US3624829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflex camera apparatus
Assignee: Individual
•
Filing: 1968-11-08
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Granted: 1971-11-30
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Expires: 1988-11-08
Abstract
Abstract A single lens reflex camera apparatus having a continuously observable view-finding feature. An apertured mirror is provided between the entrance aperture and shutter of a camera with the mirror aperture positioned along the optical axis of the camera, so that the film-exposing light passes therethrough and the remaining light passing into the camera is reflected onto the view-finder.
Inventors
- 👤 Richard F Crone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:01
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
203 words
A camera, comprising: a camera housing; window means and film-positioning means defining an optical axis, said window means being formed in a wall of said housing for allowing light to pass along said optical axis for exposing a photographic film positioned by said film-positioning means; fixed mirror means disposed along said optical axis, said mirror means being inclined at an angle relative to said optical axis and having a single aperture therein concentric with said optical axis and forming a fixed aperture stop, said mirror means having a reflective surface on the side facing said window means for reflecting light not passing through said aperture; a focusing lens means and an adjustable aperture stop disposed along said optical axis between said lens means and said mirror means, the minimum dimensions of said fixed aperture being determined by the maximum stop diameter of said adjustable aperture stop; shutter means disposed along said optical axis between said mirror means and said positioning means for exposing said film to light passing through said aperture; and view-finder means disposed opposite said reflective surface for receiving light reflected from said reflected surface and providing a continuous view of the image to which said film is to be exposed.
Claim 2
Dependent Claim
203 words
A camera, comprising: a camera housing; window means and film-positioning means defining an optical axis, said window means being formed in a wall of said housing for allowing light to pass along said optical axis for exposing a photographic film positioned by said film-positioning means; fixed mirror means disposed along said optical axis, said mirror means being inclined at an angle relative to said optical axis and having a single aperture therein concentric with said optical axis and forming a fixed aperture stop, said mirror means having a reflective surface on the side facing said window means for reflecting light not passing through said aperture; a focusing lens means and an adjustable aperture stop disposed along said optical axis between said lens means and said mirror means, the minimum dimensions of said fixed aperture being determined by the maximum stop diameter of said adjustable aperture stop; shutter means disposed along said optical axis between said mirror means and said positioning means for exposing said film to light passing through said aperture; and view-finder means disposed opposite said reflective surface for receiving light reflected from said reflected surface and providing a continuous view of the image to which said film is to be exposed.
Claim 3
Dependent Claim
38 words
A camera as recited in claim 1 and further comprising a shroud means connecting said adjustable aperture stop and said aperture so as to prevent light passing outside of said aperture stop means from passing through said aperture.
Claim 4
Dependent Claim
187 words
In a camera for exposing a film-strip to a photographic image including, a camera housing having a window means for allowing light to enter said housing, a film-positioning means disposed along an optical axis passing through said window means, and shutter means disposed along said optical axis between said window means and said film-positioning means, the improvement comprising: a fixed mirror means disposed between said window means and said shutter means, said mirror means being inclined at an angle relative to said optical axis and having a single light transmissive aperture therein disposed concentric with said optical axis and forming a fixed aperture stop, said mirror means having a reflective surface on the side facing said window means for reflecting light not passing through said aperture; a focusing lens means and an adjustable aperture stop serially disposed along said optical axis between said window means and said mirror means, the minimum dimensions of said aperture being determined by the maximum stop diameter of said adjustable aperture stop; and view-finder means disposed relative to said reflective surface for rEceiving light reflected therefrom and continuously displaying said photographic image.
Claim 5
Dependent Claim
187 words
In a camera for exposing a film-strip to a photographic image including, a camera housing having a window means for allowing light to enter said housing, a film-positioning means disposed along an optical axis passing through said window means, and shutter means disposed along said optical axis between said window means and said film-positioning means, the improvement comprising: a fixed mirror means disposed between said window means and said shutter means, said mirror means being inclined at an angle relative to said optical axis and having a single light transmissive aperture therein disposed concentric with said optical axis and forming a fixed aperture stop, said mirror means having a reflective surface on the side facing said window means for reflecting light not passing through said aperture; a focusing lens means and an adjustable aperture stop serially disposed along said optical axis between said window means and said mirror means, the minimum dimensions of said aperture being determined by the maximum stop diameter of said adjustable aperture stop; and view-finder means disposed relative to said reflective surface for rEceiving light reflected therefrom and continuously displaying said photographic image.
