Patent US4425476A successfully refreshed from Google Patents.
US4425476A
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Progressively fused ceramic seals between spaced members such as a terminal pin and a ferrule
Assignee: PACIFIC COAST TECHNOLOGIES Inc A WA CORP
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Filing: 1981-04-06
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Granted: 1984-01-10
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Expires: 2001-04-06
Abstract
Abstract A ferrule is provided with an opening extending through the ferrule and a terminal pin is disposed in the opening in spaced relationship to the ferrule. A plurality of insulating members are disposed on the terminal pin in the opening in a stacked relationship. Each of the insulating members is fused to the terminal pin and the ferrule. Each of the insulating members in the stack has a higher temperature of fusion than the preceding members in the stack. The insulating members in the stack are progressively fused to the ferrule and the terminal pin by the application of progressive temperatures to the terminal pin, the ferrule and the insulating members. The insulating members having the highest temperature of fusion are provided with properties of being able to withstand large forces without any degradation of the fusion with the terminal pin and the ferrule. The insulating members of the reduced temperatures of fusion are able to withstand other types of shock such as sudden changes in temperature. The terminal pin extends through the ferrule to a position external to the ferrule. An additional insulating member is disposed on the ferrule in hermetically sealed relationship with the terminal pin and the ferrule at the external position.
Inventors
- 👤 James C. Kyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:46
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26; H01B17/30; H01B17/303; H01B17/305; Y; Y10; Y10T; Y10T403/00; Y10T403/21; Y10T403/213; Y10T403/217
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
91 words
In combination, a ferrule, a terminal pin disposed in spaced relationship to the ferrule, and a plurality of insulating members disposed in stacked relationship between the terminal pin and the ferrule and made from ceramic materials having partially amorphous and partially polycrystalline properties, each of the insulating members being fused to adjacent ones of the terminal pin, the ferrule and the other insulating members, each of the progressive insulating members in the stack having a progressive temperature of fusion in accordance with the positioning of the insulating member in the stack.
Claim 2
Dependent Claim
91 words
In combination, a ferrule, a terminal pin disposed in spaced relationship to the ferrule, and a plurality of insulating members disposed in stacked relationship between the terminal pin and the ferrule and made from ceramic materials having partially amorphous and partially polycrystalline properties, each of the insulating members being fused to adjacent ones of the terminal pin, the ferrule and the other insulating members, each of the progressive insulating members in the stack having a progressive temperature of fusion in accordance with the positioning of the insulating member in the stack.
Claim 3
Dependent Claim
16 words
The combination set forth in claim 1 wherein each of the insulating members is relatively non-viscous.
Claim 4
Dependent Claim
35 words
The combination set forth in claim 1 wherein each of the progressive insulating members in the stack is formed from the same materials but in different proportions to provide for the progressive temperatures of fusion.
Claim 5
Dependent Claim
55 words
The combination set forth in claim 3 wherein the ferrule has an opening and the terminal pin extends through the opening in the ferrule to a position external to the ferrule and wherein an insulating material is fused to the ferrule and the terminal pin at the external position and has a high electrical resistivity.
Claim 6
Dependent Claim
127 words
In combination, a ferrule, a terminal pin disposed in spaced relationship to the ferrule, and a plurality of insulating members disposed between the terminal pin and the ferrule in a stacked relationship, each of the insulating members constituting a ceramic material having partially amorphous and partially polycrystalline properties, each of the insulating members being fused to adjacent ones of the terminal pin, the ferrule and the other insulating members, each of the insulating members in the stack having a higher temperature of fusion than the preceding members in the stack, the insulating members in the stack being progressively fused to the ferrule and the terminal pin and the other insulating members by the application of progressive temperatures to the terminal pin, the ferrule and the insulating members.
