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Thomas Watson, chairman of IBM ; 1943
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| Number | Title | Issue Date |
| 8297559 | Hand throw mechanism for in-tie switch machine A hand throw mechanism for an in-tie switch machine having a drive element which serves to move switch points from a first end point to a second end point. The mechanism includes an elongated hand throw arm having a first coupling element that includes a first lower... | 10/30/2012 |
| 7909294 | Modular railroad switch stand A switch stand for a railroad switch permits the switch to be locked against unauthorized movement of the switch. The switch stand permits trailing operation, even if locked. Passage of the rolling stock through the locked switch is permitted by allowing temporary m... | 03/22/2011 |
| 7323646 | Hand and foot switch A hand operable switch includes an operating knob that is movable longitudinally or rotationally about a longitudinal axis of the hand operable switch. The operating knob is accessible from any circumferential location of the hand operable switch. A housing includes... | 01/29/2008 |
| 7267304 | Railroad yard switch machine A railroad switch machine which is normally operated by an electric motor but which may be manually operated without causing rotation of the power shaft of the electric motor to enable the switch machine to move the switch points without having to overcome the brake... | 09/11/2007 |
| 6471163 | Ergonomic hand throw arm for railroad switch mechanism An improved ergonomic hand throw arm for use in conjunction with a railroad switch machine includes an elongated shank and a head disposed thereon. The shank includes a longitudinal axis, and the head includes a first opening and a second opening that are... | 10/29/2002 |
| 5642870 | Switch stand Improved railroad switch stands having an improved angled and elongate lever arm to protect the user from back injuries. The lever arm is angled so that an arc of less than 180 degrees is provided for movement of the lever arm from a first position to a s... | 07/01/1997 |
| 5582370 | Switch machine with ratchet mechanism on hand throw mechanism 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... | 12/10/1996 |
| 5480112 | Railroad switch stand having improved handle means A railroad switch stand is provided for operating a railroad switch between two positions. The switch stand comprises a connecting rod connected to an operating mechanism for causing reciprocation of the connecting rod, and a handle connected to the opera... | 01/02/1996 |
| 5419518 | Railroad switch stand having foot and hand accommodating throw handle A manually-operable railroad switch stand for causing movement of railroad switch points between two extreme operating positions is provided with a crank assembly that is connected to the switch stand input shaft for joint rotation and that has a pair of ... | 05/30/1995 |