Abstract: An exposure control method and apparatus for a camera having a two-area divided brightness measurement system. A central light value is determined based on a central area brightness of a photographic scene, and a peripheral light value is determined based on a peripheral area brightness of the scene. After determining by comparison between the central and peripheral light values whether the scene is back-lighted or front-lighted, a correction coefficient specific to back-lighted scenes or that specific to front-lighted scenes is read from a memory. An exposure value suitable for a main subject is calculated according to the following equation:Es=log.sub.2 {1-(1-.alpha.).sub.2.sup.LVb-LVa }-log.sub.2 .alpha.+LVawherein Es represents the exposure value and .alpha. represents the correction coefficient.

Abstract: An exposure control method and apparatus for a camera having a two-area divided brightness measurement system. A central light value is determined based on a central area brightness of a photographic scene, and a peripheral light value is determined based on a peripheral area brightness of the scene. After determining by comparison between the central and peripheral light values whether the scene is back-lighted or front-lighted, a correction coefficient specific to back-lighted scenes or that specific to front-lighted scenes is read from a memory. An exposure value suitable for a main subject is calculated according to the following equation:Es=log.sub.2 {1-(1-.alpha.)2.sup.LVb-LVa }-log.sub.2 .alpha.+LVAwherein Es represents the exposure value and .alpha. represents the correction coefficient.

Abstract: A pair of air inlet openings and a pair of air introduction paths are formed in a leftwardly and rightwardly symmetrical relationship on left and right side portions of a windshield. The air introduction paths are each formed as a smooth continuous curved face in a transverse direction, and a body center side curved face of the air introduction path is formed more moderate relative to an outer side curved face. When surface air flows along the surface of the front face flow on the air introduction paths since the body center side curved faces are moderate, exfoliation occurs less likely, and the external air admission efficiency of the air inlet openings is raised.

Abstract: The camera shutter comprises two shutter blades which have first opening forming portions and second opening forming portions capable of alternatively forming two exposure openings different in area on an exposure aperture. These shutter blades are opened and closed by a shutter blade opening and closing lever which can be retained at a neutral position by a closing spring. The shutter blade opening and closing lever is turned by a motor which starts from the neutral position rotates in one of two directions opposite to each other. The lever is equipped with a opening spring capable of exerting a resilient force in the rotating directions of the opening and closing lever. The resilient force of the opening spring is weaker than that of the closing spring. The first opening forming portions form an exposure opening when the motor is started in a first direction and the second opening forming portions form an exposure opening when the motor is started in a second direction.

Abstract: A main driving member coupled with a stepping motor is advanced or returned by normal and reverse rotation of the stepping motor. When the main driving member is advanced, a lens driving member follows the main driving member to be advanced to a focused position and is engaged at the focused position. A shutter mechanism is opened and closed in the course of the returning of the main driving member and subsequently the engagement of the lens driving member is released in the course of the returning of the main driving member so that the lens driving member is returned to its initial position. Any one of a sensor for detecting the initial position of the main driving member or a sensor for detecting the initial position of the lens driving member is provided. By employing one of the two sensors, a single sensor is used to confirm the operation of both of the lens driving member and the main driving member.

Abstract: A mat comprising a cushion base having a plurality of block plates each having cushion property and foldably connected together. A cushion member covers the upper surface of the cushion base, and the cushion base and the cushion member are detachably connected. The block plates are connected together at adjacent upper surfaces thereof and movably foldable about a centrally disposed fold line and a plurality of parallel transverse fold lines intersecting the longitudinal fold line. The fold lines are formed by slots which facilitate separation of the sehments when folded.

Abstract: A camera including operable means changeable from an initial position to a predetermined position and vice versa, drive means for driving the operable means, detection means for detecting that the operable means reaches the predetermined position, control means for controlling the drive means, whereby the operable means is forcibly reset in the initial position when an erroneous operation occurs. The camera detects the occurrence of erroneous operations and automatically suspends the driving of the operable means so as to eliminate the influence of erroneous operations and assure accurate photography.

Abstract: A driving unit using an electrostrictive element drives mechanical members such as, for example, a diaphragm and a shutter or a shutter blade having the function of a diaphragm blade by deformation of the electrostrictive element produced when a voltage is applied to the element, and is adapted to obtain a desired deformation quantity from the electrostrictive element regardless of the magnitude of an initial deformation quantity due to hysteresis of the element. A reference switch such as, for example, a photointerrupter operates when a predetermined reference deformation quantity is obtained in an area where the deformation quantity changes linearly in respect to variation of an applied voltage.

Abstract: Method for producing molded metallic honeycomb structures of high physical strength and porosity, the method comprising forming a honeycomb structure by extruding through a die a kneaded mixture of a metal powder and a binder capable of forming a supporting bone structure for the metal powder upon application of heat, and, after drying, sintering the honeycomb structure.

Abstract: The upper back portion of a seating sheet is suspended from the handle of a baby carriage by a slidable clip arrangement including a first loop clip suspended from the carriage handle and a second loop clip adjustably secured to the upper portion of the seating sheet.

Abstract: A novel heating medium comprising 1,1-diphenyl ethane is provided for use in heating processes. Said heating medium has good thermal stability, a high boiling point and a low melting point. It is applicable over a wide range of temperatures and easily degradable by microorganisms. The oily substances, by-produced in the step of separating ethyl benzene from polyalkyl benzenes in production of ethyl benzene from the reaction between benzene and ethylene, may be available for preparation of said heating medium.