Appeal 2007-1326
Application 10/237,067
1 receiver on the locomotive actually is. In addition, the electromagnetic
2 field is transmitted along wires connected to the track to control switches
3 for operating devices along the train track layout. Such devices could
4 include lights, flags, track switches for changing track direction, etc.”
5 (Young, col. 1, l. 67 – col. 2, l. 12).
6 08. Young states that the invention “preferably includes a microprocessor
7 in a locomotive, with a receiver/demodulator providing received signals
8 to the microprocessor. A manual switch coupled to the locomotive
9 allows it to be put into a program mode. In this program mode, for
10 instance, address information is sent along the track and received by the
11 train and stored in its memory as the address of that locomotive. In this
12 way, each locomotive can be programmed with a different address to
13 which it will respond during normal "run" operation. In addition, switch
14 controllers can be addressed in the same way.” (Young, col. 2,
15 ll. 13-25).
16 09. Young describes that its “[b]ase unit 14 transmits an RF signal
17 between the track and earth ground, which generates an electromagnetic
18 field indicated by lines 22 which propagates along the track. This field
19 will pass through a locomotive 24 and will be received by a receiver 26
20 inside the locomotive an inch or two above the track. The
21 electromagnetic field will also propagate along a line 28 to a switch
22 controller 30. Switch controller 30 also has a receiver in it, and will
23 itself transmit control signals to various devices, such as the track
24 switching module 32 or a moving flag 34 or a device 31. (Young, col. 3,
25 ll. 12-22).
13
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Last modified: September 9, 2013