Railroad track switch heater

Details Railroad track switch heater Railroad track switch heater

1996-08-05

1998-10-20

Hoang, Tu Ba

Electric heating

Heating devices

With heater-unit housing, casing, or support means

246428, 219536, H05B 306

Patent

active

058249974

ABSTRACT:
A high efficiency, direct conduction track switch heater (24) and associated spring clamp (70) are disclosed. The heater (24) includes a generally blade-shaped jacket (30) dimensioned for mounting on the gauge side 26 of a fixed rail (16) at the track switch interface. The jacket dimensions reduce the likelihood of impact damage due to track switching while providing an enlarged heat transfer surface (66). The spring clamp (70) presses the heater (24) tightly against the rail (16) while accommodating normal thermal expansions and providing a narrow profile for the overall heater and clamp assembly.

REFERENCES:
patent: Re31081 (1982-11-01), Keep, Jr.
patent: 2910567 (1959-10-01), Holstein
patent: 3233097 (1966-02-01), Watkins
patent: 3243573 (1966-03-01), Weisse et al.
patent: 3264472 (1966-08-01), Simmons
patent: 3349722 (1967-10-01), Davis
patent: 3394251 (1968-07-01), King et al.
patent: 3439161 (1969-04-01), McElwee et al.
patent: 3697746 (1972-10-01), Patterson et al.
patent: 4195805 (1980-04-01), Keep, Jr.
patent: 4391425 (1983-07-01), Keep, Jr.
patent: 4671475 (1987-06-01), Widmer
patent: 5004190 (1991-04-01), Montierth et al.

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