Electrically operable cylinder lock
AssigneeYale Security Products Limited
InventorWalter John Aston
Life of this patent
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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 A slot in the barrel receives the bar and cam formations in the slot act to lift the bar to a withdrawn position in which it can be held by an electromagnet.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.
Claims11
A lock device comprising a body having a bore with a direction of elongation defining an axial direction for the device, a rotatable barrel in said bore, said barrel being provided with an axially extending locking slot formation, an axially extending bar slidably mounted in the body for radial movement relative to the barrel between a detent position in which the bar projects into the locking slot formation to limit turning of the barrel and a release position in which the bar is clear of said locking slot formation, a cam formation on said barrel for displacing the bar from its detent position to its release position as the barrel is turned in the body and an electromagnet energisable to retain said bar by magnetic attraction in its release position.
Dependencies are inferred from the claim text.