Panic exit device having an exit-delaying mechanism
US5011199A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1989 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Dec 28, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/0908
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A time-delayed mechanism obstructs movement of a latchbolt from its latched position to an unlatched position. Linkage coupled to the latchbolt, and manually acutated (by a push pad, or the like), includes an arm which normally pivots, with the manual actuation of the linkage. An initial, limited movement of the linkage activates a switch, and the latter activates a time delay circuit component. The latter component, following a specified time delay, interrupts power to a solenoid. The solenoid, normally powered, has a bar inductively movable therein with a rod joined thereto for coincident movement. An end of the rod carries a roller which intrudes into the pivotal arc of the arm, preventing full pivotable movement thereof. Consequently, the linkage, which is to move the latchbolt to its unlatched position is blocked until the time delay has run its course, whereupon the solenoid is de-energized. With deenergization of the solenoid, the bar, rod and roller are retracted, to permit full pivotal movement of the arm, and movement of the latchbolt to its unlatched position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.