Patent US4447923A successfully refreshed from Google Patents.
Patent US3712737A successfully refreshed from Google Patents.
US3712737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescopic optical instrument
Assignee: Individual
•
Filing: 1971-09-28
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Granted: 1973-01-23
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Expires: 1991-09-28
Abstract
Abstract A telescopic instrument for optically measuring the distance of a viewed object, with automatic reduction of the measured values in the horizontal distance and simultaneous measurement of the width and height of a distant object, such as a tree trunk. In the optical path between the objective and eyepiece of the telescope is mounted a first prism whose upper edge divides the field of view into an upper and a lower part. A pendulum drum carries a measuring scale and is so arranged in the telescope housing that the visual rays of the lower part of the field of view are focused on a measuring scale section which is viewed in the lower part while the upper part of the field of view is covered by the portion of the distant object to which the telescope is directed.
Inventors
- 👤 W Bitterlich
- 👤 B Hesske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:59
CPC Classifications
G; G01; G01B; G01B5/00; G01B5/0035
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
239 words
A telescopic optical instrument comprising 1. a housing having two ends, 2. an eyepiece mounted at one end of the housing, 3. an adjustable objective mounted at the end of the housing opposite to the one end, 4. two associated inverting prisms arranged in the housing between the eyepiece and the objective to define an optical path therebetween to project an image received through the objective for viewing by the eyepiece, 5. a first prism mounted in the housing between the associated inverting prisms and the eyepiece, a. the prism having an upper edge in the plane of the image, whereby the field of view is divided into an upper and a lower part, 6. a pair of converging lenses mounted in the housing for adjustment in relation to each other, 7. a second prism mounted between the first prism and the pair of converging lenses, a. the second prism being arranged to receive the visual rays from the eyepiece in the lower part of the field of view below the edge of the first prism and to reflect them to the pair of converging lenses, and 8. a pendulum drum carrying a measuring scale on the periphery thereof, a. the pair of converging lenses being focused on the measuring scale whereby the image of the measuring scale section whereon the converging lenses are focused is projected at the eyepiece in the lower part of the field of view.
Claim 2
Dependent Claim
239 words
A telescopic optical instrument comprising 1. a housing having two ends, 2. an eyepiece mounted at one end of the housing, 3. an adjustable objective mounted at the end of the housing opposite to the one end, 4. two associated inverting prisms arranged in the housing between the eyepiece and the objective to define an optical path therebetween to project an image received through the objective for viewing by the eyepiece, 5. a first prism mounted in the housing between the associated inverting prisms and the eyepiece, a. the prism having an upper edge in the plane of the image, whereby the field of view is divided into an upper and a lower part, 6. a pair of converging lenses mounted in the housing for adjustment in relation to each other, 7. a second prism mounted between the first prism and the pair of converging lenses, a. the second prism being arranged to receive the visual rays from the eyepiece in the lower part of the field of view below the edge of the first prism and to reflect them to the pair of converging lenses, and 8. a pendulum drum carrying a measuring scale on the periphery thereof, a. the pair of converging lenses being focused on the measuring scale whereby the image of the measuring scale section whereon the converging lenses are focused is projected at the eyepiece in the lower part of the field of view.
Claim 3
Dependent Claim
9 words
an eyepiece mounted at one end of the housing,
Claim 4
Dependent Claim
9 words
an eyepiece mounted at one end of the housing,
Claim 5
Dependent Claim
53 words
The telescopic optical instrument of claim 1, further comprising a pivotal mirror mounted in the housing between the objective and the pendulum drum measuring scale, the mirror being arranged to reflect a portion of the light entering through the objective to the measuring scale, and means for adjusting the position of the mirror.
Claim 6
Dependent Claim
15 words
an adjustable objective mounted at the end of the housing opposite to the one end,
Claim 7
Dependent Claim
15 words
an adjustable objective mounted at the end of the housing opposite to the one end,
Claim 8
Dependent Claim
33 words
two associated inverting prisms arranged in the housing between the eyepiece and the objective to define an optical path therebetween to project an image received through the objective for viewing by the eyepiece,
Claim 9
Dependent Claim
33 words
two associated inverting prisms arranged in the housing between the eyepiece and the objective to define an optical path therebetween to project an image received through the objective for viewing by the eyepiece,
Claim 10
Dependent Claim
42 words
a first prism mounted in the housing between the associated inverting prisms and the eyepiece, a. the prism having an upper edge in the plane of the image, whereby the field of view is divided into an upper and a lower part,
Claim 11
Dependent Claim
42 words
a first prism mounted in the housing between the associated inverting prisms and the eyepiece, a. the prism having an upper edge in the plane of the image, whereby the field of view is divided into an upper and a lower part,
Claim 12
Dependent Claim
16 words
a pair of converging lenses mounted in the housing for adjustment in relation to each other,
Claim 13
Dependent Claim
16 words
a pair of converging lenses mounted in the housing for adjustment in relation to each other,
Claim 14
Dependent Claim
55 words
a second prism mounted between the first prism and the pair of converging lenses, a. the second prism being arranged to receive the visual rays from the eyepiece in the lower part of the field of view below the edge of the first prism and to reflect them to the pair of converging lenses, and
Claim 15
Dependent Claim
55 words
a second prism mounted between the first prism and the pair of converging lenses, a. the second prism being arranged to receive the visual rays from the eyepiece in the lower part of the field of view below the edge of the first prism and to reflect them to the pair of converging lenses, and
Claim 16
Dependent Claim
51 words
a pendulum drum carrying a measuring scale on the periphery thereof, a. the pair of converging lenses being focused on the measuring scale whereby the image of the measuring scale section whereon the converging lenses are focused is projected at the eyepiece in the lower part of the field of view.
Claim 17
Dependent Claim
51 words
a pendulum drum carrying a measuring scale on the periphery thereof, a. the pair of converging lenses being focused on the measuring scale whereby the image of the measuring scale section whereon the converging lenses are focused is projected at the eyepiece in the lower part of the field of view.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |