Electronic horn arrangement

• US 4,204,200 A
• Filed: 10/11/1978
• Issued: 05/20/1980
• Est. Priority Date: 10/11/1978
• Status: Expired due to Term

• Current Assignee: Traintronics Incorporated
• Original Assignee: Traintronics Incorporated
• Inventors: Beyl, Earl L. Jr.
• Primary Examiner(s): Pitts, Harold I.
• Application Number:
  US05/950,275
• Time in Patent Office: 587 Days
• Field of Search: 340/384 R
• US Class Current: 340/384.72
• CPC Class Codes: G08B 3/10 using electric transmission; using electromagnetic transmission
• CPC Class Codes: G10H 1/26 for automatically producing a series of tones
• CPC Class Codes: G10H 2250/385 Train, i.e. sounds which are part of a railroad soundscape, e.g. steam engines, diesel, electric, train whistles, rail wheels, railway crossing

Abstract

The present invention provides a broad spectrum frequency variable horn arrangement which includes a power supply means, at least two electronic signal generating means driven by said power supply means, with each signal generating means adapted to provide square wave pulsed voltage output of selected amplitude and different frequency periods. Mixing means are provided to additively mix the instantaneous output of each of the signal generating means and means to supply the mixed signal to an audible sound generator means where the amplitude and frequency of the generated audible sound corresponds to the signal received by the mixing means.

Claims

1. The invention claimed is a broad spectrum frequency varying horn arrangement which includes direct current power supply means, at least two wave signal generating oscillating circuit means adapted to provide square wave pulsed voltage output of selected amplitude and different fixed frequency, mixing means to additively mix the instantaneous output signals of each signal generating ocillator means to provide a stepwise varying output signal and amplifier means to receive the mixed signals of the oscillator circuit means, amplify said signal and transmit said signal to an audible sound generator means.

2. The invention of claim 1 wherein each said oscillator circuit means each includes first and second signal inverter means each having an input and output, with the output of the first signal inverter means connected to the input of the second signal inverter means, the output of the second signal inverter means connected to said mixing means and where the input of said first signal inverter means is connected through capacitor menas to the output of said second signal inverter means where selected resistor means are provided from the output of said first signal inverter means to the capacitor means to determine the frequency of oscillation of said oscillator means.

3. The invention of claim 2 including 3 signal generating oscillator circuits wherein the output signal from each said oscillator circuit is a square wave pulsed signal of selected frequency different than the frequency of the other generators.

4. The invention of claim 3 wherein the frequency of each signal generator is selected such that no whole integer is evenly divisible into all three frequencies.