Electrically heated multiple glazed window

Claim 2

A multiple glazed unit comprising a pair of rigid sheets disposed in parallel relation to each other, electroconductive heater means carried on the inner surface of at least one of said sheets, bus bars electrically connected to said electroconductive heater means and an electrically insulating, desiccant-containing spacer-dehydrator covering at least a portion of said bus bars and disposed between opposed marginal edge portions of said sheets.

Claim 3

The multiple glazed unit of claim 1 wherein the spacer-dehydrator comprises an electrically insulating element containing a desiccant.

Claim 4

A multiple glazed unit comprising a pair of rigid sheets disposed in parallel relation to each other, electroconductive heater means arranged to heat the inner surface of at least one of said sheets and an electrically insulating spacer-dehydrator disposed between opposed marginal edge portions of said sheets, said spacer-dehydrator comprising a desiccant material dispersed in a matrix of electrically insulating, moisture vapor transmittable material.

Claim 5

A multiple glazed unit comprising a pair of rigid sheets disposed in parallel relation to each other, electroconductive heater means arranged to heat the inner surface of at least one of said sheets and an electrically insulating spacer-dehydrator disposed between opposed marginal edge portions of said sheets, said spacer-dehydrator comprising a desiccant material dispersed in a matrix of electrically insulating, moisture vapor transmittable material.

Claim 6

The multiple glazed unit of claim 3 wherein said electrically insulating material comprises a flexible material.

Claim 7

The multiple glazed unit of claim 4 which further includes a pair of bus bars disposed between said sheets in electrical contact with said electroconductive heater means.

Claim 8

The multiple glazed unit of claim 5 wherein said bus bars are located within the same marginal edge areas occupied by portions of said spacer-dehydrator.

Claim 9

The multiple glazed unit of claim 6 wherein said portions of said spacer-dehydrator compressively support said bus bars in electrical contact with said electroconductive heater means.

Claim 10

The multiple glazed unit of claim 3 wherein said electrically insulating material comprises a block copolymer of styrene-butadiene rubber.

Claim 11

The multiple glazed unit of claim 8 wherein said desiccant material comprises a zeolite.

Claim 12

The multiple glazed unit of claim 9 wherein said zeolite comprises a crystalline metal aluminosilicate.

Claim 13

The multiple glazed unit of claim 10 which further includes a moisture-resistant adhesive material extending between said rigid sheets and across their peripheral edges.

Claim 14

The multiple glazed unit of claim 11 which further includes a moisture-resistant adhesive material extending between said spacer-dehydrator and said rigid sheets.

Claim 15

The multiple glazed unit of claim 11 which further includes a metallic frame member extending in circumscribing relation about the periphery of said unit.

Claim 16

The multiple glazed unit of claim 3 wherein said electroconductive heater means comprises an electroconductive film on the inner surface of said one of said sheets.

Claim 17

The multiple glazed unit of claim 14 wherein said electroconductive film comprises a metal film.

Claim 18

The multiple glazed unit of claim 15 wherein said metal film comprises a transparent copper film.

Claim 19

The multiple glazed unit of claim 14 wherein said electroconductive film comprises a metal oxide film.

Claim 20

The multiple glazed unit of claim 17 wherein said metal oxide film comprises a transparent tin oxide film.

Claim 21

The multiple glazed unit of claim 3 wherein said rigid sheets are glass.

Claim 22

The multiple glazed unit of claim 19 wherein at least one of said glass sheets has solar control properties.

Claim 23

The multiple glazed unit of claim 1 wherein said spacer-dehydrator compressively supports said bus bars in electrical contact with said electroconductive heater means.