E - Fixed Constructions – 01 – B
Patent
E - Fixed Constructions
01
B
309/85, 346/99
E01B 7/24 (2006.01)
Patent
CA 1128636
Case 624.3 RAILROAD SWITCH HEATER ABSTRACT OF THE DISCLOSURE An apparatus for heating railroad rails such as those forming a railroad switch to prevent obstruction of the switch by ice and snow includes an elongate, bendable, high temperature heating cable disposed lengthwise against and along a side of the rail web. The cable comprises an electrical resistance heating wire encased in a high temperature resistant electrically insulat- ing material confined inside a thermally conductive deformable metal sheath. An elongate, pliable heat insulating mat is dis- posed lengthwise against and along a length of the cable and portions of the rail web laterally adjacent thereto to prevent heat losses by convection or radiation from the cable length. An elongate substantially rigid casing member is fitted lengthwise over the mat and bears against the web side to confine the mat in place, and is held tightly in place against the rail web. Current is supplied at high watt density through the resistance wire of the cable, generating heat which flows into the rail and through it and switch plates to a movable switch rail efficiently by conduc- tion.
334246
Keep Henry W. Jr.
Macrae & Co.
LandOfFree
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