Claims
- 1. An electron tube including a tubular glass envelope portion having an electrode system slidably supported therein by a plurality of pretensioned metallic spring elements, each of said spring elements having a first end attached to the electrode system and extending angularly therefrom, generally in a direction of insertion of the electrode system into the tubular glass envelope portion, to a second end thereof which slidably presses against an inner wall surface of the envelope portion;
- characterized in that the first end of each of the spring elements is affixed to the electrode system at a first point, the second end of each of said spring elements slidably contacts the inner wall surface at a second point, and each of said spring elements is shaped such that:
- 1) in a relaxed state, before insertion into the envelope portion, an effective length of said spring element extending from the first point to the second point has a predefined curve including at least one bend and arcuate portion on each side of said bend for establishing a predetermined normal force F.sub.r at the second point, perpendicular to the inner wall surface, when in the pretensioned state; and
- 2) in the pretensioned state, after insertion into the envelope portion, said spring element is centered substantially along a straight line over its effective length;
- said shape ensuring that the normal force F.sub.r, acting through the second point against pressure applied by the spring element, and a frictional force F.sub.f, acting against a force applied to cause sliding of the second end along said inner wall surface, collectively produce a resultant force acting along the effective length of the spring element and having substantially no component acting perpendicularly to said effective length, thereby substantially preventing flexing of the spring element during insertion of the electrode system into the envelope portion.
- 2. An electron tube including a tubular glass envelope portion having an electrode system slidably supported therein by a plurality of pretensioned metallic spring elements, each of said spring elements having a first end attached to the electrode system and extending angularly therefrom, generally in a direction of insertion of the electrode system into the tubular glass envelope portion, to a second end thereof which slidably presses against an inner wall surface of the envelope portion;
- characterized in that the first end of each of the spring elements is affixed to the electrode system at a first point, the second end of each of said spring elements slidably contacts the inner wall surface at a second point and, at least where it presses against the inner wall surface, compresses a layer of material having a lower hardness than the hardness of the material forming the spring element itself, and each of said spring elements is shaped such that:
- 1) in a relaxed state, before insertion into the envelope portion, an effective length of said spring element extending from the first point to the second point has a predefined curve for establishing a predetermined normal force F.sub.r at the second point, perpendicular to the inner wall surface, when in the pretensioned state; and
- 2) in the pretensioned state, after insertion into the envelope portion, said spring element is centered substantially along a straight line over its effective length;
- said shape ensuring that the normal force F.sub.r, acting through the second point against pressure applied by the spring element, and a frictional force F.sub.f, acting against a force applied to cause sliding of the second end along said inner wall surface, collectively produce a resultant force acting along the effective length of the spring element and having substantially no component acting perpendicularly to said effective length, thereby substantially preventing flexing of the spring element during insertion of the electrode system into the envelope portion.
- 3. An electron tube as in claim 2 where said layer consists essentially of a copper-nickel alloy and where the spring element consists essentially of chromium-nickel steel.
- 4. An electron tube including a tubular glass envelope portion having an electrode system slidably supported therein by a plurality of pretensioned metallic spring elements, each f said spring elements having a first end attached to the electrode system and extending angularly therefrom, generally in a direction of insertion of the electrode system into the tubular glass envelope portion, to a second end thereof which slidably presses against an inner wall surface of the envelope portion;
- characterized int hat the first end of each of the spring elements is affixed to the electrode system at a first point, the second end of each of said spring elements slidably contacts the inner wall surface at a second point and, at lest where it presses against the inner wall surface, is chemically roughened, and each of said spring elements is shaped such that:
- 1) in a relaxed state, before insertion into the envelope portion, an effective length of said spring element extending from the first point to the second point has a predefined curve for establishing a predetermined normal force F.sub.r at the second point, perpendicular to the inner wall surface, when in the pretensioned state; and
- 2) in the pretensioned state, after insertion into the envelope portion, said spring element is centered substantially along a straight line over its effective length;
- said shape ensuring that the normal force F.sub.r, acting through the second point against pressure applied by the spring element, and a frictional force F.sub.f, acting against a force applied to cause sliding of the second end along said inner wall surface, collectively produce a resultant force acting along the effective length of the spring element and having substantially no component acting perpendicularly to said effective length, thereby substantially preventing flexing of the spring element during insertion of the electrode system into the envelope portion.
