Abstract: This invention provides a photographic apparatus for successively photographing originals on a photographic film in a continuous web form and subsequently developing the thus exposed film. Said apparatus comprises a camera unit and a processor unit, wherein said camera unit comprising a film chamber for storing the photographic film exposed at an exposing position into a loop form, a feed path for feeding said film in said film chamber into said processor and means for advancing said film into said film chamber. The photographic apparatus of this invention is selectively usable either as a camera for photographing only or as a camera-processor for continuous photographing and development.

Abstract: In an air-to-fuel ratio feedback control system, air-to-fuel ratio of mixture supplied to an engine is controlled to be stoichiometric in response to the oxygen concentration in exhaust gases during normal operating conditions of the engine, whereas it is controlled irrespective of the oxygen concentration during specific operating conditions such as heavy load and no load conditions of the engine. Sensor output signal indicative of the oxygen concentration which is integrated to control the air-to-fuel ratio is cut off and integrator output signal is increased or decreased by a predetermined value during the specific conditions so that the mixture is controlled to be richer or leaner as desired than the stoichiometry.

Abstract: An air-to-fuel ratio feedback control system which normally functions to correct the air-to-fuel ratio of a mixture supplied to an internal combustion engine to a predetermined air-to-fuel ratio in accordance with an output signal of an air-to-fuel ratio detector disposed in an exhaust passage. The system detects an inoperable period of the air-to-fuel ratio detector due to a low engine temperature and stops the feedback correction of the air-to-fuel ratio to prevent erroneous correction. Furthermore, during the full load operation and idling operation the system holds the feedback correction of the air-to-fuel ratio respectively at a little smaller and larger than the stoichiometric ratio irrespective of the output of the air-to-fuel ratio detector and enables to easily return to substantially the stoichiometric one when the engine operating condition returns to normal operation.

Abstract: An internal combustion engine having an air-fuel mixture supply controller is provided with an air-to-fuel ratio detector for detecting the oxygen content in the exhaust gas of the engine and a feedback controller for correcting mixture supply operation of the mixture supply controller in response to the oxygen content. A halt circuit and a hold circuit, being responsive to first and second operating conditions of the engine respectively, are connected to the feedback controller to halt and hold the feedback control, thus causing the mixture supply controller to supply the richer or leaner mixture as desired.