Canon Kabushiki Kaisha

Noritsugu Hirata

Hiroyuki Takimoto

Tomoshi Takigawa

Masamichi Toyama

Hidekazu Okajima

Toshikazu Ichiyanagi

Kazuo Ishikawa

Keiichi Sakaguchi

Masaya Maeda

Akimasa Nishimura

Hideto Iwama

Sadahiko Tsuji

Masahide Hasegawa

Hidetoshi Matsuoka

Kiyoshi Takahashi

Mitsuhiro Otokawa

Kazuo Tanaka

Shigeru Ogino

Tatsuzo Ushiro

Yoshio Komine

Akira Tajima

Mamoru Shimazaki

Yasutsugu Yamada

Mitsutoshi Ogiso

A recording and reproducing apparatus comprising a reproducing member for reproducing number-of-times-of-copy information and possible-number-of-times-of-copy information recorded on a recording medium, a renewing circuit for renewing the number-of-times-of-copy information reproduced by the reproducing member, a determining circuit for determining whether or not it is possible to perform copying by comparing the possible-number-of-times-of-copy information with the number-of-times-of-copy information, and a recording member for recording the number-of-times-of-copy information renewed by the renewing circuit on the recording medium.

Recording and reproducing apparatus

Recording apparatus with copy control based on copies made and allowed

Recording and reproducing apparatus adapted to selectively control the

A multi-channel recording apparatus in which n rotary heads (n is 3 or higher integer) are arranged on the outer peripheral edge of a drum is evenly spaced relation, and a tape-shaped recording medium is trained round the drum over an angular range of at least 360.degree..times.(1-1/n), while recording (n-1) channels of a signal on the recording medium by using the (n-1) of the n heads which are simultaneously tracing on the medium.

Recording apparatus for an information signal with a plural kinds of

A multi-channel recording apparatus in which n rotary heads (n is 3 or higher integer) are arranged on the outer peripheral edge of a drum in evenly spaced relation, and a tape-shaped recording medium is trained round the drum over an angular range of at least 360.degree..times.(1-1/n), while recording (n-1) channels of a signal on the recording medium by using the (n-1) of the n heads which are simultaneously tracing on the medium.

Multi-channel recording apparatus using a plurality of heads in turn

A flat brushless motor having magnetoresistive elements includes a flat multipole permanent magnet mounted on a rotary shaft, a yoke member positioned in such a manner as to face the permanent magnet, and coils. The brushless motor also incorporates a plurality of zig-zag patterns of magnetoresistive elements which are formed on a plane perpendicular to the axis of the rotary shaft.

Brushless motor

A recording and reproducing apparatus in which an information signal is recorded in the first area of a track on a recording medium, a pilot signal is recorded in the second area for tracking control. When a reproducing head is on the second area, tracking by a reproducing head in the first area is controlled by the pilot signal reproduced by the reproducing head.

This invention relates to a cinematographic camera and more particularly to a method of controlling operation of the cinematographic camera in accordance with a sequence of instructions programmed to carry out a photographic process. In order to carry out a plurality of operating modes by use of one and the same control circuit, the program is planed to include a plurality of different photographic process program sections along with a selection program for selection of any one of said process program sections.

Cinematographic camera

A video recording system includes a combination of a cassette type video recorder and a portable video camera, in which the recorder is provided with a battery for supplying power to both parts. The camera has first and second switches which are so made that the switches are operated in sequence for controlling an operating condition of the recorder and camera. When the first switch is actuated, a shooting operation of the camera is started and the recorder is set into a stand-by state for recording. Then by an actuation of the second switch a recording operation of the recorder is started.

Video recording system

A three-motion picture camera is equipped with a shutter opening angle adjusting device capable of changing the opening angle of a shutter including a plurality of concentrically disposed shutter blades from 0.degree. to a predetermined opening angle by changing on relative position of the shutter blades. The opening angle adjusting device includes a mechanism for varying the relative position of the shutter blades, a cam mechanism for actuating said varying mechanism, and a motor for exclusively actuating the cam mechanism. The adjusting device is further provided with a control device for detecting the speed of the motor and controlling the rotational speed of the motor to a substantially constant speed, whereby the camera can perform fading photography which is assured of fading time and overlap photography having a fading effect.

Motion picture camera

A motion picture camera is equipped with a shutter opening angle adjusting device capable of changing the opening angle of a shutter including a plurality of concentrically disposed shutter blades form 0.degree. to a predetermined opening angle by changing on relative position of the shutter blades. The opening angle adjusting device includes a mechanism for varying the relative position of the shutter blades, a cam mechanism for actuating said varying mechanism, and a motor for exclusively actuating the cam mechanism. The adjusting device is further provided with a control device for detecting the speed of the motor and controlling the rotational speed of the motor to a substantially constant speed, whereby the camera can perform fading photography which is assured of fading time and overlap photography having a fading effect.

A video tape recorder allows pictures to be taken and recorded with a video camera connected to the recorder. The recorder has a push button which is activatable to stop recorder operation, and has a circuit for nullifying or defeating the operation of the stop push button. The nullifying circuit is controllable by the operation of the video camera connected to the recorder, and is arranged to nullify the operation of the stop push button at least when the video camera is performing a picture-taking operation.

Video tape recorder arranged to be connected with a video camera

A motion picture camera provided with an automatic focusing device is arranged to have an image of light emitted from an infrared ray emitting diode projected toward an object to be photographed, and to detect an in-focus state by detecting a peak value of output voltage from a light sensitive element as the direction of the emitted light is varied by a rotatable distance measuring cam. The automatic focusing device is adapted for a zoom lens assembly and is arranged to drive an imaging lens, supported by a shaft which is guided by plate shaped masks at both ends of the lens assembly, in the direction of the lens optical axis. The force for driving the imaging lens is kept low, so that the imaging lens can be accurately adjusted by a rotatable focusing cam during a focusing operation. The rotational position of the distance measuring cam, and that of the focusing cam, are provided in the form of resistance values which vary according to the cam lifts, or in the form of digital codes. When digital codes are employed, distance intervals are established so that the depth of field at each interval overlaps an adjacent interval. Satisfactory focusing thus is provided for all distances within any measured interval.

Motion picture camera with automatic focusing device

A motion picture camera having a start sequence digital circuit, by which various component elements in the camera related to photographic operations are sequentially and automatically operated with a predetermined relationship, when the trigger operating member of the camera is actuated, and a stop sequence digital circuit, by which the abovementioned various elements are sequentially and automatically stopped with a predetermined relationship, when the trigger operating member is released.

A camera having a distance measuring optical system and a photograph taking optical system is provided with an optical member carrying body formed by unifying a carrying member carrying at least a part of the photograph taking optical system and a carrying member carrying the distance measuring optical system. The optical member carrying body is molded with a synthetic resin and an internal reinforcement member such as a metal plate.

Growing community of inventors

Yokohama, Japan

Noritsugu Hirata