US 5,398,175 A · Illuminated door knob lock

Abstract

An illuminated locking doorknob apparatus for a door has a door locking set. The door locking set has a knob and lock retaining mechanism that passes through the door. A lock core is removingly and rotatingly secured within the knob and lock retaining mechanism. At least one knob is releasingly secured to the knob and lock retaining mechanism. A keyhole, in the lock core, is accessible through a first port in a wall of the knob. An illumination circuit is within the door locking set. The illumination circuit has a removable DC power source and a removable DC light source in the circuit. The light source is adjacent the keyhole and the light source protrudes through a second port in the wall of the knob to illuminate the keyhole so that a key may be more easily inserted therein. There is a switch in the illumination circuit. The switch has a stationary contact and a sliding contact rod, connected to and actuated by the knob, springingly biased away from the stationary contact. There is a light diffusing directional lens, releasably connected to the wall of the knob, over the light source to protect the light source and to assist in placing light upon the keyhole.

Claims3

Dependent claims

An illuminated locking doorknob apparatus for a door, comprising:

a door locking set which further comprises:
a knob and lock retaining mechanism, passing through the door;
a lock core removingly and rotationally secured within the knob and retaining mechanism;
and
a keyhole located within the lock core, which is accessible through a first port in a wall of the knob;
an illumination circuit contained within the door locking set which further comprises:
a power source in the circuit;
a light source, disposed adjacent the keyhole and protruding through a second port in the wall of the knob;
and
a switch in the circuit, the switch further comprising:
a first contact which is attached to a stationary insulation member;
and
a second contact which is slidingly engagable with the first contact, the second contact being attached to the knob such that the first and second contacts are mated whenever inward pressure is applied to the knob, pushing the knob toward the door;
said first and second contacts becoming disengaged whenever the inward pressure is released from the knob;
and
a lens, connected to the wall of the knob, over the light source.

13 more elements

Dependencies are inferred from the claim text.

Illuminated door knob lock

Life of this patent

Illuminated door knob lock

Life of this patent

Abstract

Claims3