초록

An improved insulating plate for an insulated rail joint includes a main plate portion made of a thermo-plastic resin, thick portions formed on the main plate portion at its side face contacting a joint plate, and planar heater elements embedded in the thick portions.

대표청구항 ▼

In an insulating plate for forming an insulated rail joint by positioning said insulated plate between a rail and a joint plate clamped thereto, said insulating plate being of the type having upper and lower flanges connected by a web, whereby said insulating plate is clamped between the rail and th

In an insulating plate for forming an insulated rail joint by positioning said insulated plate between a rail and a joint plate clamped thereto, said insulating plate being of the type having upper and lower flanges connected by a web, whereby said insulating plate is clamped between the rail and the joint plate with the joint plate contacting said upper and lower flanges, the improvement of means for increasing the area of contact of said insulating plate with the joint plate and comprising: upper and lower portions of said insulating plate being thickened, said thickened portions comprising said upper and lower flanges and respective portions of said web contiguous to said upper and lower flanges; said insulating plate being formed of a thermoplastic resin material; and means, provided in said thickened portions only of said insulating plate, for heating said thickened portions to soften said thermoplastic resin material to an extent such that clamping of the joint plate enables the softened thermoplastic resin material of said thickened portions to deform to the configuration of the joint plate, whereby the joint plate contacts said insulating plate throughout the area of said thickened portions including said upper and lower flanges and said respective contiguous web portions.