Variable volume horn system

• US 3,173,136 A
• Filed: 12/01/1960
• Issued: 03/09/1965
• Est. Priority Date: 12/01/1960
• Status: Expired due to Term

• Current Assignee: Duane E. Atkinson
• Original Assignee: Duane E. Atkinson
• Inventors: Atkinson, Duane E.
• Application Number:
  US04/073,052
• Time in Patent Office: 1,559 Days
• US Class Current: 340/384.7
• CPC Class Codes: G08B 3/00 Audible signalling systems; Audible personal calling systems
• CPC Class Codes: G08B 3/10 using electric transmission; using electromagnetic transmission

Claims

1. A VARIABLE VOLUME HORN SYSTEM COMPRISING A FIRST COINCIDENCE GATE, AN OSCILLATOR HAVING ITS OUTPUT CONNECTED AS AN INPUT TO SAID FIRST COINCIDENCE GATE, A MULTIVIBRATOR HAVING ONE OF ITS OUTPUT CONNECTED AS A SECOND INPUT TO SAID FIRST COINCIDENCE GATE, AN AMPLIFIER HAVING AN OUTPUT VARIABLE IN RESPONSE TO A CONTROL SIGNAL, THE OUTPUT OF SAID FIRST COINCIDENCE GATE BEING APPLIED AS AN INPUT TO THE VARIABLE AMPLIFIER, FIRST TRANSDUCING MEANS, THE OUTPUT OF SAID AMPLIFIER BEING COUPLED TO SAID FIRST TRANSDUCING MEANS, SECOND TRANSDUCING MEANS, A SECOND COINCIDENCE GATE, THE OUTPUT OF SAID SECOND TRANSDUCING MEANS BEING COUPLED TO AS AN INPUT TO SAID SECOND COINCIDENCE GATE, THE OTHER OUTPUT OF SAID MULTIVIBRATOR BEING COUPLED AS A SECOND INPUT TO SAID SECOND COINCIDENCE GATE, THE OUTPUT OF SAID SECOND COINCIDENCE GATE BEING COUPLED TO SAID VARIABLE AMPLIFIER AS SAID CONTROL SIGNAL FOR VARYING THE OUTPUT OF THE AMPLIFIER IN ACCORDANCE WITH THE OUTPUT OF SAID SECOND TRANSDUCER MEANS.