Spike hole insert

Claim 1

AN ARTICLE OF MANUFACTURE FOR USE IN FASTENING A SPIKE IN A CLOSED BOTTOM HOLE PROVIDED IN A RAILWAY TRACK BASE STRUCTURE FOR SUPPORTING A RAIL COMPRISING: AN EXTRUDED ELONGATED CYLINDRICAL INSERT PLUG MADE FROM A PLASTICIZED POLYVINYL CHLORIDE RESIN AND HAVING AN ELASTIC MEMORY, SAID INSERT PLUG HAVING A THREAD FREE, RIB FREE AND SUBSTANTIALLY SMOOTH EXTERIOR SURFACE AND SAID PLUG HAVING A LONGITUDINALY EXTENDING SPIKE RECEIVING HOLE THERETHROUGH WHICH IS SUBSTANTIALLY SQUARE IN CROSS-SECTION BUT HAVING DIMENSIONS ABOUT 1/2 INCH LESS THAN THE 5/8 INCH SQUARE DIMENSIONS OF A RAILWAY SPIKE HAVING A LONGITUDINAL AXIS COINCIDENT WITH THE LONGITUDINAL AXIS OF SAID PLUG, SAID PLUG HAVING AN EXTERNAL DIAMETER SUBSTANTIALLY EQUAL TO THE DIAMETER OF THE CLOSED BOTTOM HOLE IN WHICH IT IS INSERTABLE SO THAT ITS EXTERIOR SURFACE WILL BE CONTIGUOUS WITH THE WALL OF THE CLOSED BOTTOM HOLE, AND SPIKE RECEIVING HOLE DIMENSIONS BEING SUCH THAT A RAILWAY SPIKE IS DRIVABLE INTO THE SPIKE RECEIVING HOLE OF SAID PLUG TO UNIFORMLY EXPAND THE PLUG LATERALLY INTO TIGHT PRESSURE SEALING ENGAGEMENT WITH THE WALL OF THE CLOSED BOTTOM HOLE IN SAID BASE STRUCTURE WHILE THE ELASTIC MEMORY OF SAID PLUG EXERTS A UNIFORM HOLDING POWER ON SAID SPIKE TO THEREBY ANCHOR THE RAIL TO SAID BASE STRUCTURE, A TAPERED BOTTOM PORTION OF SAID SPIKE BEING EXTENDABLE PAST SAID PLUG SPIKE RECEIVING HOLE INTO SAID BASE STRUCTURE THEREBELOW, SAID PLUG SUBSTANTIALLY CONFORMING TO THE WALL OF SAID BOTTOM HOLE TO PROTECT THE SURFACES THEREOF FROM THE DETERIORATING EFFECTS OF WEATHER, WATER, OIL AND BRINE AND THE SPIKE RECEIVING HOLE OF SAID PLUG VERY CLOSELY CONFORMING TO THE EXTERIOR SURFACE OF SAID SPIKE TO PREVENT WATER AND BRINE FROM CORRODING AND RUSTING THE SPIKE, AND THEREBY PREVENTING WATER AND BRINE FROM ENTERING THE CLOSED BOTTOM HOLE.