# US 4,396,265 A · Monocular reflex camera having reflex mirror stop adjustment

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- Number: US 4,396,265 A
- Document ID: US4396265A
- Status: Granted
- Kind: A
- Application number: 06/340,934
- Filed: 1982-01-20
- Granted: 1983-08-02
- Earliest claimed: 1981-02-10
- Assignees: Veb Pentacon Dresden Kamera und Kinowerke
- Inventors: Herbert Welzel; Lothar Reschke; Heinz Schulze
- Web page: https://patentgrep.com/patent/US4396265A

## CPC

- G03B 19/12: Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

A monocular reflex camera having a device for adjusting the viewfinding position of a viewfinder mirror of which the pivot spindle is arranged in crankshaft manner in the camera housing, the viewfinder mirror being urged by a spring in the viewfinding position against first and second stop devices. Each stop device consists of a stop and a flat face arranged opposite to the stop. The flat faces of the two stop devices are arranged either on a setting carrier in the camera housing or on the mirror carrier. The flat faces of the two stop devices extend in mutually parallel planes. The first and second stop devices are shiftable both in relation to one another for the adjustment of the oblique position of the viewfinder mirror and in common for the sharp focussing of the viewfinder image.

## Claims

### Claim 1

A monocular reflex camera having a housing and a viewfinder mirror and carrier assembly arranged therein and movable between a viewing position and an exposure taking position, comprising:
(a) a pivoted crank arm of which the pivot shaft is connected with the mirror and carrier assembly,
(b) a setting carrier adjustably mounted within said camera housing,
(c) first and second stop devices which are shiftable both in relation to one another for the adjustment of the oblique viewfinding position of the viewfinder mirror,
(d) spring means for urging said assembly into the viewfinding position,
(e) each stop device consisting of a stop and a flat face arranged opposite to the stop, both the stops being arranged on one of the setting carrier and mirror carrier and both the flat faces of the two stop devices being arranged on the other of the setting carrier and the mirror carrier, the flat faces of the two stop devices extending in mutually parallel planes.
whereby the first and second stop devices are adjustable in relation to each other for the purpose of adjusting the angle of the reflex mirror and adjustable together for the purpose of sharp focussing of the viewfinder image.

### Claim 2 (depends on 1)

A camera according to claim 1, wherein said stop devices are mounted on said setting carrier and said flat faces are formed on the mirror and carrier assembly.

### Claim 3 (depends on 1)

A camera according to claim 1 wherein the flat faces lie in one common plane.

### Claim 4 (depends on 3)

A camera according to claim 3, wherein the flat faces are formed directly by the back of the mirror carrier.

### Claim 5 (depends on 1)

A camera according to claim 1, wherein the flat faces of the two stop devices are arranged inclined at an acute setting angle in relation to the shifting direction of the two stop devices.

### Claim 6 (depends on 1)

A camera according to claim 1, wherein the pivot spindle of the viewfinder mirror is formed as stop.