US3582188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zoom magnifier
Assignee: Individual
•
Filing: 1969-06-24
•
Granted: 1971-06-01
•
Expires: 1989-06-24
Abstract
Abstract A zoom tube type magnifier which includes, generally, eight lenses which are retained within a housing having means for adjustably positioning certain ones of said lenses with respect to one another in a fashion such as to provide a continuously variable 4.5- 9 power magnifier. Three of the eight lenses of the magnifier have planosurfaces, and only one doublet is used, hence the magnifier can be easily and inexpensively manufactured. One of the lenses also is adapted to be adjustably positioned to focus the magnifier to accommodate the eye of the user and, once the magnifier is focused, it need not be readjusted when varying its magnification power between its 4.5- 9 power range limit.
Inventors
- 👤 Ben W Rau
- 👤 Rokujiro Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:21
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
11 words
A zoom tube-type magnifier made substantially according to the following table:
Claim 2
Dependent Claim
11 words
A zoom tube-type magnifier made substantially according to the following table:
Claim 3
Dependent Claim
25 words
The zoom tube-type magnifier of claim 1, wherein the characteristics set forth in the following table hold substantially true at the various powers of magnification:
Claim 4
Dependent Claim
189 words
A zoom tube-type magnifier comprising: a barrel; a tubular shield and detent casing disposed about and slidably positionably adjustable with respect to said barrel; a lens housing having elongated slot means disposed within and slidably positionably adjustable with respect to said barrel; and eyepiece having an aperture in it fixedly secured to both said tubular shield and detent casing and said lens housing; said lens housing having first and second lens assemblies affixed to the front and rear ends thereof, respectively; a third lens assembly; said third lens assembly being affixed to said barrel by securement pin means extending through said elongated slot means in said lens housing and slidably disposed within said lens housing between said first and second lens assemblies therein; said barrel further having another lens assembly affixed within it at the rear end thereof; and a tubular shield affixed to said barrel at the rear end thereof for support of said magnifier in a fashion such that said other lens assembly affixed within said barrel at the rear end thereof is spaced a predetermined fixed distance from an object upon which said magnifier is seated.
Claim 5
Dependent Claim
189 words
A zoom tube-type magnifier comprising: a barrel; a tubular shield and detent casing disposed about and slidably positionably adjustable with respect to said barrel; a lens housing having elongated slot means disposed within and slidably positionably adjustable with respect to said barrel; and eyepiece having an aperture in it fixedly secured to both said tubular shield and detent casing and said lens housing; said lens housing having first and second lens assemblies affixed to the front and rear ends thereof, respectively; a third lens assembly; said third lens assembly being affixed to said barrel by securement pin means extending through said elongated slot means in said lens housing and slidably disposed within said lens housing between said first and second lens assemblies therein; said barrel further having another lens assembly affixed within it at the rear end thereof; and a tubular shield affixed to said barrel at the rear end thereof for support of said magnifier in a fashion such that said other lens assembly affixed within said barrel at the rear end thereof is spaced a predetermined fixed distance from an object upon which said magnifier is seated.
Claim 6
Dependent Claim
25 words
The zoom tube-type magnifier of claim 3, wherein said shield is adjustably threadably affixed to said barrel and is adjustably positionable to focus said magnifier.
Claim 7
Dependent Claim
25 words
The zoom tube-type magnifier of claim 4, wherein the end of said shield has a lens affixed to it to close the open end thereof.
Claim 8
Dependent Claim
42 words
The zoom tube-type magnifier of claim 3 wherein said barrel and said tubular shield and detent casing have a ball detent and annular detent grooves in them, respectively, for providing stop indices at various ones of the magnification powers of said magnifier.
Claim 9
Dependent Claim
36 words
The zoom tube-type magnifier of claim 6, further including indexing indicia on said barrel functionally related to the adjusted position of said tubular shield and detent casing for indicating the adjustEd magnification power of said magnifier.
Claim 10
Dependent Claim
36 words
The zoom tube-type magnifier of claim 3, wherein the lenses disposed within said magnifier are numbered L1-L7 from the front to the rear thereof, respectively, and said lenses are made substantially according to the following table:
Claim 11
Dependent Claim
25 words
The zoom tube-type magnifier of claim 8, wherein the characteristics set forth in the following table hold substantially true at the various powers of magnification:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |