Lamp with protective tube

Details Lamp with protective tube Lamp with protective tube

Filed on

1995-03-30

Date issued

1997-02-04

Examiner

Lazarus, Ira S.

Patent Class

Illumination

SubClass

Light source and modifier

SubSubClass

With sealing means or artificial atmosphere

Other Related Categories

362222, 362424, 362376, F21V 3102

Type

Patent

Status

active

Patent number

055990908

Description

ABSTRACT:
Lamp with protective tube comprising a transparent lamp tube, a bulb installed therein, and multi-part cap members tightly sealing off the lamp tube at both ends. The lamp is characterized in that both cap members (20, 20') have inner and outer compression rings (22, 22'; 23, 23') with facing thrust cones (22c, 23c), between which a sealing ring (24, 24') of rubber elastic material is clamped, the inner and outer compression rings (22, 22'; 23, 23') and the sealing ring (24, 24') being located inside the lamp tube (10). The outer compression ring (22, 22') being part of an actuating ring (22a, 22a') located outside the lamp tube (10). The inner compression ring (23, 23') is moveable toward the outer compression ring (22, 22') by means of an adjusting ring (21, 21'), also located outside the lamp tube (10), and a tensioning mechanism (21d, 23d), actuateable by the adjusting ring.

REFERENCES:
patent: 3331958 (1967-07-01), Adler
patent: 4088882 (1978-05-01), Lewis
patent: 4268894 (1981-05-01), Bartunek et al.
patent: 4580200 (1986-04-01), Hess et al.
patent: 5301093 (1994-04-01), Baggio

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