Abstract: A handle device is provided which enables easy and safety opening/closing of a door in a single step without rotation of the handle. The handle device is installed on a casing having a door and a casing frame, and includes a door unit on a door, and a casing frame unit having a hook on a casing frame. The door unit includes a handle section having a handle which can be lifted up or pressed down relative to the door, and a lock which can lock the handle in its lowest position, and a sliding section having a sliding member slidable along the door. The sliding member engages with the handle to slide in response to the motion of the handle, and has a slot which engages with and disengages from the hook in response to the slide of the sliding member corresponding to the motion of the handle.

Abstract: A lockable cap is disclosed which includes a base having an opening penetrating through the base plate, an openable cover pivotably mounted on the base for releasably covering the opening, an elastic member for elastically thrusting the cover in an opening direction for exposing the opening, a latch member for retaining the cover in a closed position with respect to the base against elastic thrust applied by the elastic member, a key-operated lock disposed in the base, a key-for setting and opening the key-operated lock, and a latch releasing member attached to the key-operated lock for releasing the latch member to open the cover when the key is inserted into the lock to open.

Abstract: A locking device with a key-operated lock is disclosed which includes a cylindrical member having a front open end and a rear end, locking means rotatably supported on the rear end of the cylindrical member, the locking means having a locking bar and an engagement member connected with respect to the locking bar, the engagement member being rotatable to turn the locking bar into locking or unlocking position, a key-operated disk tumbler lock, and a cap cylinder casing the disk tumbler lock therein, the cap cylinder with the disk tumbler lock being detachably accommodated in the cylindrical member through the front open end, wherein the cylindrical member has an engagement recess on its inner surface, the cap cylinder has a peripheral surface, and the disk tumbler lock has a lock pin capable of protruding through the peripheral surface and fitting in the engagement recess when the disk tumbler lock is set.

Abstract: A handle device is provided which enables easy and safety opening/closing of a door in a single step without rotation of the handle. The handle device is installed on a casing having a door and a casing frame, and includes a door unit on a door, and a casing frame unit having a hook on a casing frame. The door unit includes a handle section having a handle which can be lifted up or pressed down relative to the door, and a lock which can lock the handle in its lowest position, and a sliding section having a sliding member slidable along the door. The sliding member engages with the handle to slide in response to the motion of the handle, and has a slot which engages with and disengages from the hook in response to the slide of the sliding member corresponding to the motion of the handle.

Abstract: A double-acting locking device of the axial pin tumbler type for joint control. A rotary plug, a control plug, a master plug and a stationary plug fit in contact with each other within a cylinder. Connections and disconnections between those plugs are effected by the actions of top pins, master pins and bottom pins, all of which fit into axial pin holes formed in those plugs and are spring-biased forward. The selection of the connections and disconnections of the plugs is effected by a first key, a second key, and a master key. The rotational directions and angles of the actuating shaft set by the first and second keys are controlled by the actions of front and rear face projections on the control plug, a rear face recess of the rotary plug, and a front face recess of the master plug.

Abstract: A photoelectric key switch device for preventing error of the output timing of electrical signals from a group of light-receiving elements, while operating an electric processing unit by signals that are simultaneously produced. The device is provided with a rotor having a notch that forms optical paths between the elements of a group of light-emitting and light-receiving elements, other than one set of elements, when a key is inserted into the rotor and the rotor is rotated through a pre-determined angle. Another notch forms an optical path between the set of elements and the aforementioned one set of elements when the rotor is additionally rotated through an angle .alpha..