Abstract: A an electric machine tool having a body to which a work tool is attached, a motor, and a battery. The body has a motor receiving chamber, a battery receiving chamber opening through an outer surface of the body, and a communication path through which the battery receiving chamber is in communication with the motor receiving chamber. A first air inlet opening is formed between the inner edge of an opening of the battery receiving chamber and the outer periphery of the battery disposed in the battery receiving chamber. Further, an inflow port of the communication path opens to an inner side surface of the battery receiving chamber and an air filter is fitted over the inflow port.

Abstract: A chain saw (1) (an electric machine tool) comprises a body (10), to which a cutter (a work tool) (20) is attached, a motor (30), and a battery (50). The body (10) has a motor receiving chamber (15), a battery receiving chamber (16) opening through an outer surface of the body (10), and a communication path (17), through which the battery receiving chamber (16) is in communication with the motor receiving chamber (15). A first air inlet opening (81) is formed between the inner edge of an opening of the battery receiving chamber (16) and the outer periphery of the battery (50) disposed in the battery receiving chamber (16). Further, an inflow port (17a) of the communication path (17) opens to an inner side surface of the battery receiving chamber (16) and an air filter (70) is fitted over the inflow port (17a).

Abstract: An electronic camera comprises an interface unit for cable connection with the computer, an information acquisition unit that acquires network information related to setting of the wireless network from the computer that has been connected to the electronic camera by a cable with using the interface unit, a profile creation unit that creates a profile in which information for connection to the computer via the wireless network is recorded, based upon the network information that has been acquired by the information acquisition unit, a profile storage unit that stores therein the profile created by the profile creation unit, and a wireless connection unit that connects the electronic camera to the computer via the wireless network, based upon the profile that is stored in the profile storage unit.

Abstract: An alarm system comprising a sensor which detects a human body in a fixed detection area and outputs signals, a delay timer circuit which outputs signals after passing a fixed delay time by turning on an alarm switch, a two input AND circuit in which output signals of the delay timer circuit and the sensor are entered, a latch circuit with a delay timer which outputs signals after passing a fixed delay time from when output signals of the two input AND circuit are entered and keeps the signals being outputed until entry of reset signals.

Abstract: A structural element for use as a component part of a building, comprising a pair of parallel elongated rectangular side plates having opposite surfaces spaced a distance apart from each other and connecting means disposed between the side plates so as to rigidly connect the side plates in the spaced-apart relation. The connecting means can be a single elongated rectangular flat plate having its opposite longitudinal side edges fixed to the opposite surfaces of the side plates along the center lines thereof so as to form the side plates and the connecting plate into an integral element of an H-shaped cross section. The connecting means can also be a channel member of a U-shaped cross section comprising a base plate and a pair of side walls the outer surfaces of which are fixed to the opposite surfaces of the side plates so as to form the side plates and the connecting plate into an integral element of a U-shaped cross section. A plurality of U-shaped channel members may also be used.