Low-pressure discharge lamp with starting amalgam
AssigneePatent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
InventorFriedrich Lauter
Life of this patent
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Abstract
To retain a starting amalgam in a fluorescent lamp, a carrier body (7, 7', 37, 47), for example formed as an iron sheet-metal element of about 2.5.times.7 mm, and having a thickness of, for example, 0.2 mm, is secured to a glass element (6, 6', 36, 46) which retains current supply leads (3, 4, 3', 4') extending into the discharge vessel of the lamp, and holding the filament (5, 5') therein. The carrier body can also be a mesh or a wire; it may be melted into, or glazed-on or melted-on the glass element. This permits locating the starting amalgam close to the hottest portion of the electrode mount for the lamp for rapid supply of mercury upon firing of the lamp.
Claims14
Low-pressure discharge lamp having
- a gas-tightly sealed discharge vessel (1, 1');
- at least one electrode structure being melt-sealed to the discharge vessel, said at least one electrode structure including:
- two current supply leads (3, 4;
- 3', 4');
- a filament (5, 5') having terminal ends, mechanically and electrically connected to said current supply leads;
- and
- a glass element (6, 6', 36, 46), in which glass element the current supply leads are melt-sealed or pinch-sealed,
- an ionizing fill including mercury within said discharge vessel (1, 1'),
- and
- a starting amalgam which includes a carrier body (7, 7', 37, 47) on which a starting amalgam-forming substance is deposited,
- wherein in accordance with the invention,
- said carrier body comprises an elongated metal element (7, 7', 37, 47) which is inserted in and melted into said glass element (6, 6', 36, 46) through a minor portion of its length.
Low-pressure discharge lamp having
- a gas-tightly sealed discharge vessel (1, 1');
- at least one electrode structure being melt-sealed to the discharge vessel, said at least one electrode structure including:
- two current supply leads (3, 4;
- 3', 4');
- a filament (5, 5') having terminal ends, mechanically and electrically connected to said current supply leads;
- and
- a glass element (6, 6', 36, 46), in which glass element the current supply leads are melt-sealed or pinch-sealed,
- an ionizing fill including mercury within said discharge vessel (1, 1'),
- and
- a starting amalgam which includes a carrier body (7, 7', 37, 47) on which a starting amalgam-forming substance is deposited,
- wherein in accordance with the invention,
- said carrier body (37, 47) comprises an elongated metal element which is melted-on or glazed-on said glass element (36, 46) over a minor portion of its length.
Dependencies are inferred from the claim text.