Claim 7
Dependent Claim
127 words
In combination, a ferrule, a terminal pin disposed in spaced relationship to the ferrule, and a plurality of insulating members disposed between the terminal pin and the ferrule in a stacked relationship, each of the insulating members constituting a ceramic material having partially amorphous and partially polycrystalline properties, each of the insulating members being fused to adjacent ones of the terminal pin, the ferrule and the other insulating members, each of the insulating members in the stack having a higher temperature of fusion than the preceding members in the stack, the insulating members in the stack being progressively fused to the ferrule and the terminal pin and the other insulating members by the application of progressive temperatures to the terminal pin, the ferrule and the insulating members.
Claim 8
Dependent Claim
42 words
The combination set forth in claim 5 wherein each of the insulating members in the plurality is formed from the same materials as the other insulating members in the plurality but in different proportions relative to the other members in the plurality.
Claim 9
Dependent Claim
23 words
The combination set forth in claim 6 wherein each of the insulating members is hermetically sealed to the terminal pin and the ferrule.
Claim 10
Dependent Claim
186 words
In combination, a ferrule having at least one opening extending through the ferrule, a terminal pin extending through the opening in the ferrule in spaced relationship to the ferrule, and a plurality of insulating members disposed on the terminal pin in the opening in a stacked relationship, each of the insulating members being fused to at least a particular one of the terminal pin and the ferrule, and the other insulating members, each of the insulating members in the stack having a higher temperature of fusion than the preceding members in the stack, the insulating members in the stack being progressively fused to the ferrule and the terminal pin and the other insulating members by the application of progressive temperatures to the terminal pin, the ferrule and the insulating members, each of the insulating members in the plurality being formed from the same materials as the other insulating members in the plurality but in different proportions relative to the other members in the plurality, and an additional insulating member disposed on the ferrule and hermetically sealing the terminal pin and the ferrule at the external position.
Claim 11
Dependent Claim
186 words
In combination, a ferrule having at least one opening extending through the ferrule, a terminal pin extending through the opening in the ferrule in spaced relationship to the ferrule, and a plurality of insulating members disposed on the terminal pin in the opening in a stacked relationship, each of the insulating members being fused to at least a particular one of the terminal pin and the ferrule, and the other insulating members, each of the insulating members in the stack having a higher temperature of fusion than the preceding members in the stack, the insulating members in the stack being progressively fused to the ferrule and the terminal pin and the other insulating members by the application of progressive temperatures to the terminal pin, the ferrule and the insulating members, each of the insulating members in the plurality being formed from the same materials as the other insulating members in the plurality but in different proportions relative to the other members in the plurality, and an additional insulating member disposed on the ferrule and hermetically sealing the terminal pin and the ferrule at the external position.
Claim 12
Dependent Claim
26 words
The combination set forth in claim 8 where the ferrule is provided with a flange and the additional insulating member is hermetically sealed to the flange.
Claim 13
Dependent Claim
72 words
In combination, a ferrule, a terminal pin disposed in spaced relationship to the ferrule, and insulating means constituting a ceramic with partially amorphous and partially polycrystalline characteristics and disposed between the terminal pin and the ferrule and hermetically sealed to at least a particular one of the terminal pin and the ferrule, the insulating means having a progressively increased temperature of fusion to the ferrule and the terminal pin at progressive positions.
Claim 14
Dependent Claim
72 words
In combination, a ferrule, a terminal pin disposed in spaced relationship to the ferrule, and insulating means constituting a ceramic with partially amorphous and partially polycrystalline characteristics and disposed between the terminal pin and the ferrule and hermetically sealed to at least a particular one of the terminal pin and the ferrule, the insulating means having a progressively increased temperature of fusion to the ferrule and the terminal pin at progressive positions.
Claim 15
Dependent Claim
34 words
The combination set forth in claim 10 wherein the insulating means is made from the same combination of materials at the progressive positions but with different proportions of such materials at the progressive positions.
Claim 16
Dependent Claim
14 words
In combination set forth in claim 10 wherein the insulating means is primarily polycrystalline.