- 5. An electron tube including a tubular glass envelope portion having an electrode system slidably supported therein by a plurality of pretensioned metallic spring elements, each of said spring elements having a first end attached to the electrode system and extending angularly therefrom, generally in a direction of insertion of the electrode system into the tubular glass envelope portion, to a second end thereof which slidably presses against an inner wall surface of the envelope portion;
- characterized in that the first end of each of the spring elements is affixed to the electrode system at a first point, the second end of each of said spring elements slidably contacts the inner wall surface at a second point, and each of the spring elements is shaped to prevent flexing of said spring element during insertion of the electrode system into the envelope portion, each of said spring elements having an effective length extending form the first point to the second point which:
- 1) in a relaxed state, before insertion into the envelope portion, has a predefined non-linear form including at least one bend and an arcuate portion on each side of said bend for establishing, after insertion when in the pretensioned state, a linear form and a predetermined normal force F.sub.r perpendicular to the inner wall surface at the second point; and
- 2) in the pretensioned state, after insertion into the envelope portion, has said linear form whereby said effective length is centered substantially along a straight line;
- said linear form ensuring that the normal force F.sub.r, acting through the second point against pressure applied by the spring element, and a frictional force F.sub.f, acting in a direction opposite to a force applied to cause sliding of the second end along said inner wall surface, collectively produce a resultant force acting along the effective length of the spring element and having substantially no component acting perpendicularly to said effective length.
- 6. An electron tube including a tubular glass envelope portion having an electrode system slidably supported therein by a plurality of pretensioned metallic spring elements, each of said spring elements having a first end attached to the electrode system and extending angularly therefrom, generally in a direction of insertion of the electrode system into the tubular glass envelope portion, to a second end thereof which slidably presses against an inner wall surface of the envelope portion;
- characterized in that the first end of each of the spring elements is affixed to the electrode system at a first point, the second end of each of said spring elements slidably contacts the inner wall surface at a second point and, at least where it presses against the inner wall surface, comprises a layer of material having a lower hardness than the hardness of the material forming the spring element itself, and each of the spring elements is shaped to prevent flexing of said spring element during insertion of the electrode system into the envelope portion, each of said spring elements having an effective length extending from the first point to the second point which:
- 1) in a relaxed state, before insertion into the envelope portion, has a predefined non-linear form for establishing, after insertion when in the pretensioned state, a linear form and a predetermined normal force F.sub.r perpendicular to the inner wall surface at the second point; and
- 2) in the pretensioned state, after insertion into the envelope portion, has said linear form whereby said effective length is centered substantially along a straight line;
- said linear form ensuring that the normal force F.sub.r, acting through the second point against pressure applied by the spring element, and a frictional force F.sub.f, acting in a direction opposite to a force applied to cause sliding of the second end along said inner wall surface, collectively produce a resultant force acting along the effective length of the spring element and having substantially no component acting perpendicularly to said effective length.
- 7. An electron tube as in claim 6 where said layer consists essentially of a copper-nickel alloy and where the spring element consists essentially of chromium-nickel steel.
- 8. An electron tube including a tubular glass envelope portion having an electrode system slidably supported therein by a plurality of pretensioned metallic spring elements, each of said spring elements having a first end attached to the electrode system and extending angularly therefrom, generally in a direction of insertion of the electrode system into the tubular glass envelope portion, to a second end thereof which slidably presses against an inner wall surface of the envelope portion;
- characterized in that the first end of each of the spring elements is affixed to the electrode system at a first point, the second end of each of said spring elements slidably contacts the inner wall surface at a second point and, at least where it presses against the inner wall surface, is chemically roughened, and each of the spring elements is shaped to prevent flexing of said spring element during insertion of the electrode system into the envelope portion, each of said spring elements having an effective length extending from the first point to the second point which:
- 1) in a relaxed state, before insertion into the envelope portion, has a predefined non-linear form for establishing, after insertion when in the pretensioned state, a linear form and a predetermined normal force F.sub.r perpendicular to the inner wall surface at the second point; and
- 2) in the pretensioned state, after insertion into the envelope portion, has said linear form whereby said effective length is centered substantially along a straight line;
- said shape form ensuring that the normal force F.sub.r, acting through the second point against pressure applied by the spring element, and a frictional force F.sub.f, acting in a direct opposite to a force applied to cause sliding of the second end along said inner wall surface, collectively produce a resultant force acting along the effective length of the spring element and having substantially no component acting perpendicularly to said effective length.
