Switch machine with ratchet mechanism on hand throw mechanism

Details Switch machine with ratchet mechanism on hand throw mechanism Switch machine with ratchet mechanism on hand throw mechanism

1994-08-19

1996-12-10

Morano, S. Joseph

Railway switches and signals

Switch stands

Gear actuated

246393, 246410, 74523, 74528, 74545, 74546, 74547, 74575, 74577R, 74577M, B61L 502

Patent

active

055823700

ABSTRACT:
There is provided an improved hand throw device of an electric motor driven switch machine having a ratchet mechanism that permits torque to be applied to the hand throw device in either a clockwise or counter-clockwise direction as desired by an operator. The ratchet mechanism is a self contained module that can be easily installed to either side of the switch machine. The ratchet mechanism also permits the operator to assume a favorable position for application of force to the hand throw device with minimum stress and strain to his or her body. In addition, the ratchet mechanism has a gear system that provides a 2 to 1 mechanical advantage so that less torque is required for movement of the hand throw device.

REFERENCES:
patent: 1670472 (1928-05-01), Millward
patent: 3427448 (1969-02-01), Redelman
patent: 3599937 (1971-08-01), Carter
patent: 3875822 (1975-04-01), Erith et al.
patent: 5088694 (1992-02-01), Nishimura

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