Control panel

• US 6,137,072 A
• Filed: 05/26/1999
• Issued: 10/24/2000
• Est. Priority Date: 05/26/1999
• Status: Expired due to Fees

• Current Assignee: The Erie Ceramic Arts Company, LLC (Superior Metal Products Incorporated)
• Original Assignee: Ferro Corporation (Vibrantz Technologies, Inc.)
• Inventors: Laneve, William P., Deutschlander, G. James, Giardina, Richard N., Martter, Robert H., Sundberg, Craig C.
• Primary Examiner(s): FRIEDHOFER, MICHAEL A
• Application Number:
  US09/320,083
• Time in Patent Office: 517 Days
• Field of Search: 200/5 A, 200/512, 200/514, 200/341, 200/511, 200/406, 200/517, 200/343, 341/22, 341/34, 341/176, 400/472, 400/490, 400/491, 400/491.2
• US Class Current: 200/512
• CPC Class Codes: H01H 13/702 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
• CPC Class Codes: H01H 13/703 characterised by spacers between contact carrying layers
• CPC Class Codes: H01H 2209/014 composed of different layers; Lubricant in between
• CPC Class Codes: H01H 2209/026 metallic
• CPC Class Codes: H01H 2209/07 metallic
• CPC Class Codes: H01H 2211/026 without separate element
• CPC Class Codes: H05K 1/053 the metal substrate being covered by an inorganic insulating layer
• CPC Class Codes: H05K 5/0017 with operator interface units

Abstract

A touch control panel for use in controlling an electrical device such as a washer, dryer, stove, microwave or related piece of electrical equipment. In a preferred embodiment, the touch control panel comprises an outer panel formed of flexible aluminum. The outer panel includes an outer and an inner surface. The inner surface of the aluminum panel includes a first circuit formed along at least a portion of the surface. The control panel also includes an inner support panel comprising a porcelain enamel metal substrate. The porcelain enamel metal substrate affords a highly durable and rigid degree of support to the control panel. The support panel has an inner surface which is spaced from and disposed substantially parallel to the inner surface of the outer panel. The inner surface of the metal substrate has formed along at least a portion thereof a second circuit. Upon application of tactile pressure upon the outer surface of the outer panel, the first circuit contacts the second circuit. Upon release of the tactile pressure, the first circuit disengages contact with the circuit.

Claims

1. An electrical touch control panel comprising:

an outer panel of flexible aluminum having an inner and outer surface and a first circuit;

an inner support panel comprising a porcelain enamel coated metal substrate, said support panel having an inner surface which is spaced from and disposed substantially parallel to the inner surface of said outer panel, said inner surface of said metal substrate having formed along at least a portion thereof a second circuit such that upon application of tactile pressure upon the outer surface of said outer panel, said first circuit contacts said second circuit and upon release of the tactile pressure, said first circuit disengages contact with said second circuit;

a glass encapsulant layer formed along the inner surface of said inner support panel.

2. A control panel as set forth in claim 1 wherein said metal substrate comprises low carbon steel.

3. A control panel as set forth in claim 1 wherein said inner support panel and said outer panel are spaced a distance of from about 0.010 inches to about 0.100 inches.

4. A control panel as set forth in claim 1 wherein said outer panel includes no circuit traces and thus by itself comprises said first circuit.

5. A control panel as set forth in claim 1 wherein said first circuit of said outer support panel includes a circuit trace formed along at least a portion of said inner surface of said outer support panel.

6. A control panel as set forth in claim 1 wherein said second circuit comprises a cermet thick film.

7. A control panel as set forth in claim 1 wherein said inner panel and said outer support panel are spaced a distance of from about 0.020 inches to about 0.050 inches.

8. A control panel as set forth in claim 1 wherein said first circuit comprises a layer of insulative polymeric film having formed thereon a conductive polymer thick film.

9. A control panel as set forth in claim 1 wherein said first circuit comprises a layer of conductive polymer thick film.

10. A control panel as set forth in claim 1 wherein the outer surface of said outer panel is decorated.