Abstract: A multistage lock apparatus has a base, a disk holder, two selecting devices, two disk sets and at least one interfering element. The base has a mounting panel and a central tube. The disk holder is connected to the base and has a mounting beam, two extending beams, a middle beam, a connecting beam and two mounting spaces. The selecting devices are rotatably connected to the base. The disk sets are respectively mounted on the selecting devices in the mounting specs of the disk holder and each disk set has a driving disk and at least one driven disk. The at least one interfering element is mounted securely on the disk holder and each of the at least one interfering element has a mounting tab and two elastic panels.

Abstract: A low-profile, binary, sliding tumbler, user-settable combination lock of few parts can be easily and quickly opened, even in the dark. The lock generally comprises a stationary case or frame including a bottom plate, a middle plate and a top plate, a plurality of laterally sliding binary tumblers, and a longitudinally sliding bolt. The tumblers have a bearing portion sandwiched for lateral sliding movement between the top plate and the middle plate. Each tumbler has a handle extending upward and a locking member extending downward for selective engagement with transverse channels in the bolt. When the bolt is disengaged, the top plate can be removed and the tumblers can be changed or exchanged so as to change the combination. The lock may be modified to include any number of tumblers in multiple rows such that the combination may be very large.

Abstract: A shift lever device in which, by the integration with a key cylinder, a reduction in the use of space, simplification, cost reduction and weight lightening can be achieved. The shift lever device is such that the lever supported by a lock body that houses the key cylinder, and a first cam and second cam are provided integrally with the key cylinder. A shift lock pin and starter lock pin are provided in the lock body, and the first insertion hole, in which the shift lock pin is inserted by the first cam, and a second insertion hole and third insertion hole in which a starter lock pin is inserted by the second cam, are provided in a detent plate fixed in the shift lever. As a result, the shift lever device is integrated with the key cylinder and, for this reason, a reduction in the space for the mounting thereof, and moreover, as the connector components with the vehicle become unnecessary, a simplification, cost reduction and weight lightening, can be achieved.

Abstract: An electromagnetically controllable safety lock includes a locking bar which moves a slider, which is provided with teeth and which carries a blocking plate equipped with a passage pin channel. The blocking plate is coupled via a spring to a control plate, which has an angularly offset passage pin channel. The control plate supports an armature, which can be held by an electromagnet, fixed to the housing when the locking bar is subjected to a control movement. Both channels are aligned with the lock axis during an opening action so that the passage pin has a free path.

Abstract: The improved guard plate of this invention is used to protect the cylinder of a lock. It includes a relatively flat body, attached to the door in the vicinity of the cylinder, and a disc rotatably mounted between the door and the flat body. In an open position, an opening in the disc permits access to the cylinder; and, in the closed position, the solid portions of the disc do not permit access to the cylinder. In adition, rotatable fingers are provided so as to lock the rotatable discs in either the open or closed position. Further, a stud extends from each of the rotatable fingers into and through the door. On the end of each stud is an electrical contact which may come into intermittent contact with an electrical contact positioned on the inside surface of the door. Thus, rotation of the rotatable fingers in the incorrect direction or too far in the correct direction will cause touching of the two electrical contacts and completion of an electrical circuit which will activate an alarm.

Abstract: The improved guard plate of this invention is used to protect the cylinder of a lock. It includes a relatively flat body, attached to the door in the vicinity of the cylinder, and a disc rotatably mounted between the door and the flat body. In an open position, an opening in the disc permits access to the cylinder; and, in the closed position, the solid portions of the disc do not permit access to the cylinder. In addition, rotatable fingers are provided so as to lock the rotatable discs in either the open or closed position.

Abstract: A door lock, particularly appropriate for a hotel or motel room, which is effectively operated from either the room side or the corridor side to lock the door closed for security purposes, and from the latter or corridor side, additionally is effective to terminate electrical services within the room, e.g. the air conditioner, to thereby minimize the wasteful use of electricity.

Abstract: An improvement in a locking system of the type having a series of reference combinations arranged serially upon a tape. A combination entered into said system is compared with the reference combination, and if both combinations are complementary, a lock in the system is released.The improvement comprises apparatus for preventing the unlocking of the system when all the reference combination setting fingers are depressed, or alternately when all the reference combination setting fingers are in a non-depressed position.

Abstract: An improvement in a locking device of the type having a series of reference combinations arranged serially upon a tape. A combination is entered into the system by a set of push buttons. The combination entered is compared with the reference combination. If both combinations are complementary, the system can be unlocked. The improvement prevents the unauthorized ascertainment of the combination needed to release the device. An isolation or restraining bar acts as a buffer between an internal gate and a set of tumbler levers. When an actuator knob is turned to unlock the system, the tumbler levers normally will engage with the gate when the combination push buttons are not set to the proper combination. The combination then becomes ascertainable, because the tumbler levers that require actuation, transmit movement to the push buttons when contacted by the gate.