Mortise lock with lighted trim plate sign
US6932486B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2004 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Feb 23, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/8622
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A standard mortise latch lock escutcheon or trim plate having an aperture for housing an electroluminescent strip captured within a two-piece lens structure. A dc or ac external power supply converter is used in conjunction with the existing grid power. The converter is situated on the mortise lock casing. The electroluminescent strip is captured within the lens structure along with partially transparent, lettered signage. The lens structure has an outer lens with a protrusion to align the signage within the aperture. The lettered signage is reversed lettered, such that light emits through the letters and is blocked by an opaque background when the electroluminescent strip is supplied power. In instances where the mortise latch lock is used on doors for purposes other than egress, a switch may be used to toggle power to the signage when the thumb lever is turned in a locked position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.