with bolts engaging a hooked keeper

Full Title

Fastening devices with bolts moving pivotally or rotatively > with latching action > with operating handle or equivalent member moving otherwise than rigidly with the latch > the bolt being spring-controlled > with bolts engaging a hooked keeper

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES

Subclass:

BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS