Electronic lock system for door latch assembly
AssigneeHarrow Products, Inc.
InventorGeorge Frolov
Life of this patent
Estimating the term…
Abstract
An electronic lock assembly mounts to the opposite sides of a door to provide an electronically operable level of security. An electronic reader generates a signal which is employed to control the operation of a conventional latch installation. A card reader, key pad or contact activatable data port generates a signal to actuate a motor to disengage a locking dog to thereby allow rotation of the latch handle. The motor shaft is connected to a drive screw by a coil spring to permit proper operation if a jamming condition is present.
Claims20
A door lock system comprising:
- door means having opposite first and second sides;
- latch means for latching said door means comprising a latch and first operating means at said first side for operating said latch;
- electronic lock means comprising an input means accessible at said first side for generating an electrical signal in response to a pre-established input;
- engagement means comprising a locking dog, said locking dog being engageable with a receiver for preventing operation of said latch;
- driving means responsive to said electrical signal for engaging and disengaging said locking dog with said receiver;
- and
- coupling means for coupling said driving means and said engagement means, said coupling means comprising a spring and drive screw means, said spring having first and second end portions, said spring first end portion being fixedly coupled to said driving means, said spring second end portion being fixedly coupled to said drive screw means, said drive screw means being threadably engaged with said engagement means, wherein said driving means rotates said coupling means to displace said engagement means.
An electronic lock system for adding a security level to a door having a latch operable by a rotatable handle accessible at a first side for operation thereof comprising:
- electronic reader means for electronically reading an input;
- engagement means engageable with a receiver for preventing operation of said latch;
- lock means responsive to said electronic reader means for operating said engagement means, said lock means comprising a motor having a drive shaft;
- coupling means for coupling said drive shaft to said engagement means, said coupling means comprising a spring and a drive screw, said spring being fixedly coupled to said drive shaft and fixedly coupled to said drive screw, said drive screw being threadably engaged with said engagement means, wherein said drive shaft drives said coupling means to displace said engagement means to thereby engage or disengage said receiver;
- power supply means for supplying power to said lock means and said reader means;
- and
- mounting means for mounting said coupling means, lock means, supply means, and said electronic reader means to said door,
- wherein said latch may be selectively unlocked by a valid input at said electronic reader means.
A door lock system comprising:
- door means having opposite first and second sides;
- latch means for latching said door means comprising a latch and handle means at said first and second sides for operating said latch, said handle means defining an axis;
- input means accessible at said first side for generating an electrical release signal in response to a valid input;
- engagement means engageable with a receiver for preventing operation of said latch;
- lock means for imposing a lock condition on said latch and responsive to said signal, said lock means comprising a motor having a drive shaft defining an axis wherein said motor axis is coaxial with said handle axis;
- and
- coupling means for coupling said lock means to said engagement means, said coupling means comprising a spring and drive screw means, said spring being fixedly coupled to said motor and fixedly coupled to said drive screw means, said drive screw means being threadably engaged with said engagement means, wherein said drive shaft rotates said coupling means whereby said drive screw means displaces said engagement means to engage or disengage said receiver.
Dependencies are inferred from the claim text.