Railway switches and signals – Electric automatic highway signals – mine doors – and gates – Car-actuated controller
Patent
1999-01-25
2000-08-22
Le, Mark T.
Railway switches and signals
Electric automatic highway signals, mine doors, and gates
Car-actuated controller
246261, 246125, 246292, 104 28, 104 30, 49131, 49 25, 49360, B61L 100
Patent
active
061059056
ABSTRACT:
A railway gate system comprising a railway station having an elevated platform area for passengers to stand and a recessed area with a track and a train movable therealong. A gate has a continuous upper restraining rail along its length. A plurality of cylindrical posts each have an upper end secured to the lower surface of the rail and a lower end. A horizontal recess and vertical apertures are located in the edge of the platform area adjacent to the track. The recess is adapted to receive the rail when lowered to an inoperative orientation and with the circular apertures adapted to slidably receive the posts. Motion imparting mechanisms include elongated pistons having upper ends secured to the lower surface of the rail, central extents extending through selected spaced circular apertures in the platform and lower ends. Hollow cylinders are located beneath the selected spaced circular apertures having open upper ends to receive the pistons. The cylinders have lower ends with radial apertures therethrough for receiving motive power. A hydraulic power center contains a control mechanism. A pair of electric eyes located at spaced locations along the length of the track including a first eye to detect the approach of a car and a second eye to detect the departure of a car and to provide an actuation signal and inactuation signal to the control mechanisms to raise the pistons, posts and rail upon the approach of a car and to lower them upon passage of a car.
REFERENCES:
patent: 1259060 (1918-03-01), West
patent: 1442431 (1923-01-01), Hoffay
patent: 1531118 (1925-03-01), McManus
patent: 1661051 (1928-02-01), Siano
patent: 4922655 (1990-05-01), Seal
patent: 5993104 (1999-11-01), Marcotullio et al.
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