MULTILAYER GLASS WITH LOCK-UP DEVICE IN CLEARANCE HOLE FOR OBJECTS Russian patent published in 2012 - IPC H01Q1/32 

FIELD: electricity.

SUBSTANCE: multilayer glass (1) with lock-up device (6) in clearance hole (5) for objects, in particular for antennas (8), clearance hole (5) is formed by holes with different diameter (2L, 3L), which are made in two hard multilayer glass units and lock-up device (6) contains at least two parts inserted into clearance hole (5) and resting opposite each other on edge surfaces of clearance hole (5). In accordance with invention both parts of lock-up device (6) rest at both sides od edge surfaces that surround lesser hole in glass (2), at that area of this lesser hole (2L) has high edge compression stress in comparison with remaining part of glass (2) surface.

EFFECT: strength improvement for multilayer glass.

19 cl, 2 dwg