US3724922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scope for viewing the internal surface of a bore of similar cavity
Assignee: Individual
•
Filing: 1970-12-17
•
Granted: 1973-04-03
•
Expires: 1990-12-17
Abstract
Abstract A scope for viewing the internal surfaces of bores or similar cavities which includes a rod of optically clear material having a viewing end and an image transmitting end. The transmitting end of the rod includes two optical surfaces which have an included angle of 45* therebetween and which serve to direct image producing light transmitted internally through the rod onto the internal surface to be viewed and to thereafter transmit the image of the internal surface to the viewing end of the rod. The rod includes an annular light gathering surface which is positioned between the viewing and transmitting ends of the rod and which serves to transmit light from an external source internally through the rod to the transmitting end thereof for the purpose of illuminating the internal surface.
Inventors
- 👤 I Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:43
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/24; G02B23/2407; Y; Y10; Y10S; Y10S385/00; Y10S385/902
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
236 words
A scope for viewing the internal surface of a bore or similar cavity comprising a rod having a viewing end and an image transmItting end, said image transmitting end including a first flat optical surface extending obliquely to the axis of said rod and a second flat optical surface paralleling the axis of said rod and located oppositely adjacent said first optical surface, the plane of said first optical surface so intersecting the plane of said second optical surface wherein image producing light when transmitted from an external source down said rod is reflected by said first optical surface through said second optical surface onto said internal surface with the image of said internal surface produced thereby being reflected by said first optical surface into the viewing end of said rod, said rod including an enlarged head and a coaxial shank both formed of continuous optically clear material, said shank including said first and second optical surfaces, said head including an optical viewing surface through which the reflected image of said internal surface is seen and a frusto-conical light gathering part positioned between said viewing surface and said shank for transmitting said image producing light from said external source down said shank, said light gathering part being coaxial with said shank and including an optical light transmitting surface means tapered toward said viewing surface for collecting overhead ambient light and directing said light down said shank.
Claim 2
Dependent Claim
236 words
A scope for viewing the internal surface of a bore or similar cavity comprising a rod having a viewing end and an image transmItting end, said image transmitting end including a first flat optical surface extending obliquely to the axis of said rod and a second flat optical surface paralleling the axis of said rod and located oppositely adjacent said first optical surface, the plane of said first optical surface so intersecting the plane of said second optical surface wherein image producing light when transmitted from an external source down said rod is reflected by said first optical surface through said second optical surface onto said internal surface with the image of said internal surface produced thereby being reflected by said first optical surface into the viewing end of said rod, said rod including an enlarged head and a coaxial shank both formed of continuous optically clear material, said shank including said first and second optical surfaces, said head including an optical viewing surface through which the reflected image of said internal surface is seen and a frusto-conical light gathering part positioned between said viewing surface and said shank for transmitting said image producing light from said external source down said shank, said light gathering part being coaxial with said shank and including an optical light transmitting surface means tapered toward said viewing surface for collecting overhead ambient light and directing said light down said shank.
Claim 3
Dependent Claim
22 words
The scope of claim 1 wherein said light gathering part has a maximum diameter exceeding the maximum transverse dimension of said shank.
Claim 4
Dependent Claim
83 words
The scope of claim 2 wherein said shank is cylindrical with said second optical surface forming a flat in the outer surface of said shank and having a width which is less than the diameter of said shank, said light gathering part having a minimum diameter which is less than the diameter of said shank so that a portion of the image of said internal surface as reflected by said first optical surface is blocked off from the view of the scope user.
Claim 5
Dependent Claim
25 words
The scope of claim 3 wherein the minimum diameter of said light gathering part is no greater than the minimum side dimension of said flat.
Claim 6
Dependent Claim
207 words
A scope for viewing the internal surface of a bore or similar cavity comprising a rod of optically clear material having a viewing end and an image transmitting end, said image transmitting end including a first flat optical surface extending obliquely to the axis of said rod and a second flat optical surface paralleling the axis of said rod and located oppositely adjacent said first optical surface, the plane of said first optical surface so intersecting the plane of said optical surface wherein image producing light when transmitted from an external source down said rod is reflected by said first optical surface through said second optical surface onto said internal surface with the image of said internal surface produced thereby being reflected by said first optical surface into the viewing end of said rod, said rod including an enlarged head and coaxial shank, said head including an optical viewing surface having an annular groove formed therein between said viewing surface and shank, said groove defined by an annular optical surface means coaxial with said shank, said annular optical surface means being frusto-conical and converging toward said optical viewing surface for collecting overhead ambient light and directing said light down said shank and onto said first optical surface.
Claim 7
Dependent Claim
207 words
A scope for viewing the internal surface of a bore or similar cavity comprising a rod of optically clear material having a viewing end and an image transmitting end, said image transmitting end including a first flat optical surface extending obliquely to the axis of said rod and a second flat optical surface paralleling the axis of said rod and located oppositely adjacent said first optical surface, the plane of said first optical surface so intersecting the plane of said optical surface wherein image producing light when transmitted from an external source down said rod is reflected by said first optical surface through said second optical surface onto said internal surface with the image of said internal surface produced thereby being reflected by said first optical surface into the viewing end of said rod, said rod including an enlarged head and coaxial shank, said head including an optical viewing surface having an annular groove formed therein between said viewing surface and shank, said groove defined by an annular optical surface means coaxial with said shank, said annular optical surface means being frusto-conical and converging toward said optical viewing surface for collecting overhead ambient light and directing said light down said shank and onto said first optical surface.
Claim 8
Dependent Claim
35 words
The scope of claim 5 wherein said annular optical surface means has a major diameter exceeding the maximum transverse dimension of said shank and defining an annular shoulder which separates said head from said shank.
Claim 9
Dependent Claim
39 words
The scope of claim 5 wherein said groove is V-shaped and defined by said annular optical surface means which is clear and a frusto-conical annular opaque surface located between said optical viewing surface and said annular optical surface means.
Claim 10
Dependent Claim
40 words
The scope of claim 5 wherein said groove is V-shaped and defined by said annular optical surface means which is clear and a frusto-conical anNular light diffusing surface located between said optical viewing surface and said annular optical surface means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |