stock rail การใช้

• Older turnouts use the same rail section, shaved down, for both stock rail and switch blade.
• The centre diagram shows how the switch rail has to be planed, and on the right it is shown fitting against the stock rail.
• Many older s & c units had a loose joint at the heel so that the switch rail could turn to close to the stock rail or open from it.
• The tangential switch rail has less steel planed away, and the mid part of the switch " scallops " into the web of the stock rail for greater strength.
• Under the terms of this agreement, Ultronics computed the S & P 500 Stock Composite Index, the 425 Stock Industrial Index, the 50 Stock Utility Index, and the 25 Stock Rail Index.
• "If only Charles Wild [ an engineer of another line ] had known of the recessed stock rails used on the Elgin Railway from 1821 much of the complexity of his mechanism might have been avoided ."
• Yet another disadvantage is that in very hot weather, expansion of the steel in the rails can cause the movable rails to stick to the stock rails, making switching impossible until the rails have cooled and contracted.
• As a result, it says, " the left hand switch rail was free to move across close to the left hand stock rail whilst the right hand switch rail remained, correctly, against the right hand stock rail ".
• As a result, it says, " the left hand switch rail was free to move across close to the left hand stock rail whilst the right hand switch rail remained, correctly, against the right hand stock rail ".