Railway switches and signals – Electric automatic highway signals – mine doors – and gates – Car-actuated controller
Patent
1991-03-22
1992-06-02
Spar, Robert J.
Railway switches and signals
Electric automatic highway signals, mine doors, and gates
Car-actuated controller
49 9, 49 93, 246111, B61L 2300
Patent
active
051180561
ABSTRACT:
An apparatus wherein a barricade structure is positioned in a first orientation below ground level and raised to a second position in above ground level orientation to provide a barricade relative to various railroad crossings and the like. The apparatus includes spaced parallel posts mounting a plurality of equally spaced bars therebetween, the bars include shock-absorbing plates equally spaced orthogonally relative to the bars and parallel to the posts. An individual or plurality of spools effects raising and lowering of the organization.
REFERENCES:
patent: 351552 (1886-10-01), Wilder
patent: 1213292 (1917-01-01), Stoll et al.
patent: 1661050 (1928-02-01), Siano
patent: 1759742 (1930-05-01), Galizia
patent: 1773043 (1930-08-01), King
patent: 2189974 (1940-02-01), Buford
patent: 2336483 (1943-12-01), Hoover
patent: 2394330 (1946-03-01), Sawyer
Eller James
Gilden Leon
Spar Robert J.
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