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 door handle device and latch mechanism including a device body installed on a door panel. The device body is provided with a handle grip connected thereto by a first pivot pin and has an actuating lever connected to the device body through the first pivot pin, which is mounted unitarily with the handle grip through a second pivot pin. A reset lever is pivotally secured to the handle grip through the second pivot pin acting on the handle grip. A retractable latch mounted in the device body has a lock lever connected thereto by a third pivot pin to check the rearward slide of the latch by engagement with a receiving portion in a bottom plate of the handle device. A reset spring in the handle grip holds the reset lever and a rotatable lock cam in engagement, and also holds the reset leer and the lock lever in engagement. A leaf spring retained in the device body bottom plate releases engagement of the lock lever and bottom plate receiving portion.

Abstract: A handle device for a door which is formed of an assembly installed in a door panel and has a handle grip connected thereto by a pivot pin. A latch is retractably mounted to the assembly and interlocked with the handle grip. A lock is disposed within the assembly and is provided with a cam secured to a rotor of the lock which checks the receding slide of the latch. The lock cam is formed in the shape of a disc and is closely fitted in a circular recess of the assembly.

Abstract: A gravity door hinge in which a cam is inserted non-rotatably into the lower half of a socket provided in a fixed member, the upper end of an axial rod is inserted non-rotatably into an axial bore hole provided in a rotational member, a cam follower is fitted rotatably around the middle of the axial rod by inserting the axial rod through a central hole bored in the cam follower, the lower half of the axial rod is inserted rotatably into an axial hole formed by hollowing out the center of the cam, the cam follower is fitted rotatably into the upper half of the socket, on top of the cam housed in the lower half of the socket so that an inclined cam surface formed on the lower end of the cam follower comes into close contact with an inclined cam surface formed on the upper end of the cam, and the base of the socket is completely closed.

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..

Abstract: Disclosed herein is a push-rotation type key switch device which consists essentially of a lock main body having a rotor which is not capable of sliding in an axial direction, a switch fitted to the rear of the lock main body and a switch operating cam caused to slide backward in the axial direction of the rotor when a key is inserted into the rotor. When the cam is rotated integrally with the rotor in either normal or reverse direction, the switch is turned on and off.

Abstract: A handle device for a door which is formed of an assembly installed in a door panel and has a handle grip connected thereto by a pivot pin. A latch is retractably mounted to the assembly and is interlocked with the handle grip. An actuating lever is pushed by the handle grip to move the latch. A reset lever drives the actuating lever when pushed by a push rod extending inside the door. A lock mounted on the assembly has a cam secured to a rotor, serves to release the engagement between a lock plate which is secured to the assembly and adapted to check the slide of the latch, and the latch. When the push rod turns the reset lever, engagement between the lock plate and the latch is released and the latch slides and is retracted by turning the actuating lever.

Abstract: A lock for a refrigerator or the like which can be unlocked from the inside thereof comprises a handle unit mounted on a door and a keeper mounted on a body frame wall of the refrigerator or the like. The keeper is constituted by a fixed seat and a movable body having its outer proximal end pivotally attached to the outer end of the fixed seat. A follower pin provided at an intermediate portion of a lock shaft is slidably urged by a spring toward the fixed seat inner end so as to abut on an inclined cam surface formed on the outer end surface of the fixed seat inner end.

Abstract: A door handle unit in which a movable handle is linearly slidably fitted in a case secured to a door, a latch coming into engagement with and disengagement from a keeper secured to a fixed frame member is pivoted to the case, engagement of the keeper and the latch is held by means of a spring for urging the latch to be rotated, an actuating link coupled to an inner end portion of the movable handle is engaged with the latch, and the latch is disengaged from the keeper along with a linear pulling movement of the movable handle.Since the movable handle is operated in a linear sliding manner, there do not occur troubles of breakage or distortion in the handle unit.

Abstract: A key operated switch lock assembly comprising one tumbler lock, a plurality of rotary switches, and at least one key. The switches are supported rearward of a lock housing of the lock, and the key has an elongated portion which protrudes rearward of the lock housing. Each switch comprises a base plate having a pair of spaced stationary contacts, a rotary disk having a moving contact, and a casing to receive the disk and the base plate. The elongated key portion has at least one operating projection which can turn the disk. When the disk is rotated through a given angle, the moving contact comes into contact with one of the stationary contacts. The other of the stationary contacts always touches the moving contact. The key operated switch lock assembly is used for controlling the operation of important devices such as an electronic computer and the like.