Patent US3896314A successfully refreshed from Google Patents.
US3896314A
Expired / Lapsed
US
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Specimen heating and positioning device for an electron microscope
Assignee: Jeol Ltd
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Filing: 1973-12-05
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Granted: 1975-07-22
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Expires: 1993-12-05
Abstract
Abstract A specimen heating and positioning device having a specimen stage with a specimen holder mounted thereon. The specimen stage positions the specimen at the optical axis. The specimen holder, including a specimen and heating coil, is disposed so that the shifting of the specimen holder due to thermal expansion or contraction is offset by a corresponding shifting of the specimen stage.
Inventors
- 👤 Shigeru Nukui
- 👤 Hideaki Mikazuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:12
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
A specimen heating and positioning device for an electron microscope or the like having an electron optical axis comprising a specimen stage adjustably fixed for positioning a specimen along the optical axis, said stage arranged to expand on heatinG on an axis passing through the optical axis away from a first reference point fixed relative to the optical axis and spaced therefrom, a specimen holder mounted in said specimen stage for holding the specimen and arranged to expand on heating along the same axis along which the specimen stage expands in a direction away from a second reference point fixed relative to the specimen stage and on the opposite side of the optical axis from the first reference point, means for heating the specimen, the distances between the reference points and the optical axis being selected such that as the specimen holder and specimen are heated, incidental to the heating of the specimen, the expansion of the stage and holder are approximately equal thus maintaining the specimen substantially at the optical axis.
Claim 2
Dependent Claim
172 words
A specimen heating and positioning device for an electron microscope or the like having an electron optical axis comprising a specimen stage adjustably fixed for positioning a specimen along the optical axis, said stage arranged to expand on heatinG on an axis passing through the optical axis away from a first reference point fixed relative to the optical axis and spaced therefrom, a specimen holder mounted in said specimen stage for holding the specimen and arranged to expand on heating along the same axis along which the specimen stage expands in a direction away from a second reference point fixed relative to the specimen stage and on the opposite side of the optical axis from the first reference point, means for heating the specimen, the distances between the reference points and the optical axis being selected such that as the specimen holder and specimen are heated, incidental to the heating of the specimen, the expansion of the stage and holder are approximately equal thus maintaining the specimen substantially at the optical axis.
Claim 3
Dependent Claim
18 words
A specimen heating device according to claim 1 in which means are provided for heating the specimen stage.
Claim 4
Dependent Claim
29 words
A specimen heating and positioning device according to claim 1 wherein the said specimen holder is held on the said specimen stage by bearings made of thermal insulating material.
Claim 5
Dependent Claim
74 words
A specimen heating device according to claim 1 wherein the specimen holder mounted in said specimen stage is secured by four ball bearings, two bearings being seated in cone-shaped sockets formed on opposite sides of the said specimen holder and the adjoining portions of the specimen stage therein defining the second reference point and two being positioned in V-shaped grooves on opposite sides of the specimen holder and adjoining portions of the specimen stage.
References Cited (Backward Citations)
US2753458A
Cited
US3778621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |