Means for mounting membrane switches to cathode ray tubes

• US 4,427,861 A
• Filed: 12/23/1982
• Issued: 01/24/1984
• Est. Priority Date: 12/23/1982
• Status: Expired due to Fees

• Current Assignee: AMP Limited
• Original Assignee: AMP Limited
• Inventors: Stillie, Donald G.
• Primary Examiner(s): Shepperd, John W.
• Application Number:
  US06/452,586
• Time in Patent Office: 397 Days
• Field of Search: 340/712, 340/365 UL, 340/365 C, 340/725, 340/815.2, 200/159 B, 200/5 A, 200/294
• 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 2223/026 Hook and loop
• CPC Class Codes: H01H 2231/004 CRT

Abstract

A membrane switch having mounting means for mounting the switch to a cathode ray tube (CRT) is disclosed. The mounting means is comprised of extensions protruding from the perimeter of the membrane switch, each extension having thereon a patch of a coupled fastening assembly. The fastening assembly is comprised of two separable parts, the inner surfaces of which have a very large number of closely spaced hooking elements of the hook and loop type that engage with each other when the two parts are pressed together. When the switch is aligned against the CRT, the extensions wrap around the perimeter of the CRT. The outer surface of the fastening assembly can then be attached to the sides of the CRT. The mounting means disclosed herein holds the switch securely to the face of the CRT and at the same time permits easy realignment if the switch becomes distorted during use.

Claims

1. A membrane switch having mounting means for mounting the switch to a cathode ray tube, the switch comprised of two layers of substantially transparent film having internal surfaces that are separated from each other by spacing means, the spacing means having openings therein constituting switch sites, the internal surfaces of each layer having conductors thereon, the conductors crossing and being normally spaced from each other at the switch sites, the mounting means being characterized in that:

a plurality of extensions protrude from the perimeter of at least one of the layers of film,

a patch of a coupled fastening assembly is attached to each extension,

the fastening assembly is comprised of two separable parts, the inner surfaces of which have a very large number of closely spaced hooking elements of the hook and loop type that engage with each other when the two parts are pressed together, whereby,

when the switch is aligned against the CRT, the extensions wrap around the perimeter of the CRT enabling the outer surfaces of the coupled fastening assemblies to be attached to one or more sides of the CRT.

2. The mounting means as set forth in claim 1 wherein the coupled fastening assembly is adhesively attached to the layer extensions and the sides of the CRT.

3. The mounting means as set forth in claim 1 wherein the extensions have openings therein.

4. The mounting means as set forth in claim 3 wherein the coupled fastening assembly is attached to the extension by means of a snap-in plate, the plate having one side with a boss sized to snap into the openings in the extension and a second side for attaching to the coupled fastening assembly.

5. The switch having mounting means as set forth in claim 1 wherein the conductors are electrodeposited hairline conductors.

6. A membrane switch having mounting means as set forth in claim 5 mounted on a CRT.

7. The switch having mounting means as set forth in claim 1 wherein the conductors are lines of conductive ink.

8. A membrane switch having mounting means as set forth in claim 7 mounted on a CRT.

9. A membrane switch having a mounting means kit comprised of

a membrane switch having two layers of substantially transparent film, with at least one layer having a plurality of extensions protruding from one or more sides of its perimeter, the internal surfaces of the layers being separated from each other by spacing means, the spacing means having openings therein constituting switch sites, the internal surfaces of each layer having conductors thereon, the conductors crossing and being normally spaced from each other at the switch sites, and

a plurality of patches of coupled fastening assemblies comprised of two separable parts, the inner surfaces of which have a very large number of closely spaced hooking elements of the hook and loop type that engage with each other when the two parts are pressed together, one outer surface of the assembly being used to attach to each extension and the second outer surface being used to attach the extension to the sides of the CRT.

10. The membrane switch having mounting means as set forth in claim 9 wherein the coupled fastening assembly is adhesively attached to the layer extensions and the sides of the CRT.

11. The membrane switch having mounting means as set forth in claim 9 wherein the extensions have openings therein.

12. The membrane switch having mounting means as set forth in claim 9 wherein the coupled fastening assembly is attached to the extension by means of a snap-in plate, the plate having one side with a boss sized to snap into the openings in the extension and a second side for attaching to the coupled fastening assembly.

13. The membrane switch having mounting means as set forth in claim 9 wherein the conductors are electrodeposited hairline conductors.

14. The membrane switch having mounting means as set forth in claim 9 wherein the conductors are lines of conductive ink.