wall part gradually coalescing with the second wall part in the vicinity of the maximum diameter, and the filament arranged near the maximum diameter Electric incandescent lamp, characterized in that. The electric incandescent lamp according to claim 1, wherein in the area far from the axis of symmetry in the axial section, the fourth wall portion is actually curved along the arc of the circle, and the center of curvature is disposed in front of the filament in the vicinity of the axis of symmetry. 2. The electric incandescent lamp as claimed in claim 1, wherein the necked wall portion has a reduced width portion in the region in which this portion belongs to the second wall portion. 4. The electric incandescent lamp as claimed in claim 1 or 3, wherein the second wall portion and the third wall portion are mirror coated. 5. The electric incandescent lamp according to claim 1 or 4, wherein the second wall portion has a bent structure in the region near the neck-shaped wall portion. 6. An electric incandescent lamp as claimed in claim 4 or 5, wherein the annular screen is arranged axially therewithin the lamp vessel, the screen being partly radially surrounded by the third wall part and partly the fourth wall part. lamp. 7. The electric incandescent lamp as claimed in claim 6, wherein the screen is narrowed towards the fourth wall portion. 8. An electric incandescent lamp as claimed in claim 6 or 7, wherein the annular screen is supported by a spring on the wall of the lamp vessel. 9. The electric incandescent lamp of claim 8, wherein said spring engages with a reduced width portion in the necked wall portion. Blown glass bulbs suitable for use in the electric incandescent lamp claimed in any one of the preceding claims. ※ Note: It is to be disclosed based on the initial application.