FEATURES
Angles
and longer handle is designed to reduce back compression and
helps to prevent back injuries.
The
National automatic switch stand helps to solve the problem of
switch points that remain only partially thrown.
As the first pair of wheels forces the switch points
beyond the half-thrown position, the two double coil springs
inside the stand snap the switch points completely over.
If a train makes a partial trailing into the crotch of
the switch opening the switch points less than half way, then
backing out the coil springs return the switch points to their
original position.
Whenever
the switch is thrown, the target or light revolves to the new
indication, and the switch points remain in the new position
until the next switch operation, automatic or by hand.
Position of the hand lever remains unchanged regardless
of the number of times the stand is automatically operated.
CONSTRUCTION
All operating parts are designed and manufactured
for a long service life.
MAINTENANCE
Stand
is designed for utmost simplicity with few moving parts.
Parts may be renewed without removing stand from the
track. Operating mechanism is completely enclosed for protection
against dirt, snow and ice: the design prevents accumulation
of foreign matter in the housing.
When
a switch is set in the wrong position for a trailing movement
of a train or car, the wheels will force the switch to the
proper position allowing train or car to proceed over switch
without damage to switch stand or rolling stock.
In
the automatic operation, target revolves to correctly indicate
position of switch points, but there is no corresponding
movement of lever.
MANUAL
OPERATION
When a switch is set in the wrong position for a
facing point movement, stand can be manually operated to move
switch points to correct position by throwing lever 180°;
target will revolve to correctly indicated position of switch
points.
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