Abstract: An electrically operable cylinder lock device includes a body with a bore housing a rotatable barrel, having a key slot. The barrel is locked in position normally by a spring-loaded bar which extends axially of the barrel and is movable radially thereof. A slot in the barrel receives the bar and cam formations in the slot act to lift the bar to a withdrawn position in which it can be held by an electromagnet. A plunger in the bore has a slotted end to receive the tip of the key and provides a driving connection between the key and an output cam.

Abstract: A battery-less electronic cylinder lock comprises an electromagnet or other electrical release mechanism controlled by an electronic circuit. A cooperating key comprises a battery and a code producing circuit. When the key is inserted in the lock, power for the lock is supplied from the battery to the electronic circuit and the electromagnet by means of a transformer coupling arrangement with a primary portion in the key and a secondary portion in the lock. Alternatively, power may be supplied via electrical contacts on the key and on the lock.

Abstract: An electrically locked striker for a door locking means comprising a striker body shaped for mounting in a recess in a door frame with one face of said body substantially flush with the frame, a striker pivotally mounted on said body for angular movement about an axis perpendicular to said face, spring means urging said striker towards a locking position, and a bolt movable by electrically energizable means in a direction parallel to said face, said bolt being engageable in a recess in said striker to prevent rotation thereof.

Abstract: A key for an electronic lock is provided with a relief coding for reading by a mechanically actuated reading device. The key has a blade along a narrow edge face of which there are formed grooves (or pairs of notches) extending either perpendicularly to the length of the blade or inclined to the perpendicular in one sense or the other.A lock is described in which the grooves or notches are read by two separate reading elements and an electronic circuit determines the key coding by detecting whether the reading elements detect the grooves or notches at the same time or in one order or the other.