Camera provided with a device for automatically photographing dates of photographing

Claim 2

A camera provided with a device for photographing the date of photo-taking comprising: data rings of transparent material carrying indicia thereon, display rings connected to said data rings for operating them exteriorly of said camera, said display rings carrying thereon indicia identical with those on said data rings to enable an operator to observe them exteriorly of said camera, said camera having a lens tube and said data rings and said display rings being rotatably mounted around said lens tube, said data rings carrying indicia on the inner wall surfaces thereof, a lamp for illuminating said indicia on said data rings, an optical system for directing the images of said indicia on said data rings illuminated by said lamp to a part of a focal plane of an objective lens, a slit provided between said data rings and said optical system for directing a selected set of said indicia to said optical system, a shutter mechanism, and a time control device actuated by releasing said shutter for turning said lamp on for a predetermined length of time.

Claim 3

A camera as defined in claim 1, wherein said lamp is interposed betwEen said data rings and said display rings so as to illuminate said indicia on said data rings from the exterior thereof.

Claim 4

A camera as defined in claim 1, wherein said data rings have their outer wall surfaces serving as reflective surfaces of a prism for directing light from said lamp to said indicia.

Claim 5

A camera provided with a device for photographing the data of photo-taking comprising: data rings of transparent material carrying indicia thereon, said camera having a film chamber and a light-proof frame, said data rings being disposed between the film chamber and the light-proof frame, display rings connected to said data rings for operating them exteriorly of said camera, said display rings carrying thereon indicia identical with those on said data rings to enable an operator to observe them exteriorly of said camera, a lamp for illuminating said indicia on said data rings, an optical system for directing the images of said indicia on said data rings illuminated by said lamp to a part of a focal plane of an objective lens, a slit provided between said data rings and said optical system for directing a selected set of said indicia to said optical system, a shutter mechanism, and a time control device actuated by releasing said shutter for turning said lamp on for a predetermined length of time, said time control device being adjustable in accordance with the sensitivity of a film used in said camera, and having a main switch for preparing said camera for data photographing, a data field display member capable of shifting from and into a field of a finder of said camera, said data field display member shifting in response to the closing and opening of said main switch, thereby indicating whether data photographing can be effected or not.

Claim 6

A camera provided with a device for photographing the data of photo-taking comprising: data rings of transparent material carrying indicia thereon, said camera having a film chamber and a light-proof frame, said data rings being disposed between the film chamber and the light-proof frame, display rings connected to said data rings for operating them exteriorly of said camera, said display rings carrying thereon indicia identical with those on said data rings to enable an operator to observe them exteriorly of said camera, a lamp for illuminating said indicia on said data rings, an optical system for directing the images of said indicia on said data rings illuminated by said lamp to a part of a focal plane of an objective lens, a slit provided between said data rings and said optical system for directing a selected set of said indicia to said optical system, a shutter mechanism, and a time control device actuated by releasing said shutter for turning said lamp on for a predetermined length of time, said time control device being adjustable in accordance with the sensitivity of a film used in said camera, and having a main switch for preparing said camera for data photographing, a data field display member capable of shifting from and into a field of a finder of said camera, said data field display member shifting in response to the closing and opening of said main switch, thereby indicating whether data photographing can be effected or not.

Claim 7

A camera as defined in claim 4, wherein said time control device is adjustable in accordance with the sensitivity of a film used in said camera.

Claim 8

A camera as defined in claim 4, wherein said time control device comprises a time constant circuit actuated by a start switch which in turn is short-circuited in association with releasing of said shutter.

Claim 9

A camera as defined in claim 4, wherein said data rings have their outer wall surfaces wrapped with films having printed indicia thereon.

Claim 10

A camera as defined in claim 4, wherein said lamp is disposed within said data rings, and said data rings and said display rings are in engagement with each other by means of gears provided along the outer circumferences thereof, both of said rings having their axes of rotation disposed parallel to the length of the film charged in said camera.

Claim 11

A camera as defined in claim 4, wherein each of said data rings has its entire circumference comprising a data carrier portion and a gear portion, said data carrier portion being wrapped with a film having printed indicia thereon, said film being secured to said data carrier portion by wedging the opposite ends of the film into recesses provided by said gear portion.

Claim 12

A camera provided with a device for photographing the date of photo-taking comprising: data rings of transparent material carrying indicia thereon, said camera having a film chamber and a light-proof frame, said data rings being disposed between the film chamber and the light-proof frame, display rings connected to said data rings for operating them exteriorly of said camera, and carrying thereon indicia identical with those on said data rings, said display ring being disposed at the bottom of said camera and said indicia being observed from the front of said camera, a lamp for illuminating said indicia on said data rings, an optical system for directing the images of said indicia on said data rings illuminated by said lamp to a part of a focal plane of an objective lens, a slit provided between said data rings and said optical system for directing a selected set of said indicia to said optical system, a shutter mechanism, and a time control device actuated by releasing said shutter for turning said lamp on for a predetermined length of time, said time control device being adjustable in accordance with the sensitivity of a film used in said camera, and having a main switch for preparing said camera for data photographing, a data field display member capable of shifting from and into a field of a finder of said camera, said data field display member shifting in response to the closing and opening of said main switch, thereby indicating whether data photographing can be effected or not.

Claim 13

A camera provided with a device for photographing the date of photo-taking comprising: data rings of transparent material carrying indicia thereon, said camera having a film chamber and a light-proof frame, said data rings being disposed between the film chamber and the light-proof frame, display rings connected to said data rings for operating them exteriorly of said camera, and carrying thereon indicia identical with those on said data rings, said display ring being disposed at the bottom of said camera and said indicia being observed from the front of said camera, a lamp for illuminating said indicia on said data rings, an optical system for directing the images of said indicia on said data rings illuminated by said lamp to a part of a focal plane of an objective lens, a slit provided between said data rings and said optical system for directing a selected set of said indicia to said optical system, a shutter mechanism, and a time control device actuated by releasing said shutter for turning said lamp on for a predetermined length of time, said time control device being adjustable in accordance with the sensitivity of a film used in said camera, and having a main switch for preparing said camera for data photographing, a data field display member capable of shifting from and into a field of a finder of said camera, said data field display member shifting in response to the closing and opening of said main switch, thereby indicating whether data photographing can be effected or not.