Claim 17
Dependent Claim
124 words
In combination, a ferrule having at least one opening extending through the ferrule, a terminal pin extending through the opening in spaced relationship to the ferrule, and insulating means disposed in the opening and hermetically sealed to at least a particular one of the terminal pin and the ferrule, the insulating means having a progressively increased temperature of fusion to the ferrule and the terminal pin with progressive positions along the opening, the insulating means being made from the same combination of materials at the progressive positions along the opening but with different proportions of such materials at the progressive positions, and an insulating member disposed on the ferrule in hermetically sealed relationship with the terminal pin and the ferrule at the external position.
Claim 18
Dependent Claim
124 words
In combination, a ferrule having at least one opening extending through the ferrule, a terminal pin extending through the opening in spaced relationship to the ferrule, and insulating means disposed in the opening and hermetically sealed to at least a particular one of the terminal pin and the ferrule, the insulating means having a progressively increased temperature of fusion to the ferrule and the terminal pin with progressive positions along the opening, the insulating means being made from the same combination of materials at the progressive positions along the opening but with different proportions of such materials at the progressive positions, and an insulating member disposed on the ferrule in hermetically sealed relationship with the terminal pin and the ferrule at the external position.
Claim 19
Dependent Claim
29 words
The combination set forth in claim 13 wherein the ferrule is provided with a flange enveloping the terminal pin and the insulating member is hermetically sealed to the flange.
Claim 20
Dependent Claim
111 words
In combination, a ferrule, a terminal pin disposed in spaced relationship to the ferrule, and a plurality of insulating members disposed in stacked relationship with respect to the terminal pin and the ferrule and made from a ceramic material having partially amorphous and partially polycrystalline properties, each of the insulating members being fused to adjacent ones of the terminal pin, the ferrule and the other insulating members, each of the insulating members having a coefficient of thermal expansion which changes with temperature at a rate which matches the change in the coefficient of thermal expansion of at least one of the ferrule and the terminal pin with such changes in temperature.
Claim 21
Dependent Claim
111 words
In combination, a ferrule, a terminal pin disposed in spaced relationship to the ferrule, and a plurality of insulating members disposed in stacked relationship with respect to the terminal pin and the ferrule and made from a ceramic material having partially amorphous and partially polycrystalline properties, each of the insulating members being fused to adjacent ones of the terminal pin, the ferrule and the other insulating members, each of the insulating members having a coefficient of thermal expansion which changes with temperature at a rate which matches the change in the coefficient of thermal expansion of at least one of the ferrule and the terminal pin with such changes in temperature.
Claim 22
Dependent Claim
40 words
The combination set forth in claim 15 wherein at least a particular one of the insulating members has properties to withstand large forces and at least another one of the insulating members has properties to withstand sudden changes in temperature.
Claim 23
Dependent Claim
34 words
The combination set forth in claim 15 wherein progressive layers of the insulating members have progressive increases in the temperature of fusion to the at least one of the ferrule and the terminal pin.
Claim 24
Dependent Claim
42 words
The combination set forth in claim 17 wherein each of the progressive layers of the insulating members in the stacked relationship is formed from the same materials but in different proportions to provide for the progressive increases in the temperature of fusion.
Claim 25
Dependent Claim
16 words
The combination set forth in claim 15 wherein each of the insulating members is relatively non-viscous.
Claim 26
Dependent Claim
23 words
The combination set forth in claim 15 wherein each of the insulating members has an electrical resistivity as high as 10 10 ohms.
Claim 27
Dependent Claim
56 words
The combination set forth in claim 20 wherein each of the insulating members is formed from the following materials in the following percentages by weight: ______________________________________
Material Range of Percentages by Weight
______________________________________
Lead oxide (red lead)
57-68
Silicon dioxide 23-32
Soda ash (sodium carbonate)
0.4-0.6
Titanium dioxide 3.2-3.9
Zirconium oxide 3.0-3.7
Boric acid 2.2-2.6
______________________________________
Claim 28
Dependent Claim
44 words
The combination set forth in claim 15 wherein the ferrule has an opening and the terminal pin extends through the opening and the ferrule is annular and has a flange and an additional insulating layer hermetically seals the terminal pin and the ferrule flange.
Claim 29
Dependent Claim
16 words
The combination set forth in claim 15 wherein each of the insulating members is primarily polycrystalline.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |