Time lock is a security mechanism integrated into safes, vault doors, and other secure containers to prevent access until a pre-set time has elapsed. The concept relies on clockwork or electronic timers that disengage lock mechanisms only after the designated period. This device serves to enhance security protocols by limiting the opening of the safe to non-business hours, thereby reducing the risk of forced or coerced entry during vulnerable times.
The origins of time locks date back to the 19th century when banks needed improved security measures to defend against burglary attempts. The first patented time lock was introduced by Sargent and Greenleaf in 1873, revolutionising bank vault security. Modern time locks can be set to delay opening for a range of periods, from hours to several days, and are often paired with combination locks to provide dual security layers. In high-security environments, such as financial institutions or pharmaceutical dispensaries, these locks are critical in compliance with regulatory standards which mandate robust access control systems. Time locks also find utility in time-sensitive material containment, where unauthorised access could lead to premature disclosure or manipulation of sensitive data or assets.