Electrical appliance with U-shaped lamps having filaments of different power consumption

• US 5,386,491 A
• Filed: 12/13/1993
• Issued: 01/31/1995
• Est. Priority Date: 07/08/1991
• Status: Expired due to Fees

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Mewissen, Jan A. C., Boeckx, Emiel M.
• Primary Examiner(s): Reynolds, Bruce A.
• Assistant Examiner(s): Jeffery, John A.
• Application Number:
  US08/166,653
• Time in Patent Office: 414 Days
• Field of Search: 392/418, 392/416, 392/424, 392/407, 219/405, 219/411, 219/464, 219/465, 219/466, 338/235, 313/315, 313/316
• US Class Current: 392/418
• CPC Class Codes: A47J 37/0623 Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity A47J37/0605 takes precedence
• CPC Class Codes: A47J 37/0629 with electric heating elements
• CPC Class Codes: A47J 37/0664 Accessories
• CPC Class Codes: H05B 3/0076 for cooking, e.g. in ovens lamps specially adapted for non-metallic cooking plates H05B3/742, H05B3/744

Abstract

An elctrical appliance for preparing food is provided which contains several incandescent lamps (2, 2'"'"') disposed side by side. Incandescent lamps (2, 2'"'"') for use in the appliance have a U-shaped tubular lamp vessel (4) in the first (8) and the second leg (9) of which a first (10), and, a second portion (11) respectively of an incandescent body (5) is accommodated. The first portion (10) consumes a higher power than the second portion (11 ). In the appliance the lamps (2, 2'"'"') are arranged with the second filament portions (11 ) adjacent to each other. Thereby, a more homogeneous irradiation of a carrier (3) for food is obtained.

Claims

1. An electrical appliance for preparing food, comprising:

a housing (1) in which several electric incandescent lamps (2) are accommodated side by side,

a carrier (3) for food positioned opposite and underneath the electric incandescent lamps in facing relationship therewith,

the incandescent lamps (2,2'"'"' ) each having a tubular lamp vessel (4) which is closed in a vacuumtight manner and in which a coiled incandescent body (5) is axially arranged and connected to current conductors (6) which issue to the exterior through respective end portions (7) of the lamp vessel to the exterior,

wherein the lamp vessel (4) is bent into a U-shape so as to form a first (8) and a second (9) leg positioned at a distance from one another and accommodating a first (10) and a second (11) portion, respectively, of the incandescent body (5),

the first portion (8) of the incandescent body (5) consuming a higher power than does the second portion (9), and

a first (2) and a second (2'"'"' ) incandescent lamp being arranged with their second legs next to one another.

2. An electrical appliance as claimed in claim 1, characterized in that the second portion (31) of the incandescent body (25) is subdivided into light-emitting (32) and substantially non-light-emitting sections (33).

3. An electrical appliance as claimed in claim 2, characterized in that also the first portion (50) of the incandescent body (45) is subdivided into light-emitting (54) and substantially non-light-emitting sections (55).

4. An electrical appliance as claimed in claim 3 wherein the first and the second portion of the incandescent body are interconnected by a substantially non-light-emitting section (56).

5. An electrical appliance as claimed in claim 2 wherein the first and the second portion of the incandescent body are interconnected by a substantially non-light-emitting section (56).

6. An electrical appliance as claimed in claim 1, characterized in that the first and the second portion of the incandescent body are interconnected by a substantially non-light-emitting section (56).

7. An electrical appliance as claimed in claim 1, characterized in that the end portions (7) of the first (2) and the second (2'"'"' ) incandescent lamp lie next to one another.

9. An electric incandescent lamp as claimed in claim 6, characterized in that the second portion (31) of the incandescent body (25) is subdivided into light-emitting (32) and substantially non-light-emitting (33) sections.

10. An electric incandescent lamp as claimed in claim 7, characterized in that also the first portion (50) of the incandescent body (45) is subdivided into light-emitting (54) and substantially non-light-emitting (55) sections.

11. An electric incandescent lamp as claimed in claim 10 wherein the first (50) and the second (51) portion of the incandescent body (55) are interconnected by a substantially non-light-emitting section (56).

12. An electric incandescent lamp as claimed in claim 7, characterized in that the first (50) and the second (51) portion of the incandescent body (55) are interconnected by a substantially non-light-emitting section (56).

8. An electric incandescent lamp, effective to evenly irradiate food positioned underneath and in facing relationship therewith, which lamp comprises a tubular lamp vessel (4) which is closed in a vacuumtight manner and in which a coiled incandescent body (5) is axially arranged and connected to current conductors (6) which issue to the exterior through respective end portions (7) of the lamp vessel (4),

wherein the lamp vessel (4) is bent into a U-shape so as to form a first (8) and a second (9) leg situated at a distance from one another and accommodating a first (10) and a second (11) portion, respectively, of the incandescent body (5),

the first portion (10) of the incandescent body (5) consuming a higher power than does the second portion (11), the ratio of the powers consumed by the first and second portions being between about 70:

30 and about 55;

45.