Railways – Traction – Cable
Patent
1975-02-28
1976-09-21
Paperner, L. J.
Railways
Traction
Cable
49 29, 49 31, 49 49, B61B 1200
Patent
active
039812480
ABSTRACT:
A timing gate adapted to admit passengers to a chair ski-lift loading area is synchronized with the lift to allow passengers in the required number to approach crossing the path of the chairs around the lower bullwheel. At a timed interval after a chair has passed a chair operated switch, the gates open for a brief interval, a red light is turned off and a green light is turned on, and a gong is struck. After the brief interval the gates close and are locked and the green light is changed back to red. A weight operated switch may be used to prevent opening of the gates unless there are passengers waiting or the gate may open automatically after the passage of each chair. An inverted U-shaped frame has a pneumatic cylinder attached to each leg, the piston of each has secured thereto a rod-like gate projecting transversely through a helically extending slot in the cylinder 90.degree. therearound. Compressed air is conducted by tubing to either end of each cylinder and a solenoid operated reversing valve normally lowers the cylinders to close and lock the gates but, on a signal from the chair operated switch and through a time delay relay, the valve is reversed to admit air to the bottom of the cylinders to raise them briefly and to operate the gong and change the lights.
REFERENCES:
patent: 1706318 (1929-03-01), Orr
patent: 1737088 (1929-11-01), Kahler
patent: 3044764 (1962-07-01), Bonner
patent: 3348378 (1967-10-01), Lemley
patent: 3548753 (1970-12-01), Thurston
patent: 3561366 (1971-02-01), Pomagalski
patent: 3662229 (1972-05-01), Graff et al.
Hall Ski-Lift Company, Inc.
Paperner L. J.
Reese Randolph A.
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