AUTOMATIC WIND-UP DEVICE FOR A CAMERA HAVING A MEMORY TYPE EXPOSURE CONTROL DEVICE

• US 3,827,067 A
• Filed: 07/05/1973
• Issued: 07/30/1974
• Est. Priority Date: 07/05/1972
• Status: Expired due to Term

• Current Assignee: Masayoshi Yamamichi
• Original Assignee: Masayoshi Yamamichi
• Inventors: Yamamichi, Masayoshi
• Primary Examiner(s): Matthews, Samuel S.
• Assistant Examiner(s): Gellner, Michael L.
• Application Number:
  US05/376,828
• Time in Patent Office: 390 Days
• Field of Search: 95/1CT,31EL
• US Class Current: 396/252
• CPC Class Codes: G03B 17/425 motor drive cameras
• CPC Class Codes: G03B 19/12 Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror
• CPC Class Codes: G03B 7/083 for control of exposure time
• CPC Class Codes: G03B 7/087 for control of both exposure time and aperture
• CPC Class Codes: G03B 7/089 for storage of exposure value in mirror reflex cameras

Abstract

An automatic wind-up device for a camera having a memory type exposure control device which allows change over between continuous photographing and single frame photographing, wherein when changed over to continuous photographing the photometrically sensed value of a first one frame is memorized and subsequent photographing is done based on said memorized value, thus a series of photographing is done while when changed over to single frame photographing, photometrically sensed value is memorized for each frame photographed for conducting photographing.

Claims

1. An automatic wind-up device for a camera, having an exposure control device, comprising an information input means into which such photographing information such as brightness of an object is put, a memorizing means to memorize output value of the abovementioned information input means, and said memorizing means is connected to the output terminal of the above mentioned information input means, an exposure control means which has the above-mentioned memorizing means connected to its input terminal and regenerates such a value as corresponding to the memorized value of the above-mentioned memory means to control exposure time, a first switching means to make ON and OFF the connecting relationship between the above-mentioned memory means and the above-mentioned information input means, a change over means to change over between a continuous photographing and a single frame photographing, said change over means having a second switching means being connected between the above-mentioned memory means and the abovementioned information input means, and a wind-up control means to conduct such wind up as corresponding to a continuous photographing and a single frame photographing, wherein said control means has an actuating means to actuate the above-mentioned first switching means.

2. The automatic wind-up device for a camera having an exposure control device as described in claim 1, which further comprises a third switching means connected between the above-mentioned information input means and the memory means, said third switching means being placed in ON position when an automatic wind-up means is not attached to a camera.

3. The automatic wind-up device for a camera having an exposure control device as described in claim 1, which further comprises a fourth switching means which is made to become OFF by pressing action of the release button and is connected in parallel with the above-mentioned second switching means.

4. The automatic wind-up device for a camera having an exposure control device as described in claim 1, in which said wind-up control means comprises a power source, a driving means which is connected between both terminals of said power source and performs shutter charging at a camera side and wind-up of film, an electro-magnetic member which is connected in parallel with the above-mentioned driving means to actuate the releasing function at a camera side, and a latching relay which is connected between both terminals of the above-mentioned power source and has a fifth switching means to place the abovementioned electro-magnetic member and the driving means in an operative state alternatively.