Electrically controlled door lock

• US 4,736,970 A
• Filed: 03/09/1987
• Issued: 04/12/1988
• Est. Priority Date: 03/09/1987
• Status: Expired due to Fees

• Current Assignee: Lawrence R. Mcgourty, Thomas K. Mcgourty
• Original Assignee: Lawrence R. Mcgourty, Thomas K. Mcgourty
• Inventors: McGourty, Lawrence R., McGourty, Thomas K.
• Primary Examiner(s): Gall, Lloyd A.
• Application Number:
  US07/023,144
• Time in Patent Office: 400 Days
• Field of Search: 70/283, 70/277, 70/224, 70/210, 70/282, 70/DIG. 3, 70/467, 70/469, 70/473, 70/471, 70/480, 70/470, 292/359, 292/144, 292/153, 292/169.18, 292/169.14
• US Class Current: 292/359
• CPC Class Codes: E05B 47/0004 said core being linearly movable
• CPC Class Codes: E05B 47/0661 axially, i.e. with an axially engaging blocking element
• CPC Class Codes: Y10T 292/96 Latch-spindle catches
• CPC Class Codes: Y10T 70/5394 Directly acting dog for exterior, manual, bolt manipulator
• CPC Class Codes: Y10T 70/5403 Dog having a dog
• CPC Class Codes: Y10T 70/713 Dogging manual operator

Abstract

A latch bar is connected to the plunger of a solenoid and is movable endwise to release an exterior knob spindle to enable the spindle to actuate a latch bolt retractor. A latch carried by the latch bar is held by the retractor to maintain the latch bar open until the retractor is later actuated by the spindle, thereby enabling a single electric pulse to effect release of the lock bar.

Claims

1. An electrically controlled door lock comprising

a lock frame for mounting in said door,

a knob spindle rotatably supported by said frame,

a lock bolt retractor supported by said frame,

means on said spindle for actuating said retractor upon rotation of said spindle,

means for preventing said spindle from rotating including a locking element movable between a spindle locking position and a spindle unlocking position;

spring means urging said locking element into said locking position,

electromagnetic means for moving said locking element into said unlocking position,

a latch carried by said locking element, and

said spring means urging said latch into engagement with said retractor whereby to latch said locking element in said unlocking position,

said retractor being effective upon actuation by said spindle to release said latch whereby to enable said spring means to move said locking element to said locking position.

2. An electrically controlled door lock as defined in claim 1 comprising

means supporting said locking element for movement lengthwise of said spindle, and

means on said locking element pivotally supporting said latch for movement into latching engagement with said retractor.

3. An electrically controlled door lock as defined in claim 1 comprising

a second knob spindle rotatably supported by said frame,

means on said second spindle for actuating said retractor independently of said first mentioned spindle upon rotation of said second spindle, and

means on said second spindle supporting said electromagnetic means.

4. An electrically controlled door lock comprising

a rotatable door knob spindle,

means for preventing said spindle from rotating including a locking element movable lengthwise of said spindle from a spindle unlocking position to a spindle locking position,

spring means urging said locking element into said locking position,

electromagnetic means including a plunger movable lengthwise of said spindle;

means pivotally connecting said plunger to said locking element whereby energization of said electromagnetic means causes said plunger to move said locking element to said unlocking position,

a spring biased latch for latching said locking element in said unlocking position upon movement of said locking element into said unlocking position, and

means operable by said spindle upon rotation thereof for releasing said latch whereby to enable said spring means to move said locking element to said locking position.

5. An electrically controlled door lock comprising

a lock frame for mounting in said door,

an exterior door knob spindle rotatably supported by said frame,

an interior door knob spindle rotatably supported by said frame,

a lock bolt retractor supported by said frame,

means on said exterior spindle for actuating said retractor,

means on said interior spindle for actuating said retractor independently of said exterior spindle,

a locking element for preventing rotation of said exterior spindle,

means supporting said locking element for movement lengthwise of said spindles between a spindle locking position and a spindle unlocking position,

spring means urging said locking element into said locking position,

solenoid means carried by said interior spindle for moving said locking element into said unlocking position, and

a latch pivotally supported by said locking element,

said spring means urging said latch into latching engagement with said retractor whereby to latch said locking element in said unlocking position,

said retractor being effective upon actuation by said exterior spindle to release said latch.