US3845347A — Electric display tube and envelope structure ther…

Claim 1

Independent Claim 193 words

An electric display tube comprising internal display electrode means, means forming a set of external terminals for extending within said tube with their internal ends respectively connected to support said internal electrode means in spaced relation to the interior surfaces of said tube, a metal base in the form of a flat plate provided with perforations through which said terminals extend, electric insulators rigidly sealing said terminals in said perforations, a metal cap enclosing and spaced from said internal display electrode means said cap having a top opening the inner periphery of which is formed with a reentrant flange, a transparent sheet sealed in said opening and supported on said reentrant flange, a peripheral outwardly extending flange formed on said cap, said outwardly extending flange spaced from said window a distance to assure spacing said internal display electrode means from the inner surface of said window, means forming a continuous peripheral bond between said outwardly extending flange and said base, and a partially evacuated atmosphere within the interior of said display tube, atmospheric pressure tending to urge said transparent sheet and said metal base in sealing relation against the respective flanges adjacent thereto.

Claim 2

Dependent Claim 193 words

An electric display tube comprising internal display electrode means, means forming a set of external terminals for extending within said tube with their internal ends respectively connected to support said internal electrode means in spaced relation to the interior surfaces of said tube, a metal base in the form of a flat plate provided with perforations through which said terminals extend, electric insulators rigidly sealing said terminals in said perforations, a metal cap enclosing and spaced from said internal display electrode means said cap having a top opening the inner periphery of which is formed with a reentrant flange, a transparent sheet sealed in said opening and supported on said reentrant flange, a peripheral outwardly extending flange formed on said cap, said outwardly extending flange spaced from said window a distance to assure spacing said internal display electrode means from the inner surface of said window, means forming a continuous peripheral bond between said outwardly extending flange and said base, and a partially evacuated atmosphere within the interior of said display tube, atmospheric pressure tending to urge said transparent sheet and said metal base in sealing relation against the respective flanges adjacent thereto.

Claim 3

Dependent Claim 168 words

A metal envelope electric display tube comprising a metallic cap formed with a top wall with sidewalls extending therefrom and terminating in an external peripheral flange, and a metallic bottom plate conductively sealed against said flange; said top wall having an opening formed with an internal peripheral flange depressed below the outer surface of said top wall, and a transparent plate in said opening supported on and sealed to said internal peripheral flange; said bottom plate having a set of perforations therein, a set of terminals extending respectively through said perforations, and dielectric seals in each of said perforations rigidly supporting said terminals which pass through said dielectric seals; display electrode means on the ends of said terminals within said envelope spaced from the internal surfaces of said metallic cap, said transparent plate and said metallic plate; and a gaseous atmosphere within said tube below atmospheric pressure, atmospheric pressure tending to urge said transparent plate and said bottom plate in sealing relation against the respective flanges adjacent thereto.

Claim 4

Dependent Claim 168 words

A metal envelope electric display tube comprising a metallic cap formed with a top wall with sidewalls extending therefrom and terminating in an external peripheral flange, and a metallic bottom plate conductively sealed against said flange; said top wall having an opening formed with an internal peripheral flange depressed below the outer surface of said top wall, and a transparent plate in said opening supported on and sealed to said internal peripheral flange; said bottom plate having a set of perforations therein, a set of terminals extending respectively through said perforations, and dielectric seals in each of said perforations rigidly supporting said terminals which pass through said dielectric seals; display electrode means on the ends of said terminals within said envelope spaced from the internal surfaces of said metallic cap, said transparent plate and said metallic plate; and a gaseous atmosphere within said tube below atmospheric pressure, atmospheric pressure tending to urge said transparent plate and said bottom plate in sealing relation against the respective flanges adjacent thereto.

Claim 5

Dependent Claim 17 words

The electric display tube according to claim 2 and including a ground connection for said metallic envelope.

Claim 6

Dependent Claim 18 words

The electric display tube according to claim 3 in which said display electrode means comprise fluorescent electrode means.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1977-10-28	1978-04-29	1978-10-29	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1981-10-28	1982-04-29	1982-10-29	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1985-10-28	1986-04-29	1986-10-29	$7700.00	Window Closed / Lapsed

Electric display tube and envelope structure therefor

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag