US 12,313,241 B2
Building egress lighting apparatus method and system with direction designator projection features
Daniel S. Spiro, Scottsdale, AZ (US)
Assigned to EXPOSURE ILLUMINATION ARCHITECTS, INC., Scottsdale, AZ (US)
Filed by Exposure Illumination Architects, Inc., Scottsdale, AZ (US)
Filed on May 2, 2024, as Appl. No. 18/653,762.
Application 18/653,762 is a continuation in part of application No. 18/230,215, filed on Aug. 4, 2023, granted, now 11,988,357.
Application 18/230,215 is a continuation in part of application No. 18/113,098, filed on Feb. 23, 2023, granted, now 11,788,692, issued on Oct. 17, 2023.
Application 18/113,098 is a continuation in part of application No. 17/843,540, filed on Jun. 17, 2022, granted, now 11,629,852, issued on Apr. 18, 2023.
Application 17/843,540 is a continuation in part of application No. 17/830,439, filed on Jun. 2, 2022, granted, now 11,573,005, issued on Feb. 7, 2023.
Prior Publication US 2024/0295296 A1, Sep. 5, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F21S 8/04 (2006.01); F21S 9/02 (2006.01)
CPC F21S 8/043 (2013.01) [F21S 9/022 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A light source device that is horizontally rotatable, the light source device comprising:
a light source being mountable over an illuminated path of egress and directs light toward an illuminated path of egress;
a narrow beam angle lens disposed over the light source that alters a pattern of light from the light source to project at least one directional egress path designator in substantial alignment with a central longitudinal axis of the illuminated path of egress; and
a light source retaining surface that is coupled to the light source and allows for the light source to be horizontally rotatable, wherein
the light source device is configured to controllably respond to a disruption in building power by initiating projection of the at least one directional path of egress designator onto the illuminated path of egress as an indication of an evacuation direction toward a building exterior.