These requirements cover delayed-action timelocks intended for
attachment on the doors of safes, chests, vaults, and the like, to
provide a means for locking the door for a predetermined length of
time as protection against burglary or robbery or both.
The timelocks covered by these requirements may be automatic,
manual, or both, in operation depending upon their design.
Automatic devices can be factory set to a fixed minimum time delay
of 5 minutes. Manual devices are generally set by the user with a
key or similar device to provide delays of 120 hours or more. Some
designs may include both the automatic delay feature for interior
robbery protection and the manual delay feature for burglary
A product that contains features, characteristics, components,
materials, or systems new or different from those covered by the
requirements in this standard, and that involves a risk of fire or
of electric shock or injury to persons shall be evaluated using
appropriate additional component and end-product requirements to
maintain the level of safety as originally anticipated by the
intent of this standard. A product whose features, characteristics,
components, materials, or systems conflict with specific
requirements or provisions of this standard does not comply with
this standard. Revision of requirements shall be proposed and
adopted in conformance with the methods employed for development,
revision, and implementation of this standard.