US3775004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
View screen microscopes
Assignee: PARCO SCIENT CO
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Filing: 1971-05-11
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Granted: 1973-11-27
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Expires: 1991-05-11
Abstract
Abstract A new view screen microscope comprising a base structure supporting a stage plate and an optical system, and a hollow elbow-shaped housing mounted on the top of the base structure and supporting reflecting mirrors and a screen plate on which the magnified image of a specimen on the stage plate is displayed. The housing is rotatably mounted on the base structure and the latter comprises a base and a bridge formed by a plurality of legs, the lower ends of which are connected to the base and the upper ends of which are joined to form a ledge to which the hollow housing is connected.
Inventors
- 👤 B Parker
- 👤 C Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:45
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/36; G02B21/364
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
192 words
A view screen microscope, comprising: a base, a bridge including a plurality of legs fixed at their lower ends to said base, said legs extending upwardly and inwardly from their lower ends and terminating in a fixed boss having an upwardly opening cylindrical recess therein, said boss recess having an aperture centrally thereon, a stage plate disposed within said legs and beneath said aperture, means mounting said stage plate on said base for vertical adjustment with respect thereto, a lens system cooperatively associated with said stage plate and in optical alignment with said aperture, a hollow housing having one open end provided with a cylindrical ring whch is rotatably seated within said boss cylindrical recess and about said aperture, said housing having optical means therein for directing light rays from lens system through said housing to another open end thereof, and, a screen plate disposed across said housing adjacent said other open end thereof for arresting and displaying an image projected thereon by said optical means, said optical means and said lens system being constructed and arranged to provide for the display of said image in any rotated position of said housing.
Claim 2
Dependent Claim
192 words
A view screen microscope, comprising: a base, a bridge including a plurality of legs fixed at their lower ends to said base, said legs extending upwardly and inwardly from their lower ends and terminating in a fixed boss having an upwardly opening cylindrical recess therein, said boss recess having an aperture centrally thereon, a stage plate disposed within said legs and beneath said aperture, means mounting said stage plate on said base for vertical adjustment with respect thereto, a lens system cooperatively associated with said stage plate and in optical alignment with said aperture, a hollow housing having one open end provided with a cylindrical ring whch is rotatably seated within said boss cylindrical recess and about said aperture, said housing having optical means therein for directing light rays from lens system through said housing to another open end thereof, and, a screen plate disposed across said housing adjacent said other open end thereof for arresting and displaying an image projected thereon by said optical means, said optical means and said lens system being constructed and arranged to provide for the display of said image in any rotated position of said housing.
Claim 3
Dependent Claim
89 words
The construction of claim 1 wherein said base is provided with a neck and said stage plate iS provided with a cylindrical boss formed with exterior screw threads, a nut connected to said neck for rotation and having interior screw threads complementary to the threads on said boss so that said stage plate is moved vertically when said nut is rotated, and means in part carried by said neck and in part carried by said boss, cooperating to hold said stage plate against rotation as it is moved vertically.
Claim 4
Dependent Claim
34 words
The construction of claim 2 wherein said last named means comprises a plurality of vertically extending keys carried by and extending inwardly of said neck and mating with corresponding keyways formed on said boss.
Claim 5
Dependent Claim
82 words
The construction according to claim 1 wherein said housing is elbow-shaped and has a mirror therein positioned on the axis of rotation of said housing but angularly related to said axis, and a pair of angularly related mirrors spaced apart at the inner surface of said elbow, one to receive light rays reflected by the mirror on the axis of rotation and the other to receive light rays reflected by said one mirror and to reflect the same to said screen plate.
Claim 6
Dependent Claim
33 words
The construction according to claim 4 and further including an optical lens system between said other mirror and said screen plate through which light rays pass on their way to said screen plate.
Claim 7
Dependent Claim
29 words
The view screen microscope of claim 1 wherein said boss has rotatably mounted thereon on the underside thereof a plurality of objective lenses for selective alignment with said aperture
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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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |