US 5,204,510 A · Radiant electric heaters

Abstract

A radiant electric heater (10) includes a layer of microporous thermal insulation (16) in a metal dish (12) and a peripheral wall (18) of ceramic fibre. A circular tungsten-halogen heating lamp (22) is supported in the dish above the insulation by its ends and by a protrusion (46) extending from the silica envelope (26) of the lamp. The protrusion extends sideways and is clamped between the insulation and the peripheral wall, and comprises a sealed exhaust tube used to evacuate and back-fill the lamp during its manufacture. Downwardly extending protrusions (120, 718) may be used instead of or in addition to sideways ones. A ridge (48) of the insulating material may also be provided, projecting up to engage with the underside of the lamp. This ridge may cooperate with the protrusion or with a clip (614) extending above the lamp to retain the lamp in position.

Claims24

Dependent claims

A radiant electric heater for cooking or heating appliances comprising:

a container;
a layer of electrical and thermal insulating material disposed in the container;
and
at least one infra-red source means having an envelope having ends and which is transmissive of infra-red radiation, said source means being supported against shock-induced displacement in said container at least in part by at least one elongate protrusion extending from said envelope intermediate the ends of said envelope, said elongate protrusion being supported by said thermal insulating material.

1 more element

Dependencies are inferred from the claim text.

Radiant electric heaters

Life of this patent

Radiant electric heaters

Life of this patent

Abstract

Claims24