CATHODE-RAY TUBE WITH LAMINATED SAFETY PANEL AND SEPARATE LIGHT-ATTENUATING LAYER

• US 3,708,622 A
• Filed: 09/27/1971
• Issued: 01/02/1973
• Est. Priority Date: 09/27/1971
• Status: Expired due to Term

• Current Assignee: RCA Corporation
• Original Assignee: George Ernest Iii Long, Gilbert James Jr. Guille, Malcolm George Jr. Brown
• Inventors: Brown, Malcolm George Jr., Guille, Gilbert James Jr., Long, George Ernest III
• Primary Examiner(s): Britton, Howard W.
• Application Number:
  US05/184,094
• Time in Patent Office: 463 Days
• Field of Search: 178/7.82 350/276SL
• US Class Current: 348/824
• CPC Class Codes: H01J 2229/875 Means substantially covering the output face, e.g. resin layers, protective panels
• CPC Class Codes: H01J 29/87 Arrangements for preventing or limiting effects of implosion of vessels or containers
• CPC Class Codes: H01J 29/896 Anti-reflection means, e.g. eliminating glare due to ambient light

Abstract

A cathode-ray tube comprising an evacuated envelope including a viewing window, and a transparent glass safety panel laminated to the window with an adhesive material. The tube includes a separate nonreflective light-attenuating layer between the adhesive material and at least one of the window and the panel.

Claims

2. The cathode-ray tube defined in claim 1 wherein said light-attenuating layer is between said adhesive material and said window.

3. a transparent glass safety panel having a surface closely spaced from said window and outside said envelope,

4. The cathode-ray tube defined in claim 1 wherein said light-attenuating layer is a neutral gray filter which attenuates the brightness of transmitted light by at least 20%.

5. an organic adhesive material adhering said laminating surface of said window to said coated surface of said safety panel.

6. The cathode-ray tube defined in claim 5 wherein said light-attenuating layer is comprised of carbon particles in an organic binder.

7. The cathode-ray tube defined in claim 5 wherein the binder for said light-attenuating layer is the primer layer normally used to promote the wetting and adherence of the laminating surfaces by said adhesive material.

8. The cathode-ray tube defined in claim 5 wherein said light-attenuating layer is comprised of light-opaque particles dispersed in organic binder.

9. The cathode-ray tube defined in claim 5 wherein said light-attenuating layer is comprised of light-opaque particles dispersed in an inorganic binder.

10. The cathode-ray tube defined in claim 5 wherein said light-attenuating layer is comprised of light-opaque particles of organic material in a binder.