Patent US4157802A successfully refreshed from Google Patents.
US4157802A
Expired / Lapsed
US
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Rigid thermally stable structure for supporting precision devices
Assignee: Burleigh Instruments Inc
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Filing: 1977-07-15
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Granted: 1979-06-12
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Expires: 1997-07-15
Abstract
Abstract A rigid thermally stable structure provides a platform on which devices may be supported in precise positional relationships. The platform is provided by a thin plate of material having a coefficient of thermal expansion which is relatively low, such as may be fabricated from an iron nickel alloy of the type manufactured under the trade names Invar and Super-Invar. A rigid base of material which may have a high thermal expansion coefficient is also provided. The thin plate is attached to the rigid base by an array of posts which imparts thereto the rigidity of the base for preventing flexural movement of the plate while permitting the base and plate to move with respect to each other as their longitudinal dimensions change with temperature. The thin plate therefore provides a rigid and thermally stable platform.
Inventors
- 👤 William G. May, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:47
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/025; F; F16; F16M; F16M11/00; F16M11/20; F16M11/22; G; G01; G01B; G01B5/00; G01B5/0002; G01B5/0007; G12; G12B; G12B9/00; G12B9/08; F16M2200/00; F16M2200/08; Y; Y10; Y10S; Y10S248/00; Y10S248/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
101 words
A structure for supporting and maintaining devices in precise positional relationship with respect to each other, said structure comprising a rigid base member, a plate which is flexible about the plane thereof when unsupported, said plate consisting of material having a coefficient of thermal expansion much lower than the coefficient of thermal expansion of said base member, and an array containing a plurality of posts extending vertically between said base member and said plate and said posts being attached at opposite ends to said plate and to said base member and maintaining and supporting said plate rigidly in the plane thereof.
Claim 2
Dependent Claim
101 words
A structure for supporting and maintaining devices in precise positional relationship with respect to each other, said structure comprising a rigid base member, a plate which is flexible about the plane thereof when unsupported, said plate consisting of material having a coefficient of thermal expansion much lower than the coefficient of thermal expansion of said base member, and an array containing a plurality of posts extending vertically between said base member and said plate and said posts being attached at opposite ends to said plate and to said base member and maintaining and supporting said plate rigidly in the plane thereof.
Claim 3
Dependent Claim
29 words
The invention as set forth in claim 1 wherein said plate is thin in thickness and has a cross-sectional thickness less than the cross-sectional thickness of said base member.
Claim 4
Dependent Claim
20 words
The invention as set forth in claim 2 wherein said base member has side walls and a web extending therebetween.
Claim 5
Dependent Claim
26 words
The invention as set forth in claim 1 wherein said plate has longitudinal and transverse dimensions not exceeding the longitudinal and transverse dimensions of said base.
Claim 6
Dependent Claim
58 words
The invention as set forth in claim 4 wherein said base forms a channel having a web and sides extending vertically from the longitudinal edges of said web, said plate having a length not exceeding the length of said channel and a width not exceeding the width of said channel, said posts disposed in a plurality of rows.
Claim 7
Dependent Claim
35 words
The invention as set forth in claim 5 wherein said sides extend in a direction toward said plate up to about the height of said posts such that said plate is disposed between said sides.
Claim 8
Dependent Claim
45 words
The invention as set forth in claim 2 wherein said plate is rectangular and said base member is a rectangular section, said base member section and said plate having surfaces which are opposed to each other said posts being disposed vertically between said opposed surfaces.
Claim 9
Dependent Claim
19 words
The invention as set forth in claim 7 wherein said opposed surfaces are planes substantially parallel to each other.
Claim 10
Dependent Claim
91 words
The invention as set forth in claim 2 wherein said plane has an array of holes which extend through the thickness thereof, said array of holes being in registry with said array of posts, the cross-sectional width of said posts being larger than the width of said holes so as to define shoulders on said posts about the peripheries of said holes on which said plate is disposed, and means engaging said plates in regions around the peripheries of said holes for clamping said plates and said shoulders of said posts.
Claim 11
Dependent Claim
21 words
The invention as set forth in claim 9 wherein said clamping means are screw fasteners in threaded engagement with said plate.
Claim 12
Dependent Claim
30 words
The invention as set forth in claim 9 wherein said array of posts comprises a plurality of rows of posts which are disposed in parallel planes perpendicular to said plate.
Claim 13
Dependent Claim
25 words
The invention as set forth in claim 11 wherein said plate consists of material selected from alloys of iron and nickel including Invar and Super-Invar.
Claim 14
Dependent Claim
31 words
The invention as set forth in claim 1 wherein said devices are optical devices, said devices being mounted on the surface of said plate which is opposite from said base member.
Claim 15
Dependent Claim
23 words
The invention as set forth in claim 13 wherein said optical devices include a plurality of mirrors and define a laser resonator cavity.
References Cited (Backward Citations)
DE1101015B
Cited
FR1245650A
Cited
US3201076A
Cited
US3077958A
Cited
US3069123A
Cited
US3352198A
Cited
US3397856A
Cited
US3429543A
Cited
US3490187A
Cited
US3530994A
Cited
US3942880A
Cited
US3823772A
Cited
US3912380A
Cited
US3854159A
Cited
US3941480A
Cited
US3972618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |