Railway switches and signals – Switch stands
Reexamination Certificate
1999-04-19
2001-04-24
Morano, S. Joseph (Department: 3617)
Railway switches and signals
Switch stands
C246S358000, C246S382000, C246S41500R, C246S476000
Reexamination Certificate
active
06220553
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to railroad switch stands for moving a pair of switch points between two rails and diverting rolling stock from one track to another. More particularly, this invention relates to railroad switch stands that can remain operable after certain types of mechanical failures.
DESCRIPTION OF THE PRIOR ART
In switching rolling stock from one set of rails to another, a pair of stationary rails and a pair of switching rails are arranged so that the switching rails can be moved either to keep trains on a main track or divert them to a branch track. The switching rails are moved by a switching device which includes a connecting rod extending horizontally beneath the tracks that is connected to the switching rails.
The switching device typically includes a switch stand at one side of the rails which can be operated either manually or automatically. When operated by hand, a weighted lever arm lying horizontally on the ground or at the base of the switch stand can be lifted and thrown through an arc of 180° to the opposite side of the switch stand where it again will rest horizontally on the ground or base. The mechanism of the switch stand converts the rotational movement of the lever arm into the linear movement of the connecting rod which, in turn, controls the movement of the switching rails.
SUMMARY OF THE INVENTION
The principle object of this invention is to maintain a switch stand in operative condition if certain of the mechanical elements of the switch become disassociated from each other.
Another object of this invention is to provide means to permit a faulty switch stand to remain in operation until it can be repaired.
REFERENCES:
patent: 175743 (1876-04-01), Peeples
patent: 269958 (1883-01-01), Pinney
patent: 401671 (1889-04-01), Alkins
patent: 411998 (1889-10-01), Newman
Church Richard O.
Jules Frantz F.
Morano S. Joseph
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