Abstract: A non-commutated linear motor particularly suitable for use as an electric door lock actuator for an automobile is disclosed. The linear motor may include a series of cup-shaped portions each having a winding appropriately connected to provide the desired travel stroke, in a direction determined by polarity of D.C. power applied to the winding, and power for the linear motor or a segmented armature designed to achieve the same flexibility in motor design and assembly.

Abstract: In the system, exits are provided with opening bars and locks. The system has a central post and control boxes. Each control box is associated with an exit and is connected to the central post. Activation of an opening bar initiates the sending of information to the central post by the associated control box. This triggers a first delay To. During this delay, the opening of the exit can be stopped for a further delay Tc. The opening is allowed at the end of the first delay or at the end of the second delay. A third delay Tp can be triggered during the second delay Tc to allow the opening of the exit under question during the third delay Tp and to relock the exit under question at the end of the third delay Tp, by cancelling the effect of the second delay Tc. The system can also operate in the anti-intrusion mode. In particular, it can be used in stores or public establishments of medium area.

Abstract: A comprehensive real estate lockbox system is disclosed which provides a variety of operational features. Some of these features include the ability to: record all accesses to all lockboxes; transfer all or part of such records from the lockboxes to a supervising real estate agency or board; organize and review such records; facilitate operation of lockboxes that are mounted in awkward or poorly lit locations; limit lockbox accesses to preselected agents, agencies or boards; reprogram lockboxes in the field; monitor redundantly the status of the lockbox battery; record diagnostic information on each operation of a lockbox or key; render keys inoperative on predetermined dates; disable unauthorized keys; grant agents from remote real estate boards permission to open certain lockboxes, and; grant different keys different privileges.

Abstract: For controlling a central locking installation and/or theft alarm of a motor vehicle a switch lock installation is provided which comprises at least one lock with mechanical tumblers for the mechanical locking and unlocking of a door or a bonnet of the motor vehicle. The tumblers form a first key secret. The key which blocks the tumblers carries an electrically, magnetically or optically readable information carrier for a second, operationally variable key secret. A reading device detects the information of the second key secret in a position in which the mechanical tumblers of the lock are released. If the key is moved in the opening direction of the lock, a control circuit compares the information read by the reading device with an ideal information stored in a memory circuit and controls the central locking installation and/or theft alarm accordingly.

Abstract: An improved clock lock of the type using an electronic timer circuit as clock mechanism is disclosed. A locking member is actuated toward the unlocked state in response to unlocking signal generated by the electronic timer circuit.

Abstract: An automotive keyless steering shaft lock arrangement includes a stationary housing; an electric motor mounted in the housing; a gearing unit of the profile shifted type operatively connected with the motor; a rotator operatively connected with output shaft of the gearing unit; and a shaft-locking and unlocking bar cooperatable with the steering shaft in case of the required locking stage.The steering shaft is provided with one or more magnets embedded in or mounted on the steering shaft. On the other hand, the stationary housing is provided with one or more magnetically responding switches which are connected to an electronic control circuit adapted for control of the locking and unlocking movement of the bar.

Abstract: A door security system includes a lock that is released by an electronic control unit carried on the door and activated by radiation from an r.f. oscillator in a user's key unit. The key unit, provided on a finger ring, includes one or more photovoltaic devices that convert light energy received from a lamp on the door to electrical power for the r.f. oscillator. The r.f. emission may be binary-code modulated and the control unit then includes an appropriate modulation-code detector. The door unit may also include a light-source that emits coded pulses of infra-red light and then the key unit includes a circuit to detect whether the infra-red light received is of the appropriate code-format as a condition for activation of the r.f. oscillator.

Abstract: A contactless digital key switch is provided which comprises a plurality of printed circuit substrates each having a predetermined number of magnetic sensor chips longitudinally arranged thereon in spaced relation, the printed circuit substrates disposed in the form of polygon prism with the magnetic sensor chips facing inwardly, an actuating key member having one or more permanent magnets longitudinally arranged therein in spaced relation and in coded form, a rotary member adapted to receive the actuating key member and rotate with the same within the polygon prism defined by the printed circuit substrates, and means drivingly connected to the rotary member for permitting rotation of the rotary member with a snap action and holding the rotary member in a position where the permanent magnets face to the corresponding magnetic sensor chips on one of the printed circuit substrates every time the rotary member is rotated by a predetermined angle, whereby a coded signal corresponding to the permanent magnets arra

Abstract: A jewelry show case or similar merchandise container is equipped with a door lock and alarm system which is effective to either automatically lock the access doors of the show case in fully closed positions, or signal an open condition of the doors when an authorized attendant leaves his usual station behind the show case.

Abstract: A lock has a lock cylinder provided with a rotatable core which is normally prevented from rotating by drivers that bridge the shear line between the core and the main body of the cylinder. However, when either first or second keys are inserted into the core, pins within the core are elevated to the shear line so that the drivers no longer prevent rotation of the core. The main body of the cylinder also contains a push rod which is urged into the core by an actuator when the actuator is energized, but is otherwise located out of the core with its inner end flush with the shear line. The core also contains a pin which aligns with the push rod. The first key is incapable of moving the push rod out of the core so that the core may be turned with the first key only when the actuator is de-energized. The second key, however, forces the pin associated with the push rod against the push rod and moves the push rod outwardly to the shear line, even when the actuator is energized.

Abstract: A timelock for bank vault doors and the like is disclosed. The disclosed timelock includes three electronic interval timing devices, each interval timing device including a bank of thumbwheel switches on which the desired minimum interval from the arming of the timelock to the reopening of the bank vault door or the like is retained from day to day unless manually changed. All three of the electronic interval timing devices are started by a switch operated by the timelock arming lever. Each electronic interval timing device includes a numerical display device on which the preset delay interval retained in its bank of thumbwheel switches is displayed. Each electronic interval timing device also includes a numerical display on which the unexpired delay duration is displayed in numerical form whenever that interval timing device is operating. Each electronic interval timing device also includes an output solenoid and means for energizing the output solenoid for a predetermined period (e.g.