Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

Heat Accumulators

Flat-front-panel-CRT-bulb-pre-stressed-prior-to-final-evacuation-and-method-of-making-same

Archery bowstring release device

This invention relates to a release device by which an archer may draw and quickly release the ...

Exhaust stack damper control

OF THE INVENTION Referring to the drawing, FIG. 1, a heat exchanger is schematically illustrated ...

Temperature actuated multiple function fluid control valve

The present temperature responsive fluid flow control valve regulates two fluid flow systems and ...

See through fireplace

The present invention is directed to providing a suitably insulated and properly ventilated, ...

Missile projecting aid attachment for archer's bow

The present invention is a removable attachment which can be affixed to an archer's bow for use in ...

Propulsion device for spherical objects having an oscillating support frame providing a programmed discharge of said objects

Summarized briefly, the improvement comprising the present invention is incorporated in a ...

Slingshot-like tether toy

The present invention is an improvement over that disclosed in my co-pending application referred ...

Launcher for flying discs

What is claimed is: 1. A launcher for flying discs of the type having an integral circumferential ...

Crossbow stock

According to the present invention, there is provided a crossbow stock having a stirrup mounted on ...

Device for cleaning, widening and repairing wells of drinking water and irrigation water

The prior state of art involves some defects and drawbacks. First of all, besides the fact that ...

Flat front panel CRT bulb pre-stressed prior to final evacuation and method of making same

Details

Inventors: Dougherty, Lawrence W.;
Assignee: Zenith Electronics Corporation (Glenview, IL)
Primary Examiner: Ramsey; Kenneth J.
Assistant Examiner:
Attorney, Agent or Firm: Norris; Roland W.

A CRT bulb that has been preloaded to counter the atmospheric load placed on the seal area of an evacuated and sealed CRT is disclosed along with methods of constructing the bulb. The front panel is simply supported on the funnel and deflected inwardly during affixation of the panel to the funnel to form the bulb. When the deflection load is removed from the affixed panel, the resultant strain energy imparted to the bulb seal area offsets at least some of the atmosphericly induced strain on the sealed CRT. The bulb has a more evenly balanced stress distribution between the front panel and the funnel seal area than previous flat panel CRTs, enabling the use of thinner front panels and seal land.

DETAILED DESCRIPTION Having thus described the invention, what is claimed is: 1.
A method of manufacturing a CRT having a flat face panel which results in reduced panel-to-funnel seal area stress, comprising, in order: a) abutting a flat CRT front panel to a CRT funnel without rigid connection therebetween; b) deflecting the panel inwardly of the funnel without substantially stressing the funnel seal land; and, c) rigidly connecting the panel to the funnel at the seal land while the panel is deflected to produce a CRT bulb in which the funnel seal area is pre-stressed counter to atmospheric loading.
2.
The method of claim 1 including: deflecting the panel a significant percentage of the total panel deflection distance occurring under atmospheric loading of the evacuated CRT.
3.
The method of claim 1 including: placing a cement between the panel and the funnel, the cement having both rigid and nonrigid phases 4.
The method of claim 3 including deflecting the panel without stressing the cement.
5.
The method of claim 3 wherein the cement is a devitrifying solder glass.
6.
The method of claim 1 including: deflecting the panel by application of force to its exterior surface.
7.
The method of claim 1 including deflecting the panel by means of gravity loading the panel.
8.
The method of claim 1 including deflecting the panel by means of spring loading the panel.
9.
The method of claim 1 including deflecting the panel by means of vacuum loading the panel.
10.
The method of claim 1 including deflecting the panel by thermal means.
11.
The method of claim 10 including causing a thermal gradient in the panel.
12.
A method of processing a CRT bulb for reduced seal area stress when evacuated, comprising: a) applying frit to the funnel-to-panel seal; b) assembling the funnel and panel; c) loading the panel axially inwardly while devitrifying the frit; such that upon removal of the loading, the seal area experiences a counteractive loading effective to offset at least a portion of the atmospheric loading on the bulb when evacuated and sealed

Related patents

	CRT bulb having a front panel with a higher CTE than its funnel What is claimed is: 1. In a cathode ray tube bulb made by sealing a glass front panel to a funnel by cementing said panel and said funnel together with solder glass at ...
	Automatic shut-off and alarm for stove heating unit The present invention is characterized in that a burner plate is formed with a series of declining U-shaped grooves for water flow use. The water flows through a ...
	Developing roller apparatus for reproduction machines What is claimed is: 1. A developing roller for use in the development of heat-sensitive copy sheets in a reproduction machine, said roller comprising: a hollow, thin-...
	Fixing device, fixing method, and recording apparatus An object of the present invention is to provide a fixing device having a small-sized heat roller having a long life, and which prevents image slippage from occurring, ...
	Induction heated steam generating system In accordance with the present invention a novel and useful steam generating system is herein provided. The steam generating system includes a first container which is ...
	Liquid level control What is claimed is: 1. A liquid level control system for liquid containment vessels and the like having heating means associated therewith for heating the liquid ...
	Electric oven This invention relates to an improved electric oven. It is the primary object of the present invention to provide an electric oven which can be easily dismantled and ...
	Sighting device for archery bows I claim: 1. A sighting device for archery bows comprising an elongated body adapted to be attached intermediate its ends to one side of a bow, first and second arms ...
	Aiming device for archery bows and other objects Referring to FIG. 1 the aiming device incorporating the principles of this invention is generally indicated at 10 and is shown to be detachably secured to the central ...
	Arrow holder of DRAWINGS With reference to FIG. 1, an arrow holder is shown generally as 10. Arrow holder 10 comprises holding arm 12 secured by pivot pin 14 to mounting bracket 16. ...

0.034
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved