EP0261722A1
Expired / Lapsed
EP
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Electric lamp
Assignee: Koninklijke Philips NV
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Filing: 1987-09-14
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Granted: —
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Expires: 2007-09-14
Abstract
Abstract The electric lamp has a lamp vessel (1) which is fixed by means of cement (6) in a lamp cap (3) of synthetic material. A metal ring (7) in contact with the cement (6) is present in the lamp cap (3), as a result of which the cement (6) can be secured by inductive heating of the metal ring (7). The lamp cap (3) has a spacer member, for example in the form of projections on the inner side of the lamp cap (3), by which the metal ring (7) is separated from the lamp cap (3).
Inventors
- 👤 Johannes Maria Antonius Van Der Heijden
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 20:59
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/50; H01J5/54; H01J5/58; H01K; H01K1/00; H01K1/42; H01K1/46
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
An electric lamp comprising: - a translucent lamp vessel in which an electric light source is arranged; - a lamp cap with an axis, whose wall mainly consists of synthetic material and which has electrical contacts on its outer side; - current-supply conductors extending from the light source to the electrical contacts at the lamp cap; - the lamp vessel being partly sunk into the lamp cap and being fixed by means of cement on the inner side thereof, and - a metal ring in contact with the cement being present in the lamp cap, characterized in that a spacer member is present, which separates the metal ring from the wall of the lamp cap.
Claim 2
Dependent Claim
115 words
An electric lamp comprising: - a translucent lamp vessel in which an electric light source is arranged; - a lamp cap with an axis, whose wall mainly consists of synthetic material and which has electrical contacts on its outer side; - current-supply conductors extending from the light source to the electrical contacts at the lamp cap; - the lamp vessel being partly sunk into the lamp cap and being fixed by means of cement on the inner side thereof, and - a metal ring in contact with the cement being present in the lamp cap, characterized in that a spacer member is present, which separates the metal ring from the wall of the lamp cap.
Claim 3
Dependent Claim
36 words
An electric lamp as claimed in Claim 1, characterized in that the spacer member comprises spread projections on the inner side of the lamp cap which separate the ring in radial directions from the lamp cap.
Claim 4
Dependent Claim
16 words
An electric lamp as claimed in Claim 2, characterized in that the projections are projecting ribs.
Claim 5
Dependent Claim
36 words
An electric lamp as claimed in Claim 3, characterized in that the spacer member comprises a projection on the inner side of the lamp cap which separates the ring from the lamp cap in axial direction.
Claim 6
Dependent Claim
32 words
An electric lamp as claimed in Claim 3 or 4, characterized in that mechanical fixing means are provided, which lock the metal ring in the lamp cap against displacement in axial directions.
Claim 7
Dependent Claim
37 words
An electric lamp as claimed in Claim 5, characterized in that the fixing means comprise barbed hooks at the metal ring and projections on the inner side of the lamp cap into which the barbed hooks engage.
References Cited (Backward Citations)
DE452751C
Cited
FR1192833A
Cited
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