US3665834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion picture camera with zoom lens
Assignee: Robert Bosch Photokino GmbH
•
Filing: 1970-08-12
•
Granted: 1972-05-30
•
Expires: 1990-08-12
Abstract
Abstract A motion picture camera wherein the lever which is movable to change the focal length of the zoom lens controls a carriage which moves a system of magnifying lenses into registry with the eyepiece of the through-the-lens viewfinder so that the user can see a greatly enlarged portion of the image prior to and during manipulation of the focusing ring. The lever places the magnifying lenses into registry with the eyepiece of when the zoom lens is adjusted for maximum focal length. A leaf spring in the lens mount biases the lever to a position in which the lever permits movement of the magnifying lenses out of registry with the eyepiece and places a second system of lenses into registry with the eyepiece. The second system of lenses does not appreciably magnify the viewed image.
Inventors
- 👤 Richard Loewe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:51
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/18
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
126 words
In a motion picture camera, a combination comprising an objective lens of variable focal length; actuating means movable between a plurality of positions to thereby change the focal length of said lens while moving between at least some of said positions; an eyepiece receiving light which passes through said objective lens focussing means; focussing aid means movable into and out of registry with said eyepiece; and an operative connection between said actuating means and said focussing aid means for moving the latter into registry with said eyepiece within a predetermined range of positions of said actuating means preparatory to actuation of said focussing means and to move said focussing aid means out of registry with said eyepiece when said actuating means leaves said range of positions.
Claim 2
Dependent Claim
126 words
In a motion picture camera, a combination comprising an objective lens of variable focal length; actuating means movable between a plurality of positions to thereby change the focal length of said lens while moving between at least some of said positions; an eyepiece receiving light which passes through said objective lens focussing means; focussing aid means movable into and out of registry with said eyepiece; and an operative connection between said actuating means and said focussing aid means for moving the latter into registry with said eyepiece within a predetermined range of positions of said actuating means preparatory to actuation of said focussing means and to move said focussing aid means out of registry with said eyepiece when said actuating means leaves said range of positions.
Claim 3
Dependent Claim
83 words
In a motion picture camera, a combination comprising a picture taking lens of variable focal length; actuating means movable between a plurality of positions to thereby change the focal length of said lens said positions; a through-the-lens viewfinder; focussing means; focussing aid means movable into and out of registry with said viewfinder; and operative connection between said actuating means and said focussing aid means for moving the latter into registry with said viewfinder within a predetermined range of positions of said actuating means.
Claim 4
Dependent Claim
83 words
In a motion picture camera, a combination comprising a picture taking lens of variable focal length; actuating means movable between a plurality of positions to thereby change the focal length of said lens said positions; a through-the-lens viewfinder; focussing means; focussing aid means movable into and out of registry with said viewfinder; and operative connection between said actuating means and said focussing aid means for moving the latter into registry with said viewfinder within a predetermined range of positions of said actuating means.
Claim 5
Dependent Claim
34 words
A combination as defined in claim 2, wherein said operative connection comprises means for moving said focussing aid means out of registry with said viewfinder when said actuating means leaves said range of positions.
Claim 6
Dependent Claim
106 words
In a motion picture camera, a combination comprising a picture taking lens of variable focal length; actuating means movable between a plurality of positions including two end positions to thereby change the focal length of said lens while moving between at least some of said positions; a viewfinder; focussing means; focussing aid means movable into and out of registry with said viewfinder; and an operative connection between said actuating means and said focussing aid means for moving the latter into registry with said viewfinder within a predetermined range of positions of said actuating means, said range of positions being adjacent to one of said end positions.
Claim 7
Dependent Claim
106 words
In a motion picture camera, a combination comprising a picture taking lens of variable focal length; actuating means movable between a plurality of positions including two end positions to thereby change the focal length of said lens while moving between at least some of said positions; a viewfinder; focussing means; focussing aid means movable into and out of registry with said viewfinder; and an operative connection between said actuating means and said focussing aid means for moving the latter into registry with said viewfinder within a predetermined range of positions of said actuating means, said range of positions being adjacent to one of said end positions.
Claim 8
Dependent Claim
21 words
A combination as defined in claim 4, wherein said range of positions corresponds to the maximum focal length of said lens.
Claim 9
Dependent Claim
35 words
A combination as defined in claim 5, further comprising means for biasing said actuating means to a given position outside of said range, said given position corresponding to the maximum focal length of said lens.
Claim 10
Dependent Claim
48 words
A combination as defined in claim 6, further comprising a housing and a tubular lens mount on said housing, said means for biasing comprising a spring provided in said mount and bearing against a portion of said actuating means when the latter assumes a position within said range.
Claim 11
Dependent Claim
131 words
In a motion picture camera, a combination comprising a picture taking lens of variable focal length; actuating means movable between a plurality of positions to thereby change the focal length of said lens while moving between at least some of said positions; a viewfinder; focussing means; focussing aid means movable into and out of registry with said view finder; and an operative connection between said actuating means and said focussing aid means for moving the latter into registry with said viewfinder within a predetermined range of positions of said actuating means, said operative connection comprising a carriage for said focussing aid means and a cam-and-follower drive receiving motion from said actuating means and arranged to move said carriage to a position in which said focussing aid means registers with said viewfinder.
Claim 12
Dependent Claim
131 words
In a motion picture camera, a combination comprising a picture taking lens of variable focal length; actuating means movable between a plurality of positions to thereby change the focal length of said lens while moving between at least some of said positions; a viewfinder; focussing means; focussing aid means movable into and out of registry with said view finder; and an operative connection between said actuating means and said focussing aid means for moving the latter into registry with said viewfinder within a predetermined range of positions of said actuating means, said operative connection comprising a carriage for said focussing aid means and a cam-and-follower drive receiving motion from said actuating means and arranged to move said carriage to a position in which said focussing aid means registers with said viewfinder.
Claim 13
Dependent Claim
31 words
A combination as defined in claim 8, further comprising means for biasing said carriage to a second position in which said focussing aid means is out of registry with said viewfinder.
Claim 14
Dependent Claim
104 words
In a motion picture camera, a combination comprising a picture taking lens of variable focal length; actuating means movable between a plurality of positions to thereby change the focal length of said lens while moving between at least some of said positions; a through-the-lens viewfinder having an eyepiece; focussing means coaxial with said lens; focussing aid means movable into and out of registry with said eyepiece of said viewfinder; and an operative connection between said actuating means and said focussing aid means for moving the latter into registry with said eyepiece of said viewfinder within a predetermined range of positions of said actuating means.
Claim 15
Dependent Claim
104 words
In a motion picture camera, a combination comprising a picture taking lens of variable focal length; actuating means movable between a plurality of positions to thereby change the focal length of said lens while moving between at least some of said positions; a through-the-lens viewfinder having an eyepiece; focussing means coaxial with said lens; focussing aid means movable into and out of registry with said eyepiece of said viewfinder; and an operative connection between said actuating means and said focussing aid means for moving the latter into registry with said eyepiece of said viewfinder within a predetermined range of positions of said actuating means.
References Cited (Backward Citations)
US3083628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |