Patent US3821500A successfully refreshed from Google Patents.
US3821500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor mat with electrical switch
Assignee: Marc Manufacturing Inc
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Filing: 1973-02-26
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Granted: 1974-06-28
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Expires: 1993-02-26
Abstract
Abstract A floor mat which produces an electrical signal upon a force being applied, as by being stepped upon, by the force flexing a portion of a pair of spaced apart metal plates into engagement to complete a circuit and in which the plates are embedded within and adhered to a thick cured polyurethane covering material.
Inventors
- 👤 B Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:51
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/02; H01H3/14; H01H3/141; H01H2003/147
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
112 words
A floor mat for providing an electrical signal upon a weight being applied thereto comprising a pair of somewhat resilient metal plates, means resiliently maintaining the plates contiguous and slightly spaced apart, an electrical connector to each plate and a cured polyurethane one piece covering material completely enclosing said plates to form a mat slightly larger than the plates by said covering material being molded to the desired shape with the plates being positioned therein, said covering material being cohesive and adhering to the plates throughout their contacting surfaces and in which the adhesion of the covering material through the surfaces of the plates essentially approximates the cohesion of the covering material.
Claim 2
Dependent Claim
112 words
A floor mat for providing an electrical signal upon a weight being applied thereto comprising a pair of somewhat resilient metal plates, means resiliently maintaining the plates contiguous and slightly spaced apart, an electrical connector to each plate and a cured polyurethane one piece covering material completely enclosing said plates to form a mat slightly larger than the plates by said covering material being molded to the desired shape with the plates being positioned therein, said covering material being cohesive and adhering to the plates throughout their contacting surfaces and in which the adhesion of the covering material through the surfaces of the plates essentially approximates the cohesion of the covering material.
Claim 3
Dependent Claim
92 words
A floor mat for providing an electrical signal upon a weight being applied thereto comprising a pair of somewhat resilient metal plates, means resiliently maintaining the plates contiguous and slightly apart, an electrical connector to each plate and a cured polyurethane covering material completely enclosing said plates to form a mat slightly larger than the plates, a film adhered to the top surface of the top plate forming a design and in which a polyurethane covering is essentially colorless and adheres to the film whereby said design is visable through the film.
Claim 4
Dependent Claim
92 words
A floor mat for providing an electrical signal upon a weight being applied thereto comprising a pair of somewhat resilient metal plates, means resiliently maintaining the plates contiguous and slightly apart, an electrical connector to each plate and a cured polyurethane covering material completely enclosing said plates to form a mat slightly larger than the plates, a film adhered to the top surface of the top plate forming a design and in which a polyurethane covering is essentially colorless and adheres to the film whereby said design is visable through the film.
Claim 5
Dependent Claim
31 words
The invention as defined in claim 2 in which at least the bottom surface of the periphery of the covering material extending beyond the plates is covered by an opaque film.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |