Command control for model railroading using AC track power signals for encoding pseudo-digital signals

  • US 5,773,939 A
  • Filed: 06/07/1995
  • Issued: 06/30/1998
  • Est. Priority Date: 11/16/1984
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of remotely controlling a selected effect in a model railroad layout having a track, the method comprising the steps of:

  • providing a receiver coupled to the track in the model railroad layout;

    encoding a desired command so as to form a digital command word for transmission to the receiver over the track, the digital command word consisting of a series of bits;

    providing an AC track power signal;

    for each bit in the series of bits that has a first binary state, positively full-wave rectifying the AC track power signal over one-half cycle beginning at a zero-crossing of the AC track power signal, so as to form a positive AC lobe;

    for each bit in the series of bits having a second binary state opposite the first binary state, negatively full-wave rectifying the AC track power signal over one-half cycle beginning at a zero-crossing of the AC track power signal so as form a negative AC lobe;

    sequentially applying the positive and negative AC lobes to the track until the series of bits is completed, thereby applying a selectively rectified AC track power signal to the track;

    receiving the AC track power signal in the receiver coupled to the track;

    recovering the digital command word from the received AC track power signal; and

    controlling the selected effect in the model railroad layout in response to the recovered digital command word, whereby the AC track power signal itself carries the digital command information over the track to the receiver.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×