Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
197 words
A high pressure metal vapor discharge lamp comprising: an outer bulb (11) having a seal portion (lla); an arc tube (1) enclosed within said outer bulb (11), and having at least a pair of electrodes (2A, 2B) and containing at least a light emitting material and a rare gas; a first pair of lead wires (5A, 5B), one end of the first pair of lead wires being connected to the electrodes (2A, 2B) in the arc tube (1) and the other end of the first lead wires being mounted at the seal portion (lla) of the outer bulb; a pre-heater (6) disposed within the outer bulb, having a heating element (7) and an electrical insulating material covering the heating element (7), and facing the arc tube (1) for heating the arc tube; and a second pair of lead wires (9A, 9B) connected to the heating element of pre-heater (6), the portion of the said pairs of lead wires (9A, 9B) which are within the outer bulb (11) being surrounded by a heat-resisting insulator (10, 10a, 12) and end portions of the second pair of lead wires being mounted at the seal portion (lla) of outer bulb (11).
Claim 2
Dependent Claim
197 words
A high pressure metal vapor discharge lamp comprising: an outer bulb (11) having a seal portion (lla); an arc tube (1) enclosed within said outer bulb (11), and having at least a pair of electrodes (2A, 2B) and containing at least a light emitting material and a rare gas; a first pair of lead wires (5A, 5B), one end of the first pair of lead wires being connected to the electrodes (2A, 2B) in the arc tube (1) and the other end of the first lead wires being mounted at the seal portion (lla) of the outer bulb; a pre-heater (6) disposed within the outer bulb, having a heating element (7) and an electrical insulating material covering the heating element (7), and facing the arc tube (1) for heating the arc tube; and a second pair of lead wires (9A, 9B) connected to the heating element of pre-heater (6), the portion of the said pairs of lead wires (9A, 9B) which are within the outer bulb (11) being surrounded by a heat-resisting insulator (10, 10a, 12) and end portions of the second pair of lead wires being mounted at the seal portion (lla) of outer bulb (11).
Claim 3
Dependent Claim
33 words
A lamp according to claim 1, wherein at least one lead wire of the first pair of lead wires (5A, 5B) which are within the outer bulb is covered with the insulator (13).
Claim 4
Dependent Claim
22 words
A lamp according to claim 1 or 2, wherein the insulating material (8) which covers the heating element (7) is a ceramic.
Claim 5
Dependent Claim
73 words
A lamp according to claim 1, 2 or 3 wherein: a glass tube (10) surrounds the portion of the second pair of lead wires (9A, 9B) which are exposed in the outer bulb (11), the heat-resistor insulator is packed in at least the internal gap at one end (10a) of the glass tube and the other end of said glass tube (10) is mounted at the seal portion (11) of the outer bulb.
Claim 6
Dependent Claim
28 words
A lamp according to anyone of claims 1 to 4, wherein on the surface of the pre-heater (6) facing the arc tube, is covered with a carbon coating.
Claim 7
Dependent Claim
18 words
A lamp according to anyone of claims 1 to 5, wherein said pre-heater is formed in a V-shape.
Claim 8
Dependent Claim
18 words
A lamp according to anyone of claims 1 to 5, wherein said pre-heater is formed in a U-shape.