Abstract: A camera includes a motor, a first planetary gear which revolves on the basis of an output rotation of the motor, a second planetary gear which revolves on the basis of the output rotation of the motor, a first camera operating mechanism which engages with the first planetary gear by the revolution of the planetary gear caused by a rotation of the motor in a first direction, a second camera operating mechanism which engages with the second planetary gear by the revolution of the second planetary gear caused by the rotation of the motor in the first direction, and a selector for selectively preventing the revolution of either of the first and second planetary gears. The selector selectively permits the operation of either of the first and second camera operating mechanisms during the rotation of the motor in the first direction.

Abstract: An optical information recording/reproducing apparatus provided with a device for irradiating an information track of an optical information recording medium with a preheating light beam. Simultaneously, a recording/reproducing light beam irradiates a light spot of the preheating light beam on the recording medium. The light intensity of the preheating light beam is varied in accordance with the environmental temperature of the apparatus detected by a detector. By such a construction, the recording/reproducing condition of information is kept constant, irrespective of the environmental temperature.

Abstract: The device for determining a misfiring of a cylinder of a multicylinder engine determines that a misfire has occurred when a change in the angular velocity of the crank shaft detected by a crank angle sensor mounted to the engine body becomes larger than a predetermined set value, and to prevent a misjudgement caused by engine vibration, the device changes the mode of operation for determining the misfire when the engine is operated in a region in which the engine vibration is increased, i.e., in this operating region, the determination of the misfire is not carried out, or the above predetermined set value for the change in angular velocity is increased.

Abstract: In a misfire detecting apparatus for a multicylinder internal combustion engine, a rotational signal outputting unit outputs a rotary signal at every predetermined rotary angle, and a tentative misfire decision unit tentatively decides, on the basis of the rotary signal, whether or not misfire has occurred in each cylinders of the engine. A tentative misfire number counting unit counts the number of tentative misfires decided for respective cylinders, and a counting result storage unit stores the counting results. After a given number of tentative misfire decisions have been made, it is decided that misfire has actually occurred, only if the counting result, for a part of the cylinders, among the counting results for respective cylinders stored in the counting result storage unit is larger than a predetermined number.

Abstract: A motor-driven camera includes a motor, a mirror driving mechanism which uses the output of the motor as a drive source and is arranged to move a movable mirror from a view-finder sight position to an exposure-allowing retracted position according to the rotation of the motor in a first direction and to bring the mirror back to the view-finder sight position according to the continuous rotation of the motor in the first direction, a film transporting mechanism which uses the motor output as a drive source and transports the film for a next frame photographing according to the motor rotation in a second direction, a clutch which performs a change-over action in such a way as to cause the motor output to be transmitted to the mirror driving mechanism according to the motor rotation in the first direction and to the film transporting mechanism according to the motor rotation in the second direction, and a control circuit which controls the motor rotation and is arranged to cause the motor to rotate in the first

Abstract: An apparatus for detecting occurrence of misfire in a multicylinder internal combustion engine detects a rotational speed of the engine in each expansion stroke of each cylinder, calculates a change of the engine rotational speed fluctuation quantity in accordance with a value of the detected rotational speed, and sets a misfire determination value for each cylinder based upon a determination result of the engine operating condition. Misfire determination is made for each cylinder based upon the misfire determination value for each cylinder and the change of the rotational speed fluctuation quantity, thereby elevating the accuracy of detecting occurrence of misfire in each cylinder.

Abstract: A camera includes a motor, a first planetary gear which revolves on the basis of an output rotation of the motor, a second planetary gear which revolves on the basis of the output rotation of the motor, a first camera operating mechanism which engages with the first planetary gear by the revolution of the planetary gear caused by a rotation of the motor in a first direction, a second camera operating mechanism which engages with the second planetary gear by the revolution of the second planetary gear caused by the rotation of the motor in the first direction, and a selector for selectively preventing the revolution of either of the first and second planetary gears. The selector selectively permits the operation of either of the first and second camera operating mechanisms during the rotation of the motor in the first direction.

Abstract: A motor-driven camera includes a motor, a mirror driving mechanism which uses the output of the motor as a drive source and is arranged to move a movable mirror from a view-finder sight position to an exposure-allowing retracted position according to the rotation of the motor in a first direction and to bring the mirror back to the view-finder sight position according to the continuous rotation of the motor in the first direction, a film transporting mechanism which uses the motor output as a drive source and transports the film for a next frame photographing according to the motor rotation in a second direction, a clutch which performs a change-over action in such a way as to cause the motor output to be transmitted to the mirror driving mechanism according to the motor rotation in the first direction and to the film transporting mechanism according to the motor rotation in the second direction, and a control circuit which controls the motor rotation and is arranged to cause the motor to rotate in the first

Abstract: A motor-driven camera of the prewind type arranged to perform a preliminary film winding action continuously from an automatic film loading onto a take-up spool before photographing and, thereafter, to rewind the film for every photographing shot includes an electric film counter arranged to count the number of frames of the film according to the transport of the film, a detecting device for detecting the movement of the film, and a detecting circuit which detects a cause for the immovable state of the film when the detecting device has detected the immovable state of the film. The detecting circuit is arranged to determine the preliminary film winding action to have been completed when a counted value of the electric film counter is greater than a predetermined value, or to determine the automatic film loading to have failed when the counted value is not greater than the predetermined value.

Abstract: A motor-driven camera of the so-called prewind type in which a film is preliminary wound to effect a prewinding action and then the film is rewound for every photographing shot, includes an electric film counter which counts the number of frames on the basis of a signal generated according to the movement of the film; a control circuit which determines the number of photographable frames on the basis of a counted value of the electric film counter; a detection circuit which detects the completion of the prewinding action by detecting that the film ceases to move; and a judgment circuit which is arranged to detect the state of the above-stated signal after the lapse of a predetermined period of time from the completion of the prewinding action detected by the detection circuit, to judge whether or not a change in the counted value of the electric film counter is necessary.

Abstract: An alarm signalling electronic timepiece including an alarm signalling circuit which generates alarm signal at a preset hour, and a sound circuit which generates signalling sound by the alarm signal. This timepiece includes a timer counter which can memorize and subtract preset time and which can supply the alarm signal to the sound circuit after the set time elapses from the start of down count from a a time start circuit which holds the time memorized in said timer counter until the alarm signal from the alarm signalling circuit changes and which starts counting in said timer counter when the alarm signal changes, and external switches which externally switch over to work or cancel said time start circuit, whereby plural and different alarm signalling hours can be set with more simplicity.

Abstract: The present invention provides a timpiece including clock and timer sections which can be operated solely or in association with each other. When the clock and timer sections are combined with each other, the start of the timer section is controlled by an alarm signal from the clock section such that two different alarm functions can be attained. The alarm signal is preferably in the form of an alarm output or alarm pause output. The clock and timer secitons may be connected into a unit or mechanically disconnected from each other. When the clock section can be separated from the timer section, the state of connection therebetween and the life of a battery used can warningly be indicated.

Abstract: A clock adjustment switch system for a clock having a display panel, such as an optoelectronic or liquid crystal display panel, and a transparent cover fit over the display panel. Transparent touch-switches for adjusting the timekeeping or other function of the clock are provided on the transparent cover and luminous indicator means are provided at corresponding positions on the display panel. The time switches are made operative and the luminous indicator means are lit only when the clock adjustment function has been made operative by another switch provided on the transparent cover.