US5355683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic temperature control and tension/compression attachment stage for an electron microscope
Assignee: United States Department of the Navy
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Filing: 1993-12-14
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Granted: 1994-10-18
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Expires: 2013-12-14
Abstract
Abstract A tension-compression attachment stage for an electron microscope having aryogenic heat exchanger is provided. The attachment stage has a support assembly for mounting brackets to support a pair of load screws and a load screw drive assembly and for mounting a fixed jaw. A moveable jaw is supported and moved by the pair of load screws. A cryogenic heat exchanger is soldered to the fixed jaw and slideably engages the moveable jaw through heat conducting slider blocks. The combination allows control of test specimen test within 1°-4°F.
Inventors
- 👤 Dale E. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:54
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/20; G; G01; G01N; G01N3/00; G01N3/02; G01N3/04; G01N3/08; G01N3/18; G01N2203/00; G01N2203/0014; G01N2203/0016; G01N2203/02; G01N2203/022; G01N2203/0222; G01N2203/0228; G01N2203/023; G01N2203/0234; G01N2203/04; G01N2203/0423; H01J2237/00; H01J2237/20; H01J2237/2001; H01J2237/206; H01J2237/2062
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
136 words
A tension-compression attachment stage for use with an electron microscope comprising: a base fixture having an upper surface, a lower surface, and a front face; a drive support bracket attached to the lower surface of said base fixture; a load-screw support bracket attached to the upper surface of said base fixture; a pair of load screws rotatably mounted in said base fixture and further secured by rotatable mounts in the load screw support bracket; a fixed jaw assembly fixed to the front face of said base fixture; a moveable jaw assembly mounted on said load screws; a drive assembly mounted on said drive support bracket and engaging said load screws and rotatably driving said load screws; and a cryogenic cooling loop fixedly mounted on said fixed jaw assembly and slideably mounted on said moving jaw assembly.
Claim 2
Dependent Claim
136 words
A tension-compression attachment stage for use with an electron microscope comprising: a base fixture having an upper surface, a lower surface, and a front face; a drive support bracket attached to the lower surface of said base fixture; a load-screw support bracket attached to the upper surface of said base fixture; a pair of load screws rotatably mounted in said base fixture and further secured by rotatable mounts in the load screw support bracket; a fixed jaw assembly fixed to the front face of said base fixture; a moveable jaw assembly mounted on said load screws; a drive assembly mounted on said drive support bracket and engaging said load screws and rotatably driving said load screws; and a cryogenic cooling loop fixedly mounted on said fixed jaw assembly and slideably mounted on said moving jaw assembly.
Claim 3
Dependent Claim
26 words
A tension-compression attachment stage as in claim 1 wherein said pair of load screws are rotatably mounted in said base fixture by axial load carrying bearings.
Claim 4
Dependent Claim
26 words
A tension-compression attachment stage as in claim 1 wherein said pair of load screws are rotatably mounted in said load screw support bracket by insert bearings.
Claim 5
Dependent Claim
55 words
A tension-compression attachment stage as in claim 1 wherein said fixed jaw assembly further comprises a first jaw attached to said base fixture, said first jaw having holes for pass through of said load screws, and a second jaw screwed to said first jaw, the two jaws providing a gripping mechanism for a test sample.
Claim 6
Dependent Claim
44 words
A tension-compression attachment stage as in claim 1 wherein said moveable jaw assembly comprises a first jaw having threaded side supports, each attached to heat conducting slider blocks, which blocks slideably engage said cryogenic cooling loops and provide support for a second moveable jaw.
Claim 7
Dependent Claim
16 words
A tension-compression attachment stage as in claim 5 wherein said slider blocks are fabricated using copper.
Claim 8
Dependent Claim
24 words
A tension-compression attachment stage as in claim 1 wherein said drive assembly comprises a worm drive engaging the drive gears on said load screws.
Claim 9
Dependent Claim
30 words
A tension-compression attachment stage as in claim 1 wherein said cryogenic cooling loop comprises a copper tube soldered to said fixed jaw assembly and slideably engaging said moveable jaws assembly.
Claim 10
Dependent Claim
19 words
A tension-compression attachment stage as in claim 8 wherein said copper tube directly and slideably engages the moveable jaw.
Claim 11
Dependent Claim
18 words
A tension-compression attachment stage as in claim 1 wherein said fixed jaw assembly comprises a stainless steel jaw.
Claim 12
Dependent Claim
18 words
A tension-compression attachment stage as in claim 1 wherein said moveable jaw assembly comprises a stainless steel jaw.
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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) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |