US 4,979,383 AGranted

Lock having maid lockout and deadbolt protector

AssigneeYale Security Inc.

InventorClay E. Tully

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Abstract

This lock, which may be coded-keycard operated, has a set-table device on the inside of the door by which the maid, for instance, can be locked out. The lockout setting device is preferably in the form of a pushbutton or deadbolt turnpiece which manipulates a switch in the code-receiving circuitry. The lockout setting is automatically cancelled when the latch is retracted. When the setting device comprises a deadbolt turnpiece, the deadbolt is biased toward retracted position and the setting device holds the deadbolt extended. When the latch is retracted in the latter version, the retraction cancels the lockout setting and permits the deadbolt to retract under the power of the deadbolt biasing spring. The invention also includes a non-code-operated embodiment in which a deadbolt is spriing driven to retracted position as the latch is retracted in latching to protect the deadbolt, lock and door frame.

Claims7

Dependent claims

A lock for a door comprising:

a. a lockset including a latch having a horizontally reciprocable latch retractor having a laterally extending pin fixed thereon, a rotatable outside operator having an operating shaft for retracting the latch, normally inoperative, and a rotatable inside operator for retracting the latch,
b. electrically operated code-receiving and enabling means adapted upon receiving suitable code input on the outside of the door to make operative the outside operator.
c. lockout means selectively engageable on the inside of the door which, when engaged, alters the code-receiving and enabling means so that it does not make operative the outside operator despite its receiving the suitable code input, the lockout means comprising:
(1) an electrical switch in the lock connected into the code-receiving and enabling means and having a lockout-means-engaged position and a lockout-means-disengaged position, and
(2) actuator means for changing the position of the switch including manually operable means for moving the switch to the engaged position and cancelling means comprising the pin on the latch retractor for moving the switch to disengaged position when the latch is retracted.

2 more elements

Dependencies are inferred from the claim text.