Railway switches and signals – Switches – Snow protected
Patent
1984-11-13
1987-06-23
Reeves, Robert B.
Railway switches and signals
Switches
Snow protected
15301, 104279, E01B 724
Patent
active
046747184
ABSTRACT:
In a method of preventing snow from bedding into railway switches, air is blown into the area between the stock rail and the movable rail in a switch, and substantially horizontally in a direction obliquely outwards towards the open end between the stock rail and the movable rail. An apparatus for carrying out this includes a blower assembly (8) between the rails in a railway switch, the assembly being supplied by a fan unit (20) and adapted to provide a substantially horizontal air discharge directed obliquely outwards towards the open end between the stock rail and the movable rail in their separated positions.
REFERENCES:
patent: 1778637 (1930-10-01), Hollinger
patent: 2700519 (1955-01-01), Gilmore et al.
patent: 2886266 (1959-05-01), Kistler
patent: 2898062 (1959-08-01), Magnus
patent: 3312820 (1967-04-01), Watkins
patent: 3874298 (1975-04-01), Smith et al.
patent: 3972497 (1976-08-01), Ringer
patent: 4081161 (1978-03-01), Upright
"How to Free Switches of Snow" by R. E. Dave-Sep., 1961, Railway Signaling & Communications, pp. 15-16.
Flakt AB
Hajec Donald T.
Reeves Robert B.
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