Abstract: An artificial knee joint 1 includes: an insert member 2 embedded in a part of a joint surface of a medial condyle MC or lateral condyle LC of a tibia T; and a bridge member 3 disposed underneath the insert member 2, and having a length that allows both ends thereof to be anchored to a cortical bone of a tibia T.

Abstract: An electronic camera is provided which, in photographing, obtains size information about an object, generates the size information, or size data calculated through arithmetic operation, or a scale pattern based on the size data, and records the scale pattern on a recording medium in the same recording area as an object image or in a separate area made correspondent to a recording area for the object image, and which, when size display is instructed during photographing or in reproduction, displays a scale (including a pattern representing the scale, indications representing the scale by characters and/or figures such as graduation numerals, and color-coded indications representing the scale) together with the object image on the same screen.

Abstract: There is connected to a video camera having automatically controllable shooting features a memory unit in which a program for setting those features is stored. A control circuit in the camera reads out the program from the memory unit upon actuation of a program button. The control circuit is responsive to actuation of the shooting start/stop button to control the shooting features under the conditions and sequence prescribed by the program. The shooting sequence proceeds in response to each actuation of the shooting start/stop button. Upon actuation of a program skip button or a pause program button, the shooting feature to be performed next in the program may be skipped or reserved. In this manner, the operator may learn or make an effective use of the shooting features of the camera merely by actuating the shooting start/stop button.

Abstract: A video tape editing apparatus for performing an insertion editing operation in a system in which audio signals are recorded together with video signals on a video track in accordance with a helical scanning system, the video tape recorder editing apparatus including: a rotating head assembly for rotating at a predetermined speed; a first head carried on the rotating head assembly for recording signals on the track; a second head carried on the head assembly at a position upstream relative to the first head along the rotating direction of the head assembly; a recording circuit for supplying video signals to the first head; and an audio circuit for reading audio signals from the track through the second head and for supplying the readout signals together with video signals from the recording circuit to the first head.

Abstract: In a field/frame conversion system in which a field signal recorded on a track of a recording medium is repeatedly reproduced, a field signal delayed by 1/2 horizontal scanning duration and a directly provided field signal are alternately selected by a switch at each vertical scanning duration, and one of the field signals is formed by an arithmetic mean of a signal delayed by 1 horizontal scanning duration and a directly provided signal, to provide a frame signal, a flicker preventing circuit device in a field/frame conversion comprises a circuit provided in a front stage of an arithmetic mean circuit of the field/frame conversion system for bringing a gamma value of the field signal to 1, and a gamma circuit provided in a rear stage of the arithmetic mean circuit for returning the gamma value of the field signal to its original value.

Abstract: A magnetic recording and reproducing system is provided with a cleaning mechanism wherein a cleaning pad contacts a rotary magnetic head to clean said magnetic head during inertial rotation of said magnetic head.

Abstract: A recording error-prevention system in which an abnormal position of a camera set in a continuous-recording mode of operation, relative to the horizontal position, is detected by a position-sensing device and an alarm is given by an alarm device on the condition of this detection and, if the alarm is not cleared for a predetermined period of time, recording is stopped by an auto-stop device.

Abstract: A rotary magnetic head assembly for use in recording and playing back video signals including a rotary head drum, a stationary head drum, and magnetic heads. The rotary head drum is supported by a driving shaft and has an outer surface which is generally cylindrical. The rotary drum is rotatable when driven by the shaft. The stationary head drum is disposed coaxially with the rotary drum, and has an outer surface which is generally cylindrical and substantially equal in diameter to the outer surface of the rotary drum. The rotary drum has a first surface opposing the stationary drum with shape formed by a generatrix not perpendicular to the shaft such as a conical or cylindrical. The stationary drum has a second surface opposing the first surface of the rotary drum. The second surface is generally of a shape about the shaft, which is complementary to the first surface to form an air gap between the rotary and stationary head drums through which air flows to form an air film on the outer surfaces of the drums.