To fit or clasp together securely
interlock (plural interlocks)
- A safety device that prevents activation in unsafe conditions.
- The demonstrator couldn't figure out why the machine wouldn't work, until he remembered that there was an interlock so it wouldn't operate with the cover open.
- 1960 February, “The first of London's new Piccadilly Line trains is delivered”, in Trains Illustrated, page 94:
- Features such as trackless doors, mercury-type door interlocks, roof-mounted door fault indicator lights, rubber window glazing, improved retractable shoegear and a modified electro-pneumatic brake system designed to facilitate maintenance and improve reliability, which have proved their worth on the prototype trains, are continued in the new stock.