US4497989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric mat switch
Assignee: Individual
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Filing: 1984-01-20
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Granted: 1985-02-05
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Expires: 2004-01-20
Abstract
Abstract An electric mat switch including a pair of outer wear layers, a pair of inner moisture barrier layers between the wear layers and a separator layer between the moisture barrier layers; all of which layers are substantially congruent and sealed together about their peripheral margins as by heat sealing, radio frequency welding or the like; and a pair of conductor layers each located between the separator layer and a respective barrier layer and spaced inwardly from the sealed margins; the separator layer being resiliently compressible and openly configured for flexure therethrough of the conductor layers into contact with each other.
Inventors
- 👤 Norman K. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:47
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/02; H01H3/14; H01H3/141; H01H2003/147
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
An electric mat switch comprising a pair of facing spaced generally congruent flexible outer wear layers fabricated of weldable material, a pair of facing spaced flexible inner moisture barrier layers between and generally congruent to said outer wear layers and fabricated of weldable material, a pair of facing spaced flexible conductor layers between said moisture barrier layers generally similar to and smaller than said moisture barrier layers and spaced inwardly from the margins thereof, and a resiliently compressible apertured separator layer of weldable material interposed between said conductor layers and generally congruent to said moisture barrier and wear layers; the overlying margins of said wear layers, moisture barrier layers and separator layer being welded together to locate and retain each conductor layer between the separator layer and a respective moisture barrier layer.
Claim 2
Dependent Claim
132 words
An electric mat switch comprising a pair of facing spaced generally congruent flexible outer wear layers fabricated of weldable material, a pair of facing spaced flexible inner moisture barrier layers between and generally congruent to said outer wear layers and fabricated of weldable material, a pair of facing spaced flexible conductor layers between said moisture barrier layers generally similar to and smaller than said moisture barrier layers and spaced inwardly from the margins thereof, and a resiliently compressible apertured separator layer of weldable material interposed between said conductor layers and generally congruent to said moisture barrier and wear layers; the overlying margins of said wear layers, moisture barrier layers and separator layer being welded together to locate and retain each conductor layer between the separator layer and a respective moisture barrier layer.
Claim 3
Dependent Claim
22 words
An electric mat switch according to claim 1, said wear layers, moisture barrier layers and separator layer being radio frequency welded together.
Claim 4
Dependent Claim
38 words
An electric mat switch according to claim 1, in combination with a bulking layer generally congruent to and laminated with each conductor layer on the nonfacing side thereof, to resist deformation of said conductor layers under concentrated impact.
Claim 5
Dependent Claim
16 words
An electric mat switch according to claim 3, said bulking layers being fabricated of fiberglass cloth.
Claim 6
Dependent Claim
28 words
An electric mat switch according to claim 1, said wear layers, moisture barrier layers and separator layer being fabricated of polyvinyl chloride for simultaneous welding of said layers.
Claim 7
Dependent Claim
37 words
An electric mat switch according to claim 1, one of said wear layers having external ribs for traction, and the other of said wear layers having internal ribs for enhanced conductor layer contact through said separator layer.
Claim 8
Dependent Claim
22 words
An electric mat switch according to claim 6, said internal ribs being relatively smooth to prevent permanent deformation of said conductor layers.
Claim 9
Dependent Claim
30 words
An electric mat switch according to claim 1, said separator layer being fabricated of porous foam and being compressed in the weld to remove its pores and seal said margins.
Claim 10
Dependent Claim
22 words
An electric mat switch according to claim 8, said wear layers, moisture barrier layers and separator layer being radio frequency welded together.
Claim 11
Dependent Claim
28 words
An electric mat switch according to claim 8, said wear layers, moisture barrier layers and separator layer being fabricated of polyvinyl chloride for simultaneous welding of said layers.
Claim 12
Dependent Claim
46 words
An electric mat switch according to claim 8, one of said wear layers having external ribs for traction, and the other of said wear layers having relatively smooth internal ribs for enhanced conductor layer contact through said separator layer without permanent deformation of said conductor layers.
Claim 13
Dependent Claim
22 words
An electric mat switch according to claim 6, said external and internal ribs extending longitudinally of each other, to facilitate mat flexure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |