Patent US3582978A successfully refreshed from Google Patents.
US3582978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rivet-shaped electrical lead-through contact
Assignee: Tektronix Inc
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Filing: 1969-08-28
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Granted: 1971-06-01
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Expires: 1989-08-28
Abstract
Abstract An electrical lead-through contact for a cathode-ray tube is described which is in the shape of a hollow metal rivet having an enlarged head portion closing one end thereof and an open end portion which is bent outward over a washer to mechanically fasten the rivet within an aperture in a ceramic envelope. A hermetic seal is then formed by heat fusion of glass previously provided around such rivet either as a glaze coating or as a compressed glass frit washer. The contact may be provided with a conductive coating over an oxide surface on such head portion to electrically connect it to a wallband electrode formed by another portion of such coating on the inner surface of the envelope. In another embodiment, a projection extends from such head portion for attachment to a lead conductor connected to another electrode within the tube envelope.
Inventors
- 👤 Ronald O Petersen
- 👤 Jerry E Turnbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:24
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/92; H01J29/925; Y; Y10; Y10S; Y10S439/00; Y10S439/933; Y10S439/935
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
An electrical lead-through contact apparatus comprising: an envelope of insulating material having an aperture through the envelope wall; an electrical contact member of metal having an enlarged head portion at one end and a side portion extending from said head portion, said contact member being supported with said side portion in said aperture and with said head portion extending over the edge of the aperture and engaging the inner side of the envelope wall to accurately position the contact member; and seal means for sealing at least the side portion of said contact member to the envelope to form a metal to insulator seal hermetically sealing said aperture and providing an electrical lead-through envelope wall.
Claim 2
Dependent Claim
115 words
An electrical lead-through contact apparatus comprising: an envelope of insulating material having an aperture through the envelope wall; an electrical contact member of metal having an enlarged head portion at one end and a side portion extending from said head portion, said contact member being supported with said side portion in said aperture and with said head portion extending over the edge of the aperture and engaging the inner side of the envelope wall to accurately position the contact member; and seal means for sealing at least the side portion of said contact member to the envelope to form a metal to insulator seal hermetically sealing said aperture and providing an electrical lead-through envelope wall.
Claim 3
Dependent Claim
73 words
A contact apparatus in accordance with claim 1 in which the contact member is a socket member in the form of a hollow rivet with the enlarged head portion closing one end and having an open end portion with a tubular side portion therebetween said open end being bent outward on the outer side of the envelope wall to mechanically hold the contact in position within the aperture when the seal is formed.
Claim 4
Dependent Claim
24 words
A contact apparatus in accordance with claim 1 in which the seal is formed of an insulating material different than that of the envelope.
Claim 5
Dependent Claim
34 words
A contact apparatus in accordance with claim 3 in which the envelope includes a wall portion of crystalline ceramic material having the aperture provided therethrough and in which the seal is formed of glass.
Claim 6
Dependent Claim
40 words
A contact apparatus in accordance with claim 4 in which the envelope is the evacuated envelope of a cathode ray tube and the ceramic wall portion is sealed to a glass faceplate portion supporting the phosphor screen of said tube.
Claim 7
Dependent Claim
60 words
A contact apparatus in accordance with claim 1 in whIch the metal contact member has an oxide surface layer and a coating of noble metal is provided over the oxided surface on the enlarged end of said contact member and over a portion of the inner surface of the envelope to make contact with an electrode provided within said envelope.
Claim 8
Dependent Claim
35 words
A contact apparatus in accordance with claim 6 in which the electrode is an anode of a cathode ray tube, said anode being provided as a conductive coating on the inner surface of the envelope.
Claim 9
Dependent Claim
44 words
A contact apparatus in accordance with claim 2 provided in a cathode ray tube in which the rivet has a projection extending inside the envelope from the head portion and such projection is connected by a lead conductor to an electrode in said envelope.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |