Journal Published Online: 01 April 1986
Volume 31, Issue 2

The Breaking of Tempered Glass Vehicle Windows Using Broken Spark Plug Insulators

CODEN: JFSCAS

Abstract

A novel and efficient method for forced entry into vehicles using broken spark plug insulators to break the windows was reviewed. Various experiments were performed in which a number of objects, varying in their physical characteristics, were compared to the broken ceramic plus insulators in order to examine the uniqueness of the latter in the breaking of tempered glass. A plausible mechanism was presented attributing the great efficiency of the insulators to their hardness in relation to other materials (MOHS scale), and to their potential for the concentration of force in one point because of the sharp, jagged ends.

Author Information

Springer, E
Toolmarks and Materials Laboratory, Criminal Identification Division, Israel National Police, Jerusalem, Israel
Zeichner, A
Toolmarks and Materials Laboratory, Criminal Identification Division, Israel National Police, Jerusalem, Israel
Pages: 4
Price: $25.00
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Stock #: JFS12301J
ISSN: 0022-1198
DOI: 10.1520/JFS12301J