- 9. An electron tube including a tubular glass envelope portion having an electrode system slidably supported therein by a plurality of pretensioned metallic spring elements, each of said spring elements having a first end attached to the electrode system and extending angularly therefrom, generally in a direction of insertion of the electrode system into the tubular glass envelope portion, to a second end thereof which slidably presses against an inner wall surface of the envelope portion;
- characterized in that the first end of each of the spring elements is affixed to the electrode system at a first point, the second end of each of said spring elements slidably contacts the inner wall surface at a second point, and each of said spring elements is shaped such that:
- a) in a relaxed state, before insertion into the envelope portion, said spring element has a predefined shape including at least one bend and an arcuate portion on each side of said bend for establishing a predetermined normal force F.sub.r at the second point, perpendicular to the inner wall surface, when in the pretensioned state; and
- b) in the pretensioned state, after insertion into the envelope portion, an affective length of said spring element extending from the first point to the second point is centered substantially along a straight line over its effective length;
- said shape form ensuring that the normal force F.sub.r, acting through the second point against pressure applied by the spring element, and a frictional force F.sub.f, acting in a direction opposite to said direction of insertion, collectively produce a resultant force acting substantially along the effective length of the spring element and having substantially no component acting perpendicularly to said effective length.
- 10. An electron tube including a tubular glass envelope portion having an electrode system slidably supported therein by a plurality of pretensioned metallic spring elements, each of said spring elements having a first end attached to the electrode system and extending angularly therefrom, generally in a direction of insertion of the electrode system into the tubular glass envelope portion, to a second end thereof which slidably presses against an inner wall surface of the envelope portion;
- characterized in that the first end of each of the spring elements is affixed to the electrode system at a first point, the second end of each of said spring elements slidably contacts the inner wall surface at a second point and, at least where it presses against the inner wall surface, comprises a layer of material having a lower hardness than the hardness of the material forming the spring element itself, and each of said spring elements is shaped such that:
- a) in a relaxed state, before insertion into the envelope portion, said spring element has a predefined shape for establishing a predetermined normal force F.sub.r at the second point, perpendicular to the inner wall surface, when in the pretensioned state; and
- b) in the pretensioned state, after insertion into the envelope portion, an effective length of said spring element extending from the first point of the second point is centered substantially along a straight line over its effective length;
- said shape ensuring that the normal force F.sub.r, acting through the second point against pressure applied by the spring element, and a friction force F.sub.f, acting in a direction opposite to said direction of insertion, collectively produce a resultant force acting substantially along the effective length of the spring element and having substantially no component acting perpendicularly to said effective length.
- 11. An electron tube as in claim 10 where said layer consists essentially of a copper-nickel alloy and where the spring element consists essentially of chromium-nickel steel.
- 12. An electron tube including a tubular glass envelope portion having an electrode system slidably supported therein by a plurality of pretensioned metallic spring elements, each of said spring element having a first end attached to the electrode system and extending angularly therefrom, generally in a direction of insertion of the electrode system into the tubular glass envelope portion, to a second end thereof which slidably presses against an inner wall surface of the envelope portion;
- characterized in that the first end of each of the spring elements is affixed to the electrode system at a first point, the second end of each of said spring elements slidably contacts the inner wall surface at a second point and, at least where it presses against the inner wall surface, is chemically roughened, and each of said spring elements is shaped such that:
- a) in a relaxed state, before insertion into the envelope portion, said spring element has a predefined shape, for establishing a predetermined normal force F.sub.r at the second point, perpendicular to the inner wall surface, when in the pretensioned state; and
- b) in the pretensioned state, after insertion into the envelope portion, an effective length of said spring element extending from the first point other second point is centered substantially along a straight line over its effective length;
- said shape ensuring that the normal force F.sub.r, acting through the second point against pressure applied by the spring element, and a friction force F.sub.f, acting in a direction opposite to said direction of insertion, collectively produce a resultant force acting substantially along the effective length of the spring element and having substantially no component acting perpendicularly to said effective length.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8303145 |
Sep 1983 |
NLX |
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Parent Case Info
This is a continuation of application Ser. No. 647,196, filed Sep. 4, 1984 now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (2)
Number |
Date |
Country |
2720554 |
Nov 1978 |
DEX |
0032553 |
Feb 1982 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
647196 |
Sep 1984 |
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