1.Previous
3.Next

"Keystone" module may be traced back to US Patent 4261633 of Aug 27, 1979 for a "Wiring module for telephone jack" - by Amp Incorporated.The module referred to in that patent was affixed by "A pair of diagonally inclined mounting flanges (which) include stepped, panel bearing surfaces .. at the outer free ends thereof." The unit was "inserted through the panel opening, with the sides of the opening resiliently deflecting the (mounting flanges), until they pass through the opening and spring outwardly away from the remainder of the housing,

1.Previous
3.Next