time lock 
noun
1A lock fitted with a device that prevents it from being unlocked until a set time.The story was one of a six-year-old boy accidentally locked into a bank strongroom, which can only be opened by an internal time lock after sixty-three hours....
- On Sunday night the couple, who run Darfield Post Office in Barnsley, were held for 12 hours by armed men who waited for the time lock to switch off before escaping with up to £100,000.
- Display notices if your safe is using a time lock and make sure your CCTV cameras cover risk or hold up points.
1.1A device built into a computer program to stop it operating after a certain time.It's a time lock, which means that after a certain period of time, the virus is automatically purged from the system.
verb
(time-lock) [with object] Secure (a door or other locking mechanism) with a time lock.He might have learned in those two years that the store's safe is time-locked at 9, but he started the robbery at 9:15 and thus got no money....
- They then smashed down a shutter but were unable to gain access to the safe because it was time-locked and they were forced to leave empty-handed.
- A number of the safes were time-locked but the thieves did succeed in gaining access to one and stuffed an undisclosed amount of cash into bags.