LCN

Founded in 1877 by Lewis Carey Norton, LCN pioneered the door control industry after Norton was commissioned to solve the problem of slamming doors at Boston's Trinity Church, creating the world's first pneumatic door check in 1880 using a modified beer pump mechanism. Now headquartered in Princeton, Illinois, where closers have been manufactured since operations began, LCN operates as a premium brand under Allegion (formerly part of Ingersoll Rand, which acquired LCN through Schlage in 1974). The company's flagship 4040XP Series closer exemplifies their engineering excellence, meeting ANSI/BHMA A156.4 Grade 1 standards, ADA reduced opening force requirements, and carrying both UL and cUL listings for fire-rated applications up to 3 hours. LCN's comprehensive product line includes 35 different series of closers featuring the patented Green Dial spring power indicator, cast-iron cylinders, forged steel arms, double heat-treated steel pinions, and full complement bearings designed for 15-20 years of operating life. Key models include the heavy-duty 4010/4020/4110 Series (push side and pull side mounting options), the versatile 4040XP universal closer, specialty closers for narrow stile applications (1000 Series), concealed overhead models, and the innovative 6400 COMPACT Series that converts mechanical closers to automatic operators for touchless access. All products undergo rigorous testing protocols at the Princeton facility and carry a 30-year limited warranty, demonstrating LCN's commitment to quality that has made their closers the standard for high-traffic institutional applications including schools, hospitals, government buildings, and correctional facilities where durability, security, and code compliance are paramount.