Claim 6
Dependent Claim
39 words
In a camera as recited in claim 3 and further comprising a shroud means connecting said adjustable aperture stop and said aperture so as to prevent light passing outside of said adjustable aperture stop from passing through said aperture.
Claim 7
Dependent Claim
187 words
A camera, comprising: a camera housing; window means including a focusing lens means, and film-positioning means defining an optical axis, said window means being formed in a wall of said housing for allowing viewing light and film-exposing light to enter said housing; fixed mirror means disposed along said optical axis and having a reflective surface on the side facing said window means for reflecting said viewing light, said mirror means being inclined at an angle relative to said optical axis and having a single aperture therein concentric with said optical axis and forming a fixed aperture stop for allowing said film-exposing light to pass therethrough; an additional aperture stop disposed along said optical axis between said lens means and said mirror means and cooperating with said fixed aperture stop to define an exposure cone of said exposing light; shutter means disposed along said optical axis for selectively exposing the photographic film to said film exposing light; and view finder means disposed opposite said reflective surface for receiving the reflected viewing light and providing a continuous view of the image to which said film is to be exposed.
Claim 8
Dependent Claim
187 words
A camera, comprising: a camera housing; window means including a focusing lens means, and film-positioning means defining an optical axis, said window means being formed in a wall of said housing for allowing viewing light and film-exposing light to enter said housing; fixed mirror means disposed along said optical axis and having a reflective surface on the side facing said window means for reflecting said viewing light, said mirror means being inclined at an angle relative to said optical axis and having a single aperture therein concentric with said optical axis and forming a fixed aperture stop for allowing said film-exposing light to pass therethrough; an additional aperture stop disposed along said optical axis between said lens means and said mirror means and cooperating with said fixed aperture stop to define an exposure cone of said exposing light; shutter means disposed along said optical axis for selectively exposing the photographic film to said film exposing light; and view finder means disposed opposite said reflective surface for receiving the reflected viewing light and providing a continuous view of the image to which said film is to be exposed.
Claim 9
Dependent Claim
183 words
In a camera for exposing a photographic film to an image of a photographic object and including, a camera housing having a window means for allowing light to enter said housing, a film-positioning means disposed along an optical axis passing through said window means, and shutter means disposed along said optical axis between said window means and said film-positioning means, the improvement comprising: a fixed mirror means disposed between said window means and said shutter means, said mirror means being inclined at an angle relative to said optical axis and having a single light transmissive aperture therein disposed concentric with said optical axis and forming a fixed aperture stop, said mirror means having a reflective surface on the side facing said window means for reflecting light not passing through said aperture; an additional aperture stop disposed along said optical axis between said window means and said mirror means and cooperating with said single fixed aperture stop to define an exposure cone of film-exposing light; and view-finder means disposed relative to said reflective surface for receiving light reflected thereby and continuously displaying said image.
Claim 10
Dependent Claim
183 words
In a camera for exposing a photographic film to an image of a photographic object and including, a camera housing having a window means for allowing light to enter said housing, a film-positioning means disposed along an optical axis passing through said window means, and shutter means disposed along said optical axis between said window means and said film-positioning means, the improvement comprising: a fixed mirror means disposed between said window means and said shutter means, said mirror means being inclined at an angle relative to said optical axis and having a single light transmissive aperture therein disposed concentric with said optical axis and forming a fixed aperture stop, said mirror means having a reflective surface on the side facing said window means for reflecting light not passing through said aperture; an additional aperture stop disposed along said optical axis between said window means and said mirror means and cooperating with said single fixed aperture stop to define an exposure cone of film-exposing light; and view-finder means disposed relative to said reflective surface for receiving light reflected thereby and continuously displaying said image.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |